IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Depth distribution and temperature preferences of wahoo (Acanthocybium solandri) off Baja California Sur, Mexico
Sepulveda, C.A.; Aalbers, S.A.; Ortega-Garcia, S.; Wegner, N.C.; Bernal, D. (2011). Depth distribution and temperature preferences of wahoo (Acanthocybium solandri) off Baja California Sur, Mexico. Mar. Biol. (Berl.) 158(158): 917-926. http://hdl.handle.net/10.1007/s00227-010-1618-y
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162, more
Peer reviewed article  

Available in  Authors 

Keyword
    Marine

Authors  Top 
  • Sepulveda, C.A.
  • Aalbers, S.A.
  • Ortega-Garcia, S.
  • Wegner, N.C.
  • Bernal, D.

Abstract
    The depth distribution and temperature preferences of wahoo (Acanthocybium solandri) were quantified in the eastern North Pacific using archival tags. One hundred and eight data-loggers were deployed on wahoo (105–165-cm fork length) from 2005 to 2008 at three locations off of the coast of Baja California Sur, Mexico (Alijos Rocks, 25°00'N/115°45'W; Magdalena Bay Ridge, 25°55'N/113°21'W; Hurricane Bank, 16°51'N/117°29'W). Twenty-five tagged individuals (23%) were recaptured within close proximity (<20 km) of their release sites. Collectively, depth and temperature data from 499 days revealed a predominant distribution within the upper mixed layer, with an average (±SD) depth of 18 ± 4 m during the day and 17 ± 6 m at night. Wahoo spent 99.2% of the daytime and 97.9% of night above the thermocline, and the greatest depth achieved by any fish was 253 m. Mean dive duration (3.8 ± 2.9 vs. 2.3 ± 0.8 min) and the vertical rate of movement (3.8 ± 1.3 vs. 3.0 ± 0.5 m min-1) were greater at night when compared to day. Ambient temperatures obtained from tag records ranged from 11.1 to 27.9°C, with an average of 25.0 ± 1.1°C. These data identify the importance of the warm, upper mixed layer for the wahoo. High recapture rates proximal to the deployment sites suggest seasonal site fidelity and reveal the economic importance of this resource to both commercial and recreational fisheries of the region.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors