Plazas Gómez, Ramón Alejandro, Saenz, Hector Fabio, Puentes Granada, Vladimir and Sanchez-Ramirez, Claudia (2021) Pelagic and demersal fish identified in the deep region of the Colombian Caribbean. In: Knowledge of marine biodiversity in the deep region of the Colombian Caribbean : Contribution of the oil and gas sector. . Aquabiosfera SAS, Bogatá Colombia, pp. 197-227. ISBN 978-958-52392-6-5

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Abstract

Nekton, defined as a group of organisms capable of moving independently towards tides and marine currents in the water column, is distributed in different depth ranges along the entire Colombian Caribbean Sea. Pelagic and demersal fish assemblages from the Colombian Caribbean offshore region were characterized through horizontal surface (0-200 m) and mid-water (200-1,000 m) longline. On the seabed, sampling with trains of fishing traps were carried out. In addition, this community organisms were identified through direct observation from over nine hours of videos obtained with ROV and 25 transects of nearly three hours each, with drift cameras over the seabed. A total of 257 fishing sets were made between 2014 and 2016, out of which 194 were made with horizontal longlines and 63 with train of fishing traps. 422 individuals of 49 species were caught with horizontal (surface and mid-water) longlines which weighed 5,779.4 kg. Out of these, 335 individuals of 41 species (5,164.7 kg) were caught in the southern Caribbean where the most abundant species was Alepisaurus ferox, followed by Centrophorus squamosusand Thunnus obesus. In the northern Caribbean, 87 individuals of 23 species (614.7 kg) were caught, where the most representative species were in descending order C. squamosus, Coryphaena hippurus and A. ferox. The assemblage structure caught with horizontal longline was significantly different between the surface and mid-water layers. Species that contributed the most to this dissimilarity were C. squamosus and A. ferox. The catch average in the different longline sets and climatic seasons was similar in the northern and southern Caribbean, with no statistically significant variations. The largest catches took place where exploratory drilling platforms were located, which could act as temporary fish aggregating devices. Extreme data in other longline sets could be the result of chance or proximity to the coastal area. The composition of fishing traps catches, which corresponded to 211 individuals of four species and one genus that provided 27.8 kg was linked to the station depth, where species were different in each depth range. Myxine robinsorum species was the most abundant and with the widest range of regional and depth distribution of demersal fish caught. The presence of 14 species and 15 morphotypes, located between 424 m and 2,564 m deep, was recorded from images of the drift camera and video with ROV, two of them are new records for the Colombian Caribbean Sea.

Document Type:	Book chapter
Programme Area:	PA Not Applicable
Research affiliation:	Social Sciences > Deliberation, Valuation and Sustainability
Date Deposited:	04 May 2022 15:31
Last Modified:	04 May 2022 15:31
URI:	http://cris.leibniz-zmt.de/id/eprint/4920

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