Acestrorhynchus lacustris

Acestrorhynchus lacustris

Reino:	Animalia
Filo:	Chordata
Classe:	Actinopterygii
Ordem:	Characiformes
Família:	Acestrorhynchidae
Gênero:	Acestrorhynchus
Espécie:	A. lacustris

Nome binomial

Acestrorhynchus lacustris
(Lütken 1875)

Sinónimos

Xiphorhamphus lacustris (Lütken, 1875)^[1]

O Acestrorhynchus lacustris, popularmente chamado de Peixe-cachorro, Cachorrinho ou Dourado-cachorro, é uma espécie de peixe que habita a bacia do rio São Francisco e do Alto Paraná.^[2] Foi originalmente classificada por Christian Frederik Lütken como sendo do gênero Xiphorhamphus, e nome X. lacustris (Lütken, 1875), nomenclatura sem validade.^[3] Também recebe os nomes de Peixe-cadela, Bicudo, Ueua e Dentuço, ocorrendo no Brasil e Argentina, com registros questionados no Peru.^[1]

Nomenclatura, habitat e comportamento

Os nomes populares são aplicados a todos peixes do gênero Acestrorhynchus e derivam das morfologia da cabeça (alongada e com dentes cônicos). São considerados oportunistas, preferindo ambientes de águas mais lentas, especialmente as margens dos rios ou lagoas próximas, sendo considerada uma espécie importante ecologicamente no controle das espécies forrageiras, sem preferência por presas de alguma espécie. Embora seu tamanho não exceda os 40 cm, tem importância na alimentação das populações ribeirinhas.^[2] O comprimento médio é de 20 cm, e possui pequenas diferenças entre machos e fêmeas.^[1]

Tem hábitos sedentários de migrações curtas, realizando a postura nos ambientes onde vive, com ovos adesivos e baixa fecundidade.^[2]

Características

Tem corpo fusoide, face cônica e terminando na boca alongada com os dentes também cônicos. A nadadeira caudal é bifurcada; a do dorso possui entre dez e onze raios, a do ventre oito e a anal tem de vinte e cinco a trinta e um raios. Bastante semelhante à A. britskii, pode ser diferenciada desta pela mancha umeral que lhe é conspícua.^[2]

Ver também

Referências

↑ ^a ^b ^c Edson Rechi. «Peixe Cachorro (Acestrorhynchus lacustris)». Aquarismo Paulista. Consultado em 18 de março de 2024. Cópia arquivada em 28 de setembro de 2023
↑ ^a ^b ^c ^d Elizângela Maria de Souza; Daniel Ferreira Amaral (Org.); Giancarlo Arraes Galvão; Augusto Luís Bentinho Silva; Aline Alves Ferreira da Rocha; Luanny Rainy de Almeida Silva (2022). «Peixe-cachorro». Peixes do rio São Francisco: nativos, endêmicos e exóticos (e-book). Petrolina: IFSertãoPE. p. 61-65. 133 páginas. ISBN 978-65-89380-08-5. Consultado em 5 de março de 2024. Cópia arquivada (PDF) em 7 de março de 2024
↑ «Synonyms of Acestrorhynchus lacustris» (em inglês). fishbase.org. Consultado em 16 de março de 2024. Cópia arquivada em 4 de maio de 2021

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