Length-weight relationship of 13 middle Uruguay River basin species,Southern Brazil |
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| Authors: | Marthoni Vinicius Massaro Juliana Felden Lucas Adriano Pachla Débora Alessandra Antonetti David Augusto Reynalte-Tataje |
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| Affiliation: | 1. Universidade Federal da Fronteira Sul. Av. Jacob Reinaldo Haupenthal, Cerro Largo, Brazil;2. Pontifícia Universidade Católica do Rio Grande do Sul. Av. Ipiranga, Porto Alegre, Brazil |
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| Abstract: | Length-weight relationship (LWRs) were determined for 13 fish species from the Uruguay River. The fish were caught in six locations and sampled at each location during each season, totaling 72 samplings, starting in May 2016 and ending in February 2018. Various materials were used such as gillnets (15; 20; 25 30; 40 and 80 mm, triple mesh 150.30.150 150.40.150 and 150.50.150 mm, 8 mm trawl). We also used two longlines, 100 m long, 30 hooks each (hooks 5/0 and 12/0), baited with small fish, corn and snail. Length-weight relationship were adjusted appropriately for all species (r2 > .95). The b values of the LRW equations ranged from 2.38 in Steindachnerina brevipinna to 3.62 in Pimelodus atrobrunneus. |
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