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Food Supply, Feeding Habits, and Egg Production in Pacific Mole Crabs (Hippa pacifica Dana)

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Title: Food Supply, Feeding Habits, and Egg Production in Pacific Mole Crabs (Hippa pacifica Dana)
Authors: Wenner, Adrian M.
Issue Date: Jan 1977
Publisher: University of Hawaii Press
Citation: Wenner AM. 1977. Food supply, feeding habits, and egg production in Pacific mole crabs (Hippa pacifica Dana). Pac Sci 31(1): 39-47.
Abstract: Well-studied hippid sand crabs (genus Emerita) on wave-washed
beaches in the temperate zone obtain their food by filtering microorganisms from
the water. Related mole crabs (genus Hippa) in the tropics and subtropics have
raptorial feeding appendages, which permit these animals to grasp and feed upon
fresh meat items. They apparently depend upon those organisms that move onto
beaches as a result of wind-driven surface waters. In Hawaii, Portuguese men-of-war
(Physalia) is the most obvious natural food supply, but tests with other types
of bait indicated that shark or squid are equally effective in capturing animals. At
Enewetak Atoll, where Pkysalia occurs only rarely, mole crabs thrive on mysids and
perhaps other similar-sized zooplankton. There also existed a strong correlation
between food availability and egg production, both in Hawaii and at Enewetak
Atoll. In fact, an observed" seasonality" in egg production seemed to be a direct
result of food availability rather than of changes in temperature or photoperiod.
ISSN: 0030-8870
Appears in Collections:Pacific Science Volume 31, Number 1, 1977

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