Pub Date : 2021-09-30DOI: 10.21077/ijf.2021.68.3.114729-04
Zi-song Yang, Wang Xuefeng, Jiawei Zeng, Kun Lin, Lyu Shaoliang, Guobao Chen
Bigeyes (Priacanthus spp.; Family: Priacanthidae) are among the most significant demersal fishes in northern South China Sea (nSCS). Based on the bottom trawl data of nSCS from 2009 to 2014, this study applied the SARIMA (Seasonal Autoregressive Integrated Moving Average) model and the centre of gravity movement to analyse the spatio-temporal patterns of catch per unit effort (CPUE). Combining with the corresponding environmental factors of each trawling cruise, including bottom water temperature (BWT), bottom water salinity (BWS) and sea surface height (SSH) and their relationships with the CPUE were analysed by generalised linear model (GLM). The results indicated that, the monthly CPUE varied in half a year as a period and the peak in the first half year was obviously lower than the one in the second half year. The annual temporal trend of the centre of gravity movement was similar, which was related to the monthly variation of CPUE. Among the environmental factors, SSH had the greatest impact on CPUE, especially in October, November and December, 2009 and 2012; BWS had a significant impact on CPUE in July, August and September, 2009 and October, November and December, 2012. The spatio-temporal scale of the CPUE was mainly influenced by SSH and BWS under the effect of nSCS currents. This study presents a method for spatio-temporal variation of economic fish CPUE, integrating the centre of gravity movement and the temporal variation of the CPUE with the environmental factors, which is helpful for determining the fishery management unit and closed fishing season in the nSCS. Keywords: Bigeye fish (Priacanthus spp.), Environmental factors, Generalised linear model (GLM), Northern South China Sea (nSCS), Spatio-temporal patterns
{"title":"Effects of environmental factors on the spatio-temporal patterns of bigeyes (Priacanthus spp.) in the northern South China Sea","authors":"Zi-song Yang, Wang Xuefeng, Jiawei Zeng, Kun Lin, Lyu Shaoliang, Guobao Chen","doi":"10.21077/ijf.2021.68.3.114729-04","DOIUrl":"https://doi.org/10.21077/ijf.2021.68.3.114729-04","url":null,"abstract":"Bigeyes (Priacanthus spp.; Family: Priacanthidae) are among the most significant demersal fishes in northern South China Sea (nSCS). Based on the bottom trawl data of nSCS from 2009 to 2014, this study applied the SARIMA (Seasonal Autoregressive Integrated Moving Average) model and the centre of gravity movement to analyse the spatio-temporal patterns of catch per unit effort (CPUE). Combining with the corresponding environmental factors of each trawling cruise, including bottom water temperature (BWT), bottom water salinity (BWS) and sea surface height (SSH) and their relationships with the CPUE were analysed by generalised linear model (GLM). The results indicated that, the monthly CPUE varied in half a year as a period and the peak in the first half year was obviously lower than the one in the second half year. The annual temporal trend of the centre of gravity movement was similar, which was related to the monthly variation of CPUE. Among the environmental factors, SSH had the greatest impact on CPUE, especially in October, November and December, 2009 and 2012; BWS had a significant impact on CPUE in July, August and September, 2009 and October, November and December, 2012. The spatio-temporal scale of the CPUE was mainly influenced by SSH and BWS under the effect of nSCS currents. This study presents a method for spatio-temporal variation of economic fish CPUE, integrating the centre of gravity movement and the temporal variation of the CPUE with the environmental factors, which is helpful for determining the fishery management unit and closed fishing season in the nSCS. Keywords: Bigeye fish (Priacanthus spp.), Environmental factors, Generalised linear model (GLM), Northern South China Sea (nSCS), Spatio-temporal patterns","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47024980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-30DOI: 10.21077/ijf.2021.68.3.110058-01
Shubhadeep Ghosh, M. Satishkumar, H. M. Manas, P. Rohit, E. M. Abdussamad, A. Gopalakrishnan
Population parameters have been studied in nine of the 21 species of barracudas reported globally. Along the Bay of Bengal, Sphyraena putnamae (Jordan and Seale, 1905) forms a significant fishery; however, no information exists globally with respect to its growth, mortality and exploitation. This maiden study details the population dynamics analysed from samples collected from trawlnetters, gillnetters and hooks and lines along the western Bay of Bengal during January 2017 to December 2019. The mean fork length in the catch was 50.8 cm with the largest individual measuring 108.0 cm, the highest ever length recorded for the species. von Bertalanffy growth equation derived is Lt = 113.87 [1 - e -0.23 (t + 0.0636)]. The fishery was dominated by 1-4 year old age classes and lifespan estimated was 12.98 years. Year-round recruitment with the major peak producing 60.87% of the annual recruits was observed from February to June. Natural, fishing and total mortalities were 0.46, 0.25 and 0.71 per year, respectively. Exploitation rate (E) estimated was 0.35 with the exploitation ratio (U) being 0.18. Though the current status indicates that the stock is underexploited, it is however prudent to adopt a precautionary approach, considering the small size as well as age of exploitation, through adoption of measures such as increase in mesh size of trawlnetters and spatio-temporal fishing restrictions in nearshore nursery waters.
{"title":"Population parameters of sawtooth barracuda Sphyraena putnamae (Jordan and Seale, 1905) exploited along western Bay of Bengal","authors":"Shubhadeep Ghosh, M. Satishkumar, H. M. Manas, P. Rohit, E. M. Abdussamad, A. Gopalakrishnan","doi":"10.21077/ijf.2021.68.3.110058-01","DOIUrl":"https://doi.org/10.21077/ijf.2021.68.3.110058-01","url":null,"abstract":"Population parameters have been studied in nine of the 21 species of barracudas reported globally. Along the Bay of \u0000Bengal, Sphyraena putnamae (Jordan and Seale, 1905) forms a significant fishery; however, no information exists globally \u0000with respect to its growth, mortality and exploitation. This maiden study details the population dynamics analysed from \u0000samples collected from trawlnetters, gillnetters and hooks and lines along the western Bay of Bengal during January 2017 to \u0000December 2019. The mean fork length in the catch was 50.8 cm with the largest individual measuring 108.0 cm, the highest \u0000ever length recorded for the species. von Bertalanffy growth equation derived is Lt \u0000 \u0000= 113.87 [1 - e -0.23 (t + 0.0636)]. The fishery \u0000was dominated by 1-4 year old age classes and lifespan estimated was 12.98 years. Year-round recruitment with the major \u0000peak producing 60.87% of the annual recruits was observed from February to June. Natural, fishing and total mortalities \u0000were 0.46, 0.25 and 0.71 per year, respectively. Exploitation rate (E) estimated was 0.35 with the exploitation ratio (U) being \u00000.18. Though the current status indicates that the stock is underexploited, it is however prudent to adopt a precautionary \u0000approach, considering the small size as well as age of exploitation, through adoption of measures such as increase in mesh \u0000size of trawlnetters and spatio-temporal fishing restrictions in nearshore nursery waters.","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43848898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-30DOI: 10.21077/ijf.2021.68.3.98464-11
Xiuying Yan, Ling-Fan Xiong, Jie Li, Ya Wang, S. Cai, J. Jian
Grass carp reovirus (GCRV) seriously affects the grass carp farming, as the causative agent of grass carp hemorrhagic disease. In this study, we found the GCRV 096 NS38 protein contained one conservative PXXP motif similar to σNS of avian reovirus, with very low similarity rates with its homologous GCRV proteins of different genotypes. Furthermore, the soluble GCRV 096 NS38 protein was expressed in Escherichia coli, antiserum was raised and characterised. Addition of purified NS38 protein to culture media of Ctenopharyngodon idella kidney (CIK) cells clearly inhibited replication of GCRV 096 (genotype I); however, replication of GCRV GD108 (genotype Ш) was not significantly affected in CIK cells under the same conditions. It was not possible to induce cross-protection among GCRVs of different genotypes. GCRV multi-genotype should be considered and the NS38 protein was a promising candidate for developing therapies against grass carp hemorrhagic disease. Additionally, bioinformatics analysis suggested that the NS38 protein may be involved in viral genome replication. Keywords: Expression, Functional analysis, Grass carp reovirus 096, NS38 protein, Replication
{"title":"NS38 protein of GCRV 096: Functional analysis and effect on grass carp reovirus replication","authors":"Xiuying Yan, Ling-Fan Xiong, Jie Li, Ya Wang, S. Cai, J. Jian","doi":"10.21077/ijf.2021.68.3.98464-11","DOIUrl":"https://doi.org/10.21077/ijf.2021.68.3.98464-11","url":null,"abstract":"Grass carp reovirus (GCRV) seriously affects the grass carp farming, as the causative agent of grass carp hemorrhagic disease. In this study, we found the GCRV 096 NS38 protein contained one conservative PXXP motif similar to σNS of avian reovirus, with very low similarity rates with its homologous GCRV proteins of different genotypes. Furthermore, the soluble GCRV 096 NS38 protein was expressed in Escherichia coli, antiserum was raised and characterised. Addition of purified NS38 protein to culture media of Ctenopharyngodon idella kidney (CIK) cells clearly inhibited replication of GCRV 096 (genotype I); however, replication of GCRV GD108 (genotype Ш) was not significantly affected in CIK cells under the same conditions. It was not possible to induce cross-protection among GCRVs of different genotypes. GCRV multi-genotype should be considered and the NS38 protein was a promising candidate for developing therapies against grass carp hemorrhagic disease. Additionally, bioinformatics analysis suggested that the NS38 protein may be involved in viral genome replication. Keywords: Expression, Functional analysis, Grass carp reovirus 096, NS38 protein, Replication","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47940556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-30DOI: 10.21077/ijf.2021.68.3.116333-12
S. Panda, D. Soren, K. K. Nayak, Progyan Roy, B. Das
In the current investigation, the kinetics of Mx transcripts expression in the blood of Labeo catla (Hamilton 1822) inoculated with poly I: C, was studied for 14 days. The level of Mx transcript in the blood cells increased as compared to control fish inoculated with phosphate buffered saline. The level of Mx transcript was quantified along with semi-quantitative expression for β-actin. The level of Mx transcript was maximum on day 2 and 3 (β-actin: Mx ratio of about 0.8) which reduced after day 4 and the response disappeared on day 7. Western blots of the blood showed an immune-reactive band of 72 kDa, which is typical for L. catla Mx protein. Results suggest an increase in levels of Mx transcript after poly I: C injection which can stimulate an antiviral phase and the appropriateness of Mx expression investigation as an indicator to assess protective action. Keywords: Immuno-histochemistry, Myxovirus resistance, Poly I: C, Reverse transcriptase, Western blotting
{"title":"Poly I: C stimulates, Mx transcript and promotes an antiviral state in blood of Labeo catla (Hamilton 1822)","authors":"S. Panda, D. Soren, K. K. Nayak, Progyan Roy, B. Das","doi":"10.21077/ijf.2021.68.3.116333-12","DOIUrl":"https://doi.org/10.21077/ijf.2021.68.3.116333-12","url":null,"abstract":"In the current investigation, the kinetics of Mx transcripts expression in the blood of Labeo catla (Hamilton 1822) inoculated with poly I: C, was studied for 14 days. The level of Mx transcript in the blood cells increased as compared to control fish inoculated with phosphate buffered saline. The level of Mx transcript was quantified along with semi-quantitative expression for β-actin. The level of Mx transcript was maximum on day 2 and 3 (β-actin: Mx ratio of about 0.8) which reduced after day 4 and the response disappeared on day 7. Western blots of the blood showed an immune-reactive band of 72 kDa, which is typical for L. catla Mx protein. Results suggest an increase in levels of Mx transcript after poly I: C injection which can stimulate an antiviral phase and the appropriateness of Mx expression investigation as an indicator to assess protective action. Keywords: Immuno-histochemistry, Myxovirus resistance, Poly I: C, Reverse transcriptase, Western blotting","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45637739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-30DOI: 10.21077/ijf.2021.68.3.114730-05
Wu Zhi, Zhu Shuli, Li Jie, Li Yuefei, Xia Yuguo, Liu Xinhui
The Xijiang River, China, is a hotspot for fish biodiversity. Using hydroacoustic data collected from March to June 2016, the spatial autocorrelation and heterogeneity of fish resources were determined using geostatistical methods. We analysed the skewness, kurtosis and coefficient of variation for fish density along the river and also examined the spatial autocorrelation of these data using Moran’s I statistic. Fish density was low in most of the survey areas. Moran’s I values were all positive (z>1.96, p≤0.01), which indicates significant spatial autocorrelation; however, the degree of spatial aggregation varied among months. Hotspot analysis revealed strong local spatial autocorrelation and varying “hot” and “cold spots” in different months. The spatial heterogeneity and directional variation of fish densities were assessed using geostatistical methods and the best-fitting semivariogram was an exponential model. Spatial autocorrelation accounted for 56-75% of the variation in the model, which indicates that fish distribution in the Xijiang River has a clear spatial structure. The results show the applicability of acoustic methods to study the spatial autocorrelation and heterogeneity of fish resources in rivers and provide a reference for the management of fish stocks. Keywords: Fish resources; Hydroacoustic technology; Spatial autocorrelation; Variation characteristics; Xijiang River
{"title":"Spatial autocorrelation and heterogeneity of fish resources in the Xijiang River, Pearl River Basin, China","authors":"Wu Zhi, Zhu Shuli, Li Jie, Li Yuefei, Xia Yuguo, Liu Xinhui","doi":"10.21077/ijf.2021.68.3.114730-05","DOIUrl":"https://doi.org/10.21077/ijf.2021.68.3.114730-05","url":null,"abstract":"The Xijiang River, China, is a hotspot for fish biodiversity. Using hydroacoustic data collected from March to June 2016, the spatial autocorrelation and heterogeneity of fish resources were determined using geostatistical methods. We analysed the skewness, kurtosis and coefficient of variation for fish density along the river and also examined the spatial autocorrelation of these data using Moran’s I statistic. Fish density was low in most of the survey areas. Moran’s I values were all positive (z>1.96, p≤0.01), which indicates significant spatial autocorrelation; however, the degree of spatial aggregation varied among months. Hotspot analysis revealed strong local spatial autocorrelation and varying “hot” and “cold spots” in different months. The spatial heterogeneity and directional variation of fish densities were assessed using geostatistical methods and the best-fitting semivariogram was an exponential model. Spatial autocorrelation accounted for 56-75% of the variation in the model, which indicates that fish distribution in the Xijiang River has a clear spatial structure. The results show the applicability of acoustic methods to study the spatial autocorrelation and heterogeneity of fish resources in rivers and provide a reference for the management of fish stocks. Keywords: Fish resources; Hydroacoustic technology; Spatial autocorrelation; Variation characteristics; Xijiang River","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41527566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-30DOI: 10.21077/ijf.2021.68.3.111408-17
K. Chakraborty, Soumya Krishnan, R. Chakraborty, P. Vijayagopal
Fatty acid profile of deep-sea mud shrimp (Solenocera hextii) and shovel-nosed lobster (Thenus unimaculatus) harvested from south-west coast (Arabian Sea) of India were evaluated and compared. Palmitic and oleic acids were the principle saturated fatty acids and monounsaturated fatty acids, respectively in lobster and shrimp species. T. unimaculatus contained greater concentrations of C20-22 n-3 polyunsaturated fatty acids, such as docosahexaenoic acid and eicosapentaenoic acid. Higher n-3/n-6 polyunsaturated fatty acid ratio (greater than 4) in addition to considerably greater polyunsaturated/saturated fatty acid (>1.2) and hypocholesterolaemic/hypercholesterolaemic ratio (>2) were recorded in shovel-nosed lobster compared to the mud shrimp. Lesser thrombogenicity (≤0.5) and atherogenicity (<1.0) indices recognised T. unimaculatus as a desirable marine species for human nutrition.
{"title":"Deep-sea mud shrimp and shovel-nosed lobster from the Arabian Sea as prospective sources of long-chain polyunsaturated fatty acids","authors":"K. Chakraborty, Soumya Krishnan, R. Chakraborty, P. Vijayagopal","doi":"10.21077/ijf.2021.68.3.111408-17","DOIUrl":"https://doi.org/10.21077/ijf.2021.68.3.111408-17","url":null,"abstract":"Fatty acid profile of deep-sea mud shrimp (Solenocera hextii) and shovel-nosed lobster (Thenus unimaculatus) harvested \u0000from south-west coast (Arabian Sea) of India were evaluated and compared. Palmitic and oleic acids were the principle \u0000saturated fatty acids and monounsaturated fatty acids, respectively in lobster and shrimp species. T. unimaculatus contained \u0000greater concentrations of C20-22 n-3 polyunsaturated fatty acids, such as docosahexaenoic acid and eicosapentaenoic acid. \u0000Higher n-3/n-6 polyunsaturated fatty acid ratio (greater than 4) in addition to considerably greater polyunsaturated/saturated \u0000fatty acid (>1.2) and hypocholesterolaemic/hypercholesterolaemic ratio (>2) were recorded in shovel-nosed lobster \u0000compared to the mud shrimp. Lesser thrombogenicity (≤0.5) and atherogenicity (<1.0) indices recognised T. unimaculatus \u0000as a desirable marine species for human nutrition.","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47200942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-30DOI: 10.21077/ijf.2021.68.3.89358-18
K. Blossom, Ancy Thomas, M. P. Safeena
Fish viscera rich in protein components can be utilised for the preparation of sausage casing which will serve as a means of fish processing waste management. A study was conducted on preliminary screening and selection of fish viscera for sausage casing, comparison of the selected casing with goat casing and quality analysis of the sausage during storage at -21°C for 60 days. Viscera from Saurida tumbil, Katsuwonus pelamis, Labeo rohita, Pangasius hypophthalmus and Scomberomorus guttatus were collected and salt treated to improve quality. A standard recipe was followed for the preparation of sausage using meat of S. tumbil. Fish sausages were processed at 70°C for 15 min. Lizard fish gut was selected as best for sausage casing via sensory analysis and was compared with goat casing by texture profile analyser. There was significant difference in textural qualities except springiness and cohesiveness (p<0.5%). The quality parameters like pH, peroxide value, free fatty acid, total volatile base nitrogen, trimethyl amine and total plate count were analysed. A gradual increase in all parameters was observed as storage proceeded but was within the acceptable limit except pH. Keywords: Alternative casing, Fish processing, Fish sausage, Fish waste management
{"title":"Preliminary screening and process standardisation of edible sausage casing from fish viscera","authors":"K. Blossom, Ancy Thomas, M. P. Safeena","doi":"10.21077/ijf.2021.68.3.89358-18","DOIUrl":"https://doi.org/10.21077/ijf.2021.68.3.89358-18","url":null,"abstract":"Fish viscera rich in protein components can be utilised for the preparation of sausage casing which will serve as a means of fish processing waste management. A study was conducted on preliminary screening and selection of fish viscera for sausage casing, comparison of the selected casing with goat casing and quality analysis of the sausage during storage at -21°C for 60 days. Viscera from Saurida tumbil, Katsuwonus pelamis, Labeo rohita, Pangasius hypophthalmus and Scomberomorus guttatus were collected and salt treated to improve quality. A standard recipe was followed for the preparation of sausage using meat of S. tumbil. Fish sausages were processed at 70°C for 15 min. Lizard fish gut was selected as best for sausage casing via sensory analysis and was compared with goat casing by texture profile analyser. There was significant difference in textural qualities except springiness and cohesiveness (p<0.5%). The quality parameters like pH, peroxide value, free fatty acid, total volatile base nitrogen, trimethyl amine and total plate count were analysed. A gradual increase in all parameters was observed as storage proceeded but was within the acceptable limit except pH. Keywords: Alternative casing, Fish processing, Fish sausage, Fish waste management","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47162473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-30DOI: 10.21077/ijf.2021.68.3.114197-07
Jian Liang, X. Bi, W. Dai, Y. Deng, undefined undefined
To evaluate the feasibility of particulated microalgae composite (PMC) as live microalgae substitute in artificial breeding of Manila clam Ruditapes philippinarum, effects of replacing Dicrateria inornata with partial or total PMC on the growth, digestive enzyme activities, nutritional ingredient composition and microbial composition in faeces of juvenile clams were investigated. The results showed that 50 and 100% PMC replacement did not affect the mean shell length, mean body weight and survival rate of juvenile clams (p>0.05). Juvenile clams fed with 100% PMC replacement had higher lipase and pepsin activities than those fed with 100% D. inornata (p 0.05). Significant increase in delicious amino acid contents (p<0.05) was observed with 100% PMC replacement. PMC replacement did not affect the diversity of dominant phyla in faeces, but the abundance of each dominant phylum. Similar relative abundance of faecal bacteria was observed when D. inornata was replaced with 50 and 100% PMC. PMC appeared to be a potential substitute for microalgae in artificial Manila clam breeding. Keywords: Dicrateria inornata, Microalgae substitute, Particulated microalgae composite, Ruditapes philippinarum
{"title":"Particulated Microalgae Composite (PMC) As Substitute For Live Microalgae In Culture Of Juvenile Manila Clam Ruditapes Philippinarum (A. Adams And Reeve, 1850): A Feasibility Analysis","authors":"Jian Liang, X. Bi, W. Dai, Y. Deng, undefined undefined","doi":"10.21077/ijf.2021.68.3.114197-07","DOIUrl":"https://doi.org/10.21077/ijf.2021.68.3.114197-07","url":null,"abstract":"To evaluate the feasibility of particulated microalgae composite (PMC) as live microalgae substitute in artificial breeding of Manila clam Ruditapes philippinarum, effects of replacing Dicrateria inornata with partial or total PMC on the growth, digestive enzyme activities, nutritional ingredient composition and microbial composition in faeces of juvenile clams were investigated. The results showed that 50 and 100% PMC replacement did not affect the mean shell length, mean body weight and survival rate of juvenile clams (p>0.05). Juvenile clams fed with 100% PMC replacement had higher lipase and pepsin activities than those fed with 100% D. inornata (p 0.05). Significant increase in delicious amino acid contents (p<0.05) was observed with 100% PMC replacement. PMC replacement did not affect the diversity of dominant phyla in faeces, but the abundance of each dominant phylum. Similar relative abundance of faecal bacteria was observed when D. inornata was replaced with 50 and 100% PMC. PMC appeared to be a potential substitute for microalgae in artificial Manila clam breeding. Keywords: Dicrateria inornata, Microalgae substitute, Particulated microalgae composite, Ruditapes philippinarum","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45050895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-09-30DOI: 10.21077/ijf.2021.68.3.107196-06
P. Asha, K. Diwakar, A. Usharani, D. Prema
A study was conducted for a period of two years from 2017 to 2018 to assess the health of Tuticorin Bay, south-east coast of India. Water and sediment quality parameters, total clam density, heavy metal content in the sediment and clam tissue samples from four sites were used as the criteria for health assessment. High values of parameters like salinity (38.3±5.04 ppt) and ammonia (0.09±0.04 mg l-1) were observed at the station close to the thermal power station and high nitrite (0.688±0.13 µg l-1) and total suspended solids (380.3±0.04 mgl-1) were observed at the station close to Koramballam freshwater creek. Most of the water quality variables were within the standard limit prescribed for aquaculture activities. The organic matter content in the sediment of the bay ranged from 0.26 to 5.17%. Comparatively low heavy metal concentration was observed both in the sediment and clam tissue samples. The metals were found accumulated in the order of Fe>Mn> Pb>Cu>Ni>Cd in the sediment samples and in the order Fe>Pb>Mn>Cu>Cd>Ni in clam tissue samples. The estimated levels were also within the permissible limits for most of the metals. The study indicated that Tuticorin Bay is suitable for mariculture activities. Keywords: Clam density, Heavy metal concentration, Tuticorin Bay, Water and sediment quality parameters
{"title":"Investigations on selected ecological parameters of Tuticorin Bay, Gulf of Mannar, south-east coast of India with emphasis on suitability for mariculture","authors":"P. Asha, K. Diwakar, A. Usharani, D. Prema","doi":"10.21077/ijf.2021.68.3.107196-06","DOIUrl":"https://doi.org/10.21077/ijf.2021.68.3.107196-06","url":null,"abstract":"A study was conducted for a period of two years from 2017 to 2018 to assess the health of Tuticorin Bay, south-east coast of India. Water and sediment quality parameters, total clam density, heavy metal content in the sediment and clam tissue samples from four sites were used as the criteria for health assessment. High values of parameters like salinity (38.3±5.04 ppt) and ammonia (0.09±0.04 mg l-1) were observed at the station close to the thermal power station and high nitrite (0.688±0.13 µg l-1) and total suspended solids (380.3±0.04 mgl-1) were observed at the station close to Koramballam freshwater creek. Most of the water quality variables were within the standard limit prescribed for aquaculture activities. The organic matter content in the sediment of the bay ranged from 0.26 to 5.17%. Comparatively low heavy metal concentration was observed both in the sediment and clam tissue samples. The metals were found accumulated in the order of Fe>Mn> Pb>Cu>Ni>Cd in the sediment samples and in the order Fe>Pb>Mn>Cu>Cd>Ni in clam tissue samples. The estimated levels were also within the permissible limits for most of the metals. The study indicated that Tuticorin Bay is suitable for mariculture activities. Keywords: Clam density, Heavy metal concentration, Tuticorin Bay, Water and sediment quality parameters","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41431878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Based on the samples from bottom trawls collected during March to October 2020 in the East China Sea, growth parameters, mortality rate and recruitment pattern of the swimming crab, Portunus trituberculatus (Miers, 1876), were estimated using FiSAT II software. Parameters of the von Bertalanffy equation obtained by ELEFAN I for males and males respectively were: growth coefficient (k) -0.99 and 1.01, theoretical maximum carapace width (L∞) - 22.58 and 21.53 cm and theoretical age at length 0 (t 0 ) -0.1738 and -0.15785. Mortality parameters estimated by the length onverted catch curve analysis for males and females were: total mortality (Z) -4.26 and 4.65, natural mortality (M) -1.643 and 1.784 and fishing mortality (F) -2.617 and 2.866, for females and males, respectively. The stock recruitment showed a bimodal pattern, in which the main peak was from July to October and the second peak in February and March. The exploitation rates arrived at were 0.61 and 0.62 for females and males respectively, while the exploitation maximum (Emax) obtained were 0.63 and 0.61 in females and males respectively. The results showed that, female swimming crabs in the East China Sea grow faster and reach larger carapace width than males and the current exploitation rate is very high and close to the value for maximum yield, indicating overfishing. Keywords: Biological parameters, East China Sea, Growth, Mortality, Portunus trituberculatus
{"title":"Growth, mortality parameters and exploitation of the swimming crab Portunus trituberculatus (Miers, 1876) in the East China Sea","authors":"Zhu Kai, Liang Zhenhua, Zhou Yongdong, Xu Kaida, Zhu Wenbin, Wang Zhongming","doi":"10.21077/ijf.2021.68.3.114209-02","DOIUrl":"https://doi.org/10.21077/ijf.2021.68.3.114209-02","url":null,"abstract":"Based on the samples from bottom trawls collected during March to October 2020 in the East China Sea, growth parameters, mortality rate and recruitment pattern of the swimming crab, Portunus trituberculatus (Miers, 1876), were estimated using FiSAT II software. Parameters of the von Bertalanffy equation obtained by ELEFAN I for males and males respectively were: growth coefficient (k) -0.99 and 1.01, theoretical maximum carapace width (L∞) - 22.58 and 21.53 cm and theoretical age at length 0 (t 0 ) -0.1738 and -0.15785. Mortality parameters estimated by the length onverted catch curve analysis for males and females were: total mortality (Z) -4.26 and 4.65, natural mortality (M) -1.643 and 1.784 and fishing mortality (F) -2.617 and 2.866, for females and males, respectively. The stock recruitment showed a bimodal pattern, in which the main peak was from July to October and the second peak in February and March. The exploitation rates arrived at were 0.61 and 0.62 for females and males respectively, while the exploitation maximum (Emax) obtained were 0.63 and 0.61 in females and males respectively. The results showed that, female swimming crabs in the East China Sea grow faster and reach larger carapace width than males and the current exploitation rate is very high and close to the value for maximum yield, indicating overfishing. Keywords: Biological parameters, East China Sea, Growth, Mortality, Portunus trituberculatus","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41866524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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