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Marginal lagoons: natural nurseries of migratory fish

Authors: Fábio Pereira Arantes; José Enemir Santos; Marcus Túlio Rocha Vieira Bernardes; Nilo Bazzoli; Lucas Marcon;

Marginal lagoons: natural nurseries of migratory fish

Abstract

As lagoas marginais constituem ambiente complexo que potencializa o sucesso reprodutivo das espécies migratórias, fornecendo abrigo e recursos. Nosso estudo avalia o papel dessas lagoas no recrutamento de espécies migratórias no rio Jequitaí. Durante um ano, foram realizadas amostragens mensais em quatro lagoas marginais do rio Jequitaí: Lagoão (LAG), Renero (REN), Buriti (BUR) e Tamatião (TAMA). Foram capturados 1.049 indivíduos pertencentes a sete espécies de peixes migradores: Brycon orthotaenia, Megaleporinus obtusidens, Prochilodus argenteus, Prochilodus costatus, Pseudoplatystoma corruscans, Salminus franciscanus e Salminus hilarii. O comprimento médio dos exemplares capturados foi de 13,6 cm e o peso corporal médio de 80,7 g, evidenciando o predomínio de peixes jovens. A espécie mais representativa em números absolutos foi L. obtusidens (41,47%) enquanto P. costatus foi a mais representativa (24,57%) na biomassa. Salminus hilarii e i apresentaram as menores taxas de aumento do comprimento corporal (1,90 e 2,10, respectivamente). S. franciscanus e M. obtusidens aumentaram seu comprimento em 4 e 3,6 vezes, respectivamente. Além disso, S. franciscanus e M. obtusidens aumentaram seu peso em 81,3 e 102,4 vezes, respectivamente. Os resultados do presente estudo mostraram como as lagoas marginais podem funcionar como grandes berçários para o desenvolvimento e recrutamento de peixes migradores, contribuindo assim para a conservação de peixes de importância comercial e ecológica. Além disso, este estudo reduz a escassez de conhecimento sobre o uso de lagoas marginais por espécies de peixes migradores e destaca a importância desses ambientes.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
gold