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Spatio-temporal distribution of recruits (0 group) of Merluccius merluccius and Phycis blennoides (Pisces, Gadiformes) in the Strait of Sicily (Central Mediterranean)

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Abstract

Aspects of the recruitment of hake (Merluccius merluccius L., 1758) and greater fork beard (Phycis blennoides Brunnich, 1768) in the Strait of Sicily (Central Mediterranean) are presented. Data were collected from 1994 to 1999 during the international bottom trawl survey program MEDITS. In view of the available literature on juvenile growth of these two species in the Mediterranean area, a length-based criterion was adopted to separate fish belonging to the 0 group (recruits). Recruit density indices (R/km2) by haul were calculated based upon the likely variability of recruit growth among years and used to study abundance variability and spatial pattern of recruitment and to identify the main nursery areas. Although there was inter-annual variability, two stable areas for M. merluccius were identified on the eastern side of the Adventure Bank and the Malta Bank at depths ranging between 100 and 200 m. The main nursery areas for P. blennoides were deeper (from 200 to 400 m) and two stable nursery areas were identified on the western and eastern side of the Adventure Bank; other nurseries were found in the easternmost part of the Strait in 1998 and 1999. Recruitments of the two species were significantly correlated, with the strongest recruitment occurring in 1998 and 1999 for each species.

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  1. Sezione di Mazara del Vallo dell' IAMC (Istituto per l'Ambiente Marino e Costiero), CNR-IRMA (Istituto di ricerche sulle Risorse Marine e l'Ambiente), Via L. Vaccara, 61 91026 –, Mazara del Vallo (TP), Italy

    F. Fiorentino, G. Garofalo, A. De Santi, G. Bono, G.B. Giusto & G. Norrito

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  1. F. Fiorentino
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  2. G. Garofalo
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Fiorentino, F., Garofalo, G., De Santi, A. et al. Spatio-temporal distribution of recruits (0 group) of Merluccius merluccius and Phycis blennoides (Pisces, Gadiformes) in the Strait of Sicily (Central Mediterranean). Hydrobiologia 503, 223–236 (2003). https://doi.org/10.1023/B:HYDR.0000008485.85468.ef

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