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Taxonomic Status, Biology, and Distribution of Hawaiian Lentipes, a Diadromous Goby

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Title:Taxonomic Status, Biology, and Distribution of Hawaiian Lentipes, a Diadromous Goby
Authors:Maciolek, J.A.
Date Issued:Oct 1977
Publisher:University of Hawaii Press
Citation:Maciolek JA. 1977. Taxonomic status, biology, and distribution of Hawaiian Lentipes, a diadromous goby. Pac Sci 31(4): 355-362.
Abstract:Three species ascribed to the goby genus Lentipes include two
from Hawaii, L. concolor (Gill 1860) and L. seminudus Gunther (1880), and
one from the Gulf of Guinea, L. bustamantaei Boulenger (1916). The Hawaiian
species were described from single specimens of different sex. Specimens
collected recently provide evidence that Hawaiian Lentipes comprise a single,
sexually dimorphic species. The African species differs significantly and more
nearly resembles Sicydium. Lentipes now must be considered a monotypic
genus (L. concolor) endemic to the Hawaiian archipelago.
The genus is distinguished by weak scalation (2-150 cycloid scales per side
on posterior trunk), five subequa1 and one shorter spine in the first dorsal fin,
16 pectoral rays, and one projecting ossified gill raker on the first arch. The
sexes differ mainly in head shape, relative mouth size, dentition, spacing of
dorsal fins, and coloration. The female is drab; the male is yellow to red
posteriorly and has a white anal fin margin.
Adult Lentipes, omnivorous and growing to nearly 140 mm TL, inhabit
pristine steep-gradient streams. Larvae develop in the ocean and appear at
stream mouths as post1arvae less than 20 mm 10ng.Upstream'migrants are
capable of ascending high waterfalls, where they reach areas of permanent
residence. Surveys located Lentipes in 22 streams (6 percent of the total streams
in the archipelago) but the goby was abundant in only a few of them. Because
of sparse Lentipes populations and incompatibility with past and continuing
habitat degradation, endangered status recognition is recommended.
Appears in Collections: Pacific Science Volume 31, Number 4, 1977

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