Document Type

Article

Publication Date

2015

DOI

10.1093/icesjms/fsv041

Publication Title

ICES Journal of Marine Science

Volume

72

Issue

(Supplement 1)

Pages

177-184

Abstract

Casitas are artificial shelters used by fishers to aggregate Caribbean spiny lobsters (Panulirus argus) for ease of capture. However, casitas may function as an ecological trap for juvenile lobsters if they are attracted to casitas and their growth or mortality is poorer compared with natural shelters. We hypothesized that juvenile lobsters may be at particular risk if attracted to casitas because they are less able than larger individuals to defend themselves, and do not forage far from shelter. We compared the nutritional condition, relative mortality, and activity of lobsters of various sizes in casitas and natural shelters in adult and juvenile lobster-dominated habitats in the Florida Keys (United States). We found that the ecological effects of casitas are complex and location-dependent. Lobsters collected from casitas and natural shelters did not differ in nutritional condition. However, juvenile lobsters in casitas experienced higher rates of mortality than did individuals in natural shelters; the mortality of large lobsters did not differ between casitas and natural shelters. Thus, casitas only function as ecological traps when deployed in nursery habitats where juvenile lobsters are lured by conspecifics to casitas where their risk of predation is higher. These results highlight the importance of accounting for animal size and location-dependent effects when considering the consequences of habitat modification for fisheries enhancement.

Comments

Web of Science: "Free full-text from publisher."

(c) International Council for the Exploration of the Sea 2015.

Original Publication Citation

Gutzler, B. C., Butler, M. J., & Behringer, D. C. (2015). Casitas: A location-dependent ecological trap for juvenile Caribbean spiny lobsters, Panulirus argus. ICES Journal of Marine Science, 72((Supplement 1)), 177-184. doi:10.1093/icesjms/fsv041

ORCID

0000-0003-3500-0775 (Gutzler), 0000-0002-6052-6659 (Butler)

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