Pub Date : 2023-09-30DOI: 10.21077/ijf.2023.70.3.133916-11
G. Sathishkumar, N. Felix, Amit Ranjan, Mir Ishfaq Nazir, E. Prabu, Kalidoss Manikandan
The present study evaluated the dietary substitution effect of silkworm pupae meal (SWP) forfish meal (FM) on growth performance, feed utilisation, whole-body proximate composition,amino acid profile and digestive enzyme activities of Pacific white shrimp (Penaeusvannamei). The shrimp were fed with six isonitrogenous (36% crude protein), isolipidic (8%crude lipid) and isocaloric (16 MJ kg-1) experimental diets, containing 0, 20, 40, 60, 80 and100% SWP, respectively, to replace dietary FM. A total of 360 shrimps (average initial weightof 3.86±0.20 g) were distributed into 18 tanks (20 shrimp per tank). The experimental dietswere fed to triplicate groups of P. vannamei three times a day until satiation for 45 days.Significantly (p<0.05) higher growth performance and feed utilisation were found in shrimpfed diet with 60% incorporation level of SWP meal. No significant differences (p>0.05) wereobserved in the survival rate, whole-body proximate composition and amino acid profile ofshrimp fed SWP meal-incorporated diets. Additionally, higher specific activities of digestiveenzymes such as amylase, trypsin and lipase were observed in shrimps fed diet with 60%incorporation level of SWP meal. The present study revealed that dietary fish meal proteinup to 60% can be substituted with SWP without compromising growth performance, feedutilisation, whole-body proximate composition, amino acid profile and digestive enzymeactivities of Pacific white shrimp fed on SWP meal based diets. Keywords:Amylase, Feed ingredient, Waste utilisation,Weight gain
{"title":"Substituting dietary fishmeal with silkworm pupae meal in diets of Pacific white shrimp (Penaeus vannamei): Effects on growth performance, nutrient utilisation, whole-body composition and digestive enzyme activities","authors":"G. Sathishkumar, N. Felix, Amit Ranjan, Mir Ishfaq Nazir, E. Prabu, Kalidoss Manikandan","doi":"10.21077/ijf.2023.70.3.133916-11","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.3.133916-11","url":null,"abstract":"The present study evaluated the dietary substitution effect of silkworm pupae meal (SWP) forfish meal (FM) on growth performance, feed utilisation, whole-body proximate composition,amino acid profile and digestive enzyme activities of Pacific white shrimp (Penaeusvannamei). The shrimp were fed with six isonitrogenous (36% crude protein), isolipidic (8%crude lipid) and isocaloric (16 MJ kg-1) experimental diets, containing 0, 20, 40, 60, 80 and100% SWP, respectively, to replace dietary FM. A total of 360 shrimps (average initial weightof 3.86±0.20 g) were distributed into 18 tanks (20 shrimp per tank). The experimental dietswere fed to triplicate groups of P. vannamei three times a day until satiation for 45 days.Significantly (p<0.05) higher growth performance and feed utilisation were found in shrimpfed diet with 60% incorporation level of SWP meal. No significant differences (p>0.05) wereobserved in the survival rate, whole-body proximate composition and amino acid profile ofshrimp fed SWP meal-incorporated diets. Additionally, higher specific activities of digestiveenzymes such as amylase, trypsin and lipase were observed in shrimps fed diet with 60%incorporation level of SWP meal. The present study revealed that dietary fish meal proteinup to 60% can be substituted with SWP without compromising growth performance, feedutilisation, whole-body proximate composition, amino acid profile and digestive enzymeactivities of Pacific white shrimp fed on SWP meal based diets. Keywords:Amylase, Feed ingredient, Waste utilisation,Weight gain","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139333662","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 : 2023-09-30DOI: 10.21077/ijf.2023.70.3.110920-17
Shiba Prasad Debbarma, Amitava Ghosh, Raja Debnath, Biswajit Lahiri, Yumlembam Jackie Singh, Prasenjit Pal, A. D. Upadhyay
Shortage in different cadres of Fisheries extension professionals in Tripura led the presentstudy to identify their perceived level of job satisfaction and also to probe into the constraintsfaced by such professionals and put forth probable suggestions. The research methodologypremised on structured interview schedule, with factors of job satisfaction as well as a scalewith 20 statements, filled by respondents and those were rated in a five-point continuum.Results revealed that 71.46% fisheries extension professionals confessed to “medium” levelof job satisfaction. Multiple stepwise logistic forward regressions made it clear that proximityto job location, health status, service duration and caste were possible factors, which appearto have significant influence over perceived job satisfaction. Weighted average scores ofdifferent ‘organisational’ and ‘work environmental’ factors of job satisfaction were 2.61and 2.89 respectively, indicating ‘medium’ level of satisfaction whereas, ‘job content’, ‘jobroles and responsibility’ and ‘personal factors’ of job satisfaction scored 3.32, 3.39 and 3.74respectively, suggesting ‘high’ level of satisfaction. Values of Rank Based Quotient revealedthat financial crunch in the Fisheries Department (98.72), delayed sanction in procuringessential official items (97.58), insufficient quality inputs and untimely supply to the fishfarmers (87.89) were the three major constraints associated with their job. Study suggeststhat adequate budget allocation, timely recruitment of staff with proper job specificationand capacity building may significantly improve the level of job satisfaction for sustainablegrowth of fisheries sector in the state. Keywords:Extension professionals, Fisheries, Jobsatisfaction, Tripura
{"title":"Job satisfaction of fisheries extension professionals: An exploratory study in Tripura, North-east India","authors":"Shiba Prasad Debbarma, Amitava Ghosh, Raja Debnath, Biswajit Lahiri, Yumlembam Jackie Singh, Prasenjit Pal, A. D. Upadhyay","doi":"10.21077/ijf.2023.70.3.110920-17","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.3.110920-17","url":null,"abstract":"Shortage in different cadres of Fisheries extension professionals in Tripura led the presentstudy to identify their perceived level of job satisfaction and also to probe into the constraintsfaced by such professionals and put forth probable suggestions. The research methodologypremised on structured interview schedule, with factors of job satisfaction as well as a scalewith 20 statements, filled by respondents and those were rated in a five-point continuum.Results revealed that 71.46% fisheries extension professionals confessed to “medium” levelof job satisfaction. Multiple stepwise logistic forward regressions made it clear that proximityto job location, health status, service duration and caste were possible factors, which appearto have significant influence over perceived job satisfaction. Weighted average scores ofdifferent ‘organisational’ and ‘work environmental’ factors of job satisfaction were 2.61and 2.89 respectively, indicating ‘medium’ level of satisfaction whereas, ‘job content’, ‘jobroles and responsibility’ and ‘personal factors’ of job satisfaction scored 3.32, 3.39 and 3.74respectively, suggesting ‘high’ level of satisfaction. Values of Rank Based Quotient revealedthat financial crunch in the Fisheries Department (98.72), delayed sanction in procuringessential official items (97.58), insufficient quality inputs and untimely supply to the fishfarmers (87.89) were the three major constraints associated with their job. Study suggeststhat adequate budget allocation, timely recruitment of staff with proper job specificationand capacity building may significantly improve the level of job satisfaction for sustainablegrowth of fisheries sector in the state. Keywords:Extension professionals, Fisheries, Jobsatisfaction, Tripura","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139333735","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 : 2023-09-30DOI: 10.21077/ijf.2023.70.3.111390-20
D. Bhakta, Sudhir Kumar Das, B. K. Das
An attempt was made in the present article to review the food and feeding habits of thefishes of the family Sciaenidae from Indian waters. Members of the Sciaenidae family arecommonly referred to as croakers or drums because of the sound produced by their swimbladders. Sciaenids are distributed in tropical and sub-tropical oceans. They are carnivorous,feeding mainly on crustaceans, small fish, molluscs, annelids and polychaetes and exhibitcannibalism. Sciaenids display differences in food preferences between early stages andadults; the former prefers zooplankton and crustaceans, and the latter mainly smallerteleosts. The feeding intensity was found to be higher in smaller groups compared to maturefish. Considerable temporal variations were recorded in food item occurrence, indicatingan empty stomach during peak breeding and a wide spectrum of food items during otherseasons. Keywords:Croakers, Feeding intensity, Food and feedinghabits, Sciaenids
{"title":"Food and feeding habits of Indian sciaenids - A review","authors":"D. Bhakta, Sudhir Kumar Das, B. K. Das","doi":"10.21077/ijf.2023.70.3.111390-20","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.3.111390-20","url":null,"abstract":"An attempt was made in the present article to review the food and feeding habits of thefishes of the family Sciaenidae from Indian waters. Members of the Sciaenidae family arecommonly referred to as croakers or drums because of the sound produced by their swimbladders. Sciaenids are distributed in tropical and sub-tropical oceans. They are carnivorous,feeding mainly on crustaceans, small fish, molluscs, annelids and polychaetes and exhibitcannibalism. Sciaenids display differences in food preferences between early stages andadults; the former prefers zooplankton and crustaceans, and the latter mainly smallerteleosts. The feeding intensity was found to be higher in smaller groups compared to maturefish. Considerable temporal variations were recorded in food item occurrence, indicatingan empty stomach during peak breeding and a wide spectrum of food items during otherseasons. Keywords:Croakers, Feeding intensity, Food and feedinghabits, Sciaenids","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139331669","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 : 2023-09-30DOI: 10.21077/ijf.2023.70.3.126239-07
J. Felix, M. Menon, Shubhadeep Ghosh, Latha Shenoy
Sepia aculeata Van Hasselt, 1835 is a commercially important cuttlefish in Indian seaswith limited studies on its biology from the Indo-Pacific region. This study, observed thereproductive biology of S. aculeata from samples landed by the trawl fishery operating offthe coast of north Andhra Pradesh, off the western Bay of Bengal. A total of 3511 sampleswere studied, of which 2241 were females having dorsal mantle length (DML) ranging from8.7 to 21.4 cm and weight from 78 to 901 g and 1260 were male specimens of DML rangingfrom 7.9 to 21.9 cm and weight from 54 to 738 g. Females dominated the landings with a sexratio of 1.78. The length at first maturity was estimated at 14.3 and 12.6 cm DML for femalesand males, respectively. Both sexes spawned throughout the year with two significant peaksfrom July to October and from December to February with minor intermittent peaks. Theabsolute fecundity ranged from 330±1.44 x 102 eggs, with a relative fecundity of 75±8.94 x102 eggs 100 g-1 body weight. The results of this study may be used as inputs in assessingthe stock of S. aculeata in the study region. Keywords:Cephalopods, Needle cuttlefish, Size at firstmaturity, Spawning season, Trawl fisheries
{"title":"Reproduction in Sepia aculeata Van Hasselt, 1835 along the Andhra Pradesh coast, off the western Bay of Bengal","authors":"J. Felix, M. Menon, Shubhadeep Ghosh, Latha Shenoy","doi":"10.21077/ijf.2023.70.3.126239-07","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.3.126239-07","url":null,"abstract":"Sepia aculeata Van Hasselt, 1835 is a commercially important cuttlefish in Indian seaswith limited studies on its biology from the Indo-Pacific region. This study, observed thereproductive biology of S. aculeata from samples landed by the trawl fishery operating offthe coast of north Andhra Pradesh, off the western Bay of Bengal. A total of 3511 sampleswere studied, of which 2241 were females having dorsal mantle length (DML) ranging from8.7 to 21.4 cm and weight from 78 to 901 g and 1260 were male specimens of DML rangingfrom 7.9 to 21.9 cm and weight from 54 to 738 g. Females dominated the landings with a sexratio of 1.78. The length at first maturity was estimated at 14.3 and 12.6 cm DML for femalesand males, respectively. Both sexes spawned throughout the year with two significant peaksfrom July to October and from December to February with minor intermittent peaks. Theabsolute fecundity ranged from 330±1.44 x 102 eggs, with a relative fecundity of 75±8.94 x102 eggs 100 g-1 body weight. The results of this study may be used as inputs in assessingthe stock of S. aculeata in the study region. Keywords:Cephalopods, Needle cuttlefish, Size at firstmaturity, Spawning season, Trawl fisheries","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139331720","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 : 2023-09-30DOI: 10.21077/ijf.2023.70.3.131669-04
Shraddha D. Ranaware, V. H. Nirmale, B. P. Bhosale, S. Metar, Prakash E. Shingare
The obtuse barracuda Sphyraena obtusata (Cuvier, 1829) is a commercially important foodfish belonging to the family Sphyraenidae and landed mostly as trawl bycatch along Ratnagiri.Investigations were carried out on the species with respect to the length-weight relationship,condition factor, morphometrics, feeding and reproductive biology. The length-weightrelationship showed positive allometric growth in males, females and pooled individuals. Allmorphometric measurements showed a high degree of correlation with total length. The gutcontent analysis revealed S. obtusata to be a carnivore fish feeding mainly on fish juveniles,fish scales, crustaceans and cephalopod appendages. The male:female sex ratio was foundto be 1:0.90. Gonado-somatic index (GSI), maturity and ova diameter studies indicated thatS. obtusata has a prolonged spawning season with individuals spawning twice in a season.Absolute fecundity ranged from 68355 to 310615 eggs with an average of 137783 eggs. Themean length at sexual maturity for females was found to be 22.92 cm. Keywords:Carnivorous fish, Fish biology, Life history,Trophodynamics, Tropical fisheries
{"title":"Feeding dynamics and reproductive biology of the obtuse barracuda Sphyraena obtusata (Cuvier, 1829) from Ratnagiri, central west coast of India","authors":"Shraddha D. Ranaware, V. H. Nirmale, B. P. Bhosale, S. Metar, Prakash E. Shingare","doi":"10.21077/ijf.2023.70.3.131669-04","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.3.131669-04","url":null,"abstract":"The obtuse barracuda Sphyraena obtusata (Cuvier, 1829) is a commercially important foodfish belonging to the family Sphyraenidae and landed mostly as trawl bycatch along Ratnagiri.Investigations were carried out on the species with respect to the length-weight relationship,condition factor, morphometrics, feeding and reproductive biology. The length-weightrelationship showed positive allometric growth in males, females and pooled individuals. Allmorphometric measurements showed a high degree of correlation with total length. The gutcontent analysis revealed S. obtusata to be a carnivore fish feeding mainly on fish juveniles,fish scales, crustaceans and cephalopod appendages. The male:female sex ratio was foundto be 1:0.90. Gonado-somatic index (GSI), maturity and ova diameter studies indicated thatS. obtusata has a prolonged spawning season with individuals spawning twice in a season.Absolute fecundity ranged from 68355 to 310615 eggs with an average of 137783 eggs. Themean length at sexual maturity for females was found to be 22.92 cm. Keywords:Carnivorous fish, Fish biology, Life history,Trophodynamics, Tropical fisheries","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139332619","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 : 2023-09-30DOI: 10.21077/ijf.2023.70.3.101296-10
Ravi Kumar, M. Monobrullah, B. P. Bhatt, A. Raizada, A. R. Sen, S. K. Samal, Manoj Kumar
The study aims to assess productivity, economics, energy use efficiency and CO2e emissionfrom integrated fish-duck farming system (IFDF system) in floodplains of the eastern India.A total of six fish ponds were constructed and developed as IFDF system under floodplainsin which fingerlings were stocked @4000 acre-1 and integrated with 150 numbers of KhakiCampbell ducks. Average growth rate of fishes ranged from 27 g month-1 of mrigal to 31.7 gmonth-1 of grass carp and average body weight ranged from 465.2 g of mrigal to 823.2 gof grass carp. The fish equivalent yield was obtained as 3.06 t acre-1 year-1. The total energyinput, output and energy use efficiency ratio estimated were 111.8 GJ and 21.2 GJ and 0.19,respectively. Net income earned was ₹234393 acre-1 year-1 and BC ratio estimated was 1.91.Further, 0.56 kg CO2e was emitted to produce 1.0 kg of fish equivalent, which was muchlower than that of the production of rice, mutton and milk. Keywords:CO2e emission, Economics, Energy, Fish-duckfarming, Floodplain, Productivity
{"title":"Productivity, energy use efficiency, economics and CO2 emission from integrated fish-duck farming in floodplain wetland ecosystems of eastern India","authors":"Ravi Kumar, M. Monobrullah, B. P. Bhatt, A. Raizada, A. R. Sen, S. K. Samal, Manoj Kumar","doi":"10.21077/ijf.2023.70.3.101296-10","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.3.101296-10","url":null,"abstract":"The study aims to assess productivity, economics, energy use efficiency and CO2e emissionfrom integrated fish-duck farming system (IFDF system) in floodplains of the eastern India.A total of six fish ponds were constructed and developed as IFDF system under floodplainsin which fingerlings were stocked @4000 acre-1 and integrated with 150 numbers of KhakiCampbell ducks. Average growth rate of fishes ranged from 27 g month-1 of mrigal to 31.7 gmonth-1 of grass carp and average body weight ranged from 465.2 g of mrigal to 823.2 gof grass carp. The fish equivalent yield was obtained as 3.06 t acre-1 year-1. The total energyinput, output and energy use efficiency ratio estimated were 111.8 GJ and 21.2 GJ and 0.19,respectively. Net income earned was ₹234393 acre-1 year-1 and BC ratio estimated was 1.91.Further, 0.56 kg CO2e was emitted to produce 1.0 kg of fish equivalent, which was muchlower than that of the production of rice, mutton and milk. Keywords:CO2e emission, Economics, Energy, Fish-duckfarming, Floodplain, Productivity","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139332673","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 : 2023-09-30DOI: 10.21077/ijf.2023.70.3.128992-15
C. G. Joshy, K. Elavarasan, V. Renuka, B. Madhusudana Rao, K. V. Premdev, A. A. Zynudheen, G. Ninan
This study was conducted to estimate the magnitude of processing waste produced in theorganised shrimp processing sector of India in order to assess the opportunities availablefor its utilisation. The estimation of magnitude of shrimp processing waste was based onsecondary data and its management was based on primary data collected through surveysat processing plants. The organised shrimp processing sector in India generated a largevolume of shrimp processing waste at a growth rate of 12% during 2000-2018. The quantityof shrimp processing waste generated ranged from 1.2 to 4.6 lakh t, which can be utilisedto produce 6712 to 27453 t of chitin alone. However, our study indicated that 75% of thetotal waste generated remained either unused or managed unscientifically, even when thereis huge demand for chitin and its derivatives in the domestic as well as in the internationalmarket. The case studies from chitin producing plants revealed that some costs wereincurred in the procurement of shrimp processing waste as a secondary raw material for theproduction of chitin. Thus forming a link between shrimp processing plants and chitin and itsderivatives producing plants would improve the supply of quality raw material and improveutilisation of processing wastes. The number of chitin and its derivatives producing plantsare too few in India to fully accommodate the large volume of shrimp processing wastegenerated every year. Therefore, infrastructure development in the chitin and associatedindustry with active support from government organisations to overcome the burden of initialinvestment is needed urgently, which can in turn encourage entrepreneurship developmentin the sector for diversified applications. Keywords:Chitin, Chitosan, Glucosamine hydrochloride,Growth rate, Waste utilisation
{"title":"Estimation and management of shrimp processing waste in organised shrimp processing sector in India: Opportunities and challenges","authors":"C. G. Joshy, K. Elavarasan, V. Renuka, B. Madhusudana Rao, K. V. Premdev, A. A. Zynudheen, G. Ninan","doi":"10.21077/ijf.2023.70.3.128992-15","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.3.128992-15","url":null,"abstract":"This study was conducted to estimate the magnitude of processing waste produced in theorganised shrimp processing sector of India in order to assess the opportunities availablefor its utilisation. The estimation of magnitude of shrimp processing waste was based onsecondary data and its management was based on primary data collected through surveysat processing plants. The organised shrimp processing sector in India generated a largevolume of shrimp processing waste at a growth rate of 12% during 2000-2018. The quantityof shrimp processing waste generated ranged from 1.2 to 4.6 lakh t, which can be utilisedto produce 6712 to 27453 t of chitin alone. However, our study indicated that 75% of thetotal waste generated remained either unused or managed unscientifically, even when thereis huge demand for chitin and its derivatives in the domestic as well as in the internationalmarket. The case studies from chitin producing plants revealed that some costs wereincurred in the procurement of shrimp processing waste as a secondary raw material for theproduction of chitin. Thus forming a link between shrimp processing plants and chitin and itsderivatives producing plants would improve the supply of quality raw material and improveutilisation of processing wastes. The number of chitin and its derivatives producing plantsare too few in India to fully accommodate the large volume of shrimp processing wastegenerated every year. Therefore, infrastructure development in the chitin and associatedindustry with active support from government organisations to overcome the burden of initialinvestment is needed urgently, which can in turn encourage entrepreneurship developmentin the sector for diversified applications. Keywords:Chitin, Chitosan, Glucosamine hydrochloride,Growth rate, Waste utilisation","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139332960","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 : 2023-09-30DOI: 10.21077/ijf.2023.70.3.131965-05
T. T. Paul, C. Albin Albert, S. Manoharan, Asha Langde, D. Sudheesan, U.K Sarkar, B. K. Das
Feeding and breeding biology of a prominent indigenous fishery of Peechi Reservoir(protected reservoir) was assessed using 300 specimens in this study. Catch compositionstudies identified Salmostoma sp. as the major species contributing to the reservoir fishery.With the help of mitochondrial CO1 gene, the species was identified as Salmostomanovacula. The feeding biology of the fishes was studied using index of preponderance(IOP), gastro-somatic index (GaSI) and relative gut length (RGL). IOP of S. novacula revealedthat zooplankton dominated the gut of the species to the tune of nearly 70.82%. The meanRGL and GaSI of S. novacula was estimated at 1.42 (1.42±0.25) and 4.22 respectively. Theindices used for reproductive study were size at first maturity, sex ratio, gonado-somaticindices and fecundity. The size at first maturity for S. novacula was found to be 13.0 cm. Thesex ratio and relative fecundity were estimated at 1.2:1.0 and 8500-8833 nos. per gram bodyweight of fish. The study indicated that the fishes mature during March to August and exhibitspawning activity in September. The paper emphasises a need for enforcing minimum legalsize and restricted monsoon fishing for sustained fisheries in this reservoir. Keywords:CO1 gene, Feeding biology, Fisheries management,Reproductive biology, Salmostoma novacula
{"title":"Biological observations of Salmostoma novacula fishery of a protected reservoir in India","authors":"T. T. Paul, C. Albin Albert, S. Manoharan, Asha Langde, D. Sudheesan, U.K Sarkar, B. K. Das","doi":"10.21077/ijf.2023.70.3.131965-05","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.3.131965-05","url":null,"abstract":"Feeding and breeding biology of a prominent indigenous fishery of Peechi Reservoir(protected reservoir) was assessed using 300 specimens in this study. Catch compositionstudies identified Salmostoma sp. as the major species contributing to the reservoir fishery.With the help of mitochondrial CO1 gene, the species was identified as Salmostomanovacula. The feeding biology of the fishes was studied using index of preponderance(IOP), gastro-somatic index (GaSI) and relative gut length (RGL). IOP of S. novacula revealedthat zooplankton dominated the gut of the species to the tune of nearly 70.82%. The meanRGL and GaSI of S. novacula was estimated at 1.42 (1.42±0.25) and 4.22 respectively. Theindices used for reproductive study were size at first maturity, sex ratio, gonado-somaticindices and fecundity. The size at first maturity for S. novacula was found to be 13.0 cm. Thesex ratio and relative fecundity were estimated at 1.2:1.0 and 8500-8833 nos. per gram bodyweight of fish. The study indicated that the fishes mature during March to August and exhibitspawning activity in September. The paper emphasises a need for enforcing minimum legalsize and restricted monsoon fishing for sustained fisheries in this reservoir. Keywords:CO1 gene, Feeding biology, Fisheries management,Reproductive biology, Salmostoma novacula","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139332980","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 : 2023-09-30DOI: 10.21077/ijf.2023.70.3.131136-03
S. Surya, E. M. Abdussamad, R. Pratibha, J. M. Ponni, J.H. Kingsly, S. Jasmine, K. G. Mini, K. M. Rajesh, P. Abdul Azeez, C. Anulekshmi, H. M. Manas, J. K. Dona, D. Y. Dispin, M. K. Anil
Auxis rochei is one of the coastal tunnies contributing substantially to the tuna landings inIndia, with an average (2014-2019) annual catch of 7210 t. Kerala stood first, with an annualaverage landing of 3176 t. The fishery comprised 14.5 - 39.6 cm fork length (FL) size groupswith a mean length of 27.64 cm and a major mode of 26 cm FL. The Length-weight (L-W)relationship of pooled fishes was expressed as W= 0.000003 L3.22 (r2= 0.91). The size at firstmaturity was estimated at 25.8 cm FL when the fish was 1.5 years old. The number of eggsper spawning ranged from 84,562 to 1,33,698 and the ova diameter ranged between 0.1and 0.6 mm, indicating asynchronous oocyte development with multiple spawning. Highergonadosomatic index (GSI) was recorded during April, May and June and coincided withthe minimum gastrosomatic index (GaSI). The recruitment pattern was bimodal, with variedintensity ranging from 0.79-17.89%. Growth was allometric and the von Bertalanffy growthequation derived was Lt=43.5(1-e-0.8(t+0.0212)). The growth performance index (ɸ) was 3.18 andthe longevity of the fish was estimated at 3.7 years. One-year-old plus fishes sustained thefishery (22 - 32 cm FL). Total mortality (Z), natural mortality (M) and fishing mortality (F)were estimated at 3.70, 1.40 and 2.30, respectively, with an exploitation rate (E) of 0.62and the exploitation ratio (U) of 0.60. Beverton and Holt yield per recruit (Y/R) and Biomassper recruit analysis indicated that the Emax was at 0.87, much higher than the present levelof exploitation, reflecting the sustainable fishery along the coast. Standing stock biomass(SSB) was estimated at 7215.7 t, and the spawning stock biomass formed 55.5% of the SSB.Thompson and Bell analysis indicated the MSY as 8125 t, at F-factor, 2.6. The biologicalreference points FCURR/FMSY (0.4) and BCURR/BMSY (1.5) were at safe levels, signifying the scopefor fishery enhancement. Keywords:Biological reference point, Fecundity, Growth, GSI,L-W relationship, Mean length, Mortality, SSB
{"title":"An insight into the fishery, biology and population dynamics of Auxis rochei (Risso, 1810) along the south-west coast of India","authors":"S. Surya, E. M. Abdussamad, R. Pratibha, J. M. Ponni, J.H. Kingsly, S. Jasmine, K. G. Mini, K. M. Rajesh, P. Abdul Azeez, C. Anulekshmi, H. M. Manas, J. K. Dona, D. Y. Dispin, M. K. Anil","doi":"10.21077/ijf.2023.70.3.131136-03","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.3.131136-03","url":null,"abstract":"Auxis rochei is one of the coastal tunnies contributing substantially to the tuna landings inIndia, with an average (2014-2019) annual catch of 7210 t. Kerala stood first, with an annualaverage landing of 3176 t. The fishery comprised 14.5 - 39.6 cm fork length (FL) size groupswith a mean length of 27.64 cm and a major mode of 26 cm FL. The Length-weight (L-W)relationship of pooled fishes was expressed as W= 0.000003 L3.22 (r2= 0.91). The size at firstmaturity was estimated at 25.8 cm FL when the fish was 1.5 years old. The number of eggsper spawning ranged from 84,562 to 1,33,698 and the ova diameter ranged between 0.1and 0.6 mm, indicating asynchronous oocyte development with multiple spawning. Highergonadosomatic index (GSI) was recorded during April, May and June and coincided withthe minimum gastrosomatic index (GaSI). The recruitment pattern was bimodal, with variedintensity ranging from 0.79-17.89%. Growth was allometric and the von Bertalanffy growthequation derived was Lt=43.5(1-e-0.8(t+0.0212)). The growth performance index (ɸ) was 3.18 andthe longevity of the fish was estimated at 3.7 years. One-year-old plus fishes sustained thefishery (22 - 32 cm FL). Total mortality (Z), natural mortality (M) and fishing mortality (F)were estimated at 3.70, 1.40 and 2.30, respectively, with an exploitation rate (E) of 0.62and the exploitation ratio (U) of 0.60. Beverton and Holt yield per recruit (Y/R) and Biomassper recruit analysis indicated that the Emax was at 0.87, much higher than the present levelof exploitation, reflecting the sustainable fishery along the coast. Standing stock biomass(SSB) was estimated at 7215.7 t, and the spawning stock biomass formed 55.5% of the SSB.Thompson and Bell analysis indicated the MSY as 8125 t, at F-factor, 2.6. The biologicalreference points FCURR/FMSY (0.4) and BCURR/BMSY (1.5) were at safe levels, signifying the scopefor fishery enhancement. Keywords:Biological reference point, Fecundity, Growth, GSI,L-W relationship, Mean length, Mortality, SSB","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139333366","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 : 2023-09-30DOI: 10.21077/ijf.2023.70.3.123684-08
G. Barlaya, K. Anantharaja, C. H. Raghavendra, B. S. Anand Kumar, K. Hemaprasanth
A 90-day trial was conducted to determine the optimal stocking density for raising fingerlingsof Barbodes carnaticus (Jerdon, 1849). The fish were reared in cement tanks of 24 m2 atstocking densities of 15, 30, 45, 60, 75, 90, 105 and 120 m-2. Initially, cow dung was appliedat a basal rate of 3 t ha-1 in the experimental rearing tanks. After a week of manuring, thetanks were stocked with fry of B. carnaticus (mean length 0.98±0.04 cm; weight 4.55±0.04mg). During the first month, the fish were fed a mixture of groundnut oil cake and rice bran(1:1) at 10% of body weight. A sinking pellet feed (3 mm, 35% crude protein) based on fishmealwas fed to satiation in the second and third months. The harvested fish weight ranged from0.50 g in 120 m-2 to 3.53 g in 15 m-2 densities, whereas fish length varied from 3.55 cm in 120m-2 to 6.66 cm in 15 m-2 densities. The results showed that the stocking density inverselycorrelated with final length and weight. The condition factor ranged between 1.01 and1.20, while survival rate varied from 85.66 to 91.47%, with no differences (p>0.05) betweentreatments. The highest fish biomass per tank was recorded under stocking densities of 30and 45 m-2, which indicates that 45 m-2 is the optimal stocking density for fry to fingerlingrearing of B. carnaticus. Keywords:Carnatic carp, Puntius carnaticus, Seed rearing,Species diversification
{"title":"Standardisation of stocking density for raising fingerlings of farm-bred peninsular carp Barbodes carnaticus (Jerdon, 1849)","authors":"G. Barlaya, K. Anantharaja, C. H. Raghavendra, B. S. Anand Kumar, K. Hemaprasanth","doi":"10.21077/ijf.2023.70.3.123684-08","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.3.123684-08","url":null,"abstract":"A 90-day trial was conducted to determine the optimal stocking density for raising fingerlingsof Barbodes carnaticus (Jerdon, 1849). The fish were reared in cement tanks of 24 m2 atstocking densities of 15, 30, 45, 60, 75, 90, 105 and 120 m-2. Initially, cow dung was appliedat a basal rate of 3 t ha-1 in the experimental rearing tanks. After a week of manuring, thetanks were stocked with fry of B. carnaticus (mean length 0.98±0.04 cm; weight 4.55±0.04mg). During the first month, the fish were fed a mixture of groundnut oil cake and rice bran(1:1) at 10% of body weight. A sinking pellet feed (3 mm, 35% crude protein) based on fishmealwas fed to satiation in the second and third months. The harvested fish weight ranged from0.50 g in 120 m-2 to 3.53 g in 15 m-2 densities, whereas fish length varied from 3.55 cm in 120m-2 to 6.66 cm in 15 m-2 densities. The results showed that the stocking density inverselycorrelated with final length and weight. The condition factor ranged between 1.01 and1.20, while survival rate varied from 85.66 to 91.47%, with no differences (p>0.05) betweentreatments. The highest fish biomass per tank was recorded under stocking densities of 30and 45 m-2, which indicates that 45 m-2 is the optimal stocking density for fry to fingerlingrearing of B. carnaticus. Keywords:Carnatic carp, Puntius carnaticus, Seed rearing,Species diversification","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":null,"pages":null},"PeriodicalIF":0.5,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139333948","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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