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SEMINAR: MBF602 - Mandy Karnauskas - Friday 1-28-11, 1 pm S/A 103
| From: | "Mandy Karnauskas" <mkarnauskas@rsmas.miami.edu> |
| Subject: | SEMINAR: MBF602 - Mandy Karnauskas - Friday 1-28-11, 1 pm S/A 103 |
| Date: | Wed, 26 Jan 2011 09:33:24 -0500 |
When do fishers’ perspectives correlate with researchers’ perspectives of changes in fish abundance? Marine reserves may produce both ecological and socioeconomic benefits by generating increases in fish abundance. In principle, different indicators of changes in fish abundance, whether derived from biological sampling or human knowledge, should all be correlated. In practice however, indicators are often inconsistent, and researchers and fishers commonly have conflicting opinions on whether reserves are meeting management goals. In this study, we analyze correlations between estimates of changes in fish abundance obtained from underwater visual census (UVC), catch-per-unit-effort (CPUE), and human perceptions, around a no-take marine reserve (Glover's Reef Atoll, Belize). Abundance and biomass estimates from UVC and CPUE were significantly correlated only when the data were collected simultaneously – and over small spatial scales (<20 m). Differences among sampling periods were responsible for the greatest amount of variability within UVC and CPUE sampling methods. Fisher perspectives tended to agree with UVC data to a lesser extent than did perspectives of dive guides and atoll residents. Also, the longer a fisher had been fishing at the site, the less his perceptions tended to agree with the UVC data. Our results indicate that the way fishers perceive changes in abundance may be inherently different from the way researchers measure abundance, and elucidate the circumstances under which CPUE data, UVC data, and human perspectives are correlated. These findings can be used to ensure that reserves meet both biological and socioeconomic management goals. Mandy Karnauskas B.S. Biology, B.S. Animal Science, University of Massachusetts-Amherst (2001) Entered Ph.D. Fall 2006 Advisor: Elizabeth Babcock ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Rosenstiel School of Marine and Atmospheric Science 4600 Rickenbacker Causeway |
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