Fluorescence census techniques for the early detection of coral recruits

Baird, A.H., Salih, A., and Trevor-Jones, A. (2006) Fluorescence census techniques for the early detection of coral recruits. Coral Reefs, 25 (1). pp. 73-76.

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Abstract

Many coral recruits are very small and often cryptic at settlement making them difficult to detect with normal census techniques. Here we show that fluorescence census techniques can increase the accuracy of juvenile coral counts in highly fluorescent taxa. Using fluorescent filters at night, counts of coral recruits were 20–50% higher than during the day. Acropora abundances were up to 300% higher, the difference being made up of cryptic individuals, and individuals that were too small to see during the day. Fluorescence techniques will be particularly useful in regions where fluorescent taxa are dominant, such as most Indo-Pacific reefs. The technique offers particular promise to determine the influence of early post-settlement mortality on the ecology of fluorescent taxa, because corals can be detected at the size at which they settle.

Item ID: 4181
Item Type: Article (Research - C1)
ISSN: 1432-0975
Keywords: coral reef; recruitment; settlement; Acropora; fluorescence; mortality
Date Deposited: 24 Sep 2009 07:11
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 100%
SEO Codes: 96 ENVIRONMENT > 9611 Physical and Chemical Conditions of Water > 961104 Physical and Chemical Conditions of Water in Marine Environments @ 100%
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