Abundance, biomass and distribution of demersal fish of the Caribbean Sea of Central América

• Published in: Uniciencia
• Main Authors: Benavides-Morera, Rosario, Campos-Calderón, Fernando
• Other Authors: Universidad Nacional de Costa Rica
• Format: Article in Journal/Newspaper
• Language: Spanish
• Published: HAL CCSD 2019
• Subjects: Central America; Caribbean Sea; demersal; ichthyofauna; continental shelf; América Central; mar Caribe; ictiofauna; plataforma continental; [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph]; [SDV]Life Sciences [q-bio]; Lofoten
• Online Access: https://hal.archives-ouvertes.fr/hal-02946087; https://doi.org/10.15359/ru.33-1.1

International audience A total of 96 sampling points were analyzed on board the B/O Miguel Oliver from January 3 to February 3, 2011. At each sampling point, trawling operations were carried out using a Lofoten network. The trawls of 30 minutes each were performed in 25 equidistant transects and divided into strata according to local depth, up to a maximum of 1500 m. A total of 142 species of bony and cartilaginous fish (n = 28074) belonging to 73 different families were found and analyzed. Relative abundance, biomass and catch frequency were determined. Antigoniacombatia showed the highest abundance (58.5%), Centrophorusgranulosus reported the most representative biomass in the study (10.9%), and Nezumiaaequalis was the most frequent species (32.6%). In addition, the spatial distribution in possible assemblages of the fish as a response to depth was studied. The cluster analysis (Mantel test r = 0.86; p <0.05), nonparametric spatial distribution analysis (NMDS) and similarity analysis (ANOSIM) provide sufficient evidence that species were found to be aggregated into spatial patterns with respect to the depth gradient. Se analizaron 96 puntos de muestreo realizados a bordo del B/O Miguel Oliver, desde el 3 de enero hasta el 3 de febrero del 2011. En cada punto se llevaron a cabo faenas de pesca de arrastre utilizando una red Lofoten. Los arrastres de 30 minutos de duración cada uno se efectuaron en 25 transectos equidistantes y divididos en estratos según la profundidad local, hasta un máximo de 1500 m. Se encontraron y analizaron un total de 142 especies de peces óseos y cartilaginosos (n = 28 074) pertenecientes a 73 familias diferentes. Se determinó la abundancia relativa, la biomasa y la frecuencia de las capturas. Antigonia combatia mostró la mayor abundancia (58,5 %), Centrophorus granulosus reportó la biomasa más representativa en el estudio (10,9 %) y Nezumia aequalis fue la especie más frecuente (32,6 %). Además, se estudió el ordenamiento espacial en posibles ensamblajes de los peces como ...