Persistent Organic Pollutants (POPs) include a wide range of compounds including dichlorodiphenyltrichloroethanes’ (DDTs), hexachlorocyclohexanes (HCHs), polybrominated diphenyl ethers (PBDEs) and polychlorinated biphenyls (PCBs). These pollutants are present everywhere on earth i.e. soil, water and air. Their excessive use has adversely affected all ecosystems and their components including marine and freshwater, wildlife and human health. Although the use of POPs has been banned in many countries but they are still in use in many developing countries. This paper presents the sources and distribution of different POPs with special reference to their adverse effects and possible routes of contamination. Moreover, accumulation of these persistent pollutants in different body parts of fishes from major locations in Pakistan and its neighbouring countries (India, China and Iran) has been presented which exhibits their risk assessment for these important bioindicators of aquatic environments.
{"title":"Risk assessment of persistent organic pollutants in fishes from Pakistan and its neighbouring countries","authors":"Sehrish Kalsoom, Z. Nasreen","doi":"10.17017/j.fish.6","DOIUrl":"https://doi.org/10.17017/j.fish.6","url":null,"abstract":"Persistent Organic Pollutants (POPs) include a wide range of compounds including dichlorodiphenyltrichloroethanes’ (DDTs), hexachlorocyclohexanes (HCHs), polybrominated diphenyl ethers (PBDEs) and polychlorinated biphenyls (PCBs). These pollutants are present everywhere on earth i.e. soil, water and air. Their excessive use has adversely affected all ecosystems and their components including marine and freshwater, wildlife and human health. Although the use of POPs has been banned in many countries but they are still in use in many developing countries. This paper presents the sources and distribution of different POPs with special reference to their adverse effects and possible routes of contamination. Moreover, accumulation of these persistent pollutants in different body parts of fishes from major locations in Pakistan and its neighbouring countries (India, China and Iran) has been presented which exhibits their risk assessment for these important bioindicators of aquatic environments.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"31 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73476519","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}
Inland fisheries provide food security, livelihood and well-being to community. Fisheries management of lakes is a complex process, influenced by many drivers. In this study the driver of fisheries of lakes of Pokhara Valley were determined through interview of Jalari fishers, key informants and field visits from July 2016 to June 2017. Key drivers were illegal fishing, siltation, loss of fish habitat, water pollution and accelerated eutrophication, intensification of agriculture, biological invasion and developmental works. These drivers have played a key role in changing lake characteristics including lake size, water quality, water depth and natural food availability which subsequently affected the cage aquaculture and capture fisheries of the lake. This paper included an insight of these drivers along with strategy to mitigate them to ensure sustainable fisheries.
{"title":"Drivers of fisheries and their management in the lakes of Pokhara Valley, Nepal","authors":"Akbal Husen, T. Gurung, A. P. Nepal","doi":"10.17017/j.fish.45","DOIUrl":"https://doi.org/10.17017/j.fish.45","url":null,"abstract":"Inland fisheries provide food security, livelihood and well-being to community. Fisheries management of lakes is a complex process, influenced by many drivers. In this study the driver of fisheries of lakes of Pokhara Valley were determined through interview of Jalari fishers, key informants and field visits from July 2016 to June 2017. Key drivers were illegal fishing, siltation, loss of fish habitat, water pollution and accelerated eutrophication, intensification of agriculture, biological invasion and developmental works. These drivers have played a key role in changing lake characteristics including lake size, water quality, water depth and natural food availability which subsequently affected the cage aquaculture and capture fisheries of the lake. This paper included an insight of these drivers along with strategy to mitigate them to ensure sustainable fisheries.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"65 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80600185","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 aim of this study was to determine the composition of fatty acids of meagre (Argyrosomus regius) produced in net cages at a private company in the Aegean Sea. Regular samples were taken over the study period by random sampling for the estimation of fatty acid contents. At the end of the study, the highest mean (± SD) fatty acids in fish flesh were recorded as oleic acid (26.46 ± 0.01%), linoleic acid (20.91 ± 0.01%) and palmitic acid (15.99 ± 0.01%). Mean (± SD) total saturated (SFA), monounsaturated (MUFA) and polyunsaturated (PUFA) fatty acid values were determined as 26.17 ± 0.03%, 32.62 ± 0.03% and 31.24 ± 0.01% respectively. The total values of omega-3, omega-6, omega-9, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) were 8.73 ± 0.01 – 14.51 ± 0.04%, 18.78 ± 0.03 – 25.26 ± 0.01%, 27.12 ± 0.01 – 30.5 ± 0.01%, 1.39 ± 0.01 – 3.52 ± 0.01% and 4.24 ± 0.01 – 7.64 ± 0.01% respectively and all these values varied significantly over time (P < 0.05). Despite having a low crude fat content, the meagre could be a good source of PUFA, in terms of fatty acids.
{"title":"Determination of fatty acid composition in relation to the growth of meagre (Argyrosomus regius) cultured in net cages","authors":"B. Baki, D. Öztürk, M. Kerim","doi":"10.17017/j.fish.3","DOIUrl":"https://doi.org/10.17017/j.fish.3","url":null,"abstract":"The aim of this study was to determine the composition of fatty acids of meagre (Argyrosomus regius) produced in net cages at a private company in the Aegean Sea. Regular samples were taken over the study period by random sampling for the estimation of fatty acid contents. At the end of the study, the highest mean (± SD) fatty acids in fish flesh were recorded as oleic acid (26.46 ± 0.01%), linoleic acid (20.91 ± 0.01%) and palmitic acid (15.99 ± 0.01%). Mean (± SD) total saturated (SFA), monounsaturated (MUFA) and polyunsaturated (PUFA) fatty acid values were determined as 26.17 ± 0.03%, 32.62 ± 0.03% and 31.24 ± 0.01% respectively. The total values of omega-3, omega-6, omega-9, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) were 8.73 ± 0.01 – 14.51 ± 0.04%, 18.78 ± 0.03 – 25.26 ± 0.01%, 27.12 ± 0.01 – 30.5 ± 0.01%, 1.39 ± 0.01 – 3.52 ± 0.01% and 4.24 ± 0.01 – 7.64 ± 0.01% respectively and all these values varied significantly over time (P < 0.05). Despite having a low crude fat content, the meagre could be a good source of PUFA, in terms of fatty acids.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"101 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73634070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-06-03DOI: 10.17017/JFISH.V7I2.2019.335
M. Naveenan, R. Olsen, B. Egelandsdal
The smolt stage of salmon has challenges in reaching adequate growth rates due to the changing environmental conditions at sea. Therefore, it is necessary to provide adequate diets to achieve sufficient growth. This study determined the impacts of glutamate and succinate (1% each) supplemented diet on the growth of Atlantic salmon smolts along with characterization of mitochondrial respiration using high-resolution respirometry technique. Results indicated that there was no significant difference in growth response between the treatment and control groups. Maximum oxidative phosphorylation (OXPHOS) was reached after addition of succinate. Analysis of heart homogenates revealed a significant difference in LEAK respiration state (P = 0.005). No significant difference was recorded between the diet groups for liver homogenates. Differences between heart and liver respiration revealed that mitochondrial activity is organ dependent.
{"title":"Effects of dietary glutamate and succinate on growth performance and mitochondrial respiration in heart and liver of Atlantic salmon (Salmo salar) smolts","authors":"M. Naveenan, R. Olsen, B. Egelandsdal","doi":"10.17017/JFISH.V7I2.2019.335","DOIUrl":"https://doi.org/10.17017/JFISH.V7I2.2019.335","url":null,"abstract":"The smolt stage of salmon has challenges in reaching adequate growth rates due to the changing environmental conditions at sea. Therefore, it is necessary to provide adequate diets to achieve sufficient growth. This study determined the impacts of glutamate and succinate (1% each) supplemented diet on the growth of Atlantic salmon smolts along with characterization of mitochondrial respiration using high-resolution respirometry technique. Results indicated that there was no significant difference in growth response between the treatment and control groups. Maximum oxidative phosphorylation (OXPHOS) was reached after addition of succinate. Analysis of heart homogenates revealed a significant difference in LEAK respiration state (P = 0.005). No significant difference was recorded between the diet groups for liver homogenates. Differences between heart and liver respiration revealed that mitochondrial activity is organ dependent.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89549821","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}
Pradeep Hosahalli Divakar, V. Sasidharan, R. Kumar, S. Gopalakrishnan, Bineesh Kinattum Kara, Mahesh Kumar Farejiya
The present paper reports the first record of the parasite Eudactylina pusilla Cressey, 1967 from the gills of the pelagic thresher shark, Alopias pelagicus Nakamura, 1935 collected during a multifilament longline operation at a depth of 762 m from Indian EEZ around Andaman Islands. The occurrence of this copepod gill parasite on A. pelagicus in the Indian waters constitutes new host record and extends the parasite’s known geographical distribution, thus contributing to the knowledge of biodiversity of the parasitic copepods in Indian waters. Molecular marker based taxonomical annotation using Mitochondrial 18S r DNA sequencing also confirmed the identity of the E. pusilla specimen.
本文报道了在安达曼群岛附近印度专属经济区762米深度用多丝延绳钓法捕获的1935年Alopias pelagicus Nakamura远洋长尾鲨鳃中首次记录到的1967年puudactylina pusilla Cressey寄生虫。该桡足类鳃寄生在印度水域的A. pelagicus上，构成了新的寄主记录，扩展了该寄生虫已知的地理分布范围，有助于对印度水域桡足类寄生生物多样性的认识。基于线粒体18S r DNA测序的分子标记分类注释也证实了pusilla标本的身份。
{"title":"New host and geographical record of Eudactylina pusilla Cressey, 1967 from Indian waters with DNA barcodes","authors":"Pradeep Hosahalli Divakar, V. Sasidharan, R. Kumar, S. Gopalakrishnan, Bineesh Kinattum Kara, Mahesh Kumar Farejiya","doi":"10.17017/j.fish.4","DOIUrl":"https://doi.org/10.17017/j.fish.4","url":null,"abstract":"The present paper reports the first record of the parasite Eudactylina pusilla Cressey, 1967 from the gills of the pelagic thresher shark, Alopias pelagicus Nakamura, 1935 collected during a multifilament longline operation at a depth of 762 m from Indian EEZ around Andaman Islands. The occurrence of this copepod gill parasite on A. pelagicus in the Indian waters constitutes new host record and extends the parasite’s known geographical distribution, thus contributing to the knowledge of biodiversity of the parasitic copepods in Indian waters. Molecular marker based taxonomical annotation using Mitochondrial 18S r DNA sequencing also confirmed the identity of the E. pusilla specimen.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85697202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-03-22DOI: 10.17017/JFISH.V7I1.2019.309
Fatiha Dalouche, Lotfi Bensahla Talet, Ahmed Bensahla Talet, Sidi Mohamed El Amine Abi Ayad
The fecundity of the blotched picarel Spicara maena from the western Mediterranean (Oran Bay) was assessed by the volumetric method. Total length (TL) of studied females varied between 91 and 140 mm (mean ± SD: 111.9 ± 10.6 mm). Estimates of total potential annual fecundity varied from 16750 to 28125 oocytes per individual (mean ± SD: 21404.7 ± 2698.8). Relationships between total potential fecundity (F) and TL, total weight, gonad weight were established using the multiplicative regression model and a high significant correlation was found in all the cases.
{"title":"Fecundity of the blotched picarel, Spicara maena (Linnaeus, 1758) from Oran Bay (Western Mediterranean Sea)","authors":"Fatiha Dalouche, Lotfi Bensahla Talet, Ahmed Bensahla Talet, Sidi Mohamed El Amine Abi Ayad","doi":"10.17017/JFISH.V7I1.2019.309","DOIUrl":"https://doi.org/10.17017/JFISH.V7I1.2019.309","url":null,"abstract":"The fecundity of the blotched picarel Spicara maena from the western Mediterranean (Oran Bay) was assessed by the volumetric method. Total length (TL) of studied females varied between 91 and 140 mm (mean ± SD: 111.9 ± 10.6 mm). Estimates of total potential annual fecundity varied from 16750 to 28125 oocytes per individual (mean ± SD: 21404.7 ± 2698.8). Relationships between total potential fecundity (F) and TL, total weight, gonad weight were established using the multiplicative regression model and a high significant correlation was found in all the cases.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"23 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80924088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-03-09DOI: 10.17017/JFISH.V7I1.2019.325
Sudeshna Sarker, T. Abraham, Avijit Patra
India is the second largest fish producing nation after China, contributing about 5.68% of the global fish production. The state West Bengal is occupying the second position in freshwater fish production after Andhra Pradesh. Although a number of constraints have been put forth, diseases and poor farm management are some of the most noticeable reasons for the reduced fish production in West Bengal. This study reports the prevalence of diseases caused by Flavobacterium spp. and other opportunistic bacteria in carps of sewage-fed farms in West Bengal. The bacteriological examination of the diseased carps revealed infections with different bacterial species and most of them were opportunistic pathogens. Flavobacteriosis, aeromoniasis, pseudomoniasis and other mixed bacterial infections, as confirmed by conventional biochemical tests and by VITEK 2 Compact system, were noted frequently. Antibiotic sensitivity of the opportunistic bacterial pathogens from the diseased carps indicated that some of these bacterial strains are resistant to potential human medicines like erythromycin, cotrimoxazole, oxytetracycline, nitrofurantoin, etc., which is a serious cause for concern. These results further present the fact that sewage-fed fish farms and the food fish from such systems may pose a serious public health risk from the antibiotic-resistant bacteria, if not handled properly.
{"title":"Prevalence of diseases caused by Flavobacterium spp. and other opportunistic bacteria in carps of sewage-fed farms in West Bengal, India","authors":"Sudeshna Sarker, T. Abraham, Avijit Patra","doi":"10.17017/JFISH.V7I1.2019.325","DOIUrl":"https://doi.org/10.17017/JFISH.V7I1.2019.325","url":null,"abstract":"India is the second largest fish producing nation after China, contributing about 5.68% of the global fish production. The state West Bengal is occupying the second position in freshwater fish production after Andhra Pradesh. Although a number of constraints have been put forth, diseases and poor farm management are some of the most noticeable reasons for the reduced fish production in West Bengal. This study reports the prevalence of diseases caused by Flavobacterium spp. and other opportunistic bacteria in carps of sewage-fed farms in West Bengal. The bacteriological examination of the diseased carps revealed infections with different bacterial species and most of them were opportunistic pathogens. Flavobacteriosis, aeromoniasis, pseudomoniasis and other mixed bacterial infections, as confirmed by conventional biochemical tests and by VITEK 2 Compact system, were noted frequently. Antibiotic sensitivity of the opportunistic bacterial pathogens from the diseased carps indicated that some of these bacterial strains are resistant to potential human medicines like erythromycin, cotrimoxazole, oxytetracycline, nitrofurantoin, etc., which is a serious cause for concern. These results further present the fact that sewage-fed fish farms and the food fish from such systems may pose a serious public health risk from the antibiotic-resistant bacteria, if not handled properly.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91311237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-02-11DOI: 10.17017/JFISH.V7I1.2019.327
Sohel Rana, Md. Hasan Faruque, Mostavi Enan Eshik, Md. Rakibul Hasan, M. Rahman
Seasonal variations of proximate compositions, amino acids, and fatty acids contents of Monopterus cuchia were studied for the first time in Bangladesh. The fat and fatty acid, protein and amino acid contents showed a significant seasonal dependency. Lipid contents showed the wider variation than the protein contents. Among the 14 recorded amino acids, the primary amino acids were lysine, glutamic acid, arginine, glycine and aspartic acid. The ratio of essential and non-essential amino acids was higher in the post-monsoon season (0.69) than pre-monsoon (0.68) and monsoon season (0.68) and did not show seasonal discrepancies. The amount of fatty acids were found in order of saturated fatty acids (SFA) > mono unsaturated fatty acids (MUFA) > polyunsaturated fatty acids (PUFA). The predominant fatty acids were palmitic and stearic acids of SFAs, oleic and palmitoleic acid of MUFAs and linoleic and α linolenic acids of PUFAs group. The combined value of EPA+DHA varied from 1.44–5.34% depending on the season, with the highest in monsoon season. However, the n-6/n-3 ratios were notably lower (0.58–2.51) throughout the season than the greatest esteem of 4. Therefore, M. cuchia may be consumed as healthy as safe food with reference to n-6/n-3 ratio, irrespective of catching seasons.
{"title":"Seasonal variations in nutritional profile of the freshwater mud eel, Monopterus cuchia (Hamilton, 1822)","authors":"Sohel Rana, Md. Hasan Faruque, Mostavi Enan Eshik, Md. Rakibul Hasan, M. Rahman","doi":"10.17017/JFISH.V7I1.2019.327","DOIUrl":"https://doi.org/10.17017/JFISH.V7I1.2019.327","url":null,"abstract":"Seasonal variations of proximate compositions, amino acids, and fatty acids contents of Monopterus cuchia were studied for the first time in Bangladesh. The fat and fatty acid, protein and amino acid contents showed a significant seasonal dependency. Lipid contents showed the wider variation than the protein contents. Among the 14 recorded amino acids, the primary amino acids were lysine, glutamic acid, arginine, glycine and aspartic acid. The ratio of essential and non-essential amino acids was higher in the post-monsoon season (0.69) than pre-monsoon (0.68) and monsoon season (0.68) and did not show seasonal discrepancies. The amount of fatty acids were found in order of saturated fatty acids (SFA) > mono unsaturated fatty acids (MUFA) > polyunsaturated fatty acids (PUFA). The predominant fatty acids were palmitic and stearic acids of SFAs, oleic and palmitoleic acid of MUFAs and linoleic and α linolenic acids of PUFAs group. The combined value of EPA+DHA varied from 1.44–5.34% depending on the season, with the highest in monsoon season. However, the n-6/n-3 ratios were notably lower (0.58–2.51) throughout the season than the greatest esteem of 4. Therefore, M. cuchia may be consumed as healthy as safe food with reference to n-6/n-3 ratio, irrespective of catching seasons.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"33 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78843425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-02-10DOI: 10.17017/JFISH.V7I1.2019.332
A. Radkhah, S. Eagderi
The knifetooth sawfish Anoxypristis cuspidata (Latham, 1794) is a species of sawfish belonging to the family Pristidae. It is an Indo-West Pacific species occurring from the northern Persian Gulf to Australia and north to Japan. The species is assessed as Endangered in the IUCN Red List of Threatened Species. Main threats to the species are fishing, coastal development and habitat degradation. This sawfish species has considerable ecological importance for the regions, but there are little data of its populations. Hence, a detailed study of population status, ecological and biological characteristics of A. cuspidata is required. This study will provide basic information on distribution, biological characteristics and conservation of this species.
{"title":"Threatened fishes of the world: Anoxypristis cuspidata (Latham, 1794) (Pristidae)","authors":"A. Radkhah, S. Eagderi","doi":"10.17017/JFISH.V7I1.2019.332","DOIUrl":"https://doi.org/10.17017/JFISH.V7I1.2019.332","url":null,"abstract":"The knifetooth sawfish Anoxypristis cuspidata (Latham, 1794) is a species of sawfish belonging to the family Pristidae. It is an Indo-West Pacific species occurring from the northern Persian Gulf to Australia and north to Japan. The species is assessed as Endangered in the IUCN Red List of Threatened Species. Main threats to the species are fishing, coastal development and habitat degradation. This sawfish species has considerable ecological importance for the regions, but there are little data of its populations. Hence, a detailed study of population status, ecological and biological characteristics of A. cuspidata is required. This study will provide basic information on distribution, biological characteristics and conservation of this species.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"284 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2019-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76845596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-12-31DOI: 10.17017/JFISH.V6I3.2018.321
K. Fatema, K. Naher, K. Roy, R. Pervin
This study investigates the socio-economic conditions of the fish farmers and aquaculture status in Parbatipur of Dinajpur district during May to October 2016. Majority of the fish farmers belonged to the age group of 31 to 40 years (44.3%) and represented by 68.6% Muslims. Among them 40% had secondary level of education and most of the families were nuclear (64.3%). Farmers were involved in fish culture as their primary (24%) and secondary occupation (53%). Over 80% of the farmers had electricity facilities and 41% of them received health services from the village doctors. Only 9% of the fish farmers received formal training on fish culture. The average aquaculture pond size was 0.18 ha, where 84% ponds were perennial. The average stocking density was 23208 fingerlings ha–1 whereas organic fertilizer, urea and TSP were applied at 8665.4 kg ha–1 yr–1, 210.1 kg ha–1 yr–1 and 133.5 kg ha–1 yr–1 respectively. Pre and post stocking liming doses were 205.7 kg ha–1 yr–1 and 138.4 kg ha–1 yr–1 respectively. Necessary training facilities with institutional supports, credit facilities and extension services could play an important role in improving the fish production.
本研究于2016年5月至10月对Dinajpur地区Parbatipur养殖户的社会经济状况和水产养殖状况进行了调查。大多数养殖户年龄在31 - 40岁之间(44.3%)，穆斯林占68.6%。其中40%的人受过中等教育，大多数家庭是核心家庭(64.3%)。养鱼是农民的主要职业(24%)和次要职业(53%)。80%以上的农民有电力设施，41%的农民得到村医生的保健服务。只有9%的养鱼户接受过正规的养鱼培训。平均养殖池面积为0.18 ha，其中多年生池塘占84%。平均放养密度为23208株/ h，施用有机肥、尿素和总磷分别为8665.4 kg / h - 1年、210.1 kg / h - 1年和133.5 kg / h - 1年。放养前后石灰用量分别为205.7 kg hm - 1年和138.4 kg hm - 1年。有体制支持的必要培训设施、信贷设施和推广服务可在改善鱼类生产方面发挥重要作用。
{"title":"Pond fish culture and socio-economic status of fish farmers in Parbatipur upazila of Dinajpur district, Bangladesh","authors":"K. Fatema, K. Naher, K. Roy, R. Pervin","doi":"10.17017/JFISH.V6I3.2018.321","DOIUrl":"https://doi.org/10.17017/JFISH.V6I3.2018.321","url":null,"abstract":"This study investigates the socio-economic conditions of the fish farmers and aquaculture status in Parbatipur of Dinajpur district during May to October 2016. Majority of the fish farmers belonged to the age group of 31 to 40 years (44.3%) and represented by 68.6% Muslims. Among them 40% had secondary level of education and most of the families were nuclear (64.3%). Farmers were involved in fish culture as their primary (24%) and secondary occupation (53%). Over 80% of the farmers had electricity facilities and 41% of them received health services from the village doctors. Only 9% of the fish farmers received formal training on fish culture. The average aquaculture pond size was 0.18 ha, where 84% ponds were perennial. The average stocking density was 23208 fingerlings ha–1 whereas organic fertilizer, urea and TSP were applied at 8665.4 kg ha–1 yr–1, 210.1 kg ha–1 yr–1 and 133.5 kg ha–1 yr–1 respectively. Pre and post stocking liming doses were 205.7 kg ha–1 yr–1 and 138.4 kg ha–1 yr–1 respectively. Necessary training facilities with institutional supports, credit facilities and extension services could play an important role in improving the fish production.","PeriodicalId":55944,"journal":{"name":"Journal of Fisheries","volume":"34 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2018-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74626058","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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