Ocorrência e aspectos da biologia reprodutiva de Harttia loricariformis (Loricariinae) no trecho inferior do rio Paraíba do Sul (Rio de Janeiro, Brasil)

Authors

  • Márcia Santos de Menezes
  • José Marcelo Rocha Aranha

DOI:

https://doi.org/10.5380/abpr.v27i0.663

Keywords:

<i>Harttia-loricariformis</i>, reproduction, population, população,

Abstract

Analisamos 242 exemplares de Harttia loricariformis no trecho inferior da bacia do no Paraíba do Sul (RJ). A ocorrência da espécie esteve associada ao tipo de ambiente, predominando no rio Grande (42,4% do total dc exemplares capturados), em ambientes de água clara e encachoeirados. Os machos apresentaram comprimentos maiores que as fêmeas, porém machos e fêmeas iniciam o processo de desenvolvimento gonadal com tamanhos semelhantes (10,4 cm machos e 10,0 cm fêmeas). A reprodução foi sazonal, estendendo-se de setembro a fevereiro, principalmente em setembro-outubro. Na época reprodutiva houve predomínio de fêmeas. Análises microscópicas confirmaram desova tipo parcelada.

ABSTRACT

We analysed 242 fishes of Harttia loricariformis from the lower Paraíba do Sul river, Rio de Janeiro state. The occurrence of this species was related to features of the environment. it was preponderance in the Grande river (82.4%), being most frequent in clear water and in rapids. Males were bigger than females, even though both have started the development of their gonads with similar sizes (10.4 cm in males and 10.0 cm in females). The reproduction was seasonal and it happened between September and February, being more intensive in September and October. Females prevailed over males during the reproductive season. The kind of spawning was histologycally confirmed as a multiple spawning.

RÉSUMÉ

Deux-cents quarante deux exemplaires de Harttia loricariformis ont été analysés dans le secteur inférieur du bassin du fleuve Paraíba do Sul, Rio de Janeiro, Brésil. La présence de lespéce est associée aux conditions du milieu; elle est dominante en abondance numérique (82,4%) dans le fleuve Grande, et dans les eaux claires et les rapides. Les mâles sont plus grands que les femeiles, pourtant la taille de primiére rnaturité sexuelle est voisine (10,4 cm et 10,0 cm, respectivement). La ponte est saisonnière et se deroule de septembre à février avec un pic en september-octobre. Durant cette période, la sex-ratio est en faveur des confirmé que la ponte est séquentielle.

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How to Cite

de Menezes, M. S., & Aranha, J. M. R. (1998). Ocorrência e aspectos da biologia reprodutiva de Harttia loricariformis (Loricariinae) no trecho inferior do rio Paraíba do Sul (Rio de Janeiro, Brasil). Acta Biológica Paranaense, 27. https://doi.org/10.5380/abpr.v27i0.663

Issue

Vol. 27 (1998)

Section

Artigos originais (Original Articles)

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