Pub Date : 2018-01-01DOI: 10.4172/2155-9546-C2-025
pVasu Jayaprakasp
{"title":"Movement range and behavioral characteristics of red seabream by acoustical telemetry","authors":"pVasu Jayaprakasp","doi":"10.4172/2155-9546-C2-025","DOIUrl":"https://doi.org/10.4172/2155-9546-C2-025","url":null,"abstract":"","PeriodicalId":15243,"journal":{"name":"Journal of Aquaculture Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74145659","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 : 2018-01-01DOI: 10.4172/2155-9546.1000534
Bingshan Niu, Guangyao Li, Fang Peng, Jing Wu, Long Zhang, Zhenbo Li
Assessment of the behavior or physiology of cultured fish has always been difficult due to the sampling time, differences between experimental and aquaculture conditions, and methodological bias inherent. Recent developments in computer vision technology, however, have opened possibilities to better observe fish behavior. Such technology allows for non-destructive, rapid, economic, consistent, and objective inspection tools, while providing evaluation techniques based on image analysis and processing in a wide variety of applications. “Fish”, in this study, refers to underwater vertebrate fish belonging to the Pisces class that inhabit almost all available aquatic environments. This study aims to assess current, worldwide fish behavior study methods that use cameras which utilize computer vision. The evolution of computer vision as applied to fish behavior is explored in this paper for all stages of production, from hatcheries to harvest. Computer vision technology is regarded as existing from 1973 to 2018, specifically the Elsevier database. Fish behavior and underwater habitats are explored at large, especially in aquaculture fishing. Based on the methods observed above, relevant viewpoints on the present situation are presented as well as suggestions for future research directions.
{"title":"Survey of Fish Behavior Analysis by Computer Vision","authors":"Bingshan Niu, Guangyao Li, Fang Peng, Jing Wu, Long Zhang, Zhenbo Li","doi":"10.4172/2155-9546.1000534","DOIUrl":"https://doi.org/10.4172/2155-9546.1000534","url":null,"abstract":"Assessment of the behavior or physiology of cultured fish has always been difficult due to the sampling time, differences between experimental and aquaculture conditions, and methodological bias inherent. Recent developments in computer vision technology, however, have opened possibilities to better observe fish behavior. Such technology allows for non-destructive, rapid, economic, consistent, and objective inspection tools, while providing evaluation techniques based on image analysis and processing in a wide variety of applications. “Fish”, in this study, refers to underwater vertebrate fish belonging to the Pisces class that inhabit almost all available aquatic environments. This study aims to assess current, worldwide fish behavior study methods that use cameras which utilize computer vision. The evolution of computer vision as applied to fish behavior is explored in this paper for all stages of production, from hatcheries to harvest. Computer vision technology is regarded as existing from 1973 to 2018, specifically the Elsevier database. Fish behavior and underwater habitats are explored at large, especially in aquaculture fishing. Based on the methods observed above, relevant viewpoints on the present situation are presented as well as suggestions for future research directions.","PeriodicalId":15243,"journal":{"name":"Journal of Aquaculture Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82175489","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 : 2018-01-01DOI: 10.4172/2155-9546.1000538
S. Islam, M. A. Islam, M. Mannan, Mahadi Hasan Osman, Md. Shaheed Reza, Md. Naim Uddin, M. Rahman
Background and Objective: With changing pattern of culture practices in the coastal region of Bangladesh, the euryhaline giant freshwater prawn Macrobrachium rosenbergii has recently gained popularity among farmers of both semi-intensive and extensive culture systems to improve profitability. Since bacteria are the key player in aquaculture facilities governing health and quality of fish and prawn, comparative bacteriological analyses were undertaken to understand the suitable testing system of bacterial analysis for cultured freshwater prawn.Methodology: Both on-farm and laboratory conditions in low-resource settings were considered to monitor bacterial population in terms of bacterial count, gram staining and presence of enteric bacteria associated with prawn and its surrounding environment.Results: On-farm counting was about one log-unit lower total viable count in water, sediment and prawn samples compared to those of laboratory testing. The differences between on-farm and laboratory analysis probably occurred due to the time lapse during sample transportation. Study also showed that gram negative bacteria were dominant and enteric bacteria were present in both the prawn farms with more or less similar frequencies.Conclusion: It is concluded that the apparent difference in bacteriological condition of the two farms is possibly related to the differences in culture practices, environment and culture conditions and the study has recommended on-farm testing as an ideal bacteriological analysis method.
{"title":"Comparative Bacteriological Analysis of Giant Freshwater Prawn ( Macrobrachium rosenbergii ) Cultured in South-Western Coastal Areas of Bangladesh","authors":"S. Islam, M. A. Islam, M. Mannan, Mahadi Hasan Osman, Md. Shaheed Reza, Md. Naim Uddin, M. Rahman","doi":"10.4172/2155-9546.1000538","DOIUrl":"https://doi.org/10.4172/2155-9546.1000538","url":null,"abstract":"Background and Objective: With changing pattern of culture practices in the coastal region of Bangladesh, the euryhaline giant freshwater prawn Macrobrachium rosenbergii has recently gained popularity among farmers of both semi-intensive and extensive culture systems to improve profitability. Since bacteria are the key player in aquaculture facilities governing health and quality of fish and prawn, comparative bacteriological analyses were undertaken to understand the suitable testing system of bacterial analysis for cultured freshwater prawn.Methodology: Both on-farm and laboratory conditions in low-resource settings were considered to monitor bacterial population in terms of bacterial count, gram staining and presence of enteric bacteria associated with prawn and its surrounding environment.Results: On-farm counting was about one log-unit lower total viable count in water, sediment and prawn samples compared to those of laboratory testing. The differences between on-farm and laboratory analysis probably occurred due to the time lapse during sample transportation. Study also showed that gram negative bacteria were dominant and enteric bacteria were present in both the prawn farms with more or less similar frequencies.Conclusion: It is concluded that the apparent difference in bacteriological condition of the two farms is possibly related to the differences in culture practices, environment and culture conditions and the study has recommended on-farm testing as an ideal bacteriological analysis method.","PeriodicalId":15243,"journal":{"name":"Journal of Aquaculture Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82329740","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 : 2018-01-01DOI: 10.4172/2155-9546.1000553
Gaje Singh, A. Bhatnagar, K. Alok, S. Ajay
This study was aimed at understanding the enzymatic profile of three major Indian carps in managed and unmanaged polyculture systems in the Hisar district, Haryana India. The three species were catla (Catla calta), rohu (Labeo rohita) and mrigala (Cirrhinus mrigala). Analysis of gut contents of C. mrigala from both the ponds was significantly (p<0.05) dominated by phytoplankton. L. rohita gut had similar values of both phytoplankton and zooplankton while C. catla gut was significantly dominated by zooplanktons. The specific cellulase and amylase activities were higher in C. mrigala. It was further observed that these activities are higher in managed ponds as compared to the unmanaged ponds. L. rohita revealed elevated levels of protease and amylase activities which supported the omniplanktivorous nature of the fish. Analysis of digestive enzymes from the gut of C. mrigala revealed more lipase, cellulase and amylase in comparison to other enzymes. It can be concluded that C. mrigala was phytoplanktivorous, L. rohita was omniplanktivorous and C. catla was zooplanktivorous. Fishes reared in managed ponds seemed to have higher enzymatic activities in the gut advocating higher growth. The results of the study enhance our understanding of the feeding patterns at different stratus levels within the available nutrition in polyculture systems.
{"title":"Enzymatic Profiling and Feeding Preferences of Catla: Catla catla, Rohu: Labeo rohita and Mrigala: Cirrhinus mrigala in Rural Polyculture Ponds","authors":"Gaje Singh, A. Bhatnagar, K. Alok, S. Ajay","doi":"10.4172/2155-9546.1000553","DOIUrl":"https://doi.org/10.4172/2155-9546.1000553","url":null,"abstract":"This study was aimed at understanding the enzymatic profile of three major Indian carps in managed and unmanaged polyculture systems in the Hisar district, Haryana India. The three species were catla (Catla calta), rohu (Labeo rohita) and mrigala (Cirrhinus mrigala). Analysis of gut contents of C. mrigala from both the ponds was significantly (p<0.05) dominated by phytoplankton. L. rohita gut had similar values of both phytoplankton and zooplankton while C. catla gut was significantly dominated by zooplanktons. The specific cellulase and amylase activities were higher in C. mrigala. It was further observed that these activities are higher in managed ponds as compared to the unmanaged ponds. L. rohita revealed elevated levels of protease and amylase activities which supported the omniplanktivorous nature of the fish. Analysis of digestive enzymes from the gut of C. mrigala revealed more lipase, cellulase and amylase in comparison to other enzymes. It can be concluded that C. mrigala was phytoplanktivorous, L. rohita was omniplanktivorous and C. catla was zooplanktivorous. Fishes reared in managed ponds seemed to have higher enzymatic activities in the gut advocating higher growth. The results of the study enhance our understanding of the feeding patterns at different stratus levels within the available nutrition in polyculture systems.","PeriodicalId":15243,"journal":{"name":"Journal of Aquaculture Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91038077","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 : 2018-01-01DOI: 10.4172/2155-9546.1000532
F. Phiri, Xinhua Yuan
In the present study, stochastic frontier production function was applied to estimate both the technical efficiency scores and determinants of inefficiency for 20 tilapia farms apiece in Malawi and China. The study used the Cobb- Douglas model in which efficiency estimates showed that tilapia farmers in Malawi were more technically inefficient than farmers in China, with mean efficiency scores of 47% and 91% respectively. With exception of aquaculture experience, all the inefficiency determinants were positive for Malawian farms even though none of the coefficients was significant. For Chinese tilapia farmers, age (significant), household size and education had negative signs except aquaculture experience. The Malawian tilapia industry need technology innovations in order to reduce the existing 53% yield gap, which can ideally be introduction or development of new strains of superior quality, enhanced use of all-male tilapia, improvement in both nursing and grow-out technologies as well as use of quality fish feed.
{"title":"Technical Efficiency of Tilapia Production in Malawi And China: Application of Stochastic Frontier Production Approach","authors":"F. Phiri, Xinhua Yuan","doi":"10.4172/2155-9546.1000532","DOIUrl":"https://doi.org/10.4172/2155-9546.1000532","url":null,"abstract":"In the present study, stochastic frontier production function was applied to estimate both the technical efficiency scores and determinants of inefficiency for 20 tilapia farms apiece in Malawi and China. The study used the Cobb- Douglas model in which efficiency estimates showed that tilapia farmers in Malawi were more technically inefficient than farmers in China, with mean efficiency scores of 47% and 91% respectively. With exception of aquaculture experience, all the inefficiency determinants were positive for Malawian farms even though none of the coefficients was significant. For Chinese tilapia farmers, age (significant), household size and education had negative signs except aquaculture experience. The Malawian tilapia industry need technology innovations in order to reduce the existing 53% yield gap, which can ideally be introduction or development of new strains of superior quality, enhanced use of all-male tilapia, improvement in both nursing and grow-out technologies as well as use of quality fish feed.","PeriodicalId":15243,"journal":{"name":"Journal of Aquaculture Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72778540","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 : 2018-01-01DOI: 10.4172/2155-9546.1000543
Md. Faruque Miah, S. Anwar, Md. Hazrat Ali, M. NiamulNaser, Kawser Ahmed
Background: Monopterus cuchia, an economically important eel of Bangladesh, is confronting the challenge of population reduction and germplasm degeneration since the vast majority of fingerlings are collected from natural habitats and artificial cultivation of the fish is yet to be established. Materials and Methods: 30 individuals of M. cuchia from a natural population of Northern-East part of Bangladesh were analyzed using 8 decamer primers and glutamine synthetase gene was digested with 2 restriction enzymes. Results: A total of 735 bands with 228 polymorphic loci were detected among the selected 30 individuals by using RAPD assay while 100% polymorphism was revealed by all the primers. The genetic distance among the individuals was calculated by using the data from pair-wise similarity index where 36 groups of genetic diversities were measured while the lowest and highest genetic distance were found 0.58 and 0.97 respectively with an average genetic diversity of 0.81. The Nei’s genetic similarity values were found from 0.06 to 0.6 where average value was recorded 0.301746 which was found significant regarding genetic distance. Phylogenetic relationships using UPGMA clustering revealed linkage distance ranged from 3.6 to 6.24 and generated 6 clusters by 11 clades with the involvement of 22 individuals while the rest of the samples were connected to those clades with specific linkage distances. Genetic diversity of glutamine synthetase gene was analyzed with two restriction enzymes, e.g. +CfrI and +Hpy178III while both the enzymes digested the gene fragment at a length of 541 bp and polymorphism was detected in terms of wild type homogygotes, polymorphic homozygote and heterozygosity. The genetic diversity was observed by using the RFLP band analysis and four different groups of individuals were identified with the p-values of 0, 0.033, 0.05 and 1 respectively whereas different distances were found among the groups indicating the polymorphism among experimental individuals of glutamine synthetase gene. Conclusion: Herein, RAPD and RFLP analysis indicating the rich genetic diversity of this fish in the experimental ecological habitat and this would come helpful for the conservation of germplasm diversity and to support the sustainable breeding program of M. cuchia.
{"title":"Assessment of Genetic Diversity of Freshwater Mud Eel (Monopterus cuchia) Using RAPD and RFLP Markers","authors":"Md. Faruque Miah, S. Anwar, Md. Hazrat Ali, M. NiamulNaser, Kawser Ahmed","doi":"10.4172/2155-9546.1000543","DOIUrl":"https://doi.org/10.4172/2155-9546.1000543","url":null,"abstract":"Background: Monopterus cuchia, an economically important eel of Bangladesh, is confronting the challenge of population reduction and germplasm degeneration since the vast majority of fingerlings are collected from natural habitats and artificial cultivation of the fish is yet to be established. Materials and Methods: 30 individuals of M. cuchia from a natural population of Northern-East part of Bangladesh were analyzed using 8 decamer primers and glutamine synthetase gene was digested with 2 restriction enzymes. Results: A total of 735 bands with 228 polymorphic loci were detected among the selected 30 individuals by using RAPD assay while 100% polymorphism was revealed by all the primers. The genetic distance among the individuals was calculated by using the data from pair-wise similarity index where 36 groups of genetic diversities were measured while the lowest and highest genetic distance were found 0.58 and 0.97 respectively with an average genetic diversity of 0.81. The Nei’s genetic similarity values were found from 0.06 to 0.6 where average value was recorded 0.301746 which was found significant regarding genetic distance. Phylogenetic relationships using UPGMA clustering revealed linkage distance ranged from 3.6 to 6.24 and generated 6 clusters by 11 clades with the involvement of 22 individuals while the rest of the samples were connected to those clades with specific linkage distances. Genetic diversity of glutamine synthetase gene was analyzed with two restriction enzymes, e.g. +CfrI and +Hpy178III while both the enzymes digested the gene fragment at a length of 541 bp and polymorphism was detected in terms of wild type homogygotes, polymorphic homozygote and heterozygosity. The genetic diversity was observed by using the RFLP band analysis and four different groups of individuals were identified with the p-values of 0, 0.033, 0.05 and 1 respectively whereas different distances were found among the groups indicating the polymorphism among experimental individuals of glutamine synthetase gene. Conclusion: Herein, RAPD and RFLP analysis indicating the rich genetic diversity of this fish in the experimental ecological habitat and this would come helpful for the conservation of germplasm diversity and to support the sustainable breeding program of M. cuchia.","PeriodicalId":15243,"journal":{"name":"Journal of Aquaculture Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83395586","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 : 2018-01-01DOI: 10.4172/2155-9546.1000541
Muhammad Enayet Ullah Rana, A. Salam, Shahriar Nazrul Km, M. Hasan
The present investigation was carried out to assess the socio-economic and livelihood status of the hilsa (Tenualosa ilisha) fishermen of the river Meghna in Ramgati upazila (sub-district) under Lakshmipur district from December 2015 to May 2016. Pertinent data were collected from randomly selected 150 hilsa fishermen by personal interview with a structured questionnaire, focus group discussion and, data were crosschecked with the key informants. Data interpretation showed that the maximum number of fishers (33%) belonged to the age group of 31 to 40 years. Most of the fishers belonged to the joint family with average family members (7) higher than the national average. In addition, most of the participants (49%) can only sign followed by illiterate (24%) and only few fishers passed primary (20%) and secondary (7%) level of education. Although they are fishing round the year, vegetables were the most common food item consumed by the fishers’ family. Majority of the fishers (67%) worked on another fishermen’s boat as labour. The highest number (44%) of the fishers’ annual income ranged between 21,000 and 40,000 BDT where highest income was more than 100,000 BDT. About 93% of the fishermen depended on loan to run the fishing and among them 33% depended on Mahajon and 24% on Aratdar. Almost all the fishers (91%) mentioned that piracy was the major problem and, 53% and 89% reported both dadon and market controlled by Aratder/bapari respectively as the main constraints in their business. To safeguard the livelihood of the fishermen, the government, donor agencies and NGOs should come forward to provide adult education, loan without or minimum interest and set criteria for the Aratder/bapari so that they can’t harass the fishers during fish selling.
{"title":"Hilsa Fishers of Ramgati, Lakshmipur, Bangladesh: An Overview of Socio- Economic and Livelihood Context","authors":"Muhammad Enayet Ullah Rana, A. Salam, Shahriar Nazrul Km, M. Hasan","doi":"10.4172/2155-9546.1000541","DOIUrl":"https://doi.org/10.4172/2155-9546.1000541","url":null,"abstract":"The present investigation was carried out to assess the socio-economic and livelihood status of the hilsa (Tenualosa ilisha) fishermen of the river Meghna in Ramgati upazila (sub-district) under Lakshmipur district from December 2015 to May 2016. Pertinent data were collected from randomly selected 150 hilsa fishermen by personal interview with a structured questionnaire, focus group discussion and, data were crosschecked with the key informants. Data interpretation showed that the maximum number of fishers (33%) belonged to the age group of 31 to 40 years. Most of the fishers belonged to the joint family with average family members (7) higher than the national average. In addition, most of the participants (49%) can only sign followed by illiterate (24%) and only few fishers passed primary (20%) and secondary (7%) level of education. Although they are fishing round the year, vegetables were the most common food item consumed by the fishers’ family. Majority of the fishers (67%) worked on another fishermen’s boat as labour. The highest number (44%) of the fishers’ annual income ranged between 21,000 and 40,000 BDT where highest income was more than 100,000 BDT. About 93% of the fishermen depended on loan to run the fishing and among them 33% depended on Mahajon and 24% on Aratdar. Almost all the fishers (91%) mentioned that piracy was the major problem and, 53% and 89% reported both dadon and market controlled by Aratder/bapari respectively as the main constraints in their business. To safeguard the livelihood of the fishermen, the government, donor agencies and NGOs should come forward to provide adult education, loan without or minimum interest and set criteria for the Aratder/bapari so that they can’t harass the fishers during fish selling.","PeriodicalId":15243,"journal":{"name":"Journal of Aquaculture Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77534074","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 : 2018-01-01DOI: 10.4172/2155-9546.1000529
H. S. Khalil, A. Mansour, Ashraf Goda, A. El-Hammady, E. Omar
A total of 120 meagre, Argyrosomus regius, larvae (0.37 ± 0.02 g) were assigned to four treatments (three replicates each) to determine the optimum dietary level of PUFAs, at which there will be the best growth performance, feed utilization, fatty acids composition and antioxidant status. The treatments were a control group (fed a basal diet 3% PUFAs of total fatty acids) and another three groups fed PUFAs supplemented diets at levels 4.55, 6% and 7% for 21 days. The results indicated that increasing dietary PUFAs levels up to 4.5% significantly improved growth and survival compared to the control group. Feed intake, feed conversion ratio and protein utilization were significantly increased with 4.5% PUFAs followed by the control group. The results revealed significant differences in PUFAs among treatments and the best value was reported for the 4.5% PUFAs supplemented diet followed by the control. There is a significant increase in TBARs levels with increasing dietary PUFAs concentration. Meanwhile, the SOD and CAT activities decreased significantly with increasing PUFAs levels. However, TAS decreased significantly with higher PUFAS level (6%) only compared to other treatments. Therefore, the dietary requirements of A. regius larvae is 4.5% PUFAs of total fatty acids.
{"title":"Effect of Poly-Unsaturated Fatty Acids Fortification on Growth Performance, Survival, Fatty Acid Composition and Antioxidant Balance of Meagre, Argyrosomus regius Larvae","authors":"H. S. Khalil, A. Mansour, Ashraf Goda, A. El-Hammady, E. Omar","doi":"10.4172/2155-9546.1000529","DOIUrl":"https://doi.org/10.4172/2155-9546.1000529","url":null,"abstract":"A total of 120 meagre, Argyrosomus regius, larvae (0.37 ± 0.02 g) were assigned to four treatments (three replicates each) to determine the optimum dietary level of PUFAs, at which there will be the best growth performance, feed utilization, fatty acids composition and antioxidant status. The treatments were a control group (fed a basal diet 3% PUFAs of total fatty acids) and another three groups fed PUFAs supplemented diets at levels 4.55, 6% and 7% for 21 days. The results indicated that increasing dietary PUFAs levels up to 4.5% significantly improved growth and survival compared to the control group. Feed intake, feed conversion ratio and protein utilization were significantly increased with 4.5% PUFAs followed by the control group. The results revealed significant differences in PUFAs among treatments and the best value was reported for the 4.5% PUFAs supplemented diet followed by the control. There is a significant increase in TBARs levels with increasing dietary PUFAs concentration. Meanwhile, the SOD and CAT activities decreased significantly with increasing PUFAs levels. However, TAS decreased significantly with higher PUFAS level (6%) only compared to other treatments. Therefore, the dietary requirements of A. regius larvae is 4.5% PUFAs of total fatty acids.","PeriodicalId":15243,"journal":{"name":"Journal of Aquaculture Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79569676","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 : 2018-01-01DOI: 10.4172/2155-9546.1000558
Hossein Par, avar, Mizanur Rahman, Phoo War War, Chang-hoon Kim
Three experiments were designed to determine the appropriate size and density for optimum growth and survival of rockworm polychaete Marphysa sanguinea integrated culture with olive flounder Paralichythys olivaceus in the flowthrough system under controlled laboratory condition over a 13-week period. The experimental design in T1, T2, T3, T4 and T5 for Experiment-1(<0.5 g) was 200, 400, 800, 400 and 400 worms for Experiment-2 (<0.5-1.5 g) was 100, 200, 400, 200 and 200 worms and for Experiment-3 (1.5-2.5 g) was 50, 100, 200, 100 and 100 worms respectively. The worm feed of T1, T2 and T3 was feces of fish and uneaten feed; that of T4 was controlled-no feed and that of T5 was commercial feed. The polychaete worms were kept in 15 boxes (L50 × W40 × H30 cm), and bottoms of the boxes were filled with a 15~20 cm layer of substrate sediment with 50% gravel and 50% oyster shell. Thirty fishes were placed in each cubic tank (L70 × W40 × H20 cm) with 55 L water. The weight gain of rockworms (<0.5 g) in T1, T2 and T3 for Experiment-1 (<0.5 g) has shown 152.7%, 153.8%, and 140.3%, respectively. The weight gain was higher than in the other two groups, as the weight gain of rockworms in T1, T2 and T3 for Experiment-2 (0.5-1.5 g) was 51%, 30%, and 46%, respectively, and that of rockworms for Experiment-3 (<1.5-2.5 g), that is, 75%, 73% and 62%, respectively. From this result, it can be concluded that in the flow through system a small size (< 0.5 g) group of rockworms can be one of the most suitable species at the density of 2000-4000 inds.m on fish feces and uneaten feed, as they can grow better than 0.5-1.5 g and 1.5-2.5 g rockworms. On the other hand, integrated results have indicated that in the flow through system around 8 g olive flounder fish was an excellent candidate to be associated with 0.5-1.5 g worms, which can grow better than a small size (< 0.5 g) group of rockworms and then 1.5-2.5 g worms at the optimum density 1000-2000 indv.m-2 polychaetes
{"title":"Effects of Growth on Polychaete Rockworm, Marphysa sanguinea Integrated Culture with Olive Flounder, Paralichythys olivaceus in Flow Through System","authors":"Hossein Par, avar, Mizanur Rahman, Phoo War War, Chang-hoon Kim","doi":"10.4172/2155-9546.1000558","DOIUrl":"https://doi.org/10.4172/2155-9546.1000558","url":null,"abstract":"Three experiments were designed to determine the appropriate size and density for optimum growth and survival of rockworm polychaete Marphysa sanguinea integrated culture with olive flounder Paralichythys olivaceus in the flowthrough system under controlled laboratory condition over a 13-week period. The experimental design in T1, T2, T3, T4 and T5 for Experiment-1(<0.5 g) was 200, 400, 800, 400 and 400 worms for Experiment-2 (<0.5-1.5 g) was 100, 200, 400, 200 and 200 worms and for Experiment-3 (1.5-2.5 g) was 50, 100, 200, 100 and 100 worms respectively. The worm feed of T1, T2 and T3 was feces of fish and uneaten feed; that of T4 was controlled-no feed and that of T5 was commercial feed. The polychaete worms were kept in 15 boxes (L50 × W40 × H30 cm), and bottoms of the boxes were filled with a 15~20 cm layer of substrate sediment with 50% gravel and 50% oyster shell. Thirty fishes were placed in each cubic tank (L70 × W40 × H20 cm) with 55 L water. The weight gain of rockworms (<0.5 g) in T1, T2 and T3 for Experiment-1 (<0.5 g) has shown 152.7%, 153.8%, and 140.3%, respectively. The weight gain was higher than in the other two groups, as the weight gain of rockworms in T1, T2 and T3 for Experiment-2 (0.5-1.5 g) was 51%, 30%, and 46%, respectively, and that of rockworms for Experiment-3 (<1.5-2.5 g), that is, 75%, 73% and 62%, respectively. From this result, it can be concluded that in the flow through system a small size (< 0.5 g) group of rockworms can be one of the most suitable species at the density of 2000-4000 inds.m on fish feces and uneaten feed, as they can grow better than 0.5-1.5 g and 1.5-2.5 g rockworms. On the other hand, integrated results have indicated that in the flow through system around 8 g olive flounder fish was an excellent candidate to be associated with 0.5-1.5 g worms, which can grow better than a small size (< 0.5 g) group of rockworms and then 1.5-2.5 g worms at the optimum density 1000-2000 indv.m-2 polychaetes","PeriodicalId":15243,"journal":{"name":"Journal of Aquaculture Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78354379","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 : 2018-01-01DOI: 10.4172/2155-9546.1000542
R. Ej
One of the main challenges of pearl industry in Fiji and the South Pacific is trying to control the harmful effects of excessive biofouling on Mother of Pearl Oysters until they are ready implanting and grafting process. Controlling and cleaning biofouling is a major expense of any pearl farm operation. Biofouling also has a significant effect on the growth rate and survival of pearl oysters. An experiment was setup in Valili pearl farm to find out the best cleaning regime for highest growth rate of Mother of Pearl oysters from January 2012 through to June 2012. The experimental setup had 4 treatments; 2 week, 4 week, 6 week and 20 week cleaning regime. Each treatment had 5 panel nets with 21 oysters. The results showed that the oysters treated with 4 and 6 week cleaning regime had significantly higher growth rates than 2 and 20 week cleaning regime.
{"title":"Cleaning Regime for Pinctada margaritifera (Linneaus, 1758) in Savusavu Bay, Fiji","authors":"R. Ej","doi":"10.4172/2155-9546.1000542","DOIUrl":"https://doi.org/10.4172/2155-9546.1000542","url":null,"abstract":"One of the main challenges of pearl industry in Fiji and the South Pacific is trying to control the harmful effects of excessive biofouling on Mother of Pearl Oysters until they are ready implanting and grafting process. Controlling and cleaning biofouling is a major expense of any pearl farm operation. Biofouling also has a significant effect on the growth rate and survival of pearl oysters. An experiment was setup in Valili pearl farm to find out the best cleaning regime for highest growth rate of Mother of Pearl oysters from January 2012 through to June 2012. The experimental setup had 4 treatments; 2 week, 4 week, 6 week and 20 week cleaning regime. Each treatment had 5 panel nets with 21 oysters. The results showed that the oysters treated with 4 and 6 week cleaning regime had significantly higher growth rates than 2 and 20 week cleaning regime.","PeriodicalId":15243,"journal":{"name":"Journal of Aquaculture Research and Development","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85928973","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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