The abundance, diversity and distribution of small fishes in mangrove and non-mangrove estuaries in warm temperate South Africa

Steven McGregor; Nadine A. Strydom

doi:10.3989/scimar.04744.31A

Autores/as

Steven McGregor Department of Zoology, Nelson Mandela University https://orcid.org/0000-0002-1061-567X
Nadine A. Strydom Department of Zoology, Nelson Mandela University https://orcid.org/0000-0003-4292-8678

DOI:

https://doi.org/10.3989/scimar.04744.31A

Palabras clave:

ictiofauna, uso de los estuarios, juveniles, guardería, reclutamiento, refugio, pneumatóforos

Resumen

El papel de los manglares en la estructuración de las comunidades de peces en regiones tropicales y subtropicales está bien documentado, sin embargo, es poco conocido en las zonas templadas. El estudio investiga la importancia de los manglares de zonas templadas comparando la abundancia, diversidad y distribución de juveniles de peces en estuarios con y sin manglares de Sudáfrica. Se utilizó una red de cerco de 50 m (12 mm de malla) durante tres veranos para muestrear juveniles de peces en cuatro estuarios: Gonubie, Qora, Nahoon y Xhora (los dos últimos con manglares). La abundancia y diversidad de peces mostró una escasa variación entre estuarios, a pesar de la presencia o ausencia de manglares. Los estuarios de las zonas templadas están en los límites de distribución de los manglares y pueden, además, favorecer la supervivencia de los peces. Estos resultados implicarían que la ictiofauna no ha evolucionado todavía en sistemas de manglares en función de las ventajas (ej. alimento, refugio) que pueden proporcionar estos ecosistemas. El estudio de estos hábitats y su valor como refugio de los juveniles de peces es esencial para la conservación de estas especies.

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