Abstract
The adults of many coral reef fish species are site-attached, and their habitat is selected at the time of settlement by their larvae. The length of the planktonic larval period varies both intra- and interspecifically, and it is unknown how the age and size of larvae may affect their selection of habitat. To investigate the influence of age and size on habitat selection, I collected newly settled Hawaiian domino damselfish, Dascyllus albisella, daily from grids containing three coral species at four locations in Kaneohe Bay, Oahu, Hawaii. I recorded the coral species each fish was collected on, and measured and aged (by otoliths) the collected fish. The results indicate that the coral Pocillopora meandrina was selected by settling fish significantly more than the other two coral species. Younger and smaller larvae selected this coral species more frequently than older/larger larvae. In addition, younger/smaller individuals were found more commonly inside the bay than older/larger settling larvae. Differences in the choice of coral species and location of settlement may be partly due to ontogenetic differences in the sensory capacities of larvae to detect corals, conspecifics, and predators, or to a larval competency period.
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Danilowicz, B.S. The effects of age and size on habitat selection during settlement of a damselfish. Environmental Biology of Fishes 50, 257–265 (1997). https://doi.org/10.1023/A:1007386415643
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DOI: https://doi.org/10.1023/A:1007386415643