The present study aimed to investigate the distribution status and ecological effects of the introduction of three major invasive fish species viz. Hemiculter leucisculus, Carassius auratus and Pseudorasbora parva in Iran. This review provides useful information about non-native species for readers. This research can play an important role to protecting aquatic ecosystems in Iran and other parts of the world.
{"title":"A brief review of the geographic ranges and ecological effects of three major invasive cyprinid species in Iran","authors":"A. Radkhah, S. Eagderi","doi":"10.17017/j.fish.305","DOIUrl":"https://doi.org/10.17017/j.fish.305","url":null,"abstract":"The present study aimed to investigate the distribution status and ecological effects of the introduction of three major invasive fish species viz. Hemiculter leucisculus, Carassius auratus and Pseudorasbora parva in Iran. This review provides useful information about non-native species for readers. This research can play an important role to protecting aquatic ecosystems in Iran and other parts of the world.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"06 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85974433","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}
The present study was carried out to assess the population structure, growth and condition factor of Aphanius marasantensis Pfleiderer, Geiger & Herder 2014 in Süreyyabey Dam Lake, Turkey. The age of A. marassantensis ranged between 0+ and 3+ years. The sex percentage was determined as 62.30% males and 37.70% females. Total length and body weight of individuals ranged from 2.8 – 4.10 cm and 0.305 – 1.371 g respectively. The von Bertalanffy growth equations were calculated as Lt = 384.001 [1 – e–0.235 (t + 0.88)]; Wt = 1365.52 [1 – e–0.235 (t + 0.88)] 3.1217. The condition factor for all individual was 1.676.
{"title":"Population structure and some growth properties of endemic Aphanius marassantensis Pfleiderer, Geiger & Herder 2014 in Süreyyabey Dam Lake, Turkey","authors":"S. Benzer","doi":"10.17017/j.fish.327","DOIUrl":"https://doi.org/10.17017/j.fish.327","url":null,"abstract":"The present study was carried out to assess the population structure, growth and condition factor of Aphanius marasantensis Pfleiderer, Geiger & Herder 2014 in Süreyyabey Dam Lake, Turkey. The age of A. marassantensis ranged between 0+ and 3+ years. The sex percentage was determined as 62.30% males and 37.70% females. Total length and body weight of individuals ranged from 2.8 – 4.10 cm and 0.305 – 1.371 g respectively. The von Bertalanffy growth equations were calculated as Lt = 384.001 [1 – e–0.235 (t + 0.88)]; Wt = 1365.52 [1 – e–0.235 (t + 0.88)] 3.1217. The condition factor for all individual was 1.676.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"47 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73706879","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}
Kishor Kumar Sarker, Moumita Saha, Irin Sultana, Naim Khandakar, Sabiha Islam, M. Baki, Delip K. Das
Nijhum Dweep National Park lacks a detailed inventory of aquatic fauna including fish. This study reported the diversity and abundance of fish along with their conservation status from the surrounding waters of the national park to fill the knowledge gap. Fish samples were collected randomly from 16 spots of surrounding water of the park between October 2017 and March 2018. There were 47 fish species recorded belonging to 10 orders, 27 families and 44 genera. Odontamblyopus rubicundus was the dominant fish species that comprised 20.24% of the total catch, followed by Rhinomugil corsula (15.54%), Mystus gulio (12.03%) and Eleutheronema tetradactylum (9.92%). One nationally Endangered fish species (Clupisoma garua) and three Vulnerable fish species (Gudusia chapra, Sicamugil cascasia and Wallago attu) were recorded. Fish diversity of the park was rich but exceeding extraction rate, huge disposal of by catch, and presence of exotic omnivorous fish species was disconcerting that require monitoring and further studies.
{"title":"Diversity and conservation status of fish in the Nijhum Dweep National Park, Bangladesh","authors":"Kishor Kumar Sarker, Moumita Saha, Irin Sultana, Naim Khandakar, Sabiha Islam, M. Baki, Delip K. Das","doi":"10.17017/j.fish.279","DOIUrl":"https://doi.org/10.17017/j.fish.279","url":null,"abstract":"Nijhum Dweep National Park lacks a detailed inventory of aquatic fauna including fish. This study reported the diversity and abundance of fish along with their conservation status from the surrounding waters of the national park to fill the knowledge gap. Fish samples were collected randomly from 16 spots of surrounding water of the park between October 2017 and March 2018. There were 47 fish species recorded belonging to 10 orders, 27 families and 44 genera. Odontamblyopus rubicundus was the dominant fish species that comprised 20.24% of the total catch, followed by Rhinomugil corsula (15.54%), Mystus gulio (12.03%) and Eleutheronema tetradactylum (9.92%). One nationally Endangered fish species (Clupisoma garua) and three Vulnerable fish species (Gudusia chapra, Sicamugil cascasia and Wallago attu) were recorded. Fish diversity of the park was rich but exceeding extraction rate, huge disposal of by catch, and presence of exotic omnivorous fish species was disconcerting that require monitoring and further studies.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"33 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82835452","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}
The study reveals the first record of prawn species Laptocarpus potamiscus (Kemp, 1917) from Karnataka coast, West Coast of India. The genus Laptocarpus mainly described by their prominent key characters viz., presence of antennal spines, a prominent branchiostegal grooves and the absence of branchiostegal spines on the carapace. Globally, the genus Leptocarpus represents only three species with its Asian distribution, hitherto recorded from different localities across the Indian subcontinent. Specimen collected from Kali River estuary, Karwar being the first record from the Karnataka state. The morphological characters examined were similar to the description revealed for L. potamiscus by Kemp and Jayachandran. Hence, the study updates geographical distribution of L. potamiscucs from the Karnataka coast.
{"title":"First record of Prawn Leptocarpus potamiscus (Kemp, 1917) (Crustacea: Decapoda: Palaemonidae) from Karnataka, West Coast of India","authors":"Rajeshree Pednekar, Shivakumar Haragi","doi":"10.17017/j.fish.318","DOIUrl":"https://doi.org/10.17017/j.fish.318","url":null,"abstract":"The study reveals the first record of prawn species Laptocarpus potamiscus (Kemp, 1917) from Karnataka coast, West Coast of India. The genus Laptocarpus mainly described by their prominent key characters viz., presence of antennal spines, a prominent branchiostegal grooves and the absence of branchiostegal spines on the carapace. Globally, the genus Leptocarpus represents only three species with its Asian distribution, hitherto recorded from different localities across the Indian subcontinent. Specimen collected from Kali River estuary, Karwar being the first record from the Karnataka state. The morphological characters examined were similar to the description revealed for L. potamiscus by Kemp and Jayachandran. Hence, the study updates geographical distribution of L. potamiscucs from the Karnataka coast.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"14 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78380064","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}
J. S. Limbago, Josette Sosas, Angelie A Gente, Parif Maderse, Marjorie M Rocamora, D. K. Gomez
The emergence of multiple drug-resistant pathogens, affecting aquaculture and public health, has put the spotlight on alternative medicine research. This study was conducted to evaluate the In vitro and In vivo antibacterial activity of mangrove ethanolic leaf extract (MLEE) against Salmonella arizonae isolated from Carassius auratus. In vitro, antimicrobial activity of 10 mangrove species and 13 commercial antibiotics were determined using the agar diffusion method. MLEE with the highest antimicrobial activity were subjected to qualitative phytochemical tests and bioassay experiments. In vivo antibacterial activity of MLEE was assessed using C. auratus intraperitoneally injected with S. arizonae. Results showed that Sonneratia alba has the highest antimicrobial activity against S. arizonae followed by Avicennia marina, A. officinalis, Sonneratia ovata, Rhizophora mucronata, Excoecaria agallocha, and Bruguiera cylindrica. However, bacterial isolate was resistant to A. rhumpiana, Scyphiphora hydrophyllacea, and Laguncularia racemosa. Interestingly, S. alba has comparable antimicrobial activity with amoxicillin, trimethoprim, novobiocin, and cefixime. The activity of S. alba could be attributed to the presence of flavonoids, saponin, sterols, tannin, and terpenoids. Moreover, S. alba has reduced and delayed the onset of goldfish mortality infected with S. arizonae. Based on these findings, the S. alba MLEE, is a potential antimicrobial resource against S. arizonae.
{"title":"Antibacterial effects of mangrove ethanolic leaf extract against zoonotic fish pathogen Salmonella arizonae","authors":"J. S. Limbago, Josette Sosas, Angelie A Gente, Parif Maderse, Marjorie M Rocamora, D. K. Gomez","doi":"10.17017/j.fish.260","DOIUrl":"https://doi.org/10.17017/j.fish.260","url":null,"abstract":"The emergence of multiple drug-resistant pathogens, affecting aquaculture and public health, has put the spotlight on alternative medicine research. This study was conducted to evaluate the In vitro and In vivo antibacterial activity of mangrove ethanolic leaf extract (MLEE) against Salmonella arizonae isolated from Carassius auratus. In vitro, antimicrobial activity of 10 mangrove species and 13 commercial antibiotics were determined using the agar diffusion method. MLEE with the highest antimicrobial activity were subjected to qualitative phytochemical tests and bioassay experiments. In vivo antibacterial activity of MLEE was assessed using C. auratus intraperitoneally injected with S. arizonae. Results showed that Sonneratia alba has the highest antimicrobial activity against S. arizonae followed by Avicennia marina, A. officinalis, Sonneratia ovata, Rhizophora mucronata, Excoecaria agallocha, and Bruguiera cylindrica. However, bacterial isolate was resistant to A. rhumpiana, Scyphiphora hydrophyllacea, and Laguncularia racemosa. Interestingly, S. alba has comparable antimicrobial activity with amoxicillin, trimethoprim, novobiocin, and cefixime. The activity of S. alba could be attributed to the presence of flavonoids, saponin, sterols, tannin, and terpenoids. Moreover, S. alba has reduced and delayed the onset of goldfish mortality infected with S. arizonae. Based on these findings, the S. alba MLEE, is a potential antimicrobial resource against S. arizonae.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"22 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81469491","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}
Gujarat being a state having largest coastline and highest continental shelf in India represents diverse coastal habitats. Gujarat has vast potential of marine bioresources and offer considerable scope for marine fisheries. The ichthyofaunal diversity of Sutrapada, Gir Somnath district, Gujarat was investigated for a period of three years from June 2015 to June 2018 through the analysis of fish catch data of trawl fisheries and achieves of Fisheries Department, Central Institute of Fisheries Technology - Central Marine Fisheries Research Institute (CIFT-CMFRI), Marine Products Export Development Authority (MPEDA) and Commissioner Fisheries Office, Veraval. During this study period, 114 fish species belonging to 55 families and 93 genera were identified. The paper emphasizes the importance of further research on respective families for understanding of its distribution, ecology and conservation status.
{"title":"Ichthyofaunal diversity and fishery status of Sutrapada Coast, Gujarat, India","authors":"S. Singh, K. Sarma, Dhaval M. Bhatt, P. Mankodi","doi":"10.17017/j.fish.291","DOIUrl":"https://doi.org/10.17017/j.fish.291","url":null,"abstract":"Gujarat being a state having largest coastline and highest continental shelf in India represents diverse coastal habitats. Gujarat has vast potential of marine bioresources and offer considerable scope for marine fisheries. The ichthyofaunal diversity of Sutrapada, Gir Somnath district, Gujarat was investigated for a period of three years from June 2015 to June 2018 through the analysis of fish catch data of trawl fisheries and achieves of Fisheries Department, Central Institute of Fisheries Technology - Central Marine Fisheries Research Institute (CIFT-CMFRI), Marine Products Export Development Authority (MPEDA) and Commissioner Fisheries Office, Veraval. During this study period, 114 fish species belonging to 55 families and 93 genera were identified. The paper emphasizes the importance of further research on respective families for understanding of its distribution, ecology and conservation status.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80530356","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}
P. S. Brishti, Kazi Sonia Sultana, M. J. Islam, S. Sarkar, Md. Baki Billah, K. Habib
The Sonadia Island, located at the south-east coast of Bangladesh, comprises a wide variety of wetland habitats including mudflats, sand dunes and mangroves which made this island a favoured habitat for diversified molluscan fauna. This paper deals with the new distributional record of two species of marine Bivalvia in Bangladesh- Tellinides timorensis Lamarck, 1818 and Vepricardium coronatum (Schröter, 1786) belonging to the family Tellinidae and Cardiidae respectively. Analysis of taxonomy, diagnosis of shell, geographic distribution and habitat, illustrations of each species and identification characteristics were presented in this paper.
{"title":"Two new records of bivalve (Mollusca) from Sonadia Island, Bangladesh","authors":"P. S. Brishti, Kazi Sonia Sultana, M. J. Islam, S. Sarkar, Md. Baki Billah, K. Habib","doi":"10.17017/j.fish.299","DOIUrl":"https://doi.org/10.17017/j.fish.299","url":null,"abstract":"The Sonadia Island, located at the south-east coast of Bangladesh, comprises a wide variety of wetland habitats including mudflats, sand dunes and mangroves which made this island a favoured habitat for diversified molluscan fauna. This paper deals with the new distributional record of two species of marine Bivalvia in Bangladesh- Tellinides timorensis Lamarck, 1818 and Vepricardium coronatum (Schröter, 1786) belonging to the family Tellinidae and Cardiidae respectively. Analysis of taxonomy, diagnosis of shell, geographic distribution and habitat, illustrations of each species and identification characteristics were presented in this paper.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"29 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74724646","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}
Shina Al-Habeeb Aroyehun, W. O. Alegbeleye, O. Agbebi, A. Akinde
Production of cheap and quality dietary protein to replace the expensive conventional protein was studied in an 84-day feeding trial of Nile tilapia Oreochromis niloticus. African mesquite (Prosopis africana) seeds were subjected to fermentation processes and four iso-nitrogenous diets (35% crude protein) were formulated to contain graded levels of fermented African mesquite seed meal (FMS) to replace soybean meal (SBM) at four inclusion levels (0%, 15%, 30% and 45%) replicated in a completely randomised design. Proximate analysis showed increased in crude protein (35.10% to 41.29%), amino acids concentration, minerals content (calcium and phosphorus) while there were reductions in crude fibre (7.79% to 2.13%), crude lipids (4.02% to 2.67%) and anti-nutritional factors of FMS. The highest protein digestibility of 83.35% was recorded in FMS30 while FMS15 showed the least (77.07%). Carcass compositions were affected by diets composition. The minimum feeding cost of US$ 0.88 kg−1 was registered in FMS45 while FMS15 recorded the highest value of US$ 1.37 kg−1. In conclusion, 45% of FMS could replace SBM without compromising growth performance of Nile tilapia.
在尼罗罗非鱼84 d饲养试验中，研究了生产廉价、优质的饲料蛋白质以替代昂贵的常规蛋白质。在完全随机设计中，对非洲豆科植物(Prosopis africana)种子进行发酵处理，并配制4种等氮饲粮(35%粗蛋白质)，以不同水平的发酵非洲豆科植物种子粕(FMS)代替豆粕(SBM)，添加水平分别为0%、15%、30%和45%。近端分析表明，粗蛋白质(35.10% ~ 41.29%)、氨基酸浓度、矿物质(钙和磷)含量均有所增加，而粗纤维(7.79% ~ 2.13%)、粗脂(4.02% ~ 2.67%)和抗营养因子均有所降低。蛋白质消化率最高的是FMS30(83.35%)，最低的是FMS15(77.07%)。胴体组成受日粮组成的影响。FMS45的最低饲养成本为0.88 kg - 1美元，而FMS15的最高饲养成本为1.37 kg - 1美元。综上所述，45%的FMS可以在不影响尼罗罗非鱼生长性能的情况下替代SBM。
{"title":"Evaluation of fermented African mesquite seed (Prosopis africana) on growth and nutrient digestibility of Nile tilapia (Oreochromis niloticus) fingerlings","authors":"Shina Al-Habeeb Aroyehun, W. O. Alegbeleye, O. Agbebi, A. Akinde","doi":"10.17017/j.fish.277","DOIUrl":"https://doi.org/10.17017/j.fish.277","url":null,"abstract":"Production of cheap and quality dietary protein to replace the expensive conventional protein was studied in an 84-day feeding trial of Nile tilapia Oreochromis niloticus. African mesquite (Prosopis africana) seeds were subjected to fermentation processes and four iso-nitrogenous diets (35% crude protein) were formulated to contain graded levels of fermented African mesquite seed meal (FMS) to replace soybean meal (SBM) at four inclusion levels (0%, 15%, 30% and 45%) replicated in a completely randomised design. Proximate analysis showed increased in crude protein (35.10% to 41.29%), amino acids concentration, minerals content (calcium and phosphorus) while there were reductions in crude fibre (7.79% to 2.13%), crude lipids (4.02% to 2.67%) and anti-nutritional factors of FMS. The highest protein digestibility of 83.35% was recorded in FMS30 while FMS15 showed the least (77.07%). Carcass compositions were affected by diets composition. The minimum feeding cost of US$ 0.88 kg−1 was registered in FMS45 while FMS15 recorded the highest value of US$ 1.37 kg−1. In conclusion, 45% of FMS could replace SBM without compromising growth performance of Nile tilapia.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88502542","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}
M. Harun-ur-Rashid, Md Akhtar Hossain, M. R. Mondol, S. Nabi, Md. Abu Sikendar, Md. Anwar Hossain
Reduced culture period with lack of guidelines in selecting appropriate species are major constraints for promotion of small indigenous species (SIS) based carp polyculture in ponds under drought prone area. In order to address this issue, an experiment was conducted to determine the suitable species for farming of SIS fishes in carp polyculture ponds in Rajshahi district, Bangladesh. Three different species of SIS fishes were tested under three treatments (T1, Heteropneustes fossilis; T2, Clarias batrachus; T3, Mystus cavasius). Carp species were Hypophthalmichthys molitrix, Gibelion catla and Labeo rohita. Stocking density of SIS fishes (37050 individuals ha–1) and carps (H. molitrix, 500; G. catla, 250 and L. rohita 250 individuals ha–1) were same for all the treatments. Fishes were fed 35% protein containing supplementary feed twice a day at the rate of 6% of biomass. Common water quality parameters were monitored monthly and found within the suitable range for fish culture. Treatment T2 was significantly higher than others in terms of fish yield and cost benefit ratio. Further research is also recommended to optimize the stocking density of C. batrachus based carp polyculture.
{"title":"Species suitability for small indigenous species (SIS) of fish farming in carp polyculture ponds under drought prone area","authors":"M. Harun-ur-Rashid, Md Akhtar Hossain, M. R. Mondol, S. Nabi, Md. Abu Sikendar, Md. Anwar Hossain","doi":"10.17017/j.fish.314","DOIUrl":"https://doi.org/10.17017/j.fish.314","url":null,"abstract":"Reduced culture period with lack of guidelines in selecting appropriate species are major constraints for promotion of small indigenous species (SIS) based carp polyculture in ponds under drought prone area. In order to address this issue, an experiment was conducted to determine the suitable species for farming of SIS fishes in carp polyculture ponds in Rajshahi district, Bangladesh. Three different species of SIS fishes were tested under three treatments (T1, Heteropneustes fossilis; T2, Clarias batrachus; T3, Mystus cavasius). Carp species were Hypophthalmichthys molitrix, Gibelion catla and Labeo rohita. Stocking density of SIS fishes (37050 individuals ha–1) and carps (H. molitrix, 500; G. catla, 250 and L. rohita 250 individuals ha–1) were same for all the treatments. Fishes were fed 35% protein containing supplementary feed twice a day at the rate of 6% of biomass. Common water quality parameters were monitored monthly and found within the suitable range for fish culture. Treatment T2 was significantly higher than others in terms of fish yield and cost benefit ratio. Further research is also recommended to optimize the stocking density of C. batrachus based carp polyculture.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"19 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81730810","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}
The veined whelk (Rapana venosa) is a widely known invasive species in the Black Sea. This species exerts negative impacts on the Black Sea ecosystem including destruction of bivalve, mussel and oyster populations. This study aimed to examine population structure using the length-frequency distribution and shell dimensions of R. venosa, collected from the Black Sea. A total of 506 specimens were collected from the Trabzon Coast and classified into 6 age groups using the Bhattacharya method. The Von-Bertalanffy growth parameters were calculated as L∞ = 10.29 cm, k = 0.09, t0 = 1.25 yr–1. The mortality and exploitation rates were estimated as total mortality Z = 0.51 yr–1, fishing mortality F = 0.31 yr–1, annual mortality M = 0.20 yr–1 and exploitation rate E = 0.60 yr–1. This study will help understanding the growth of R. venosa and its management.
脉螺(Rapana venosa)是黑海一种广为人知的入侵物种。该物种对黑海生态系统产生负面影响，包括破坏双壳类，贻贝和牡蛎种群。本研究的目的是利用在黑海采集的R. venosa的长度-频率分布和壳尺寸来研究种群结构。在Trabzon海岸采集了506个标本，采用Bhattacharya方法将其划分为6个年龄组。Von-Bertalanffy生长参数计算为L∞= 10.29 cm, k = 0.09, t0 = 1.25 year - 1。死亡率和捕捞率分别为总死亡率Z = 0.51年- 1，捕捞死亡率F = 0.31年- 1，年死亡率M = 0.20年- 1，捕捞率E = 0.60年- 1。本研究将有助于了解黄颡鱼的生长和管理。
{"title":"Population structure and shell dimension of the invasive veined whelk (Rapana venosa)","authors":"N. Kasapoğlu","doi":"10.17017/j.fish.256","DOIUrl":"https://doi.org/10.17017/j.fish.256","url":null,"abstract":"The veined whelk (Rapana venosa) is a widely known invasive species in the Black Sea. This species exerts negative impacts on the Black Sea ecosystem including destruction of bivalve, mussel and oyster populations. This study aimed to examine population structure using the length-frequency distribution and shell dimensions of R. venosa, collected from the Black Sea. A total of 506 specimens were collected from the Trabzon Coast and classified into 6 age groups using the Bhattacharya method. The Von-Bertalanffy growth parameters were calculated as L∞ = 10.29 cm, k = 0.09, t0 = 1.25 yr–1. The mortality and exploitation rates were estimated as total mortality Z = 0.51 yr–1, fishing mortality F = 0.31 yr–1, annual mortality M = 0.20 yr–1 and exploitation rate E = 0.60 yr–1. This study will help understanding the growth of R. venosa and its management.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"45 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84782253","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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