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Latin american journal of aquatic research

On-line version ISSN 0718-560X

Abstract

PALACIOS, Jacqueline et al. Aspects of the biology of Coryphaenoides delsolari Chirichigno & Iwamoto, 1977 off northern Perú . Lat. Am. J. Aquat. Res. [online]. 2009, vol.37, n.3, pp.455-462. ISSN 0718-560X.

In order to determine the abundance, distribution, and population structure of Coryphaenoides delsolari off the northern Perú, the results of two cruises carried out in 2007 and 2008 were analyzed. For this, the swept area method was implemented using bottom trawling from Puerto Pizarro (3°25'S) to Huarmey (10°S ). The study area was divided into three levels between 200 and 1500 m depth. C delsolari was the most representative fish in catches between 500 and 1000 m depth to the north of Pimentel (7°S ). The highest relative abundance was 3,178 kg km-2 and the total biomass was estimated to be 9,669.45 ton (± 4,630.15 ton). The size structure was stratified latitudinally: the lower the latitude, the bigger the fishes. Females were larger than males. Finally, length-weight relationship was found to be negative and allome trie.

Keywords : Coryphaenoides delsolari; biology; biomass; distribution; grenadier; northern Perú.

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