Aquaculture and Fisheries Studies最新文献_第4页

Concurrent Collapses of Demersal Fish and Sea Trout (Salmo trutta) on Scotland’s West Coast Following the Removal of the “Three-Mile Fishing Limit” 取消“三英里捕鱼限制”后，苏格兰西海岸的底栖鱼类和海鳟(Salmo trutta)同时崩溃

Aquaculture and Fisheries Studies Pub Date : 2019-08-29 DOI: 10.20944/preprints201908.0306.v1

M. Jaffa

引用次数: 1

Production of Ulva Sp. in Multitrophic Aquaculture in Earth Ponds 土池多营养化养殖中Ulva Sp.的生产

Aquaculture and Fisheries Studies Pub Date : 1900-01-01 DOI: 10.31038/afs.2019111

Glauco Favot, M. E. Cunha, H. Quental-Ferreira, M. Serrão

{"title":"Production of Ulva Sp. in Multitrophic Aquaculture in Earth Ponds","authors":"Glauco Favot, M. E. Cunha, H. Quental-Ferreira, M. Serrão","doi":"10.31038/afs.2019111","DOIUrl":"https://doi.org/10.31038/afs.2019111","url":null,"abstract":"The cultivation of macroalgae in earth ponds could provide an optimal control on both quantity and quality of biomass. In previous studies the genus Ulva has proved to be an ideal candidate for growing in fish ponds since it withstands their considerable environmental fluctuations. This study assessed the biomass production and the SGR (specific growth rate) of green algae Ulva sp. cultivated in earth ponds facing the Ria Formosa lagoon (Southern Portugal). The growth and production performance were tested among: a) two different multitrophic systems (IMTA (fish +oyster + Ulva) and ‘Fish + Ulva’); b) four different initial densities (15 ,30, 50 e 60 g/m2); c) five production and harvest cycles (6, 7, 8, 9 e 15 days). The Specific Growth Rate (SGR) of Ulva sp. was found to be significantly different between the two multitrophic systems (p <0.05) and higher in the ‘Fish + Ulva’ system (19.3 ± 0.08% day-1) than in the IMTA system (16.7 ± 0.8% day-1). Also, there were significant differences between different densities and varied cultivating periods. Growth of Ulva sp. was dependent on both densities and time periods. The densities of 30g/m2 revealed to be the best among the four tested densities (23 ± 3.9 % day−1) whereas the optimal cultivating period was between seven and nine days (≈21 % day−1). The experiments on the production cycle indicated an optimal period of cultivation of about 8 days.","PeriodicalId":262559,"journal":{"name":"Aquaculture and Fisheries Studies","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116924503","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: 6

Nutrient Flow in an Integrated Rabbit–Fish–Rice System in Rwanda 卢旺达兔-鱼-米综合系统的养分流动

Aquaculture and Fisheries Studies Pub Date : 1900-01-01 DOI: 10.31038/afs.2021324

Rukera Tabaro, O. Mutanga, J. Micha

{"title":"Nutrient Flow in an Integrated Rabbit–Fish–Rice System in Rwanda","authors":"Rukera Tabaro, O. Mutanga, J. Micha","doi":"10.31038/afs.2021324","DOIUrl":"https://doi.org/10.31038/afs.2021324","url":null,"abstract":"two Abstract An analysis of nutrient flow, based on nitrogen (N) and phosphorous (P), was conducted on an integrated rabbit–fish–rice system (IRFR) system at the Rwasave Fish Farming Station (National University of Rwanda). Rabbits, stocked at 12 per are (1200 rabbits.ha -1 ) of pond, were reared over fishponds stocked with one and three male tilapia ( Oreochromis niloticus) per m 2 for pond treatments PT1 and PT2. Effluent fertilised by the rabbits was drawn away from the ponds by pipes installed at the bottom of the ponds to irrigate rice ( Oryza sativa L., variety Yuni Yin4 ) fields . There were six 400 m 2 ponds and nine 90 m 2 rice fields; three of the latter were irrigated by canal water and fertilised by NPK (200 kg.ha -1 .crop -1 , 2 applications; 100 kg.ha -1 .crop -1 , one application). The results showed that rabbit droppings supplied about 27% N and 79% P of the total N and P inputs, fertilising the ponds at a rate of 3.98 kg N and 1.94 kg P.ha -1 .d -1 . The fish recovered 18.5-7.6% N and 16.9-34.3% P of the total nitrogen (TN) and total phosphorus (TP) inputs. All water quality variables remained within good limits for tilapia aquaculture and nutrient distribution was not dependent on fish density. Large amounts of N and P accumulated in the water, sediment, and effluent fertilised rice fields at a higher rate (118.5 kg N and 27.2 kg P.ha -1 .d -1 ) than that of inorganic fertilizers, resulting in a slightly higher rice yield than that induced by NPK and urea. Tilapia effluent was thus able to substitute inorganic fertilisers completely, allowing savings to the farmers, and showing its potential as a fertiliser for fish and crop production rather than waste to be discharged, polluting the environment by its solids and organic matter component. Further studies involving a thorough analysis of nutrients lost and diversified uses of the nutrient-rich effluent are needed.","PeriodicalId":262559,"journal":{"name":"Aquaculture and Fisheries Studies","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116754373","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

A Short Note on Climate Change: An Alternative View 关于气候变化的简短说明:另一种观点

Aquaculture and Fisheries Studies Pub Date : 1900-01-01 DOI: 10.31038/afs.2021331

引用次数: 0

Biennial (2007/8) Crisis of Sarotherodon galilaeus Fishery in Lake Kinneret (Israel): A Synopsis 双年展(2007/8):以色列Kinneret湖Sarotherodon galilaeus渔业危机综述

Aquaculture and Fisheries Studies Pub Date : 1900-01-01 DOI: 10.31038/afs.2021325

M. Gophen

引用次数: 0

Biochemical Composition of Warty Crab (Eriphia verrucosa) in the Post-reproductive Period in the Black Sea 黑海疣蟹(Eriphia verrucosa)生殖后期生化组成

Aquaculture and Fisheries Studies Pub Date : 1900-01-01 DOI: 10.31038/afs.2021322

S. Dernekbaşı, İ. Karayücel, S. Karayücel

{"title":"Biochemical Composition of Warty Crab (Eriphia verrucosa) in the Post-reproductive Period in the Black Sea","authors":"S. Dernekbaşı, İ. Karayücel, S. Karayücel","doi":"10.31038/afs.2021322","DOIUrl":"https://doi.org/10.31038/afs.2021322","url":null,"abstract":"tests used of and equality The differences between using by Abstract In the study, changes in biochemical composition of warty crabs, Eriphia verrucosa between female and male individuals after the reproductive period were evaluated. The warty crabs used as study material were freshly obtained from fishermen after the breeding season (end of July). According to the data obtained in the study where the female and male individuals were evaluated separately, the average moisture, crude protein, crude lipid and crude ash contents in female E. verrucosa were 77.89%, 20.96%, 0.91% and 2.66%, respectively. In male E. verrucosa , it was found to be 76.30%, 21.44%, 0.79% and 2.47%, respectively. In the study, it was determined that the difference between male and female individuals in crude protein and crude lipid values was significant (p<0.05). Although the crude protein content was low in females, the crude lipid content was found to be higher. In other words, it was determined that while the protein ratio decreases in female individuals after the reproductive period, the lipid ratio increases. This suggests that the energy lost due to ovulation during the reproductive period may have been met by the accumulation of fat in the body.","PeriodicalId":262559,"journal":{"name":"Aquaculture and Fisheries Studies","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124918351","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

Fish Fauna of the River Ravi and Its Some Tributaries with a New Record of Ailia puncata and Clupisoma naziri for Punjab State and Union Territory of Jammu and Kashmir, India 印度旁遮普邦和查谟和克什米尔联邦领土拉维河及其部分支流的鱼类区系及新记录的Ailia puncata和Clupisoma naziri

Aquaculture and Fisheries Studies Pub Date : 1900-01-01 DOI: 10.31038/afs.2021312

Dutta Sps

引用次数: 3

Stock Assessment of the Green Sea Urchin (Strongylocentrotus droebachiensis) in Southern Breiðafjörður West Iceland Breiðafjörður冰岛西部南部绿海胆种群数量评价

Aquaculture and Fisheries Studies Pub Date : 1900-01-01 DOI: 10.31038/afs.2021323

G. Thorarinsdóttir

引用次数: 0

Invasion Potential, Impact and Population Structure of Non-native Fish Species, Cyprinus carpio (Linnaeus, 1758) from the Tributary of the Ganga River, Central India 印度中部恒河支流外来鱼类鲤鱼(Cyprinus carpio, Linnaeus, 1758)的入侵潜力、影响和种群结构

Aquaculture and Fisheries Studies Pub Date : 1900-01-01 DOI: 10.31038/afs.2021332

N. Mishra, A. Dwivedi, P. Mayank

引用次数: 2

Some Deformed Specimens of Tor tor (Ham.-Buch.) and Tor putitora (Ham.-Buch.) from the Torrential River Chenab, An Important Himalayan River, Draining Union Territory of the Jammu and Kashmir, India 印度查谟和克什米尔联邦地区重要的喜马拉雅河流切纳布河中的托尔托尔(Ham.-Buch.)和托尔普蒂托拉(Ham.-Buch.)的变形标本

Aquaculture and Fisheries Studies Pub Date : 1900-01-01 DOI: 10.31038/afs.2021313

Dutta Sps

引用次数: 1