Feeding and reproductive patterns of Astyanax intermedius in a headwater stream of Atlantic Rainforest
Fuente:
Redalyc
Guardado en:
| Autor principal: | |
|---|---|
| Formato: | Artículo científico |
| Lenguaje: | en |
| Publicado: |
Academia Brasileira de Ciências
2015
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1876438531552837632 |
|---|---|
| author | URSULLA P. SOUZA |
| author_facet | URSULLA P. SOUZA |
| contents | Feeding and reproductive patterns of Astyanax intermedius in a headwater stream of Atlantic Rainforest URSULLA P. SOUZA FABIO C. FERREIRA MICHELE A.F. CARMO FRANCISCO M.S. BRAGA Multidisciplinaria (Ciencias Naturales y Exactas) niche width niche overlap spawning type Characidae fishes In this paper, we determined diet composition, reproductive periodicity and fecundity of Astyanax intermedius in a headwater stream of a State Park of an Atlantic rainforest. We also evaluated the influence of rainfall, water temperature and fish size on niche width and niche overlap. Sampling was conducted monthly throughout one year in the Ribeirão Grande stream, southeastern Brazil. Diet consisted of 31 food items with equal contribution of allochthonous and autochthonous items. Females were larger than males, and the mean sizes at first maturation were 4.44 cm and 3.92 cm, respectively. Based on 212 pairs of mature ovaries, the number of oocytes per female ranged from 538 to 6,727 (mean = 2,688.7). Niche width and niche overlap were not related to rainfall nor water temperature and only niche width increased with fish size, suggesting that as fish grow, more items are included in diet. Our results suggested that A. intermedius fit as a typical opportunistic strategist which may explain the prevalence of this species i several isolated headwater basins of vegetated Atlantic forested streams where food resources are abundant and distributed throughout the year. 2015 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32743236021 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.87 |
| format | Artículo científico |
| id | redalyc_32743236021 |
| institution | Redalyc |
| language | en |
| publishDate | 2015 |
| publisher | Academia Brasileira de Ciências |
| spellingShingle | Feeding and reproductive patterns of Astyanax intermedius in a headwater stream of Atlantic Rainforest URSULLA P. SOUZA Multidisciplinaria (Ciencias Naturales y Exactas) niche width niche overlap spawning type Characidae fishes Feeding and reproductive patterns of Astyanax intermedius in a headwater stream of Atlantic Rainforest URSULLA P. SOUZA FABIO C. FERREIRA MICHELE A.F. CARMO FRANCISCO M.S. BRAGA Multidisciplinaria (Ciencias Naturales y Exactas) niche width niche overlap spawning type Characidae fishes In this paper, we determined diet composition, reproductive periodicity and fecundity of Astyanax intermedius in a headwater stream of a State Park of an Atlantic rainforest. We also evaluated the influence of rainfall, water temperature and fish size on niche width and niche overlap. Sampling was conducted monthly throughout one year in the Ribeirão Grande stream, southeastern Brazil. Diet consisted of 31 food items with equal contribution of allochthonous and autochthonous items. Females were larger than males, and the mean sizes at first maturation were 4.44 cm and 3.92 cm, respectively. Based on 212 pairs of mature ovaries, the number of oocytes per female ranged from 538 to 6,727 (mean = 2,688.7). Niche width and niche overlap were not related to rainfall nor water temperature and only niche width increased with fish size, suggesting that as fish grow, more items are included in diet. Our results suggested that A. intermedius fit as a typical opportunistic strategist which may explain the prevalence of this species i several isolated headwater basins of vegetated Atlantic forested streams where food resources are abundant and distributed throughout the year. 2015 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32743236021 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.87 |
| title | Feeding and reproductive patterns of Astyanax intermedius in a headwater stream of Atlantic Rainforest |
| topic | Multidisciplinaria (Ciencias Naturales y Exactas) niche width niche overlap spawning type Characidae fishes |
| url | https://www.redalyc.org/articulo.oa?id=32743236021 |