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The ontogeny of habitat associations in the tropical tiger tail seahorse Hippocampus comes Cantor, 1850
Author(s) -
Morgan S. K.,
Vincent A. C. J.
Publication year - 2007
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2007.01535.x
Subject(s) - biology , reef , ecology , seagrass , habitat , juvenile , coral reef , ontogeny , context (archaeology) , seahorse , marine reserve , fishery , paleontology , genetics
This study examined how habitat associations changed with ontogeny in the tiger tail seahorse Hippocampus comes Cantor, 1850, over four reef zones in a coral reef ecosystem. Hippocampus comes showed ontogenetic differences in their use of habitat at the scale of reef zones (macrohabitat) and holdfasts (microhabitat). Across reef zones, juvenile size classes (25–105 mm standard length, L S ) were most abundant in wild macroalgal beds ( Sargassum spp.) (55·7%), while adults (>105 mm L S ) occupied both coral reefs (39·7%) and macroalgal beds (42·7%). Microhabitat use also varied with ontogeny. Juveniles generally used macroalgal holdfasts, while adults >135 mm L S used a greater diversity of specialized microhabitats that included branching sponges, branching corals and tall seagrass. Ontogenetic changes in habitat association, as well as size‐related shifts in crypsis and aggregation, suggest that H. comes experiences fitness trade‐offs that vary with size; juveniles may associate with habitat that reduces predation, while larger individuals may use distinct microhabitat in reef zones to optimize reproductive success. Results are discussed in the context of targeted exploitation, expanding artisanal mariculture, habitat damage from illegal fishing and reserve design.