Journal of Fisheries最新文献_第7页

Fish stock demographics of skipjack tuna (Katsuwonus pelamis) from Kavaratti in Lakshadweep, Southern Arabian Sea 南阿拉伯海Lakshadweep Kavaratti鲣鱼(Katsuwonus pelamis)的鱼类种群统计

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Journal of Fisheries Pub Date : 2020-12-13 DOI: 10.17017/j.fish.273

A. I. Muhsin, P. S. Shahul Hameed, Pathummathada Pookoya, M. Harikrishnan, K. Ranjeet

{"title":"Fish stock demographics of skipjack tuna (Katsuwonus pelamis) from Kavaratti in Lakshadweep, Southern Arabian Sea","authors":"A. I. Muhsin, P. S. Shahul Hameed, Pathummathada Pookoya, M. Harikrishnan, K. Ranjeet","doi":"10.17017/j.fish.273","DOIUrl":"https://doi.org/10.17017/j.fish.273","url":null,"abstract":"Marine fish stocks are depleting at an alarming rate. Skipjack tuna, Katsuwonus pelamis has been exploited in Lakshadweep Island area in the Indian Ocean mainly by pole and line fishery which constituted one-third of its production in the country. Age, growth, demographics and stock assessment of this species were investigated from the Lakshadweep waters. The von Bertalanffy growth factors were estimated as asymptotic length 72.5 cm, growth constant 0.480 and the theoretical age at zero-length as –0.1097. This study showed that skipjack grows from 30 to 68.26 cm from first to sixth year. The natural mortality, fishing mortality and total mortality were 0.82, 1.51 and 2.33 respectively. The exploitation ratio was 0.65, while the exploitation which maximises relative yield per recruit (Emax) was 1.0. Recruitment pattern showed that young recruits entered the fishing grounds in most months, with peaks during June–July. Length based Virtual Population Analysis indicated that the major loss in its stock up to 22 cm was due to natural causes. At the same time, higher fishing mortality was registered in 40–60 cm length group. The present study provides knowledge on the demographics of K. pelamis, pertinent for formulating an effective fisheries management in the region.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"37 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90612171","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: 3

Size at maturity, maturity stages, and sex ratio of Micropterus salmoides (Lacepède, 1802) in Zimbabwe’s largest inland reservoir, Tugwi Mukosi: a baseline study 在津巴布韦最大的内陆水库Tugwi Mukosi中，成熟时的大小、成熟期和小鳞虾的性别比例(lacep<e:1>， 1802年):基线研究

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Journal of Fisheries Pub Date : 2020-12-09 DOI: 10.17017/j.fish.265

Terence Magqina, Alfred Mhere

{"title":"Size at maturity, maturity stages, and sex ratio of Micropterus salmoides (Lacepède, 1802) in Zimbabwe’s largest inland reservoir, Tugwi Mukosi: a baseline study","authors":"Terence Magqina, Alfred Mhere","doi":"10.17017/j.fish.265","DOIUrl":"https://doi.org/10.17017/j.fish.265","url":null,"abstract":"Size at maturity, sex ratio and maturity stages are key population parameters that are important in fisheries management of exploited stocks as they influence survival of fish populations. The introduced largemouth bass Micropterus salmoides has successfully colonised freshwater bodies in southern Africa. In Tugwi Mukosi Dam, Zimbabwe’s largest reservoir, largemouth bass is a fish of importance as it provides tourism, food and income for the local communities. This study investigated population parameters of M. salmoides in Tugwi Mukosi Dam. The study revealed that the size at 50% sexual maturity (L50) value for male and female was 204 mm and 261 mm respectively. The logistic equation for female largemouth bass was M(L) = 1 / [1 + exp (–0.256L + 6.402)]. For male largemouth bass the logistic equation was M(L) = 1 / [1 + exp (–0.1375L + 4.129)]. The results showed that reproductive activity peaked in October. The male to female ratio was 1:1.04 which is typical of healthy populations. More research and monitoring of the population parameters of largemouth bass is needed so as to be able to predict long term effects of overexploitation and enable responsible authorities to protect the fish stock from collapsing.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"15 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77964275","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

Multiplex-PCR protocol development for rapid screening of white spot syndrome virus (WSSV) in shrimp 快速筛选对虾白斑综合征病毒(WSSV)的多重pcr方法的建立

IF 0.7

Journal of Fisheries Pub Date : 2020-11-26 DOI: 10.17017/j.fish.230

Sharmin Aktar, M. Parvez, H. Islam, M. Ahsan

{"title":"Multiplex-PCR protocol development for rapid screening of white spot syndrome virus (WSSV) in shrimp","authors":"Sharmin Aktar, M. Parvez, H. Islam, M. Ahsan","doi":"10.17017/j.fish.230","DOIUrl":"https://doi.org/10.17017/j.fish.230","url":null,"abstract":"This study was aimed to develop a faster single step multiplex PCR protocol for the simultaneous detection of white spot syndrome virus (WSSV) with its host (i.e. shrimp) as internal positive control. To do so, four combinations of primer were tested (I. 16S rRNA+Lo F1R1; II. 16S rRNA+Lo F2R2; III. 16S rRNA+Lo F1R2; IV. 16S rRNA+Lo F2R1) which were selected based on two pairs of WSSV specific primer (Lo F1R1 and Lo F2R2) and one pair of shrimp specific primer (16S rRNA). DNA extracted from WSSV infected shrimp were amplified by PCR in a single tube using each of the primer combinations and the thermal cycling conditions as well as reagent compositions were optimized. All the primer combinations yielded their expected band sizes with stronger band resolution intensity that indicated the development of four multiplex PCR protocols. The developed multiplex protocols reduced the chance of cross contamination and these were found to be faster, single step and unique with less effort and resource use. Considering sensitivity and specificity, among the protocols, we suggested the protocols based on 16S rRNA+Lo F1R1 and/or 16S rRNA+Lo F2R2 primer combinations for rapid and routine screening of WSSV in shrimp PL, juvenile and adult.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"203 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76196882","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: 5

Are haematological and biochemical properties of freshwater spotted snakehead Channa punctata (Bloch, 1793) season and sex dependent? 淡水斑点蛇头Channa punctata (Bloch, 1793)的血液学和生化特性是否依赖于季节和性别?

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Journal of Fisheries Pub Date : 2020-11-23 DOI: 10.17017/j.fish.210

Minakshi Singh, A. Kashyap, M. Serajuddin

{"title":"Are haematological and biochemical properties of freshwater spotted snakehead Channa punctata (Bloch, 1793) season and sex dependent?","authors":"Minakshi Singh, A. Kashyap, M. Serajuddin","doi":"10.17017/j.fish.210","DOIUrl":"https://doi.org/10.17017/j.fish.210","url":null,"abstract":"Freshwater murrel, Channa punctata commonly known as “spotted snakehead” is a popular fish because of its taste and price. Haematological and biochemical profile of fish helps in understanding the fish health and play an important role in fisheries management. The present work was carried out to determine season (summer, monsoon and winter) and sex dependent variations in the blood profile of C. punctata. Haematological [red blood cell counts (RBC), packed cell volume (PCV) and haemoglobin (Hb)] and serum biochemical parameters [blood glucose, total protein, cholesterol, triglyceride (Tg), low density lipoprotein (LDL), very low density lipoprotein (VLDL), high density lipoprotein (HDL), serum calcium levels] of C. punctata were analysed which varied significantly with seasons (p < 0.05). The level of glucose, total protein, Tg, VLDL, RBC, Hb and PCV was low during monsoon season because of the growth and development of gonads compared to the summer and winter season. The level of cholesterol and LDL was high during monsoon. However, haematological and biochemical parameters were not sex dependent. The seasonal haematological and biochemical variations in the fish were mainly due to the physiological acclimatisation of the fish to variations in the environmental condition and feeding regime.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"5 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90274012","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

Quality and shelf life of vacuum- and nitrogen-packed dried barb fish (Puntius spp.) 真空包装和氮包装干倒刺鱼的质量和保质期

IF 0.7

Journal of Fisheries Pub Date : 2020-09-26 DOI: 10.17017/j.fish.253

Paromita Chowdhury, Masudur Rahman, S. N. Jahan, F. Flowra, M. Islam

{"title":"Quality and shelf life of vacuum- and nitrogen-packed dried barb fish (Puntius spp.)","authors":"Paromita Chowdhury, Masudur Rahman, S. N. Jahan, F. Flowra, M. Islam","doi":"10.17017/j.fish.253","DOIUrl":"https://doi.org/10.17017/j.fish.253","url":null,"abstract":"Vacuum and modified atmosphere packaging are widely used for preserving food items including fish. In this context, the quality and shelf life of air- (control), vacuum- and nitrogen-packed dried barb fish (Puntius spp.) stored at ambient temperature were evaluated through biochemical and microbial analyses for 90 days. In most of the storage days, significantly lower values of moisture, total volatile base-nitrogen (TVB-N) and peroxide value (PV) were observed in the vacuum pack sample compared to control. However, the TVB-N, PV, total coliforms and faecal coliforms counts were within the acceptable limit in all groups. The total plate count (TPC) increased gradually with time from an initial value of 4.29 log CFUg–1. However, compared to control, significantly lower TPC were found on and after the 30th day of storage in vacuum and nitrogen pack samples. Considering the TPC value of 5 log CFUg–1, the shelf life was determined at approximately 15 days for control, 35 days for nitrogen pack and 45 days for vacuum pack samples. Therefore, the vacuum pack is considered the best packaging, which may be utilised by the processors to produce and retail the dried products with prolonged shelf life.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"9 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87197146","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

Relationship between cortisol and glucose as physiological stress indicators during growth season in juvenile Siberian sturgeon Acipenser baerii 东北鲟幼鱼生长季生理应激指标皮质醇和葡萄糖的关系

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Journal of Fisheries Pub Date : 2020-09-21 DOI: 10.17017/j.fish.191

S. Eagderi, H. Poorbagher, A. Hasanalipour, E. Çiçek

{"title":"Relationship between cortisol and glucose as physiological stress indicators during growth season in juvenile Siberian sturgeon Acipenser baerii","authors":"S. Eagderi, H. Poorbagher, A. Hasanalipour, E. Çiçek","doi":"10.17017/j.fish.191","DOIUrl":"https://doi.org/10.17017/j.fish.191","url":null,"abstract":"The relationship between cortisol and glucose was studied in two-year old farmed Siberian sturgeon Acipenser baerii with a body weight of 340±30 g (mean ± SD) and total length of 45±1 cm from August to November 2017. Thirty-six individuals were randomly selected and stocked in some 3×300 L fiberglass tanks. Blood samples were collected monthly from the tagged fish. The mean cortisol in August, September, October and November were 4.7±0.9, 23.5±3.0, 6.3±0.9 and 7.4±0.9 ng mL–1 respectively whereas glucose concentrations were 44.6±0.4, 27.3±0.6, 49.2±0.7 and 48.5±0.7 mg dL–1 respectively indicating a significant increase in cortisol and decrease in glucose in September, may be due to the exposure to prolonged high temperature (26–28.5°C). Although it was expected to happen naturally due to hyperglycemia of cortisol but no such phenomena was detected. Our results suggest that the consumption of glucose for maintenance of homeostasis and physiological status is a mechanism against the non-optimal thermal regime. This mechanism consumes glucose at a rate higher than that produced by cortisol, causing significant decrease of plasma glucose. In general, there was a reverse relationship between cortisol and glucose concentration during the experiment in Siberian sturgeons.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"15 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86540965","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

Effects of different background colors on adult spawning, egg hatchability, and larval survival of zebrafish (Danio rerio) 不同背景颜色对斑马鱼成虫产卵、卵孵化率及幼鱼存活率的影响

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Journal of Fisheries Pub Date : 2020-09-21 DOI: 10.17017/j.fish.241

Marwin B. Dela Cruz

引用次数: 1

Meristic and morphometric characteristics of the Black Sea salmon, Salmo labrax Pallas, 1814 culture line: an endemic species for Eastern Black Sea 黑海鲑鱼，Salmo labrax Pallas, 1814栽培系:黑海东部特有种的分生和形态特征

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Journal of Fisheries Pub Date : 2020-09-16 DOI: 10.17017/j.fish.250

N. Kasapoğlu, Ekrem Cem Çankırılıgil, E. Çakmak, O. Özel

引用次数: 1

Feed intake, nutrient digestibility and nutrient retention in Atlantic salmon (Salmo salar L.) fed diets with different physical pellet quality 不同物理颗粒品质饲料对大西洋鲑鱼采食量、营养物质消化率和营养物质保留率的影响

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Journal of Fisheries Pub Date : 2020-08-03 DOI: 10.17017/j.fish.133

T. S. Aas, Hanne Jorun Sixten, Marie Hillestad, T. Ytrestøyl, H. Sveier, T. Åsgård

{"title":"Feed intake, nutrient digestibility and nutrient retention in Atlantic salmon (Salmo salar L.) fed diets with different physical pellet quality","authors":"T. S. Aas, Hanne Jorun Sixten, Marie Hillestad, T. Ytrestøyl, H. Sveier, T. Åsgård","doi":"10.17017/j.fish.133","DOIUrl":"https://doi.org/10.17017/j.fish.133","url":null,"abstract":"Three feeds with different physical pellet quality but the same formulation were fed to Atlantic salmon for 97 days. Pellet quality was measured as bulk density, durability, fat leakage, hardness, water stability and porosity. The largest difference among the feeds was measured in hardness (201, 236 and 86 Newton for Diet 1, Diet 2 and Diet 3 respectively). The relative feed intake was highest in salmon fed Diet 2 and Diet 3 with no effects of pellet hardness. Growth and feed efficiency ratio were similar among all fish. The apparent digestibility of energy, dry matter, nitrogen and lipid was similar for all feeds, whereas the apparent digestibility of phosphorus and zinc was the lowest in Diet 3. Retention of energy, lipid and nitrogen was also similar for all feeds. Salmon fed Diet 1 and Diet 3 retained more phosphorus than those fed Diet 2. An increased retention of the digested zinc was found in salmon fed Diet 3. This study concludes that physical pellet quality affects feed intake and improve utilisation of feed in salmon if optimised properly. Moreover, pellet hardness can be optimised in commercial scale without compromising feed intake as it has no influence on feed intake.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"86 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73859407","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: 4

Development of a model for predicting mussel weight: a comparison of traditional and artificial intelligent methods 贻贝重量预测模型的发展:传统方法与人工智能方法的比较

IF 0.7

Journal of Fisheries Pub Date : 2020-07-27 DOI: 10.17017/j.fish.223

K. I. Uba

{"title":"Development of a model for predicting mussel weight: a comparison of traditional and artificial intelligent methods","authors":"K. I. Uba","doi":"10.17017/j.fish.223","DOIUrl":"https://doi.org/10.17017/j.fish.223","url":null,"abstract":"The relationship between length and weight is non-linear. Predictive modelling using linear regression methods subjects these variables to transformation which results in models of poor predictive value. Hence, a comparative study on developing a predictive model using traditional (length-weight relationship, LWR; multiple linear regression, MLR) and artificial intelligent (artificial neural networks, ANN) methods was conducted. Specimens (n = 320) of the horse mussel Modiolus modulaides were randomly collected from October 2018 to March 2019 at the coastal area of Dumangas, Iloilo, Philippines. Shell length, shell width and shell height were used as predictor variables for total weight. A multi-layer perceptron architecture model was used and the values were determined by the ANNs model using the actual data. In addition, LWR and MLR models were generated from the same data after log-transformation. The results indicated superiority of the ANN model to predict mussel weight to traditional LWR and MLR models. The ANNs model had the highest correlation coefficient and lowest errors among the predictive models. The ANNs model generated from this study can be a good alternative to existing models and may be useful in sustainable fisheries management.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"10 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2020-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80974358","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