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MORPHOLOGICAL ADAPTATION IN THE DEEP-SEA BENTHIC HARPACTICOID COPEPOD FAMILY CERVINIIDAE1) BY PAUL A. MONTAGNA Belle W. Baruch Institute for Marine Biology and Coastal Research and the Department of Biology, University of South Carolina, Columbia, South Carolina 29208, U.S.A. INTRODUCTION Por (1964) suggested that deep-sea harpacticoids were adapted to an "epipelic way of life", by means of a "gradual elongation of limbs". To test this hypothesis I examined four closely related Arctic species to determine if such a predicted gradient of morphological characteristics exists with increasing depth. , The deep-sea macrobenthos is highly diverse (Sanders & Hessler, 1969), and harpacticoid copepod assemblages follow this trend (Coull, 1972). Species and genera from the family Cerviniidae are often dominant members of deep-sea benthic copepod communities (Brodskaya, 1963; Por, 1964; Por, 1969; Coull, ' 1972; Dinet, 1977; Montagna & Carey, 1978). Thus, members of the Cerviniidae are especially good for testing hypotheses about the deep-sea. In general, deep-sea harpacticoids are found patchily distributed at cm and m scales (Thistle, 1978), in agreement with Jumar's (1975) "grainmatching model". Disturbance/predation is probably also important in structuring these communities since harpacticoids are negatively correlated with the presence of sessile surface-deposit feeding polychaetes (Thistle, 1979). In this
Crustaceana – Brill
Published: Jan 1, 1982
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