Spatial distribution pattern of European hake, Merluccius merluccius (Pisces: Merlucciidae), in the Mediterranean Sea

Scientia Marina

卷:83

Pierluigi Carbonara¹  Giuseppe Lembo¹  Isabella Bitetto¹  Walter Zupa¹  Alessandro Ligas²  Francesca Capezzuto³  Roberto Carlucci³  Letizia Sion³  Crescenza Calculli⁴  Ioannis Thasitis⁵  Cristina Follesa⁶  Cristina Porcu⁶  Panagiota Peristeraki⁷  George Tserpes⁸  Evgenia Lefkaditou⁹  Zdravko Ikica¹⁰  Igor Isajlovic¹¹  Antonio Esteban¹²  Manuel Hidalgo¹³  José Luis Pérez¹⁴  Beatriz Guijarro¹⁴  Germana Garofalo¹⁵  Chiara Manfredi¹⁶  Angélique Jadaud¹⁷ 

[1] COISPA Tecnologia & Ricerca;

[2] Consorzio per il Centro Interuniversitario di Biologia Marina ed Ecologia Applicata;

[3] Department of Biology, University of Bari;

[4] Department of Economics and Finance, University of Bari;

[5] Department of Fisheries and Marine Research;

[6] Department of Life and Environmental Science, University of Cagliari;

[7] Hellenic Center for Marine Research, Institute of Marine Biological Resources and Inland Waters - University of Crete, Biology Department;

[8] Hellenic Centre for Marine Research, Institute of Marine Biological Resources and Inland Waters;

[9] Institute of Marine Biological Resources & Inland Waters, Hellenic Centre for Marine Research;

[10] Institute of Marine Biology, University of Montenegro;

[11] Institute of Oceanography and Fisheries;

[12] Instituto Español de Oceanografía, Centro Oceanográfico de Murcia;

[13] Instituto Español de Oceanografía, Centro Oceanográfico de Málaga - Instituto Español de Oceanografía, Centro Oceanográfico de les Baleares;

[14] Instituto Español de Oceanografía, Centro Oceanográfico de les Baleares;

[15] Istituto per le Risorse Biologiche e le Biotecnologie Marine, Consiglio Nazionale delle Ricerche;

[16] Laboratorio di Biologia Marina e Pesca di Fano, Dipartimento BIGEA;

[17] MARBEC, Ifremer, Univ Montpellier, CNRS;

关键词: merluccius merluccius;    distribution pattern;    environmental factors;    medits;    mediterranean sea;   

DOI  :  10.3989/scimar.04988.12A

来源: DOAJ

【 摘 要 】

The present study provides updated information on the occurrence, abundance and biomass distribution patterns and length frequencies of Merluccius merluccius in the Mediterranean Sea, by analysing a time series of data from the Mediterranean International Trawl Surveys (MEDITS) from 1994 to 2015. The highest values of abundance and biomass were observed in the Sardinian Seas. The use of a generalized additive model, in which standardized biomass indices (kg km–2) were analysed as a function of environmental variables, explained how ecological factors could affect the spatio-temporal distribution of European hake biomass in the basin. High biomass levels predicted by the model were observed especially at 200 m depth and between 14°C and 18°C, highlighting the preference of the species for colder waters. A strong reduction of biomass was observed since the year 2009, probably due to the strengthening of the seasonal thermocline that had greatly reduced the availability of food. The general decrease in biomass of several stocks of anchovy and sardine, preys of European hake, might be indirectly connected to the decreasing biomass detected in the present study. The length analysis shows median values lower than 200 mm total length of most of the investigated areas.

【 授权许可】

Unknown