Journal of Fisheries最新文献

Production and economics of Gangetic mystus (Mystus cavasius) farming under different feed restriction periods in cages of floodplain ecosystem 河漫滩生态系统不同限饲期网箱养殖恒河墨鱼的生产与经济

Journal of Fisheries Pub Date : 2023-10-31 DOI: 10.17017/j.fish.580

Jesmin Ara, Md. Akhtar Hossain, Md. Abu Sayed Jewel, Md. Ayenuddin Haque

{"title":"Production and economics of Gangetic mystus (Mystus cavasius) farming under different feed restriction periods in cages of floodplain ecosystem","authors":"Jesmin Ara, Md. Akhtar Hossain, Md. Abu Sayed Jewel, Md. Ayenuddin Haque","doi":"10.17017/j.fish.580","DOIUrl":"https://doi.org/10.17017/j.fish.580","url":null,"abstract":"High feed cost is a major problem for the promotion of a nutrient rich fish like Gangetic mystus (Mystus cavasius) in cages under floodplain ecosystem. To address this problem, production and economics of cage farming of Gangetic mystus were evaluated under different feed restriction periods in Atrai River of Chalan Beel. Four feed restriction periods were tested in floating cages under four different treatments (T1-0 day i.e., regular feeding, T2-1 day, T3-2 days, and T4-3 days feed restriction per week). Fish were fed twice daily with commercial floating pellet containing 32% protein. Water quality parameters (water temperature, dissolved oxygen, pH and ammonia-nitrogen) were within the suitable range for fish culture. Final weight, weight gain, % weight gain, average daily gain, specific growth rate and survival rate were found significantly higher at treatment T1 whereas a better feed conversion ratio was observed in T2. Significantly higher fish production and benefit were also obtained from treatment T2. The present study concluded that Gangetic mystus with a stocking density of 50 fish m–3 fed with 32% protein containing feed maintaining 1 day feeding restriction per week are economically feasible for cage culture in running water.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135931506","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}

引用次数: 0

Reproductive biology of the silky shark Carcharhinus falciformis (Müller & Henle, 1839) in waters off Côte d’Ivoire (West Africa) 绢鲨(Carcharhinus falciformis)的生殖生物学研究亨利，1839年)在Côte科特迪瓦(西非)海域

Journal of Fisheries Pub Date : 2023-10-26 DOI: 10.17017/j.fish.503

Koua Clément N’Gouan, Kouadio Justin Konan, Kouassi Yves Narcisse Kouamé, Oi Edia Edia

{"title":"Reproductive biology of the silky shark Carcharhinus falciformis (Müller & Henle, 1839) in waters off Côte d’Ivoire (West Africa)","authors":"Koua Clément N’Gouan, Kouadio Justin Konan, Kouassi Yves Narcisse Kouamé, Oi Edia Edia","doi":"10.17017/j.fish.503","DOIUrl":"https://doi.org/10.17017/j.fish.503","url":null,"abstract":"Since 2008, the quantity and size of silky shark, Carcharhinus falciformis decrease drastically in catches of artisanal driftnet fishery operating in the coastal waters off Côte d’Ivoire. The objective of this study was to describe the reproductive biology of this species, based on 336 specimens (162 males and 174 females). The total length (TL) of males and female ranged from 81–242 and 79–254 cm respectively. The sex ratio was 0.89:1 (M:F) and 0.93:1 (M:F) in embryos and adults respectively. Males of >180 cm had calciﬁed clasper (17–35 cm) whereas females of >190 cm had oviduct gland length of 18–47 mm. The estimated length at first maturity was 182.8 cm for males and 195.2 cm for females. The range in litter size of three gravid females was 7–9, with an average of 8 embryos of 52–54.5 cm TL were collected in August and December. However, the absence of neonates and scars on females' body, as well as ovulating and differentiating females in catches does not allow a clear determination of its reproductive period in Ivorian waters and therefore, additional research including histological analysis is necessary to better understand the process of spawning of silky shark.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134907225","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}

引用次数: 0

Determining overwintering performance and economic viability of monosex tilapia fingerling production in hapa cum cage aquaculture system for Bangladesh's haor fishers 确定孟加拉haor渔民在半笼式养殖系统中单性罗非鱼鱼种生产的越冬性能和经济可行性

Journal of Fisheries Pub Date : 2023-10-26 DOI: 10.17017/j.fish.613

Shahidul Islam Bhuiya, Roni Chandra Mondal, Fozlul Kabeer, AKM Nowsad Alam

{"title":"Determining overwintering performance and economic viability of monosex tilapia fingerling production in hapa cum cage aquaculture system for Bangladesh's haor fishers","authors":"Shahidul Islam Bhuiya, Roni Chandra Mondal, Fozlul Kabeer, AKM Nowsad Alam","doi":"10.17017/j.fish.613","DOIUrl":"https://doi.org/10.17017/j.fish.613","url":null,"abstract":"Ensuring a consistent supply of uniformly sized fingerlings for tilapia cage aquaculture in Bangladesh's poses a significant challenge. This study assessed overwintering growth performance and economic viability of monosex tilapia fingerling production in haor waters. Nine hapas, each inside a designated treatment cage, were stocked with T1 (200), T2 (250) and T3 (300) tilapia fry, averaging 1.25±0.25 g, per m³ for 90 days. The most successful treatment continued for two subsequent crops over two years for economic viability assessment. Average final body weight gain was the highest at the lowest stocking density (T1, 58.86±7.23 g), but the most desirable biomass gain (222 kg cage⁻¹) occurred at medium stocking density (T2). Beyond biomass gain, T2 exhibited superior profitability, with 26% and 30% profitability in the second and third crops respectively, over total costs. In conclusion, overwintering tilapia fingerling production in the hapa-cum-cage system at a stocking density of 250 m⁻³ proved more profitable and sustainable than other treatments, offering a viable income-generating option for resource-poor haor fishers.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"33 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134905916","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}

引用次数: 0

Anaesthetic effects of different concentrations of sodium bicarbonate on common carp (Cyprinus carpio) 不同浓度碳酸氢钠对鲤鱼的麻醉作用

IF 0.7

Journal of Fisheries Pub Date : 2023-04-30 DOI: 10.17017/j.fish.425

Leah Joyce B. Gajutos, Aurelia B. Gajutos

引用次数: 0

Organoleptic qualities and proximate composition of fish grown in good aquaculture practice-based carp fattening pond 基于良好养殖规范的鲤鱼育肥池养殖鱼的感官品质和近似组成

IF 0.7

Journal of Fisheries Pub Date : 2023-04-30 DOI: 10.17017/j.fish.505

Md. Anwar Hossain, Md. Akhtar Hossain, Md. Ayenuddin Haque, Mst. Nurjahan Begum

{"title":"Organoleptic qualities and proximate composition of fish grown in good aquaculture practice-based carp fattening pond","authors":"Md. Anwar Hossain, Md. Akhtar Hossain, Md. Ayenuddin Haque, Mst. Nurjahan Begum","doi":"10.17017/j.fish.505","DOIUrl":"https://doi.org/10.17017/j.fish.505","url":null,"abstract":"Organoleptic qualities and proximate composition of fish grown in carp fattening pond were studied under three treatments of feed and fertiliser management. Treatment T1 was designed with the use of organic fertiliser and stocking of silver carp, T2 with both organic and inorganic fertilisers and silver carp and T3 with both organic and inorganic fertilisers but excluding silver carp. One day in a week feeding restriction was followed in all the treatments. Fishes were stocked with a stocking density of 2470 fishes ha–1. Three fishes (Gibelion catla, Labeo rohita and Cirrhinus cirrhosus) were selected for organoleptic and proximate assessment. Cyanobacteria along with total phytoplankton cell density was significantly higher at treatment T2 followed by T3 and T1. However, in terms of productivity (Chl-a) treatment T2 was 27.1 and 13.3% higher compared to T1 and T3 respectively. Parameters assessed for proximate composition analysis did not vary across treatments and organoleptic test revealed comparatively higher acceptability of fishes collected from treatment T1 followed by T2 and T3 for all the fishes. Overall acceptability was higher for L. rohita from treatment T1. This study concluded that, inorganic fertilisation along with silver carp can improve the organoleptic properties of carps in pond.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88643860","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}

引用次数: 0

Length-weight relationships and condition factors of mono- and mixed-sex Nile tilapia (Oreochromis niloticus) in open water cage culture system 开放式网箱养殖中单性和混合性尼罗罗非鱼的长重关系及影响因素

IF 0.7

Journal of Fisheries Pub Date : 2023-03-01 DOI: 10.17017/j.fish.431

Saznzib Kumar Barman, Bhupal Ronjon Das, M. Kunda, S. Mazumder, Md Jasim Uddin, P. P. Barman

{"title":"Length-weight relationships and condition factors of mono- and mixed-sex Nile tilapia (Oreochromis niloticus) in open water cage culture system","authors":"Saznzib Kumar Barman, Bhupal Ronjon Das, M. Kunda, S. Mazumder, Md Jasim Uddin, P. P. Barman","doi":"10.17017/j.fish.431","DOIUrl":"https://doi.org/10.17017/j.fish.431","url":null,"abstract":"The current study compared the length-weight relationships and condition factors in mono- and mixed-sex Nile tilapia (Oreochromis niloticus). The trial lasted for 91 days and included two treatments with five replications for each, all with the same stocking density. During the study period, 20 randomly selected fish individuals were measured and recorded from each cage every two weeks. The observed growth trend was allometric, with no significant difference in the mean exponential values (b), 2.696 and 2.65 for mono and mixed-sex tilapia respectively. There was a significant difference in final weight gain between monosex (171.58±7.39 g) and mixed-sex (149.09±4.14 g) tilapia. There was no significant difference in final length between monosex (19.80±0.42 cm) and mixed-sex (19.80±0.42 cm) tilapia. Moreover, the mean correlation coefficient (r2) of both groups was positive. The Fulton condition factor (K) also varies from 0.700 to 1.000 (monosex) and 1.000 to 1.010 (mixed-sex). The relative condition factor (Kn) for monosex and mixed-sex tilapia ranged from 1.96 to 2.222 and 2.092 to 2.35 respectively, indicated good aquaculture conditions. The present findings will attract fish farmers to mixed-sex tilapia culture by allowing them to lessen hormone administration and expected to boost national fish production through open water cage aquaculture.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"28 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83856195","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}

引用次数: 1

Prebiotic potential of Azolla pinnata (R.Br.) and dietary inclusion effect of pulverised azolla on the growth performance of milkfish fingerlings 凤尾花的益生元潜力及饲料中添加凤尾花粉对目鱼鱼种生长性能的影响

IF 0.7

Journal of Fisheries Pub Date : 2023-02-08 DOI: 10.17017/j.fish.384

C. P. P. de la Cruz, Leendel Paul B. Alap, E. Manalili, R. Rafael, P. D. H. Tolentino

{"title":"Prebiotic potential of Azolla pinnata (R.Br.) and dietary inclusion effect of pulverised azolla on the growth performance of milkfish fingerlings","authors":"C. P. P. de la Cruz, Leendel Paul B. Alap, E. Manalili, R. Rafael, P. D. H. Tolentino","doi":"10.17017/j.fish.384","DOIUrl":"https://doi.org/10.17017/j.fish.384","url":null,"abstract":"The growth of the aquaculture sector leads to a demand for sustainable feed ingredients. Prebiotics are potential sustainable feed ingredients that can promote the improved performance of aquaculture species without the use of antimicrobials. This study investigated the potential of Azolla pinnata as a candidate prebiotic source. Prebiotic characteristics and dietary effect of commercial diet (CD) with varying pulverised azolla (PA) inclusion was evaluated. Results showed that PA (9.40% moisture) constitutes around 16.1% ash, 22.3% crude fibre, 20.9% crude protein, 1.7% crude fat and 29.6% nitrogen-free extract. Crude xylan and cellulose content of PA were 13.7% and 12.6% dry matter (DM) respectively. Growth of Lactobacillus rhamnosus in PA-supplemented MRS broth remarkably improved after 4 to 6 hours of incubation. Feeding trials results revealed that PA inclusion had no adverse effect on average survival of milkfish fingerlings, albeit significant improvement (p < 0.01) was noted in group fed with 2% PA-replaced CD in terms of the total weight gain (119.9%), specific growth rate (2.62% day–1) and feed efficiency (79.9%). The present study demonstrated the prebiotic activity of PA, as well as its potential use as dietary feed component for improved growth and feed efficiency of cultured milkfish.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"5 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87382857","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}

引用次数: 0

The morphometric, meristic and genetic characteristics of European sprat (Sprattus sprattus) in the Black Sea 黑海欧洲Sprattus Sprattus的形态、分生和遗传特征

IF 0.7

Journal of Fisheries Pub Date : 2023-02-08 DOI: 10.17017/j.fish.476

S. Ilhan, Z. Düzgüneş, N. Kasapoğlu

引用次数: 0

Effect of emodin on growth performance, antioxidant status, intestinal morphology and heat shock protein gene expressions of freshwater prawn (Macrobrachium rosenbergii) 大黄素对罗氏沼虾生长性能、抗氧化状态、肠道形态及热休克蛋白基因表达的影响

IF 0.7

Journal of Fisheries Pub Date : 2022-12-31 DOI: 10.17017/j.fish.436

D. Tadese, Gashaw Tesfaye, Metekia Tamiru, Lishan Alemu, F. Geda

{"title":"Effect of emodin on growth performance, antioxidant status, intestinal morphology and heat shock protein gene expressions of freshwater prawn (Macrobrachium rosenbergii)","authors":"D. Tadese, Gashaw Tesfaye, Metekia Tamiru, Lishan Alemu, F. Geda","doi":"10.17017/j.fish.436","DOIUrl":"https://doi.org/10.17017/j.fish.436","url":null,"abstract":"The purpose of this study was to assess the effect of emodin on biochemical variables, antioxidant activity, heat shock protein gene expression and prawn intestinal morphology (Macrobrachium rosenbergii). Three feeds containing 0 mg kg–1 (T1, control group), 25 mg kg–1 (T2) and 50 mg kg–1 (T3) of emodin were formulated and fed for eight weeks. Alanine aminotransferase, total cholesterol and triglyceride contents were significantly lowered although glucose tended to increase following the emodin remedy. Superoxide dismutase variables in haemolymph were dramatically upgraded, whilst malondialdehyde and superoxide anion situations were significantly lowered when compared to control. Emodin supplementation had no influence on glutathione peroxidase contents. Emodin remedy dropped the expression of HSP60 and HSP90 genes in comparison to the control. In T2, the intestinal epithelial cells were complete, well-organised and tightly affixed to the basement membrane, in discrepancy to the slightly disunited basement membrane in the control group. The emodin-treated prawn individuals had a thicker and full intestinal morphology than the control groups. Supplementation with emodin at dosages of 25 mg kg–1 improved growth performance, blood biochemical, antioxidant capacity and immune gene expression.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"240 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80469695","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}

引用次数: 0

Molecular characterisation and genetic analysis of aerolysin and haemolysin in Aeromonas hydrophila isolated from diseased Labeo rohita by polymerase chain reaction 聚合酶链反应分离的嗜水气单胞菌气溶素和溶血素的分子特征及遗传分析

IF 0.7

Journal of Fisheries Pub Date : 2022-12-13 DOI: 10.17017/j.fish.466

F. Sughra, M. Hafeez-ur-Rehman, F. Abbas, I. Altaf, Zohal Hassan, A. Bhatti, Kashif Ali

引用次数: 1