Some reproductive and biometric features of the endangered Gangetic Leaf Fish,Nandus nandus(Hamilton,1822):Implication to the baor fisheries management in Bangladesh

作     者：Md Mahamudul Hasan Mredul Md Rushna Alam Antara Binta Akkas Sadia Sharmin Shib Nath Pattadar Md Lokman Ali 

作者机构：Faculty of FisheriesPatuakhali Science and Technology UniversityDumkiPatuakhali8602Bangladesh School of Environmental and Life SciencesUniversity of New CastleCallaghanNSW2308Australia Department of Coastal Studies and Disaster ManagementUniversity of BarisalBarisal8200Bangladesh School of Environment and Natural ResourcesThe Ohio State UniversityColumbusOH43210USA 

出 版 物：《Aquaculture and Fisheries》 (渔业学报（英文）)

年 卷 期：2021年第6卷第6期

页      面：634-641页

学科分类：090801[农学-水产养殖] 0908[农学-水产] 09[农学] 

基　　金：This study is funded by Patuakhali Science and Technology University research budget supported by University Grants Commission of Bangladesh 

主　　题：Sex ratio Length-length relationship Length-weight relationship GSI Baors 

摘      要：This study reflects the biometric characters of the endangered species Nandus nandus(Hamilton,1822)including sex ratio,length-length relationships(LLRs),and length-weight relationships(LWRs)utilizing the sum of 14 linear variables,various meristic measurements,reproductive biology,and condition factor from the Borni Baor,a large wetland ecosystem of southwestern Bangladesh.A total of 579 specimens of *** have been periodically collected from the Borni Baor throughout the year(January-December,2019)using different traditional fishing *** significant LLRs(r^(2)0.90)values indicate that length parameters are profoundly associated with one *** the LWR formula(W=aL^(b)),higher exponent b values(b3.0)were demonstrating a positive allometric growth with a high correlation coefficient(r^(2)0.94).Moreover,monthly gonadosomatic index and dobriyal index fluctuations suggest the primary breeding season of this fish is from March to *** revealed the breeding time was associated strongly with the rainfall and air temperature(p0.05).The results of our study exposed a cutting-edge biometric feature of this endangered species that would be applicable for fish stock evaluation and making management strategies and conservation policy for this valuable fish resource.