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Investigaciones marinas

On-line version ISSN 0717-7178

Abstract

ARANA, Patricio  and  AHUMADA, Mauricio. Razor shrimp (Campylonotus semistriatus), deep-water crustacean off central coast of Chile (Crustacea, Decapoda, Campylonotidae). Investig. mar. [online]. 2006, vol.34, n.1, pp.3-14. ISSN 0717-7178.  http://dx.doi.org/10.4067/S0717-71782006000100001.

During exploratory fishing tasks performed in the continental slope in 2002 and 2003, the presence of the razor shrimp (Campylonotus semistriatus) was detected at depths of 570-682 m (32º10’-34º42’S) and 490-955 m (32º10’-36º00’S) respectively. Cephalothorax lengths between 11 and 37 mm and in 2003 were between 13 and 37 mm, females were larger than males. The variability of average size was explained both by variations in depth and by mean latitude (p < 0.05). Larger individuals toward higher latitudes and between 700 and 800 m depth. Sizes at first sexual maturity were 21.3 and 21.1 mm (cephalothorax length) in 2002 and 2003, respectively. The relationships between length and weight indicated a negative alometry. Catches per unit of area (CPUA) were low, averaging 94.6 and 98.9 kg·km-2 each year. This crustacean, previously reported in the South Atlantic and Pacific as far as 38ºS, is now present in the Pacific up to 32ºS. Because of its low concentrations at the sea bottom, the fish profiled as a complementary resource for nylon shrimp (Heterocarpus reedi) or red royal shrimp (Haliporoides diomedeae)

Keywords : razor shrimp; exploratory fishing; Chile.

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