Vertical distributions of dolphinfish (Coryphaena hippurus) in the Eastern Pacific Ocean suggest variability in potential associations with floating objects

Author:

Ortega-Garcia SofiaORCID,Perle Christopher R.,Whitney Nicholas M.,Rodriguez-Sanchez Ruben,O’Sullivan John,Koch Stephanie SnyderORCID

Abstract

Floating objects play a pivotal role in pelagic ecosystems by serving as shelters, meeting points, cleaning stations, nurseries, and feeding grounds. The abundance of these objects is increasing globally in the form of flotsam, plastics, discarded or lost fishing gear, and fish aggregating devices (FADs) deployed by commercial fisheries. However, it is difficult to measure how often and in what ways fish interact with floating objects in pelagic environments. Dolphinfish (Coryphaena hippurus) is prevalent among the fish species that associate with floating objects, but the extent to which dolphinfish utilize them is unclear. This study applies existing knowledge of FAD-associated dolphinfish diving behavior to identify periods of potential association with floating objects in a remote telemetry dataset of 23 fish with a total of 678 days at liberty spanning two distinct regions within the Eastern Pacific Ocean. Fish inhabiting waters off the western coast of Baja California Sur, Mexico spent significantly more time exhibiting behavior indicative of association with floating objects than those off the coast of Oaxaca, Mexico. When not exhibiting this behavior, dolphinfish in both regions occupied similar vertical habitats, with western Baja fish utilizing more of the water column than Oaxaca fish. Observed regional differences in behavior were coincident with regional differences in size (Oaxaca fish fork lengths ranged from 103 to 118 cm (mean = 110 cm), while Baja fish ranged from 85 to 106 cm (mean = 93 cm)). Although larger fish in the Baja region displayed behavior consistent with smaller Baja fish, future studies should investigate whether the observed regional differences are due to (i) size, (ii) sex, (iii) oceanography, or (iv) availability of floating objects. Dolphinfish are an important mid-trophic level predator and potentially sustainable fishery resource. Understanding their behavior and use of floating objects is of both ecological and economic importance–particularly in the context of expanding international FAD-based fisheries. Our study suggests dolphinfish spend a large amount of their time exhibiting potential floating object associated behavior, and this could influence their population structure and growth.

Funder

Monterey Bay Aquarium

Publisher

Public Library of Science (PLoS)

Subject

Multidisciplinary

Reference51 articles.

1. Fonteneau A, Pallares P, Pianet R. A worldwide review of purse seine fisheries on FADs Pêche thonière et dispositifs de concentration de poisons. Proceedings of the 1st Symposium on Tuna Fisheries and FADS; 1999 Oct 15–19; Martinique, France. Actes Colloques-IFREMER; 2000. p. 15–35.

2. Drift algae: a contribution to near-shore habitat complexity in the pelagic environment and an attractant for fish;MJ Kingsford;Mar Ecol Prog Ser,1995

3. Biodiversity and habitat characteristics of the bycatch assemblages in fish aggregating devices (FADs) and school sets in the eastern Pacific Ocean;N Lezama-Ochoa;Front Mar Sci,2017

4. Characterizing fish communities associated with drifting fish aggregating devices (FADs) in the Western Indian Ocean using underwater visual surveys;M Taquet;Aquat Living Resour,2007

5. Interspecific trophic relationships among pelagic fish species underneath FADs;S. Deudero;J Fish Biol,2001

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