This study investigated the effects of dietary supplementation of combined black cumin (BC) and grape seed (GS) powder at different rates (0%, 1%, 2%, and 4%, respectively) on growth performance and hepatopancreas histology of third instar Turkish narrow-clawed crayfish (Pontastacus leptodactylus). A total of 180 third instar of crayfish with an initial mean weight of (0.06 g ±0.01 g) and mean length (11.0 mm ±0.01) were randomly assigned to four treatment groups with three replications in each group and at a density of 15 crayfish per replicate. Crayfish were fed an experimental diet rate of at 10% of total body weight for 84 days. Growth performance parameters were improved significantly with BC and GS powder supplementation (P<0.05), while survival rates did not differ among all groups (P>0.05). Weight gain, specific growth rate and feed conversion rate of the 1% group tended to be better than the other groups, with significant differences among groups (P<0.05). The number and volume of B cells increased significantly with the increase in the amount of (BC and GS) added to the feed (1, 2, and 4%) in the hepatopancreas. In addition, it was determined that the R cells, which absorb nutrients, are dense in the hepatopancreas tissue of the crayfish fed with 1% (BC and GS) added feed compared to the other groups. The results showed that dietary supplementation of 1% BC and GS could benefit third-instar crayfish's growth and histological data. Therefore, combining BS and GS can be recommended as a promising new feed additive for narrow-clawed crayfish culture.
{"title":"Effects of black cumin and grape powder mix on growth performance and hepatopancreas histology in third instars of Pontastacus leptodactylus","authors":"Y. Mazlum, Metin Yazıcı, Ç. Ürkü, S. Bahadır Koca","doi":"10.3153/ar23017","DOIUrl":"https://doi.org/10.3153/ar23017","url":null,"abstract":"This study investigated the effects of dietary supplementation of combined black cumin (BC) and grape seed (GS) powder at different rates (0%, 1%, 2%, and 4%, respectively) on growth performance and hepatopancreas histology of third instar Turkish narrow-clawed crayfish (Pontastacus leptodactylus). A total of 180 third instar of crayfish with an initial mean weight of (0.06 g ±0.01 g) and mean length (11.0 mm ±0.01) were randomly assigned to four treatment groups with three replications in each group and at a density of 15 crayfish per replicate. Crayfish were fed an experimental diet rate of at 10% of total body weight for 84 days. Growth performance parameters were improved significantly with BC and GS powder supplementation (P<0.05), while survival rates did not differ among all groups (P>0.05). Weight gain, specific growth rate and feed conversion rate of the 1% group tended to be better than the other groups, with significant differences among groups (P<0.05). The number and volume of B cells increased significantly with the increase in the amount of (BC and GS) added to the feed (1, 2, and 4%) in the hepatopancreas. In addition, it was determined that the R cells, which absorb nutrients, are dense in the hepatopancreas tissue of the crayfish fed with 1% (BC and GS) added feed compared to the other groups. The results showed that dietary supplementation of 1% BC and GS could benefit third-instar crayfish's growth and histological data. Therefore, combining BS and GS can be recommended as a promising new feed additive for narrow-clawed crayfish culture.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"22 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86499629","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}
Y. Alparslan, Cansu Metin, Servet Emiroğlu, T. Baygar
This study aimed to determine the quality changes and shelf life of raw and steam-cooked blue crab meat caught in the DALKO Fisheries Cooperative processing plant in the Köyceğiz Dalyan region. Both fresh and cooked crabs were taken from DALKO Fisheries Cooperative and brought to the laboratory under cold chain conditions. After the initial analyses (sensory, chemical, microbiological, and nutrient content) were made for the fresh and cooked blue crabs, the remaining samples were shrink packed. Packaged samples were kept under refrigerator (+/- 4ºC ±1) conditions and shelf-life analyses were carried out during cold storage. The results determined fresh and cooked crabs' initial nutritional values (protein, lipid, moisture, ash) as 16.22%, 1.06%, 81.17%, 1.45%, and 17.13%, 0.94%, 79.88%, 1.88%, respectively. At the end of storage, these values were determined as 15.88%, 1.51%, 80.18%, 1.67%, and 17.83%, 1.06%, 78.65%, and 2.13% for fresh and cooked crabs, respectively. According to the sensory and microbiological analysis results, the consumable limit values were exceeded on the sixth day for fresh samples and the eighth day for cooked samples. When sensory and microbiological analyses were considered, it was determined that the fresh crabs have a shelf life of 4 days and cooked crabs have six days in vacuum-packaged refrigerator conditions.
{"title":"Investigating the quality changes and shelf life of vacuum shrink-packaged raw and steam-cooked blue crabs under cold storage","authors":"Y. Alparslan, Cansu Metin, Servet Emiroğlu, T. Baygar","doi":"10.3153/ar23012","DOIUrl":"https://doi.org/10.3153/ar23012","url":null,"abstract":"This study aimed to determine the quality changes and shelf life of raw and steam-cooked blue crab meat caught in the DALKO Fisheries Cooperative processing plant in the Köyceğiz Dalyan region. Both fresh and cooked crabs were taken from DALKO Fisheries Cooperative and brought to the laboratory under cold chain conditions. After the initial analyses (sensory, chemical, microbiological, and nutrient content) were made for the fresh and cooked blue crabs, the remaining samples were shrink packed. Packaged samples were kept under refrigerator (+/- 4ºC ±1) conditions and shelf-life analyses were carried out during cold storage. The results determined fresh and cooked crabs' initial nutritional values (protein, lipid, moisture, ash) as 16.22%, 1.06%, 81.17%, 1.45%, and 17.13%, 0.94%, 79.88%, 1.88%, respectively. At the end of storage, these values were determined as 15.88%, 1.51%, 80.18%, 1.67%, and 17.83%, 1.06%, 78.65%, and 2.13% for fresh and cooked crabs, respectively. According to the sensory and microbiological analysis results, the consumable limit values were exceeded on the sixth day for fresh samples and the eighth day for cooked samples. When sensory and microbiological analyses were considered, it was determined that the fresh crabs have a shelf life of 4 days and cooked crabs have six days in vacuum-packaged refrigerator conditions.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"43 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81590169","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}
Coccidia is a spore-forming obligate intracellular protozoan parasite that causes disease in many fish species. This study aimed to diagnose a parasitic disease case that affected a common pandora (Pagellus erythrinus) with a high mortality rate. The samples prepared from the internal organs of the diseased fish and the gills and muscle tissues were examined parasitologically using histological methods, a light microscope, and Transmission Electron Microscopy (TEM). No parasites or parasitic formations were found in the wet mount preparations. The presence of parasitic spores (1-1,5 x 0.3-0.7 μm) was detected towards the intestinal tissue between the intestinal microvilli of fish in the electron microscopy study. On the other hand, histological examination showed that a cystic structure full of spores (sporocyst) 550-750 μm in size developed in the abdominal muscles of the infected fish. At the same time, there were no such structures in the intestines. As a result, since the parasite spores observed in the diseased fish are very small, they settle in the cell and pass through the intestines by forming cysts in the abdominal muscles. They were identified as Coccidian sp. because of their similar morphology to those of the parasites in the Coccidian group. Coccidian infestation was detected in this fish species for the first time in this study. However, detecting the spores' entrance through the fish's intestines in the early stage and observing a small number of sporocyst structures suggest that the disease is in the development stage.
球虫是一种形成孢子的专性细胞内原生动物寄生虫，在许多鱼类中引起疾病。本研究旨在诊断一种高死亡率的常见潘朵拉(Pagellus erythrinus)寄生虫病病例。采用组织学方法、光学显微镜和透射电子显微镜(TEM)对病鱼的内脏、鳃和肌肉组织进行了寄生虫学检查。湿mount制剂中未发现寄生虫或寄生层。电镜下观察到寄生孢子(1-1,5 x 0.3-0.7 μm)在鱼类肠道微绒毛之间的肠组织中存在。另一方面，组织学检查显示，在感染鱼的腹肌中出现了一个充满孢子的囊状结构(孢子囊)，大小为550 ~ 750 μm。与此同时，肠道中没有这种结构。结果，由于在病鱼中观察到的寄生虫孢子非常小，它们在细胞中沉淀，并通过腹肌形成囊肿通过肠道。由于它们的形态与球虫属寄生虫相似，因此被鉴定为球虫属。本研究首次在该鱼种中检测到球虫侵染。然而，在早期检测到孢子通过鱼肠的入口，并观察到少量的孢子囊结构，表明疾病处于发展阶段。
{"title":"Coccidian infestation in cultured common pandora (Pagellus erythrinus)","authors":"Tülay Akaylı, Çiğdem Ürkü","doi":"10.3153/ar23023","DOIUrl":"https://doi.org/10.3153/ar23023","url":null,"abstract":"Coccidia is a spore-forming obligate intracellular protozoan parasite that causes disease in many fish species. This study aimed to diagnose a parasitic disease case that affected a common pandora (Pagellus erythrinus) with a high mortality rate. The samples prepared from the internal organs of the diseased fish and the gills and muscle tissues were examined parasitologically using histological methods, a light microscope, and Transmission Electron Microscopy (TEM). No parasites or parasitic formations were found in the wet mount preparations. The presence of parasitic spores (1-1,5 x 0.3-0.7 μm) was detected towards the intestinal tissue between the intestinal microvilli of fish in the electron microscopy study. On the other hand, histological examination showed that a cystic structure full of spores (sporocyst) 550-750 μm in size developed in the abdominal muscles of the infected fish. At the same time, there were no such structures in the intestines. As a result, since the parasite spores observed in the diseased fish are very small, they settle in the cell and pass through the intestines by forming cysts in the abdominal muscles. They were identified as Coccidian sp. because of their similar morphology to those of the parasites in the Coccidian group. Coccidian infestation was detected in this fish species for the first time in this study. However, detecting the spores' entrance through the fish's intestines in the early stage and observing a small number of sporocyst structures suggest that the disease is in the development stage.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136259745","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 degradation of watersheds due to urban development increases the vulnerability of surface waters to pollutants of anthropogenic origin. Urban streams draining near swimming waters can contribute significantly to the deterioration of water quality. In the study, the microbial quality of the Terme River was investigated seasonally by collecting samples from four different stream sites. Microbiological analyzes were performed using standard methods with membrane filtration. The colony-forming unit (CFU) method determined fecal contamination in samples. The mean number of colonies in Terme River water samples was determined as 712 CFU/100 mL, 278 CFU/100 mL, and 64 CFU/100 mL for total coliform, Escherichia coli, and Clostridium perfringens, respectively. This situation indicates that there was fecal contamination in the stream. According to the bacteriological parameters in the Water Pollution Control Regulation, Terme River was found to be of class II water quality in terms of total coliform bacteria count. The Research results determined that the Terme River is not much polluted in terms of microbiological quality but has values under the pressure of pollution. To not increase the pollution level, the direct mixing of domestic wastes/wastewater, animal wastes, and drainage channels from the settlements and agricultural areas around the river should be prevented. The public should be made aware of the necessary precautions.
{"title":"Evaluation of spatio-temporal variations in microbial pollution indicators of a river passing through lowlands and urban areas in Northern Türkiye","authors":"B. Taş, Halim Topaldemir, F. Ustaoğlu, Z. Koloren","doi":"10.3153/ar23014","DOIUrl":"https://doi.org/10.3153/ar23014","url":null,"abstract":"The degradation of watersheds due to urban development increases the vulnerability of surface waters to pollutants of anthropogenic origin. Urban streams draining near swimming waters can contribute significantly to the deterioration of water quality. In the study, the microbial quality of the Terme River was investigated seasonally by collecting samples from four different stream sites. Microbiological analyzes were performed using standard methods with membrane filtration. The colony-forming unit (CFU) method determined fecal contamination in samples. The mean number of colonies in Terme River water samples was determined as 712 CFU/100 mL, 278 CFU/100 mL, and 64 CFU/100 mL for total coliform, Escherichia coli, and Clostridium perfringens, respectively. This situation indicates that there was fecal contamination in the stream. According to the bacteriological parameters in the Water Pollution Control Regulation, Terme River was found to be of class II water quality in terms of total coliform bacteria count. The Research results determined that the Terme River is not much polluted in terms of microbiological quality but has values under the pressure of pollution. To not increase the pollution level, the direct mixing of domestic wastes/wastewater, animal wastes, and drainage channels from the settlements and agricultural areas around the river should be prevented. The public should be made aware of the necessary precautions.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"102 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80626191","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 recent years, phenotypic identification kits have been reported to give incorrect results in identifying Aeromonas species, whereas molecular identification is quite reliable. In this context, Aeromonas hydrophila strains, isolated from fish farms (9 strains), identified by polymerase chain reaction (PCR) method, and ATCC strain bacteria were used in the present study for the determination of the usability of API 20NE and Microgen GN-ID A + B panel test kits. All strains were determined as A. hydrophila in molecular methods. After phenotypic identification, a 100% accuracy rate was obtained for A. hydrophila with API 20NE. In the Microgen GN-ID A + B, these rates were 60% for the strains used in this study. Phenotypic identification for the ATCC strain in both kits was correct. This study showed that the API 20NE test kit had high validation for the rapid and correct identification of fish pathogenic A. hydrophila.
近年来，据报道，表型鉴定试剂盒在鉴定气单胞菌种类时给出了不正确的结果，而分子鉴定是相当可靠的。在此背景下，本研究采用聚合酶链反应(PCR)方法鉴定了从养鱼场分离的嗜水气单胞菌菌株(9株)和ATCC菌株，以确定API 20NE和Microgen GN-ID A + B面板检测试剂盒的可用性。所有菌株经分子鉴定均为嗜水单胞菌。表型鉴定后，API 20NE对嗜水单胞菌的检测准确率达到100%。在Microgen GN-ID A + B中，本研究中使用的菌株的这些比率为60%。两种试剂盒对ATCC菌株的表型鉴定均正确。本研究表明，API 20NE检测试剂盒对鱼类致病性嗜水单胞菌的快速、正确鉴定具有较高的验证性。
{"title":"Comparison of the efficacy of two phenotypic identification kits and classic PCR methods to identify Aeromonas hydrophila isolated from fish farms","authors":"Şerafettin Balcı, Z. Ipek, A. Er, Ş. Kayış","doi":"10.3153/ar23013","DOIUrl":"https://doi.org/10.3153/ar23013","url":null,"abstract":"In recent years, phenotypic identification kits have been reported to give incorrect results in identifying Aeromonas species, whereas molecular identification is quite reliable. In this context, Aeromonas hydrophila strains, isolated from fish farms (9 strains), identified by polymerase chain reaction (PCR) method, and ATCC strain bacteria were used in the present study for the determination of the usability of API 20NE and Microgen GN-ID A + B panel test kits. All strains were determined as A. hydrophila in molecular methods. After phenotypic identification, a 100% accuracy rate was obtained for A. hydrophila with API 20NE. In the Microgen GN-ID A + B, these rates were 60% for the strains used in this study. Phenotypic identification for the ATCC strain in both kits was correct. This study showed that the API 20NE test kit had high validation for the rapid and correct identification of fish pathogenic A. hydrophila.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"32 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88736974","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}
Devrim Memiş, Gökhan Tunçelli, Merve Tınkır, Mehmet Hakan Erk
We investigated the effects of growth performance of three plant species parsley (Petroselinum crispum), lettuce (Lactuca sativa) and cress (Lepidium sativum) under the three different lighting sources, Light-Emitting Diode lamp (LED; 200w), High-Pressure Sodium lamp (HPS; 200w) and Fluorescent lamp (FLO; 200w) in an aquaponic system. A total number of 43 koi fish (Cyprinus carpio var. koi) with 3628 g total biomass (84.4 g per individual) were used. The fish used in the experiment recorded 36% growth and reached an average individual weight of 132.7 g at the end of the experiment. The parsley plant was measured as 8.76 ±7.32 g; 7.45 ±4.13 g; 2.04 ±1.96 g weight after 45 days, the lettuce plant was 54.09 ± 25.60 g; 60.83 ±19.39 g; 17.81 ±6.40 g weight after 54 days, cress plant was 1.03 ±0.58 g; 1.15 ±0.46 g; 1.31 ±0.58 g weight after 42 days, under the HPS, LED, and FLO light sources, respectively. HPS and LED light sources in lettuce and parsley showed better plant development than the FLO, while no significant difference occurred in cress plants under three light conditions. We conclude that using HPS or LED lights in indoor aquaponics has the potential to produce good quality and adequate amounts of plants.
{"title":"Investigation of different lighting (LED, HPS and FLO) in aquaponics systems for joint production of different plants (Lettuce, Parsley and Cress) and koi carp","authors":"Devrim Memiş, Gökhan Tunçelli, Merve Tınkır, Mehmet Hakan Erk","doi":"10.3153/ar23005","DOIUrl":"https://doi.org/10.3153/ar23005","url":null,"abstract":"We investigated the effects of growth performance of three plant species parsley (Petroselinum crispum), lettuce (Lactuca sativa) and cress (Lepidium sativum) under the three different lighting sources, Light-Emitting Diode lamp (LED; 200w), High-Pressure Sodium lamp (HPS; 200w) and Fluorescent lamp (FLO; 200w) in an aquaponic system. A total number of 43 koi fish (Cyprinus carpio var. koi) with 3628 g total biomass (84.4 g per individual) were used. The fish used in the experiment recorded 36% growth and reached an average individual weight of 132.7 g at the end of the experiment. The parsley plant was measured as 8.76 ±7.32 g; 7.45 ±4.13 g; 2.04 ±1.96 g weight after 45 days, the lettuce plant was 54.09 ± 25.60 g; 60.83 ±19.39 g; 17.81 ±6.40 g weight after 54 days, cress plant was 1.03 ±0.58 g; 1.15 ±0.46 g; 1.31 ±0.58 g weight after 42 days, under the HPS, LED, and FLO light sources, respectively. HPS and LED light sources in lettuce and parsley showed better plant development than the FLO, while no significant difference occurred in cress plants under three light conditions. We conclude that using HPS or LED lights in indoor aquaponics has the potential to produce good quality and adequate amounts of plants.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"65 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76057416","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 examine the effects of some physicochemical parameters on the zoobenthic community structure in Porsuk Stream, seasonal zoobenthic samples were collected from 6 stations between 2020-2021, and some physicochemical parameters were also measured. Within the scope of the study, a total of 30 families, 4 from the Gastropoda, 1 from the Bivalvia, 3 from the Clitellata, and 22 from the Insecta, were identified. Families Tubificidae, Erpobdellidae, and Chironomidae were identified at each station. Dominant groups in Porsuk Stream zoobenthos; Tubificidae (41.90 %), Chironomidae (16.68 %), Gammaridae (7.84), Valvatidae (6.16 %), Naididae (5.30 %), Asellidae (3.73 %), Physidae (% 3.48 %), Dreissenidae (3.16 %), Baetidae (3.07 %), Simuliidae (1.70 %), Erpobdellidae (1.69%) and Lymnaeidae (1.32 %), respectively. The highest dissolved oxygen value was measured in the Sobran Stream with an average of 11.3 mg/L. Detection of Caenidae from Ephemeroptera and Hydropsychidae from Trichoptera with low tolerance to pollution and results of the Canonical Correspondence Analysis in this station shows that dissolved oxygen concentration is effective on the distribution of taxa determined in the basin. At the same time, this station has the highest BMWP (64) and Shannon (2.22) values.
{"title":"Investigation of the effects of some environmental variables on the zoobenthic community structure: The case of Porsuk Stream (Sakarya River, Türkiye)","authors":"Deniz Mercan","doi":"10.3153/ar23006","DOIUrl":"https://doi.org/10.3153/ar23006","url":null,"abstract":"In order to examine the effects of some physicochemical parameters on the zoobenthic community structure in Porsuk Stream, seasonal zoobenthic samples were collected from 6 stations between 2020-2021, and some physicochemical parameters were also measured. Within the scope of the study, a total of 30 families, 4 from the Gastropoda, 1 from the Bivalvia, 3 from the Clitellata, and 22 from the Insecta, were identified. Families Tubificidae, Erpobdellidae, and Chironomidae were identified at each station. Dominant groups in Porsuk Stream zoobenthos; Tubificidae (41.90 %), Chironomidae (16.68 %), Gammaridae (7.84), Valvatidae (6.16 %), Naididae (5.30 %), Asellidae (3.73 %), Physidae (% 3.48 %), Dreissenidae (3.16 %), Baetidae (3.07 %), Simuliidae (1.70 %), Erpobdellidae (1.69%) and Lymnaeidae (1.32 %), respectively. The highest dissolved oxygen value was measured in the Sobran Stream with an average of 11.3 mg/L. Detection of Caenidae from Ephemeroptera and Hydropsychidae from Trichoptera with low tolerance to pollution and results of the Canonical Correspondence Analysis in this station shows that dissolved oxygen concentration is effective on the distribution of taxa determined in the basin. At the same time, this station has the highest BMWP (64) and Shannon (2.22) values.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"1 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74742144","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}
C. S. Alofa, Isabella Yasmine Olodo, Mouhamed Chabi Kpéra Orou Nari, Y. Abou
A 56-day feeding trial was undertaken to assess the ef-fects of housefly maggots (HM) forms (dried and fresh) as protein sources on growth, feed efficiency, and body indices of Oreo-chromis niloticus finger-lings. A control diet (T0) contained 300 g/kg of fish-meal (without HM). Two practical diets with the same formula were prepared with dried HM (T1) and fresh HM (T2) where 66 % of the fishmeal was replaced. Di-ets were fed to triplicate groups of tilapia (mean ini-tial weight: 10.26 ±0.12 g). There was no difference in survival, condition factor, feed conversion ratio, and protein efficiency ratio. Fish fed diets T0 and T1 had sig-nificantly increased (P < 0.05) mean final weight (50.25 ±1.39 - 52.24 ±1.03 g), specific growth rate (2.84 ±0.03 - 2.88 ±0.03 %/day) and weight gain (389.70 ±7.63 - 402.78 ±8.16 %) compared to T2 diet ones (46.30 ±2.03 g; 2.67 ±0.07 %/day and 356.70 ±7.76 % respective-ly). Viscerosomatic and hepatosomatic index in fish fed T1 and T2 diets were significantly higher than those fed T0. The present findings indicate that the dried form of housefly maggot has given the best results in terms of growth compared to the live form. However, housefly forms did not affect feed efficien-cy parameters.
{"title":"Effects of the fresh and dried housefly (Musca domestica) larvae in the diets of Nile tilapia Oreochromis niloticus (Linnaeus, 1758): growth, feed utilization efficiency, body composition and biological indices","authors":"C. S. Alofa, Isabella Yasmine Olodo, Mouhamed Chabi Kpéra Orou Nari, Y. Abou","doi":"10.3153/ar23001","DOIUrl":"https://doi.org/10.3153/ar23001","url":null,"abstract":"A 56-day feeding trial was undertaken to assess the ef-fects of housefly maggots (HM) forms (dried and fresh) as protein sources on growth, feed efficiency, and body indices of Oreo-chromis niloticus finger-lings. A control diet (T0) contained 300 g/kg of fish-meal (without HM). Two practical diets with the same formula were prepared with dried HM (T1) and fresh HM (T2) where 66 % of the fishmeal was replaced. Di-ets were fed to triplicate groups of tilapia (mean ini-tial weight: 10.26 ±0.12 g). There was no difference in survival, condition factor, feed conversion ratio, and protein efficiency ratio. Fish fed diets T0 and T1 had sig-nificantly increased (P < 0.05) mean final weight (50.25 ±1.39 - 52.24 ±1.03 g), specific growth rate (2.84 ±0.03 - 2.88 ±0.03 %/day) and weight gain (389.70 ±7.63 - 402.78 ±8.16 %) compared to T2 diet ones (46.30 ±2.03 g; 2.67 ±0.07 %/day and 356.70 ±7.76 % respective-ly). Viscerosomatic and hepatosomatic index in fish fed T1 and T2 diets were significantly higher than those fed T0. The present findings indicate that the dried form of housefly maggot has given the best results in terms of growth compared to the live form. However, housefly forms did not affect feed efficien-cy parameters.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"83 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74184196","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}
Jorge I. Rosales-Vásquez, V. Anislado-Tolentino, Brandon Escárcega-Miranda
Echinorhinus cookei is a rare, large, demersal, deep-sea species of shark inhabitant of the Pacific Ocean basin. A sub-adult female with a total length of 262.7 cm was found naturally stranded in 2021 at Bahia de Los Angeles, Baja California, Central Gulf of California. It presents two spineless dorsal fins closer to the pelvic fins, large star-shaped dermal denticles, and distally oriented multi-cusplet cutting-type teeth. Along the shark, a peninsular coyote Canis latrans peninsulae was observed scavenging on the shark carcass. This study documents the first record of E. cookei in the Bahia de Los Angeles area and the first record of scavenging by the coyote C. latrans on any echinorhiniform shark to date.
{"title":"New record of the prickly shark Echinorhinus cookei (Pietschmann, 1928) and evidence of scavenging by the coyote Canis latrans (Say, 1823) in Bahia de Los Angeles, Baja California, Mexico","authors":"Jorge I. Rosales-Vásquez, V. Anislado-Tolentino, Brandon Escárcega-Miranda","doi":"10.3153/ar23007","DOIUrl":"https://doi.org/10.3153/ar23007","url":null,"abstract":"Echinorhinus cookei is a rare, large, demersal, deep-sea species of shark inhabitant of the Pacific Ocean basin. A sub-adult female with a total length of 262.7 cm was found naturally stranded in 2021 at Bahia de Los Angeles, Baja California, Central Gulf of California. It presents two spineless dorsal fins closer to the pelvic fins, large star-shaped dermal denticles, and distally oriented multi-cusplet cutting-type teeth. Along the shark, a peninsular coyote Canis latrans peninsulae was observed scavenging on the shark carcass. This study documents the first record of E. cookei in the Bahia de Los Angeles area and the first record of scavenging by the coyote C. latrans on any echinorhiniform shark to date.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"14 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76443774","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}
This showed a comprehensive study on the mangrove crab industry in Bataan, Philippines. Mangrove crab growers (35%) were between 51-60 years old, mostly married with 5-7 family members. Farming was highest (30.77%) between 6-10 years while some were farming for 40 years (1.29%). Monthly income has strong positive correlation (r=676) with production area. Scylla serrata, S. olivacea, and S. tranquebarica were identified using traditional ecological knowledge (TEK). Results revealed 69.57% of the pond used for farming was 1-10 ha employing the polyculture method. About 52.17% used coin-sized crablets while 39.13% fly-sized. Annual production was less than a ton for 46.38% growers while 1.45% have >5 tons. Annual income showed a strong positive correlation (r=0.886 and r=0.815) with production area and annual production, showing a significant difference (p<001). Harvested crabs were marketed live in Orani Port. Grading and pricing were due to sex, weight, and characteristics. Problems include the implementation of FAO 264 s. 2020, weather, market practice, pandemic, and high rejections. Men and women play significant roles where laborious were perceived to be men’s sphere while less laborious and financial aspects were for women.
这是对菲律宾巴丹岛红树林蟹业的全面研究。红树林蟹养殖者(35%)年龄在51-60岁之间，大多已婚，有5-7名家庭成员。6 ~ 10年务农者最多(30.77%)，40年务农者最多(1.29%)。月收入与生产面积呈正相关(r=676)。利用传统生态学知识(TEK)对锡拉(Scylla serrata)、青枝锡拉(S. olivacea)和金雀花锡拉(S. tranquebarica)进行鉴定。结果表明:采用混养法养殖的池塘面积为1 ~ 10公顷，占69.57%;52.17%的人使用硬币大小的螃蟹，39.13%的人使用苍蝇大小的螃蟹。46.38%的农户年产量不足一吨，1.45%的农户年产量大于5吨。年收入与生产面积、年产量呈强正相关(r=0.886、r=0.815)，差异有统计学意义(p<001)。收获的螃蟹在奥拉尼港活卖。分级和定价取决于性别、体重和特征。问题包括执行粮农组织第264 s 2020号规定、天气、市场惯例、流行病和拒收率高。男人和女人都扮演着重要的角色，劳动被认为是男人的领域，而较少的劳动和经济方面则是妇女的领域。
{"title":"Production and marketing practices of mangrove crab industry towards sustainability in Bataan, Philippines","authors":"Madel Fernandez Damaso","doi":"10.3153/ar23004","DOIUrl":"https://doi.org/10.3153/ar23004","url":null,"abstract":"This showed a comprehensive study on the mangrove crab industry in Bataan, Philippines. Mangrove crab growers (35%) were between 51-60 years old, mostly married with 5-7 family members. Farming was highest (30.77%) between 6-10 years while some were farming for 40 years (1.29%). Monthly income has strong positive correlation (r=676) with production area. Scylla serrata, S. olivacea, and S. tranquebarica were identified using traditional ecological knowledge (TEK). Results revealed 69.57% of the pond used for farming was 1-10 ha employing the polyculture method. About 52.17% used coin-sized crablets while 39.13% fly-sized. Annual production was less than a ton for 46.38% growers while 1.45% have >5 tons. Annual income showed a strong positive correlation (r=0.886 and r=0.815) with production area and annual production, showing a significant difference (p<001). Harvested crabs were marketed live in Orani Port. Grading and pricing were due to sex, weight, and characteristics. Problems include the implementation of FAO 264 s. 2020, weather, market practice, pandemic, and high rejections. Men and women play significant roles where laborious were perceived to be men’s sphere while less laborious and financial aspects were for women.","PeriodicalId":13619,"journal":{"name":"International Aquatic Research","volume":"20 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81895565","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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