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Main Title Emersion in the Mangrove Forest Fish 'Rivulus marmoratus': A Unique Response to Hydrogen Sulfide.
Author Abel, D. C. ; Koenig, C. C. ; Davis, W. P. ;
CORP Author Charleston Coll., SC. Grice Marine Biological Lab. ;Scripps Institution of Oceanography, La Jolla, CA.;Environmental Research Lab., Gulf Breeze, FL.
Year Published 1987
Report Number CONTRIB-68; EPA-R-805469; EPA/600/J-87/061;
Stock Number PB87-212932
Additional Subjects Stress(Physiology) ; Fishes ; Swamps ; Water pollution ; Hydrogen sulfide ; Responses ; Tests ; Concentration(Composition) ; Survival ; Ecology ; Land ; Reprints ; Mangrove forests ; Rivulus marmoratus ; Habitats
Library Call Number Additional Info Location Last
NTIS  PB87-212932 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 8p
The mangrove forest fish Rivulus marmoratus (Cyprinodontidae) has frequently been observed out of water, a phenomenon generally attributed to habitat drying. The authors tested the hypothesis that hydrogen sulfide, a substance characteristically found in their environment, can serve as a stimulus for emersion. In the field the authors found R. marmoratus in water with low to moderate levels (<250 ppb) of H2S. In the laboratory, R. marmoratus leaped from water contaminated with H2S at ecologically relevant concentrations (median response at 123 ppb). Aquatic hypoxia did not induce emersion, but prey capture did. Oxygen consumption by both juveniles and adults decreased significantly in air (27 and 25%, respectively). The results suggest that avoidance of H2S and the ability to survive terrestrial conditions enable this species to permanently occupy an area of the forest unavailable to other fishes.