Indian Journal of Fisheries最新文献_第6页

Spatial distribution of fishing intensity of canvas stow net fishing vessels in the East China Sea and the Yellow Sea 东海、黄海帆布拖网渔船捕捞强度的空间分布

IF 0.5 4区农林科学

Indian Journal of Fisheries Pub Date : 2023-03-31 DOI: 10.21077/ijf.2023.70.1.125766-01

引用次数: 1

Effect of stocking density on the survival and growth of tank-reared Deccan mahseer Tor khudree (Sykes, 1849) 放养密度对池养德干马虎生存和生长的影响(Sykes, 1849)

IF 0.5 4区农林科学

Indian Journal of Fisheries Pub Date : 2023-03-31 DOI: 10.21077/ijf.2023.70.1.127811-20

Gangadhar Barlaya, C. H. Raghavendra, K. Anantharaja, B. S. Ananda Kumar, K. Hemaprasanth

{"title":"Effect of stocking density on the survival and growth of tank-reared Deccan mahseer Tor khudree (Sykes, 1849)","authors":"Gangadhar Barlaya, C. H. Raghavendra, K. Anantharaja, B. S. Ananda Kumar, K. Hemaprasanth","doi":"10.21077/ijf.2023.70.1.127811-20","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.1.127811-20","url":null,"abstract":" Deccan mahseer, Tor khudree (Sykes, 1849) is the most popular mahseer species of the Western Ghats. However, informationon optimising stocking density for fingerling rearing is not available for T. khudree. A study was undertaken to evaluate theeffect of stocking density on the growth and survival of the blue-fin mahseer, Tor khudree in fry to fingerling rearing. Fishwere reared for 90 days at stocking densities of 15, 25, 35 and 45 fish m-2 in soil-based 24 m2 masonry tanks. The tanks werefertilised initially with cow dung at 3 t ha-1 and were stocked with fry of T. khudree (mean length 1.31±0.09 cm; weight9.49±0.12 mg) after a week of manuring. A mixture (1:1) of powdered groundnut oil cake and rice bran was fed at 10% ofbody weight to the fish during the first month. Subsequently, fish were fed to satiation with a fishmeal-based sinking pelletedfeed (3 mm, 35% crude protein). The length of fish at harvest ranged from 5.03 to 6.43 cm and weight from 1.39 to 3.47 g.The mean final length, weight, specific growth rate and condition factor were the highest (p<0.05) under 15 m-2 and lowestunder 45 m-2 stocking density. The condition factor remained above 1 under all the treatments. No significant (p>0.05)difference in the survival of fish at harvest was recorded. Fish biomass estimates were higher (p<0.05) at higher stockingdensities. The similar (p>0.05) final length and condition factor between the stocking densities of 15, 25 and 35 m-2 and thehighest fish biomass at 35 m-2 indicate a stocking density of 35 fry m-2 as optimal for fry to fingerling rearing of T. khudree.\u0000Keywords: Blue-fin mahseer, Peninsular carp, Seed rearing, Stocking density","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48635559","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}

引用次数: 0

Impact of skill development trainings on fish farmers’ knowledge and attitude: A case study from Bihar, India 技能发展培训对养鱼户知识和态度的影响：来自印度比哈尔邦的案例研究

IF 0.5 4区农林科学

Indian Journal of Fisheries Pub Date : 2023-03-31 DOI: 10.21077/ijf.2023.70.1.108797-17

S. Argade, G. H. Pailan, B. Mahapatra, S. Dutta, S. Munilkumar, S. Dasgupta, S. Sahoo, D. Singh, G. Krishna, K. A. Martin Xavier

{"title":"Impact of skill development trainings on fish farmers’ knowledge and attitude: A case study from Bihar, India","authors":"S. Argade, G. H. Pailan, B. Mahapatra, S. Dutta, S. Munilkumar, S. Dasgupta, S. Sahoo, D. Singh, G. Krishna, K. A. Martin Xavier","doi":"10.21077/ijf.2023.70.1.108797-17","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.1.108797-17","url":null,"abstract":"Skill development training aims to impart new knowledge and skill as well as build up favourable attitude among trainees.Evaluating the farmers’ knowledge and attitude towards skill development trainings will help to assess effectivenessof training as well as adoption probability of the acquired knowledge/skill. This research paper evaluated the impactof skill development training on fish farmers’ knowledge and attitude, in different districts of Bihar. Primary data werecollected from randomly selected trainees (250 Nos.), using feedback proforma and mobile phonic survey methodology.The first three levels of training evaluation model given by Kirkpatrick and Kirkpatrick were followed for measuring theimmediate impact of skill development training. Data were subjected to descriptive and Z-test statistics. The findingsrevealed that skill development training had significant (p=0.000) positive impact on the knowledge level of trainees.They exhibited favourable attitude towards skill development trainings and would be potential adopters of the acquiredknowledge and skills.\u0000Keywords: Attitude, Fish farmers, Impact evaluation, Kirkpatrick model, Knowledge, Skill development training","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46741851","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}

引用次数: 0

Potassium amendment of inland saline groundwater: Insights into the physiological responses of silver pompano Trachinotus blochii (Lacepede, 1801) at different salinities 内陆含盐地下水的钾改良——对不同盐度条件下银蓬Trachinotus blochii（Lacepede，1801）生理反应的观察

IF 0.5 4区农林科学

Indian Journal of Fisheries Pub Date : 2023-03-31 DOI: 10.21077/ijf.2023.70.1.128657-10

{"title":"Potassium amendment of inland saline groundwater: Insights into the physiological responses of silver pompano Trachinotus blochii (Lacepede, 1801) at different salinities","authors":"","doi":"10.21077/ijf.2023.70.1.128657-10","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.1.128657-10","url":null,"abstract":"A trial was conducted to evaluate the effect of graded levels of potassium (K+) amended inland saline groundwater (ISW) on serum ionic composition, antioxidant and metabolic enzymes [Na+/K+ATPase, Catalase, Superoxide dismutase (SOD), Glutathione peroxidase (GPx), Glutathione S-transferase (GST), Lactate dehydrogenase (LDH), aspartate aminotransferase (AST)] activities of silver pompano, Trachinotus blochii (Lacepede, 1801). The ISW was amended with 100% K+ at 5 ppt (ISW5), 10 ppt (ISW10) and 15 ppt (ISW15) and reconstituted seawater (RSW) with similar salinities (RSW5, RSW10 and RSW15) was employed as a reference medium. Experiment was conducted using completely randomised design. T. blochiijuveniles (1.5±0.5 g) were reared in 300 l capacity circular FRP tanks for 90 days. Fish were fed with commercial extruded floating feed. At the end of experimental period, serum ionic composition, enzymatic profiles and proximate composition were estimated. Results of the study showed that the serum ionic content (K+, Na+, Ca2+ and Mg2+) varied dose-dependently with salinity (p<0.05). Na+/K+ATPase, antioxidant enzymes (Catalase and SOD) and metabolic enzymes (GPx, GST, LDH and AST) showed higher activities at lower salinity (ISW5 and RSW5) compared to fish reared at 10 ppt and 15 ppt ISW. Similarly, proximate composition exhibited significantly (p<0.05) lower protein and lipid content at lower salinity (ISW5 and RSW5) signifying the stress condition at lower salinity. Physiological responses of T. blochii in terms of serum ionic composition, enzymatic profile and proximate composition were optimum at 10 and 15 ppt amended ISW, implying that rearing at 10-15 ppt with 100% K+ amendment of inland saline groundwater is appropriate.\u0000Keywords: Antioxidant activity, Inland saline groundwater, Metabolic enzymes, Potassium amendment, Proximate composition","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47264335","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}

引用次数: 0

Classical morphology and DNA barcoding based identification of freshwater ectoparasite, Argulus foliaceus in rohu Labeo rohita 罗氏沼虾淡水外寄生虫叶阿格的经典形态学和DNA条形码鉴定

IF 0.5 4区农林科学

Indian Journal of Fisheries Pub Date : 2023-03-31 DOI: 10.21077/ijf.2023.70.1.132415-16

Snatashree Mohanty, Mausumee Mohanty, K. Sarma, Tarkeshwar Kumar, Amitav Dey, Paramananda Das, Sanjeeb Kumar Sahoo

{"title":"Classical morphology and DNA barcoding based identification of freshwater ectoparasite, Argulus foliaceus in rohu Labeo rohita","authors":"Snatashree Mohanty, Mausumee Mohanty, K. Sarma, Tarkeshwar Kumar, Amitav Dey, Paramananda Das, Sanjeeb Kumar Sahoo","doi":"10.21077/ijf.2023.70.1.132415-16","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.1.132415-16","url":null,"abstract":"DNA barcoding coupled with classical morphological description have become promising approach for the species levelidentification. In the present study, 278 numbers of rohu Labeo rohita were screened, for Argulus infestation, amongwhich 167 fish (60.07%) were found infested with Argulus. Morphological attributes of the parasites were studied by lightmicroscope (LM) and Scanning Electron Microscope (SEM) which showed dorsoventrally flattened body comprising ofhead, thorax, abdomen, a pair of large compound eyes, suctorial organs with sclerotised support structures and two openingsof spermatheca at posterior end. Posterior incision of abdomen do not reach the mid-line and the cephalo-thoracic carapacehave not extended beyond the beginning of abdomen. Further validation was done using molecular tools for accurateparasite identification. The pair-wise genetic distance value, using Kimura-2 parameter showed a species level variationof 0.001 (1%) with that of A. foliaceus, while 0.083 and 0.052 (i.e. more than 2%) with that of A. indicus and A. japonicusrespectively. Phylogenetic tree generated using Neighbour-Joining (NJ) and Maximum-Likelihood (ML) methods, withKimura-2 parameter were also in agreement with pairwise distance values. The mitochondrial cytochrome c oxidase subunit1 (COI) sequences of A. foliaceus formed one cluster with the present studied samples, whereas sequences of A. japonicusformed a sister group. Integrating morphological and rapid DNA barcoding tools, the species was delineated as A. foliaceus.\u0000Keywords: Argulus foliaceus, COI gene, DNA barcoding, Labeo rohita, Morphology","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44886013","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}

引用次数: 0

A comparative study on optimising the inclusion level of three different oilseed meals/cakes as a fishmeal substitute in the diet of Penaeus monodon Fabricius, 1798 1798年法氏对虾(Penaeus monodon Fabricius)饲料中3种不同油籽粕/饼替代鱼粉添加水平的优化比较研究

IF 0.5 4区农林科学

Indian Journal of Fisheries Pub Date : 2023-03-31 DOI: 10.21077/ijf.2023.70.1.120055-14

V. Rajaram, Dr Jannathulla R, K. Ambasankar, R. Rajendran, R. Kalanjiam, J. S. Dayal

{"title":"A comparative study on optimising the inclusion level of three different oilseed meals/cakes as a fishmeal substitute in the diet of Penaeus monodon Fabricius, 1798","authors":"V. Rajaram, Dr Jannathulla R, K. Ambasankar, R. Rajendran, R. Kalanjiam, J. S. Dayal","doi":"10.21077/ijf.2023.70.1.120055-14","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.1.120055-14","url":null,"abstract":" A 60-day indoor feeding trial was conducted in tanks to optimise the inclusion level of three oilseed meals/cakes, such asgroundnut oil cake (GNC), rapeseed meal (RSM) and sesame oil cake (SOC), in the diet of Penaeus monodon Fabricius,1798. Each test ingredient was included separately at the rate of 0 (control), 2.5, 5, 7.5 and 10% by substituting fishmeal(w/w). The shrimps were hand-fed the respective pellet feed thrice a day in a static condition at the rate of 8% of thetotal biomass and was adjusted based on the intake. Results revealed that RSM-fed groups showed a lower daily growthcoefficient (DGC) (1.27% day-1) than the other two groups (1.29-1.30% day-1). The DGC decreased from 1.40 to 1.09% day-1with increase in inclusion levels from 0 to 10%. Broken line regression indicated that the optimal inclusion level of GNC,SOC and RSM was 5.4, 2.9 and 2.4%, respectively. Digestibility of dry matter, crude protein, as well as of the amino acids,Arg and Met increased by 1.92, 0.72, 4.02 and 4.74%, respectively, at 2.5% inclusion, and the increase was extended upto 5% for His, Leu and Lys. The dietary change did not affect survival and carcass composition, while free amino acidsin shrimp tail muscle varied among the treatments. Results concluded that all three oilseed meals/cakes are potentiallyviable and could substitute dietary fishmeal partially in P. monodon. In contrast, they were ranked as GNC > SOC > RSMaccording to the broken line model.\u0000Keywords: Black tiger shrimp, Carcass composition, Digestibility, Plant proteins, Shrimp feed","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45285351","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}

引用次数: 0

Record of a central Indo-Pacific corallimorph in the Lakshadweep atolls and its competition with the hard corals 印度太平洋中部拉克沙群岛环礁珊瑚形生物的记录及其与硬珊瑚的竞争

IF 0.5 4区农林科学

Indian Journal of Fisheries Pub Date : 2023-03-31 DOI: 10.21077/ijf.2023.70.1.129154-08

{"title":"Record of a central Indo-Pacific corallimorph in the Lakshadweep atolls and its competition with the hard corals","authors":"","doi":"10.21077/ijf.2023.70.1.129154-08","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.1.129154-08","url":null,"abstract":"Coral reefs are disappearing worldwide because of mass bleaching, natural disasters, diseases and anthropogenic stressors.This leaves a large area of unutilised substratum, to which other benthic organisms, like corallimorpharians (CMs),anemones and macroalgae, can move in. In this article, we describe, for the first time, the competition for space betweena CM and the hard corals in Kavaratti Atoll in the Indian Ocean. This is the first reported instance of an invasion of CM inthe entire Lakshadweep Islands. The CM Rhodactis bryoides Haddon and Shackleton, 1893, is identified by morphologicaland molecular analysis. The species has not so far been reported from the western Indian Ocean area. We monitored the rateof invasion for six months to figure out the growth rate of CMs. This area did not have any prominent causative factors forCM outbreaks, such as external disturbances and nutrient enrichment. Yet our study showed that CMs are successful in thecompetition for space. More research needs to be done into the biology of this species, how it interacts with other benthicgroups and how the environment facilitates its spread.\u0000Keywords: Bioinvasion, Coral reefs, Corallimorpharia, Phase shift, Rhodactis bryoides","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48993623","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}

引用次数: 0

Estimation of repeatability and phenotypic correlation of reproductive traits in zebrafish Danio rerio 斑马鱼繁殖性状的重复性和表型相关性估计

IF 0.5 4区农林科学

Indian Journal of Fisheries Pub Date : 2023-03-31 DOI: 10.21077/ijf.2023.70.1.129511-05

M. Anjusha, S. Prakash, A. Kathirvelpandian, M. Sakthivel, N. Kalaiselvi, E. Suresh

{"title":"Estimation of repeatability and phenotypic correlation of reproductive traits in zebrafish Danio rerio","authors":"M. Anjusha, S. Prakash, A. Kathirvelpandian, M. Sakthivel, N. Kalaiselvi, E. Suresh","doi":"10.21077/ijf.2023.70.1.129511-05","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.1.129511-05","url":null,"abstract":"This study was conducted to estimate the repeatability and phenotypic correlation of reproductive traits of zebrafish Danio rerio, in captive condition. Breeding trials were conducted on 10 breeding pairs (2 male:1 female). The data on fecundity, fertility, hatchability and survival rate were recorded. The repeatability values were computed as a measure of consistency using the intra-class correlation coefficient. The repeatability estimates for fecundity, fertility, hatchability of total eggs, hatchability of fertilised eggs, survival rate of total eggs and survival rate of larvae were 0.701, 0.406, 0.336, 0.049, 0.295 and 0.314, respectively. Most of the reproductive traits analysed had moderate repeatability values barring the hatchability of fertilised eggs. The phenotypic correlation was calculated using the Pearson correlation method. The phenotypic correlations of fertility with hatchability of fertilised eggs; hatchability of total eggs; survival rate of total eggs and survival rate of larvae were highly significant (p≤0.01). This study provided valuable information on the consistency of reproductive parameters which would serve as model for conducting research in other fish species.\u0000Keywords: Genetic parameters, Phenotypic correlation, Repeatability, Reproductive traits, Zebrafish","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47584865","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}

引用次数: 0

Price fluctuations and species diversity across fish markets in Kerala 喀拉拉邦鱼市场的价格波动和物种多样性

IF 0.5 4区农林科学

Indian Journal of Fisheries Pub Date : 2023-03-31 DOI: 10.21077/ijf.2023.70.1.105674-18

S. Salim, N. R. Athira, P. V. Sunil, Akhila Kumaran, N. Harshan

{"title":"Price fluctuations and species diversity across fish markets in Kerala","authors":"S. Salim, N. R. Athira, P. V. Sunil, Akhila Kumaran, N. Harshan","doi":"10.21077/ijf.2023.70.1.105674-18","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.1.105674-18","url":null,"abstract":"The fish marketing system of Kerala deserves to be highly efficient as compared to that of the country. The demand-supplygap is ironed by the fish arrivals from the other states and there exists huge price variations of fish identified among thelanding centres, wholesale and retail markets of Kerala. The study analysed the price volatilities and species diversity,across different markets. Results of the study suggest that the supply side constraints and the monopsony conditions ofthe fish markets are the major factors responsible for the high price instability. The prices of low value fish species havenot been stable for several reasons and the prices varied depending on species, seasons and abundance of other fish andfishery products. The study suggests that the development of a Fish Market Price Information System (FMPIS) to act asa decision support system would ensure fish market and price information dissemination about availability, accessibilityand affordability of fish which also enables different stakeholders, mainly fishers in identifying target prices or markets;consumers with rational choices about fish availability and traders with inputs for better marketing efficiency.\u0000Keywords: Market diversity, Marketing efficiency, Price stability, Species diversity","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45353236","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}

引用次数: 0

Biometric evaluation of the freshwater snail Pila globosa (Swainson, 1822) from the river Ganga in Bihar, India 印度比哈尔邦恒河淡水蜗牛Pila globosa（Swainson，1822）的生物特征评价

IF 0.5 4区农林科学

Indian Journal of Fisheries Pub Date : 2023-03-31 DOI: 10.21077/ijf.2023.70.1.125224-03

S. K. Ahirwal, Kamal Sarma, Jaspreet singh, Tarkeshwar Kumar, Vivekanakand Bharti, Deva Narayan, Amrendra Kumar

{"title":"Biometric evaluation of the freshwater snail Pila globosa (Swainson, 1822) from the river Ganga in Bihar, India","authors":"S. K. Ahirwal, Kamal Sarma, Jaspreet singh, Tarkeshwar Kumar, Vivekanakand Bharti, Deva Narayan, Amrendra Kumar","doi":"10.21077/ijf.2023.70.1.125224-03","DOIUrl":"https://doi.org/10.21077/ijf.2023.70.1.125224-03","url":null,"abstract":"Length-frequency distribution, morphometry, length-weight relationship, relative condition factor and sex ratio of the apple snail Pila globosa (Swainson, 1822) were studied from the river Ganga. A total of 922 specimens were collected during July 2020 to June 2021, ranging from 3.53 to 62.99 g and from 16.49 to 59.78 mm (shell length). Length-frequency distribution revealed that more than 50% of male and female specimens were within 35 to 45 mm in length and only few (1.58%) female specimens were observed in the higher length (>55 mm). Females have significantly longer shells and are heavier than males. Shell length has the strongest correlation with shell width (r=0.974) and the least with penultimate whorl length (r=0.855). Length-weight relationship, indicated that the species has negative allometric growth (b<3). The relative condition factor was 1.07 for males, 1.00 for females and 1.01 for pooled data. Sex ratio (M:F) statistically deviated from the hypothetical ratio of 1:1, indicating a heterogeneous snail population (1:1.9, p<0.05). Keywords: Ganga River, Growth pattern, Shell morphology, Snail Sex ratio","PeriodicalId":50372,"journal":{"name":"Indian Journal of Fisheries","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43020801","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}

引用次数: 0