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Volume 45 - Number 2 - 2010
Article

 


Estimation of body size using morphometric relationships of head bones, pectoral fin bones, otoliths and specific body measurements in Merluccius hubbsi in Patagonian waters

Diego González-Zevallos1, Luisa Kuba1 y Atila E. Gosztonyi1

 

1Centro Nacional Patagónico CENPAT-CONICET, Blvd. Brown 2915 (U9120ACF), Puerto Madryn, Chubut, Argentina

 

E-mail: diegue@cenpat.edu.ar

 

Merluccius hubbsi is the fish with the largest distributional range along the Argentinian Shelf and one of the most relevant species in the diet of many top predators in the Southwest Atlantic Ocean. Predictive regression equations were calculated to estimate total length using head and pectoral girdle bones lengths and specific body measurements. The 166 specimens studied were obtained in January and February 2008 by coastal hake trawlers operating at Chubut Province, Argentina. Ln- transformed data gave the best fits in the equations obtained. The present study supports the use of head and pectoral girdle bones as an alternative method to identify M. hubbsi and predict its length

 

Key words: Piscivory, top predators, Argentinian Patagonia

 

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