Size-dependent survival of European hake juveniles in the Mediterranean Sea

Type Article
Date 2019-12
Language English
Author(s) Hidalgo Manuel1, 2, Ligas Alessandro3, Maria Bellido Jose4, Bitetto Isabella5, Carbonara Pierluiggi5, Carlucci Roberto6, Guijarro Beatriz1, Jadaud Angelique7, Lembo Giuseppe5, Manfredi Chiara8, Esteban Antonio4, Garofalo Germana9, Ikica Zdravko10, Garcia Cristina2, Gil De Sola Luis2, Kavadas Stefanos11, Maina Irida11, Sion Letizia6, Vittori Stefania12, Vrgoc Nedo13
Affiliation(s) 1 : Inst Espanol Oceanog, Ctr Oceanog Baleares, Muelle de Poniente S-N,Apdo 291, Palma De Mallorca 07015, Spain.
2 : Inst Espanol Oceanog, Ctr Oceanog Malaga, Muelle Pesquero S-N, Malaga 29640, Spain.
3 : Consorzio Ctr Interuniv Biol Marina & Ecol Appl C, Viale N Sauro 4, I-57128 Livorno, Italy.
4 : Inst Espanol Oceanog, Ctr Oceanog Murcia, C Varadero 1, Murcia 30740, Spain.
5 : COISPA Tecnol & Ric, Stn Sperimentale Studio Risorse Mare, Via Trulli 18-20, I-70126 Bari, Torre A Mare, Italy.
6 : Univ Bari Aldo Moro, Dept Biol, Via Orabona 4, I-70121 Bari, Italy.
7 : IFREMER, LHM, UMR MARBEC Marine Biodivers Exploitat & Conservat, Ave Jean Monnet, F-34203 Sete, France.
8 : Univ Bologna, Dipto BiGeA, Lab Biol Marina & Pesca Fano, Viale Adriatico 1-N, I-61311 Fano, PU, Italy.
9 : CNR, Ist Ambiente Marino Costiero, Mazara Del Vallo, TP, Italy.
10 : Univ Montenegro, Inst Marine Biol, POB 69, Kotor 85330, Montenegro.
11 : HCMR, IMBRIW, 46-7 Km Athens,Sounio Ave POB 712, Athens 19013, Greece.
12 : Univ Cagliari, Dept Life & Environm Sci, Via T Fiorelli 1, I-09126 Cagliari, Italy.
13 : Inst Oceanog & Fisheries, Setaliste Ivana Mestrovica 63, Split 21000, Croatia.
Source Scientia Marina (0214-8358) (Consejo Superior Investigaciones Cientificas-csic), 2019-12 , Vol. 83 , N. S1 , P. 207-221
DOI 10.3989/scimar.04857.16A
Keyword(s) juvenile survival, European hake, Mediterranean Sea, size dependence
Abstract

Most studies on European hake focus on the recruitment process and nursery areas, whereas the information is comparatively limited on the ecology of the juvenile stage (ca. second year of life)-the one most exploited by the Mediterranean trawl fisheries. Using information of the MEDITS programme, we provide a spatial and temporal assessment of the influence of body size and growth on hake survival from recruits (age 0) to juveniles (age 1), along with the impact of surface temperature and chlorophyll variability. At a biogeographic scale, size-dependent survival is supported, with areas with higher mean length of recruits and juveniles yielding higher survival. A similar pattern was observed at interannual level in some western Mediterranean areas, also mediated by a density-dependent effect on growth. However, the most recurrent inter-annual pattern was a negative effect of size on survival, which could be attributed to potential ontogenetic changes in catchability and underrepresentation of intra-annual recruitment pulses that are seasonally inaccessible to the MEDITS survey. Results also evidence that survival in the Alboran and Adriatic seas is dependent on the primary production variability, and that Corsica and Sardinia could be potential feeding grounds receiving juveniles from neighbouring areas. The present study reveals the importance of size- and growth-dependent survival in the juvenile stage of European hake in the Mediterranean Sea.

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Hidalgo Manuel, Ligas Alessandro, Maria Bellido Jose, Bitetto Isabella, Carbonara Pierluiggi, Carlucci Roberto, Guijarro Beatriz, Jadaud Angelique, Lembo Giuseppe, Manfredi Chiara, Esteban Antonio, Garofalo Germana, Ikica Zdravko, Garcia Cristina, Gil De Sola Luis, Kavadas Stefanos, Maina Irida, Sion Letizia, Vittori Stefania, Vrgoc Nedo (2019). Size-dependent survival of European hake juveniles in the Mediterranean Sea. Scientia Marina, 83(S1), 207-221. Publisher's official version : https://doi.org/10.3989/scimar.04857.16A , Open Access version : https://archimer.ifremer.fr/doc/00600/71229/