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FIELD OBSERVATIONS OF THE ECOLOGY AND HABITS OF MANGROVE RIVULUS (RIVULUS MARMORATUS) IN BELIZE AND FLORIDA
Citation:
Davis, W., D. Taylor, AND B. Turner. FIELD OBSERVATIONS OF THE ECOLOGY AND HABITS OF MANGROVE RIVULUS (RIVULUS MARMORATUS) IN BELIZE AND FLORIDA. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-90/371 (NTIS PB91163840), 1990.
Description:
This report provides a synopsis of field studies of Rivulus marmaratus from two population surveys of mangrove islands adjacent to the Belize barrier reef and observations made over fifteen years at several sites in south Florida. his small, cryptically colored killifish is the only known vertebrate selfing hermaphrodite. Florida populations consist nearly exclusively of hermaphrodites (> 99%), while the Belize populations contained a significant proportion (10-25%) of males. ur combined observations demonstrate that this species is not "rare" as previously thought, but elusive and highly adapted to microhabitats within mangrove forests. tandard ichthyological collecting techniques are ineffective in this habitat and have previously failed to reveal the strength of the association of R. marmoratus with the mangral ecosystem.