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Planktonic Duration, Distribution and Population Structure of Western and Central Pacific Damselfishes (Pomacentridae)

Ronald. E. Thresher, Patrick L. Colin and Lori J. Bell
Copeia
Vol. 1989, No. 2 (May 23, 1989), pp. 420-434
DOI: 10.2307/1445439
Stable URL: http://www.jstor.org/stable/1445439
Page Count: 15
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Planktonic Duration, Distribution and Population Structure of Western and Central Pacific Damselfishes (Pomacentridae)
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Abstract

The duration of the planktonic larval stage of Indo-West Pacific damselfishes (Pomacentridae) is inferred from the microstructure of their otoliths and related to the development of morphologically distinct, localized populations and interspecific differences in geographic distribution. Mean duration of the planktonic stage varies between species from 0-37.4 d, differing significantly among species, among genera and among subfamilies. Both morphological and genetic data suggest localized sub-populations are most common in species with planktonic durations less than approximately 15 d. The breadth of a species distribution does not, however, correlate with its planktonic duration. Nonetheless, species with a longer than average planktonic duration are significantly more likely to be distributed on both sides of major barriers to dispersal, such as the western margin of the Pacific Plate. Pacific Plate endemics also tend to have long duration planktonic stages.

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