Palabras clave
Echinodermata
Isla del Coco
Diadema mexicanum
Costa Rica
density
echinodermata
Diadema mexicanum
Isla del Coco
Cocos Island
Costa Rica
Cómo citar
Resumen
Se describen los patrones de distribución de los equinodermos que habitan en aguas someras (hasta 20 m de profundidad) en diferentes sitios alrededor de la Isla del Coco. Se evaluaron 18 sitios donde se realizaron transectos horizontales a dos profundidades (6 y 15 m) y cuatro verticales de 18 a 0 m de profundidad. Se observó un total de 28 especies de equinodermos. La clase con más especies fue Echinodea con nueve, seguido por Asteroidea con siete, y Ophiuroidea y Holothuroidea con seis especies cada una. Diadema mexicanum fue el único equinodermo presente en todos los sitios y profundidades estudiados. Las mayores densidades se observaron en el Islote Dos Amigos a 6 m de profundidad (6.53 indv/m2), Punta Ulloa (4.37 indv/m2), Roca Sumergida (3.48 indv/m2) e Islote Pájara (2.27 indv/ m2). Diadema ha demostrado en el pasado ser un elemento importante en el balance y recuperación de los ambientes coralinos. Así mismo, este estudio informa por primera vez la presencia en el área del asteroideo Asteropsis carinifera y el pepino de mar Holothuria (Mertensiothuria) fuscocinerea.Citas
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Derechos de autor 2008 Revista de Biología Tropical