Diet of Chaceon Ramosae (Decapoda, Brachyura) on the southern brazilian exclusive economic zone
Domingos, S.S., Athiê, A.A.R. and Rossi-Wongtschowski, C.L.D. (2008) Diet of Chaceon Ramosae (Decapoda, Brachyura) on the southern brazilian exclusive economic zone. Brazilian Journal of Oceanography, 56 (1). pp. 59-63.
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Among the great variety of species exploited in the Brazilian Exclusive Economic Zone (EEZ), the brachyuran decapods of the genus Chaceon (Geryonidae) stand out for their high commercial value. There are two deep sea crab species inhabiting the southeastern and southern coastal waters of Brazil, Chaceon ramosae Manning, Tavares and Albuquerque, 1989 ("Royal Crab" or "Caranguejo Real") and Chaceon notialis Manning and Holthuis, 1989 ("Red Crab" or "Caranguejo Vermelho").
Crabs of the genus Chaceon are epibenthonic, inhabit muddy and muddy-sandy bottoms between 100 and 2800 m isobaths and are geographically widespread (DEFEO et al., 1992; MANNING ; HOLTHUIS, 1989). There is evidence that the species C. ramosae is restricted to the southern coast off the state of Santa Catarina, Brasil (ATHIÊ ;ROSSI-WONGTSCHOWSKI, 2004).
The diet of adult geryonid crabs has been described by several authors (GRAY, 1970; GERRIOR, 1981; FARLOW, 1980); like many deep-sea organisms these animals present opportunistic feeding habits. Smaller crabs eat fish carcasses, dead squids, sponges, hydroids, gastropod, scaphopods and bivalve mollusks, small polychaete, crustaceans and probably tunicates (FARLOW, 1980). Bigger sized individuals feed upon the same benthic fauna and even on larger prey such as demersal fishes and squids.
Studies on the biology of geryonid crabs inhabiting Brazilian coastal waters are still few. The aim of the present study is to provide preliminary data on the composition of the diet of Chaceon ramosae living in the southern Brazilian EEZ.
|Publication Type:||Journal Article|
|Publisher:||Instituto Oceanográfico da Universidade de São Paulo|
|Copyright:||Creative Commons CC-BY-NC|
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