Dissertation/Thesis Abstract

Long-term movement patterns of Yellow Snapper (Lutjanus argentiventris) and Leopard Grouper (Mycteroperca rosacea ) at Los Islotes Reserve, Gulf of California
by TinHan, Thomas Christian, M.S., California State University, Long Beach, 2013, 51; 1527347
Abstract (Summary)

Between August 2010 and September 2012, acoustic telemetry was used to monitor movements of 31 Yellow Snapper and 25 Leopard Grouper at Los Islotes reserve, a small rocky reef and reported spawning site for both species in the southwest Gulf of California. Overall, both species exhibited site fidelity to Los Islotes (grouper: present 64 f 30% of days; snapper: 49 ± 30%). Both species frequented rock and wall habitats; though snapper showed greater site attachment to specific portions of the reserve, grouper exhibited greater site fidelity to the entire reserve. Approximately 30% of snapper showed indications of spawning-related migrations elsewhere in the Gulf, though no clear seasonal pattern of migration was found for grouper. The limited degree of spawning-related emigration and moderate-high levels of site fidelity indicate that if properly placed, small reserves such as Los Islotes may yet adequately protect small, resident populations of snapper and grouper.

Indexing (document details)
Advisor: Lowe, Christopher G.
School: California State University, Long Beach
School Location: United States -- California
Source: MAI 52/05M(E), Masters Abstracts International
Subjects: Ecology, Zoology, Aquatic sciences
Keywords: Acoustic telemetry, Behavioral ecology, Marine reserve, Movement patterns, Reef fish
Publication Number: 1527347
ISBN: 978-1-303-76622-0
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