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Length-Weight relationship (LWR), Length-Length Relationship (LLR), and well-being factors of Indigenous Fishes from Bakhira, a tropical Ramsar Wetland

In: Israel Journal of Ecology and Evolution
Authors:
Virendra Kumar Department of Fisheries Resource Management, Kerala University of Fisheries and Ocean Studies Kochi, Kerala India
ICAR, National Bureau of Fish Genetic Resources Lucknow, 226002, Uttar Pradesh India

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Rejani Chandran ICAR, National Bureau of Fish Genetic Resources Lucknow, 226002, Uttar Pradesh India

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Ganesan Kantharajan ICAR, National Bureau of Fish Genetic Resources Lucknow, 226002, Uttar Pradesh India

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L.K. Tyagi ICAR, National Bureau of Fish Genetic Resources Lucknow, 226002, Uttar Pradesh India

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Amit Singh Bisht ICAR, National Bureau of Fish Genetic Resources Lucknow, 226002, Uttar Pradesh India

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Ranjan Singh ICAR, National Bureau of Fish Genetic Resources Lucknow, 226002, Uttar Pradesh India

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Ramashankar Sah ICAR, National Bureau of Fish Genetic Resources Lucknow, 226002, Uttar Pradesh India

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Uttam Kumar Sarkar ICAR, National Bureau of Fish Genetic Resources Lucknow, 226002, Uttar Pradesh India

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Rajeev K. Singh ICAR, National Bureau of Fish Genetic Resources Lucknow, 226002, Uttar Pradesh India

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https://orcid.org/0000-0003-3418-6600
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Abstract

This study provides the first analysis of length-weight relationships (LWR), length-length relationships (LLR), and condition factors for nine fish species from Bakhira Wetland, Uttar Pradesh, based on 898 specimens collected via experimental fishing. Species studied include Puntius chola, P. sophore, Pethia ticto, Systomus sarana, Rasbora daniconius, Amblypharyngodon mola, Devario devario, Nandus nandus, and Channa punctata. Analyses assessed whether LWR followed isometric growth (b=3) and LLR showed linearity (b=1), alongside the calculation of condition factors (K, Kn, Ka) and regression parameters (a, b, R2). Three species (P. sophore, A. mola, S. sarana) showed isometric growth, three (P. chola, R. daniconius, C. punctata) positive allometric growth (b>3), and three (P. ticto, N. nandus, D. devario) negative allometric growth (b<3). Most species showed non-isometric LLRs (b≠1), except A. mola, S. sarana, and N. nandus. Condition factor K ranged from 0.832 (R. daniconius) to 1.606 (P. ticto); Kn from 0.999 (R. daniconius) to 1.008 (A. mola); and Ka from 0.35 (R. daniconius) to 1.805 (P. ticto). Results indicate interspecific differences in growth, likely influenced by diet or physiology, offering a valuable baseline for future biological studies, stock assessments, and conservation efforts in the wetland.

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