Reproductive biology of Neotropical tetra fishMimagoniates lateralis(Nichols, 1913) (Characiformes, Characidae), an endangered species of blackwater streams of southeastern Brazil

Autor(es)

de Moraes, Mariana Bissoli ^[1] ; Ferreira, Fabio Cop ^[2] ; Souza, Ursulla Pereira ^[3]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Lab Ictiol Ribeirao Preto LIRP, Fac Filosofia Ciencias & Letras Ribeirao Preto, Ribeirao Preto - Brazil

^[2] Univ Fed Sao Paulo, Programa Posgrad Biodiversidade & Ecol Marinha &, Inst Mar, Campus Baixada Santista, Santos, SP - Brazil

^[3] Univ Santa Cecilia, Programa Posgrad Sustentabilidade Ecossistemas Co, Santos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Studies on Neotropical Fauna and Environment; v. 56, n. 3, p. 234-237, SEP 2 2021.
• Citações Web of Science: 0

Resumo

This study provides for the first time information about the reproductive biology ofMimagoniates lateralis, an endangered species of inseminating Neotropical tetra that occurs in blackwater streams of southeastern Brazil. We analyzed 404 individuals, of which 214 were females, 117 were males, and 73 were immature juveniles. The sex ratio was 1.83 females/males. Males were larger than females. The estimated size at first maturation for females was 22.2 mm SL, and for males 23.4 mm SL. We also analyzed 94 ovaries from mature females, and the estimated absolute fecundity was 116.37 +/- 26.68 oocytes, the oocyte diameter varying from 0.1 to 1.0 mm. The spawning type was classified as multiple, with two modal values corresponding to different oocyte lots. These data contribute to substantiate future assessments of the conservation status ofM. lateralis, as well as future attempts to guarantee the preservation of this species and its natural habitat. (AU)

• Processo FAPESP: 12/51511-2 - Estrutura e dinâmica de comunidades em rios e riachos costeiros da Mata Atlântica, Bacia do Rio Itanhaém (PelD)
• Beneficiário: Antonio Fernando Monteiro Camargo
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Regular