Pub Date : 2025-05-01DOI: 10.1016/j.aaf.2024.03.003
Nadine Jacques , Bent Herrmann , Jesse Brinkhof , Manu Sistiaga
Fish behaviour affects the performance of selection devices in fishing gears. Traditionally, fish behaviour in relation to selection devices is assessed by direct observation. However, this approach has limitations, and the observations are not explicitly incorporated in the selectivity models. Further, underwater observations and quantification of fish behaviour can be challenging. In this study we outline and use an indirect method to explicitly incorporate and quantify fish behaviour in trawl selectivity analysis. We use a set of structural models, which are based on modelling the actual processes believed to determine the size selection of the device, to discern which behaviours are most likely to explain the selectivity process. By bootstrapping we assess how confident we can be in the choice of a specific structural model and on discerning the associated behavioural aspects. We collected size selectivity data in the Barents Sea demersal trawl fishery targeting gadoids, where the use of a sorting grid is compulsory. Using our modelling approach, we obtained deeper understanding of which behavioural processes most likely affect size selectivity in the sorting grids tested. Our approach can be applied to other fishing gears to understand and quantify fish behaviour in relation to size selectivity.
{"title":"Understanding size selectivity of trawls using structural models: Methodology and a case study on fish sorting grids","authors":"Nadine Jacques , Bent Herrmann , Jesse Brinkhof , Manu Sistiaga","doi":"10.1016/j.aaf.2024.03.003","DOIUrl":"10.1016/j.aaf.2024.03.003","url":null,"abstract":"<div><div>Fish behaviour affects the performance of selection devices in fishing gears. Traditionally, fish behaviour in relation to selection devices is assessed by direct observation. However, this approach has limitations, and the observations are not explicitly incorporated in the selectivity models. Further, underwater observations and quantification of fish behaviour can be challenging. In this study we outline and use an indirect method to explicitly incorporate and quantify fish behaviour in trawl selectivity analysis. We use a set of structural models, which are based on modelling the actual processes believed to determine the size selection of the device, to discern which behaviours are most likely to explain the selectivity process. By bootstrapping we assess how confident we can be in the choice of a specific structural model and on discerning the associated behavioural aspects. We collected size selectivity data in the Barents Sea demersal trawl fishery targeting gadoids, where the use of a sorting grid is compulsory. Using our modelling approach, we obtained deeper understanding of which behavioural processes most likely affect size selectivity in the sorting grids tested. Our approach can be applied to other fishing gears to understand and quantify fish behaviour in relation to size selectivity.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 3","pages":"Pages 499-513"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-05-01DOI: 10.1016/j.aaf.2024.08.002
Suryanto Suryanto, Duto Nugroho, Umi Muawanah, Setiya Triharyuni, Dian Oktaviani, Sandi Wibowo, Novi Susetyo Adi, Puput Dani Prasetyo Adi
In common practices, fishing vessels' Greenhouse Gas (GHG) emission is a part of the energy sector. Annual series data show Indonesian fishing vessels are growing by more than 18,000 units/year, dominated by fishing vessels with a tonnage of less than 30 GT. A ′bottom-up' approach was applied to develop low-carbon fishing activity practices to contribute to GHG emission reduction. This study focuses on a GHG inventory of fishing vessels managed by local and central Governments, using data from fishing permits and vessel monitoring systems from 2010 to 2018. The result is expected to act as the baseline for estimating emissions of fishing vessels up to 2030. The model predicted it could be reduced in 2030 by up to 6.43 E+07 tons CO2eq (68%) for fishing vessels with a size of less than 30 GT and up to 5.80E+06 tons CO2eq (84.5%) for a larger size of fishing vessels, respectively. To achieve further mitigation targets, mixing diesel oil using 30% biodiesel should be implemented progressively by 10% annually from 2021. Concerning fisher welfare after 2015, it shows a positive trend along with energy efficiency, and it can be concluded that strategies to improve the energy efficiency of active fishing vessels should be considered urgent.
{"title":"The potential contribution of Indonesian fishing vessels in reducing Green House gas emission","authors":"Suryanto Suryanto, Duto Nugroho, Umi Muawanah, Setiya Triharyuni, Dian Oktaviani, Sandi Wibowo, Novi Susetyo Adi, Puput Dani Prasetyo Adi","doi":"10.1016/j.aaf.2024.08.002","DOIUrl":"10.1016/j.aaf.2024.08.002","url":null,"abstract":"<div><div>In common practices, fishing vessels' Greenhouse Gas (GHG) emission is a part of the energy sector. Annual series data show Indonesian fishing vessels are growing by more than 18,000 units/year, dominated by fishing vessels with a tonnage of less than 30 GT. A ′bottom-up' approach was applied to develop low-carbon fishing activity practices to contribute to GHG emission reduction. This study focuses on a GHG inventory of fishing vessels managed by local and central Governments, using data from fishing permits and vessel monitoring systems from 2010 to 2018. The result is expected to act as the baseline for estimating emissions of fishing vessels up to 2030. The model predicted it could be reduced in 2030 by up to 6.43 E+07 tons CO2eq (68%) for fishing vessels with a size of less than 30 GT and up to 5.80E+06 tons CO2eq (84.5%) for a larger size of fishing vessels, respectively. To achieve further mitigation targets, mixing diesel oil using 30% biodiesel should be implemented progressively by 10% annually from 2021. Concerning fisher welfare after 2015, it shows a positive trend along with energy efficiency, and it can be concluded that strategies to improve the energy efficiency of active fishing vessels should be considered urgent.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 3","pages":"Pages 372-381"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-05-01DOI: 10.1016/j.aaf.2023.11.003
Vander Bruno Santos, Lucas Rosan Furquim
This study aimed to evaluate growth curves among different common carp genotypes, according to fingerling performance and morphometry. Fingerlings selected according to Nishikigoi pattern, either (9.66 ± 1.47) cm in standard length, from crossbred and pure carp, respectively, were cultivated in 8 cages (4 replicates for each genotype), measuring 9 m³ (3.0 m × 2.0 m × 1.5 m) each, in a 1500 m2 (12 m × 125 m) pond at a depth of 1.60 m with 10 fingerlings/m³. Fish were fed four times a day at the rate of 5%–7% of biomass with the same specific diet for each growth stage. Forty carp of each genotype (10 fish/cage) were weighed at days 0, 60, 150, 270 and 330 of cultivation. They were weighed and measured for head length, standard length, body height and body width. The Gompertz model was fit for weight × age data for comparison of absolute and relative growth rate, weight and age at the inflection points. The crossbred genotype showed better survival, weight gain and feed conversion compared to pure carp (P < 0.05). The final weight estimate at 330 days was 38.45% higher in the crossbred genotype (289.16 g) when compared to the pure carp (208.85 g). The pure genotype presented lower weight (431.60 g), age (559.71 days) and absolute growth rate (1.03 g/day) at the inflection points when compared to the crossbred genotype (587.69 g; 559.71 days and 1.46 g/day, respectively). Body morphometric relationships changed with fish growth, and this occurred differently, depending on carp genotype evaluated. From these results, it can be concluded that crossing Nishikigoi with Hungarian carp can be a strategy to improve desirable characteristics in koi.
本研究的目的是根据鱼种性能和形态测定来评价不同基因型鲤鱼的生长曲线。按Nishikigoi模式选择标准长度为（9.66±1.47）cm的杂交鲤和纯鲤鱼种，分别饲养于8个网箱中（每个基因型4个重复），网箱尺寸为9 m³（3.0 m × 2.0 m × 1.5 m），池深为1.60 m，池深为1500 m2 (12 m × 125 m)，每m³10条鱼种。每个生长阶段采用相同的特定饲料，每天投喂4次，投喂量为生物量的5% ~ 7%。分别于养殖第0、60、150、270和330天称重，每种基因型各40条，每笼10条。他们称重并测量了头长、标准长度、身体高度和身体宽度。采用Gompertz模型对体重×年龄数据进行拟合，比较绝对增长率和相对增长率，以及拐点处的体重和年龄。与纯种鲤鱼相比，杂交基因型的成活率、增重和饲料系数更高(P <；0.05)。杂交基因型在330天的最终体重估计（289.16 g）比纯鲤鱼（208.85 g）高38.45%。纯基因型在拐点处的体重（431.60 g）、日龄（559.71 d）和绝对生长率（1.03 g/d）均低于杂交基因型(587.69 g；559.71 d和1.46 g/d)。鱼体形态计量学的关系随着鱼的生长而变化，而且这种变化的方式因所评估的基因型不同而不同。从这些结果可以得出结论，西锦井与匈牙利鲤鱼杂交可以改善锦鲤的理想特性。
{"title":"Evaluation of growth performances of crossbreds and backcrossbreds with purebreds Nishikigoi and Hungarian carp (Cyprinus carpio)","authors":"Vander Bruno Santos, Lucas Rosan Furquim","doi":"10.1016/j.aaf.2023.11.003","DOIUrl":"10.1016/j.aaf.2023.11.003","url":null,"abstract":"<div><div>This study aimed to evaluate growth curves among different common carp genotypes, according to fingerling performance and morphometry. Fingerlings selected according to Nishikigoi pattern, either (9.66 ± 1.47) cm in standard length, from crossbred and pure carp, respectively, were cultivated in 8 cages (4 replicates for each genotype), measuring 9 m³ (3.0 m × 2.0 m × 1.5 m) each, in a 1500 m<sup>2</sup> (12 m × 125 m) pond at a depth of 1.60 m with 10 fingerlings/m³. Fish were fed four times a day at the rate of 5%–7% of biomass with the same specific diet for each growth stage. Forty carp of each genotype (10 fish/cage) were weighed at days 0, 60, 150, 270 and 330 of cultivation. They were weighed and measured for head length, standard length, body height and body width. The Gompertz model was fit for weight × age data for comparison of absolute and relative growth rate, weight and age at the inflection points. The crossbred genotype showed better survival, weight gain and feed conversion compared to pure carp (<em>P</em> < 0.05). The final weight estimate at 330 days was 38.45% higher in the crossbred genotype (289.16 g) when compared to the pure carp (208.85 g). The pure genotype presented lower weight (431.60 g), age (559.71 days) and absolute growth rate (1.03 g/day) at the inflection points when compared to the crossbred genotype (587.69 g; 559.71 days and 1.46 g/day, respectively). Body morphometric relationships changed with fish growth, and this occurred differently, depending on carp genotype evaluated. From these results, it can be concluded that crossing Nishikigoi with Hungarian carp can be a strategy to improve desirable characteristics in koi.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 3","pages":"Pages 452-458"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139538253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to elucidate the structural characteristics and gene expression of the tissues of the digestive system of adult Eriocheir sinensis, this study was conducted to systematically study the digestive system of E. sinensis using histological and transcriptomic techniques. The results showed that the digestive system of E. sinensis mainly consisted of the esophagus, stomach (including cardia stomach and pyloric stomach), midgut, intestinal bulb, hindgut and hepatopancreas. In the cardia stomach, calcification of the cuticle into cuticular ossicles, chitin tooth, ridge, bristles and other structures were observed at different sites, which together form the "Gastric mill" for grinding food. The pyloric stomach contains special comb-like structures and rows of pectinate bristles, which are important components of the gland filter for filtering and sifting food. The wall of the digestive tract of E. sinensis consists of four layers: the mucosal layer, the submucosal layer, the muscular layer and the outer membrane, of which the surface of the mucosal layer of the esophagus and hindgut has a well-developed cuticle with rows of setae, and the submucosal layer has special mucus glands (esophageal glands or hindgut glands); the surface of the mucosal layer of the midgut has no cuticle and has dense microvillus. The intestinal bulb has the morphological characteristics of the transition from midgut to hindgut. The hepatopancreas consists of many hepatic tubules, and four types of cells are often seen in the hepatic tubules, including absorptive cells (R cells), vesicular cells (B cells), fibroblasts (F cells), and embryonic cells (E cells). The transcriptome data of the digestive system of E. sinensis showed that Esophagus, Stomach, Midgut, Intestinal bulb, Hindgut and hepatopancreas expressed 13252, 13285, 13634, 11147, 13127, 12551 genes respectively; and they specifically expressed 1529, 549, 1199, 624,990, 1688 genes respectively. A total of 25 digestive enzyme genes were isolated from six tissues of the digestive system. Except for maltosidase-glucoamylase and phosphatase A2, which had small differences in expression in various tissues of the digestive system, all other digestive enzymes had the highest expression in the hepatopancreas. Digestive enzymes with high expression in the hepatopancreas are trypsin, pancreatic rennin, carboxypeptidase B, ɑ-amylase, and astacin.
{"title":"Histological observations and gene expression of the digestive system of the Chinses mitten crab (Eriocheir sinensis)","authors":"Zhiyong Zhang , Hewei Jiang , Yufei Liu , Xugan Wu , Xiaowu Chen","doi":"10.1016/j.aaf.2023.12.003","DOIUrl":"10.1016/j.aaf.2023.12.003","url":null,"abstract":"<div><div>In order to elucidate the structural characteristics and gene expression of the tissues of the digestive system of adult <em>Eriocheir sinensis</em>, this study was conducted to systematically study the digestive system of <em>E</em>. <em>sinensis</em> using histological and transcriptomic techniques. The results showed that the digestive system of <em>E</em>. <em>sinensis</em> mainly consisted of the esophagus, stomach (including cardia stomach and pyloric stomach), midgut, intestinal bulb, hindgut and hepatopancreas. In the cardia stomach, calcification of the cuticle into cuticular ossicles, chitin tooth, ridge, bristles and other structures were observed at different sites, which together form the \"Gastric mill\" for grinding food. The pyloric stomach contains special comb-like structures and rows of pectinate bristles, which are important components of the gland filter for filtering and sifting food. The wall of the digestive tract of <em>E. sinensis</em> consists of four layers: the mucosal layer, the submucosal layer, the muscular layer and the outer membrane, of which the surface of the mucosal layer of the esophagus and hindgut has a well-developed cuticle with rows of setae, and the submucosal layer has special mucus glands (esophageal glands or hindgut glands); the surface of the mucosal layer of the midgut has no cuticle and has dense microvillus. The intestinal bulb has the morphological characteristics of the transition from midgut to hindgut. The hepatopancreas consists of many hepatic tubules, and four types of cells are often seen in the hepatic tubules, including absorptive cells (R cells), vesicular cells (B cells), fibroblasts (F cells), and embryonic cells (E cells). The transcriptome data of the digestive system of <em>E</em>. <em>sinensis</em> showed that Esophagus, Stomach, Midgut, Intestinal bulb, Hindgut and hepatopancreas expressed 13252, 13285, 13634, 11147, 13127, 12551 genes respectively; and they specifically expressed 1529, 549, 1199, 624,990, 1688 genes respectively. A total of 25 digestive enzyme genes were isolated from six tissues of the digestive system. Except for maltosidase-glucoamylase and phosphatase A2, which had small differences in expression in various tissues of the digestive system, all other digestive enzymes had the highest expression in the hepatopancreas. Digestive enzymes with high expression in the hepatopancreas are trypsin, pancreatic rennin, carboxypeptidase B, ɑ-amylase, and astacin.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 3","pages":"Pages 411-420"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139193269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tilapia aquaculture is a commercially important and lucrative trade with global production predicted to increase in the future. Owing to the robust and disease-resistant nature of tilapia, tilapia aquaculture has expanded and intensified over the years. However, the intensification of tilapia aquaculture has led to the emergence of diseases, whereby viral diseases represent a prominent limiting factor to the growth of aquaculture. This review aims to discuss all viral infections in tilapia, with emphasis on the aetiology, occurrence, transmission, pathology, diagnostic methods, and control measures to mitigate outbreaks of viral diseases in aquaculture. To date, ten viral infectious diseases have been reported globally in various tilapia species reared in aquaculture or laboratory settings. To our knowledge, this review article represents the first instance of reviewing tilapia parvovirus (TiPV) infection in tilapia, in addition to tilapia larvae encephalitis virus (TLEV), infectious spleen and kidney necrosis virus (ISKNV), iridovirus-like agent, novel megalocytivirus, Bohle iridovirus (BIV), lymphocystis disease virus (LCDV), infectious pancreatic necrosis virus (IPNV), nervous necrosis virus (NNV), and tilapia lake virus (TiLV).
{"title":"Current updates on viral infections affecting tilapia","authors":"Christal Winona Clyde, Jin Ping Tan, Swee Keong Yeap, Chean Yeah Yong","doi":"10.1016/j.aaf.2024.05.002","DOIUrl":"10.1016/j.aaf.2024.05.002","url":null,"abstract":"<div><div>Tilapia aquaculture is a commercially important and lucrative trade with global production predicted to increase in the future. Owing to the robust and disease-resistant nature of tilapia, tilapia aquaculture has expanded and intensified over the years. However, the intensification of tilapia aquaculture has led to the emergence of diseases, whereby viral diseases represent a prominent limiting factor to the growth of aquaculture. This review aims to discuss all viral infections in tilapia, with emphasis on the aetiology, occurrence, transmission, pathology, diagnostic methods, and control measures to mitigate outbreaks of viral diseases in aquaculture. To date, ten viral infectious diseases have been reported globally in various tilapia species reared in aquaculture or laboratory settings. To our knowledge, this review article represents the first instance of reviewing tilapia parvovirus (TiPV) infection in tilapia, in addition to tilapia larvae encephalitis virus (TLEV), infectious spleen and kidney necrosis virus (ISKNV), iridovirus-like agent, novel megalocytivirus, Bohle iridovirus (BIV), lymphocystis disease virus (LCDV), infectious pancreatic necrosis virus (IPNV), nervous necrosis virus (NNV), and tilapia lake virus (TiLV).</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 3","pages":"Pages 355-371"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141695085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-05-01DOI: 10.1016/j.aaf.2023.12.001
T. Araya-Schmidt, P.D. Winger, G. Peck
This study evaluated the performance of chocolate squid (Todarodes pacificus) bait as a lower-cost alternative to traditional squid bait in a snow crab (Chionoecetes opilio) fishery in Eastern Canada. The results showed that pots with chocolate squid bait had significantly lower catch rates compared to pots with traditional squid bait. The chocolate squid bait significantly reduced the number of crabs caught per pot by 13.99% and the weight of crabs caught per pot by 2.88 kg. Although the chocolate squid bait is cheaper, the decrease in catch rates could require increased effort to reach individual quotas, which could lead to longer or more frequent fishing trips and more traps being fished, increasing fuel consumption and habitat disruption, resulting in negative environmental impacts. Finding alternative lower-cost baits that maintain catch rates remains a key priority for reducing operational costs and minimizing environmental impacts in the snow crab fishery.
{"title":"Chocolate squid (Todarodes pacificus) bait reduces snow crab catch rates","authors":"T. Araya-Schmidt, P.D. Winger, G. Peck","doi":"10.1016/j.aaf.2023.12.001","DOIUrl":"10.1016/j.aaf.2023.12.001","url":null,"abstract":"<div><div>This study evaluated the performance of chocolate squid (<em>Todarodes pacificus</em>) bait as a lower-cost alternative to traditional squid bait in a snow crab (<em>Chionoecetes opilio</em>) fishery in Eastern Canada. The results showed that pots with chocolate squid bait had significantly lower catch rates compared to pots with traditional squid bait. The chocolate squid bait significantly reduced the number of crabs caught per pot by 13.99% and the weight of crabs caught per pot by 2.88 kg. Although the chocolate squid bait is cheaper, the decrease in catch rates could require increased effort to reach individual quotas, which could lead to longer or more frequent fishing trips and more traps being fished, increasing fuel consumption and habitat disruption, resulting in negative environmental impacts. Finding alternative lower-cost baits that maintain catch rates remains a key priority for reducing operational costs and minimizing environmental impacts in the snow crab fishery.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 3","pages":"Pages 494-498"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139021150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-05-01DOI: 10.1016/j.aaf.2023.12.006
Marios Charalambides , Michalis Menicou , George Triantaphyllidis
Global demand for seafood is constantly increasing, driven by population growth and rising per capita consumption. While wild-capture fisheries are facing limitations in meeting this demand, the expansion of aquaculture emerges as the only solution. This paper investigates the potential for increasing the aquaculture production in the Republic of Cyprus by transitioning towards offshore aquaculture farms. The model developed provides a valuable roadmap for offshore transitions in Mediterranean near-coast areas. The study includes a detailed economic analysis coupled with sensitivity analysis to assess the feasibility of this transition considering various expansion scenarios. The results provide valuable insights into the viability and implications of this process, highlighting economic and operational issues.
{"title":"Economic feasibility study for the expansion of the Cyprus aquaculture sector: A roadmap for transition to offshore in the Mediterranean Sea","authors":"Marios Charalambides , Michalis Menicou , George Triantaphyllidis","doi":"10.1016/j.aaf.2023.12.006","DOIUrl":"10.1016/j.aaf.2023.12.006","url":null,"abstract":"<div><div>Global demand for seafood is constantly increasing, driven by population growth and rising per capita consumption. While wild-capture fisheries are facing limitations in meeting this demand, the expansion of aquaculture emerges as the only solution. This paper investigates the potential for increasing the aquaculture production in the Republic of Cyprus by transitioning towards offshore aquaculture farms. The model developed provides a valuable roadmap for offshore transitions in Mediterranean near-coast areas. The study includes a detailed economic analysis coupled with sensitivity analysis to assess the feasibility of this transition considering various expansion scenarios. The results provide valuable insights into the viability and implications of this process, highlighting economic and operational issues.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 3","pages":"Pages 522-531"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139872976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-05-01DOI: 10.1016/j.aaf.2024.03.008
Chang Liu , Jingqin Ye , Chang'e Wang , Hengliang Wang , Ying Lu
Tetrodotoxin (TTX) is a potent neurotoxin found in nature, the possible presence of TTX in pufferfish ovaries, liver, and other processing waste poses a serious environmental and safety hazard. Lactic acid bacteria (LAB) was found to be able to remove a variety of harmful substances, however, its elimination action and mechanism on TTX is not clear. In this study, the removal effects of different states (activated, inactivated, and fragmented LABs) of three LAB strains on TTX amount and toxicity were tested and compared. It was found that thermal inactivated LABs had the best effect, which could reduce the TTX amount by 49.0%–60.33% and decrease the toxicity of TTX by 57.0%–83.67%. In addition, peptidoglycan (PG) of three strains of LABs was found to be a key component in the removal of TTX, which could decrease the toxicity of TTX by more than 87.0 %. By analyzing the changes of functional groups of PGs, zeta-potential and binding effect between PG and TTX before and after the masking of carboxyl or amino groups of PGs, it was found that the removal effect of PG to TTX was significantly decreased (>55.0%) when the carboxyl or amino groups of PGs were masked. At the same time, the zeta-potential of PG combined with TTX was also decreased. These results suggested that the amino and carboxyl groups of PGs were important action sites for the binding interaction between LAB and TTX, and electrostatic interaction might be one of the ways of binding between PG and TTX. Our study could provide a scientific supporting on the removal action mechanism research of PG to TTX.
{"title":"Lactic acid bacteria reduce the toxicity of tetrodotoxin through peptidoglycan mediated binding","authors":"Chang Liu , Jingqin Ye , Chang'e Wang , Hengliang Wang , Ying Lu","doi":"10.1016/j.aaf.2024.03.008","DOIUrl":"10.1016/j.aaf.2024.03.008","url":null,"abstract":"<div><div>Tetrodotoxin (TTX) is a potent neurotoxin found in nature, the possible presence of TTX in pufferfish ovaries, liver, and other processing waste poses a serious environmental and safety hazard. Lactic acid bacteria (LAB) was found to be able to remove a variety of harmful substances, however, its elimination action and mechanism on TTX is not clear. In this study, the removal effects of different states (activated, inactivated, and fragmented LABs) of three LAB strains on TTX amount and toxicity were tested and compared. It was found that thermal inactivated LABs had the best effect, which could reduce the TTX amount by 49.0%–60.33% and decrease the toxicity of TTX by 57.0%–83.67%. In addition, peptidoglycan (PG) of three strains of LABs was found to be a key component in the removal of TTX, which could decrease the toxicity of TTX by more than 87.0 %. By analyzing the changes of functional groups of PGs, zeta-potential and binding effect between PG and TTX before and after the masking of carboxyl or amino groups of PGs, it was found that the removal effect of PG to TTX was significantly decreased (>55.0%) when the carboxyl or amino groups of PGs were masked. At the same time, the zeta-potential of PG combined with TTX was also decreased. These results suggested that the amino and carboxyl groups of PGs were important action sites for the binding interaction between LAB and TTX, and electrostatic interaction might be one of the ways of binding between PG and TTX. Our study could provide a scientific supporting on the removal action mechanism research of PG to TTX.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 3","pages":"Pages 421-428"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-05-01DOI: 10.1016/j.aaf.2024.02.005
Christopher B. Rillahan , Michael T. Coute , Daniel Ward , Pingguo He
Tautog, a coastal marine wrasse, is a highly sought food fish in southern New England and the Mid-Atlantic region of the United States due to its firm white fillet. Tautog has been identified as a candidate species for marine aquaculture in the region. Unfortunately, previous grow out studies have documented slow growth, which is detrimental for aquaculture. However, these studies contrast with data from wild populations which indicate rapid growth in the first few years of life. It is theorized that these differences in growth could be due to available diets. In the wild, tautog primarily prey on mollusks and crustacean prey, while laboratory studies rely on commercial fishmeal-based diets. This study compared the growth and survival of juvenile tautog fed with chopped green crabs, commercial fish pellets and a hybrid diet consisting of both green crabs and pellets. Wild juvenile tautog were collected from local waters and cultivated in a recirculating aquaculture system for 250 days. Tautog fed the commercial pellet diet had a growth rate of 0.31 ± 0.11 mm/day, consistent with previous grow out studies. The average growth rate of tautog fed the green crab diet was 0.52 ± 0.13 mm/day, with a peak growth rate of 0.66 ± 0.07 mm/day. The hybrid diet was intermediate to the other treatments at an average growth rate of 0.46 ± 0.1 mm/day. Statistically significant differences were observed across treatment groups (P < 0.05). Survival was high in the green crab and hybrid treatments (96.7% ± 1.2% and 96.0% ± 2.0%, respectively), and lower in the pellet treatment (85.3% ± 9.5 %). Data from this study indicate that the growth potential of tautog is higher than previously documented in aquaculture studies. This study highlights the need for additional research to develop feed formulations for non-piscivorous marine carnivores.
{"title":"Comparing the growth and survival of tautog (Tautoga onitis) fed a diet of green crab (Carcinus maenas) or commercial pellets in a recirculating aquaculture system","authors":"Christopher B. Rillahan , Michael T. Coute , Daniel Ward , Pingguo He","doi":"10.1016/j.aaf.2024.02.005","DOIUrl":"10.1016/j.aaf.2024.02.005","url":null,"abstract":"<div><div>Tautog, a coastal marine wrasse, is a highly sought food fish in southern New England and the Mid-Atlantic region of the United States due to its firm white fillet. Tautog has been identified as a candidate species for marine aquaculture in the region. Unfortunately, previous grow out studies have documented slow growth, which is detrimental for aquaculture. However, these studies contrast with data from wild populations which indicate rapid growth in the first few years of life. It is theorized that these differences in growth could be due to available diets. In the wild, tautog primarily prey on mollusks and crustacean prey, while laboratory studies rely on commercial fishmeal-based diets. This study compared the growth and survival of juvenile tautog fed with chopped green crabs, commercial fish pellets and a hybrid diet consisting of both green crabs and pellets. Wild juvenile tautog were collected from local waters and cultivated in a recirculating aquaculture system for 250 days. Tautog fed the commercial pellet diet had a growth rate of 0.31 ± 0.11 mm/day, consistent with previous grow out studies. The average growth rate of tautog fed the green crab diet was 0.52 ± 0.13 mm/day, with a peak growth rate of 0.66 ± 0.07 mm/day. The hybrid diet was intermediate to the other treatments at an average growth rate of 0.46 ± 0.1 mm/day. Statistically significant differences were observed across treatment groups (<em>P</em> < 0.05). Survival was high in the green crab and hybrid treatments (96.7% ± 1.2% and 96.0% ± 2.0%, respectively), and lower in the pellet treatment (85.3% ± 9.5 %). Data from this study indicate that the growth potential of tautog is higher than previously documented in aquaculture studies. This study highlights the need for additional research to develop feed formulations for non-piscivorous marine carnivores.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 3","pages":"Pages 469-474"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140401064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-05-01DOI: 10.1016/j.aaf.2024.02.001
Raquel S.F. Vieira , Diana Sousa , Luís M. Félix , Carlos A.S. Venâncio
Aquaculture procedures such as capturing, handling, and transporting fish can lead to stress in animals. For this reason, anaesthesia has been recommended to reduce fish stress during these procedures. Synthetic and natural anaesthetics such as tricaine methanesulfonate (MS-222) and eugenol (monoterpene) are commonly used; however, biochemical changes and aversive effects have been reported. Other monoterpene compounds such as thymol and menthol, have shown potential anaesthetic effects in fish species. Thus, further investigation of its anaesthetic properties seems imperative, and the use of the zebrafish in the early stages of its development is an appropriate model due to its advantages. Therefore, the aimed to evaluate the anaesthetic profile of thymol and menthol in zebrafish at 72 hpf (hours post fertilisation). Following the determination of the effective anaesthetic concentration, three concentrations (100, 200 and 300 mg/L for thymol and 200, 400 and 500 mg/L for menthol) were further tested by focusing on mortality rate, heart rate, behaviour features of induction and oxidative effects in comparison to MS-222 and eugenol. Both monoterpenes caused anaesthetic effects in a concentration-dependent manner, with concentrations of 200 mg/L exhibiting a similar profile to MS-222 and eugenol, as evidenced by the increased recovery times.
Furthermore, anaesthesia with thymol and menthol caused post-anaesthesia motor pattern abnormalities, which supported some indicators of stress. Slight modifications in physiological parameters and antioxidant changes were observed, but their association with thymol and menthol anaesthesia is unclear. Although supporting its anaesthetic use, more extensive research will be required to fully understand the impact of these natural anaesthetics on fish behaviour and stress levels, ultimately leading to safer and more successful anaesthetic operations in the future.
{"title":"Anaesthetic profile of thymol and menthol in zebrafish larvae model","authors":"Raquel S.F. Vieira , Diana Sousa , Luís M. Félix , Carlos A.S. Venâncio","doi":"10.1016/j.aaf.2024.02.001","DOIUrl":"10.1016/j.aaf.2024.02.001","url":null,"abstract":"<div><div>Aquaculture procedures such as capturing, handling, and transporting fish can lead to stress in animals. For this reason, anaesthesia has been recommended to reduce fish stress during these procedures. Synthetic and natural anaesthetics such as tricaine methanesulfonate (MS-222) and eugenol (monoterpene) are commonly used; however, biochemical changes and aversive effects have been reported. Other monoterpene compounds such as thymol and menthol, have shown potential anaesthetic effects in fish species. Thus, further investigation of its anaesthetic properties seems imperative, and the use of the zebrafish in the early stages of its development is an appropriate model due to its advantages. Therefore, the aimed to evaluate the anaesthetic profile of thymol and menthol in zebrafish at 72 hpf (hours post fertilisation). Following the determination of the effective anaesthetic concentration, three concentrations (100, 200 and 300 mg/L for thymol and 200, 400 and 500 mg/L for menthol) were further tested by focusing on mortality rate, heart rate, behaviour features of induction and oxidative effects in comparison to MS-222 and eugenol. Both monoterpenes caused anaesthetic effects in a concentration-dependent manner, with concentrations of 200 mg/L exhibiting a similar profile to MS-222 and eugenol, as evidenced by the increased recovery times.</div><div>Furthermore, anaesthesia with thymol and menthol caused post-anaesthesia motor pattern abnormalities, which supported some indicators of stress. Slight modifications in physiological parameters and antioxidant changes were observed, but their association with thymol and menthol anaesthesia is unclear. Although supporting its anaesthetic use, more extensive research will be required to fully understand the impact of these natural anaesthetics on fish behaviour and stress levels, ultimately leading to safer and more successful anaesthetic operations in the future.</div></div>","PeriodicalId":36894,"journal":{"name":"Aquaculture and Fisheries","volume":"10 3","pages":"Pages 401-410"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140269211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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