Morphological development of larval and juvenile blacktip grouper, <Emphasis Type="Italic">Epinephelus fasciatus</Emphasis> |
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| Authors: | Katsutoshi Kawabe Hiroshi Kohno |
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| Institution: | (1) Tokyo Metropolitan Ogasawara Fisheries Research Center, Chichijima, Ogasawara, Tokyo 100-2101, Japan;(2) Laboratory of Ichthyology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan |
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| Abstract: | The morphological development of larval and juvenile blacktip grouper, Epinephelus fasciatus, was examined using a hatchery-reared series. By about 5 mm body length (BL), the larvae developed characteristic pigmentation
patterns of groupers, such as melanophores on the dorsal part of the gut, on the tips of the second-dorsal and pelvic fin
spines, and on the midpoint of the tail to form a cluster. In addition, characteristic spines of groupers, such as spinelets
on the second-dorsal and pelvic fin spines, and the preopercular angle spine developed by about 6 mm BL. The notochord end
was in the process of flexion in larvae of 6–7 mm BL, by when major melanophores, spines, and jaw teeth started to appear.
After the fin ray counts attained the adult complement at about 14 mm BL, somewhat densely pigmented bands started to appear
on the body. The fish had the five distinct transverse bands and attained adult-like attire at about 40 mm BL when the major
head spines disappeared and body parts in relation to BL became stable. |
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