Spatio-temporal patterns and environmental controls of small pelagic fish body condition from contrasted Mediterranean areas - Aix-Marseille Université Access content directly
Journal Articles Progress in Oceanography Year : 2017

Spatio-temporal patterns and environmental controls of small pelagic fish body condition from contrasted Mediterranean areas

Pablo Brosset
Virginie Marques
  • Function : Author
Gualtiero Basilone
  • Function : Author
Angelo Bonanno
  • Function : Author
Piera Carpi
  • Function : Author
Fortunata Donato
  • Function : Author
Vanja Čikeš Keč
  • Function : Author
Andrea de Felice
  • Function : Author
Rosalia Ferreri
  • Function : Author
Denis Gašparević
  • Function : Author
Ana Giráldez
  • Function : Author
Ali Gücü
  • Function : Author
Magdalena Iglesias
  • Function : Author
Iole Leonori
  • Function : Author
Isabel Palomera
  • Function : Author
Vjekoslav Tičina
  • Function : Author
Ana Ventero
Barbara Zorica
  • Function : Author

Abstract

Small pelagic fish are among the most ecologically and economically important marine fish species and are characterized by large fluctuations all over the world. In the Mediterranean Sea, low catches and biomass of anchovies and sardines have been described in some areas during the last decade, resulting in important fisheries crises. Therefore, we studied anchovy and sardine body condition variability, a key index of population health and its response to environmental and anthropogenic changes. Wide temporal and spatial patterns were investigated by analyzing separately data from scientific surveys and fisheries in eight Mediterranean areas between 1975 and 2015. Results showed that anchovy and sardine body condition as well as maximum size in some areas sharply decreased in most Mediterranean areas along years (except in the Northern Alboran Sea). Despite this general pattern, well-marked environmental differences between sub-regions were highlighted by several analyses and variations in body condition were not found to be homogeneous over all the Mediterranean Sea. Further, other analyses revealed that except for the Adriatic where major changes towards a lower body condition were concomitant with a decrease in river runoffs and chl-a concentration, no concomitant environmental regime shift was detected in other areas. Together, these analyses highlighted the current poor body condition of almost all small pelagic fish populations in the Mediterranean. Yet, global environmental indices could not explain the observed changes and the general decrease in condition might more likely come from regional environmental and/or anthropogenic (fishing) effects. A prolonged state of poor fish body condition, together with an observed reduced size and early age-at-maturity may have strong ecological, economic and social consequences all around the Mediterranean Sea.

Dates and versions

hal-01621733 , version 1 (23-10-2017)

Identifiers

Cite

Pablo Brosset, Jean-Marc Fromentin, Elisabeth van Beveren, Josep Lloret, Virginie Marques, et al.. Spatio-temporal patterns and environmental controls of small pelagic fish body condition from contrasted Mediterranean areas. Progress in Oceanography, 2017, 151, pp.149 - 162. ⟨10.1016/j.pocean.2016.12.002⟩. ⟨hal-01621733⟩
331 View
0 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More