| Registro completo |
| Provedor de dados: |
OceanDocs
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| País: |
Belgium
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| Título: |
Alteraciones de indicadores biológicos de Gambusia puncticulata (Poey, 1854) en sitios muy contaminados del río Almendares
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| Autores: |
Cabrera Páez, Y.
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| Data: |
2014-06-20
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| Ano: |
2007
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| Palavras-chave: |
Fishes
Biological contamination
Eutrophication
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| Resumo: |
Se realizó una investigación con el objetivo de evaluar las alteraciones de los procesos biológicos en los peces que viven en sitios muy contaminados. Se aplicó una metodología basada en los efectos acumulativos de agentes estresantes múltiples a nivel de individuo en la especie Gambusia puncticulata (Poey, 1854). Este estudio se efectuó en tres sitios del río Almendares: El Rodeo, considerado como sitio de referencia, y dos sitios altamente contaminados, el Bosque de La Habana y el Puente 23. Se encontró un incremento en el largo y el peso de las hembras, y en el factor de condición para ambos sexos en los sitios más impactados. Este resultado se atribuye a la mayor disponibilidad de alimento debido a la eutrofización. El índice gonadosomático, el índice de fecundidad específica y el número de embriones por hembra, tuvieron valores significativamente más altos en el sitio de referencia. El largo relativo del gonopodio no mostró diferencia significativa entre sitios. A partir de los indicadores reproductivos analizados, se puede concluir que la reproducción de G. puncticulata se encuentra comprometida en las zonas más contaminadas del río. El índice hepatosomático, presentó valores más altos en las hembras provenientes de los sitios más contaminados. Las diferencias encontradas para δ13 C y δ15 N entre los sitios contaminados y el de referencia sugieren que las fuentes de alimento no son las mismas. La metodología empleada permitió verificar la existencia de alteraciones notables de varios procesos biológicos en peces que fueron colectados en sitios con un grado alto de contaminación.
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| Tipo: |
Theses and Dissertations
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| Idioma: |
Espanhol
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| Identificador: |
http://hdl.handle.net/1834/5516
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| Relação: |
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| Formato: |
105
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| Direitos: |
http://creativecommons.org/licenses/by-nc/3.0/
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