Reproductive biology of Hypophthalmus edentatus (Pimelodidae) and Brycon amazonicus (Bryconidae) in the Putumayo basin, Loreto region, Peru
DOI:
https://doi.org/10.56926/repia.v3i2.71Keywords:
gonadosomatic index, reproduction, reproductive sizes, sexual maturityAbstract
Fishing is one of the main economic activities in the Putumayo River, despite the little biological information generated on the exploited species. The objective was to characterize the reproductive biology of Hypophthalmus edentatus and Brycon amazonicus in the middle basin of the Putumayo River (Loreto-Peru). A total of 192 specimens of H. edentatus were captured, with an average length and weight of 34,35 cm and 175,9 g, respectively, and 152 specimens of B. amazonicus, with an average length and weight of 30,73 and 175,9 ± 40,6 g, respectively. These specimens were collected between November 2020 and October 2021 in the fishing port and the municipal market of El Estrecho and through exploratory fishing. The size at first sexual maturity (L50) of H. edentatus was 26,5 and 28,3 cm standard length (SL) and maximum gonadosomatic index (GIS) of 1,6% and 0,6% for females and males, respectively. For B. amazonicus, the L50 was 25,1 cm and 24,8 cm LE and maximum IGS of 6,9% and 1,09% E for females and males, respectively. For both species, the average sex ratio was 2:1 (females: males). Based on these results, it is recommended to implement effective strategies for the conservation of both species.
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