10.5061/DRYAD.6JK98
Brosset, Pablo
University of Montpellier
Lloret, Josep
University of Girona
Muñoz, Marta
Institut de Recherche pour le Développement
Fauvel, Christian
French Research Institute for Exploitation of the Sea
Van Beveren, Elisabeth
French Research Institute for Exploitation of the Sea
Marques, Virginie
French Research Institute for Exploitation of the Sea
Fromentin, Jean-Marc
French Research Institute for Exploitation of the Sea
Ménard, Frédéric
French National Centre for Scientific Research
Saraux, Claire
French Research Institute for Exploitation of the Sea
Data from: Body reserves mediate trade-offs between life history traits:
new insights from small pelagic fish reproduction
Dryad
dataset
2016
Sardina pilchardus
Engraulis encrasicolus
anchovy
sardine
Maternal Effect
2016-10-05T17:36:19Z
2016-10-05T17:36:19Z
en
https://doi.org/10.1098/rsos.160202
30583 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Limited resources in the environment prevent individuals from
simultaneously maximizing all life-history traits, resulting in
trade-offs. In particular, the cost of reproduction is well known to
negatively affect energy investment in growth and maintenance. Here, we
investigated these trade-offs during contrasting periods of high versus
low fish size and body condition (before/after 2008) in the Gulf of Lions.
Female reproductive allocation and performance in anchovy (Engraulis
encrasicolus) and sardine (Sardina pilchardus) were examined based on
morphometric historical data from the 1970s and from 2003 to 2015.
Additionally, potential maternal effects on egg quantity and quality were
examined in 2014/2015. After 2008, the gonadosomatic index increased for
sardine and remained steady for anchovy, while a strong decline in mean
length at first maturity indicated earlier maturation for both species.
Regarding maternal effects, for both species egg quantity was positively
linked to fish size but not to fish lipid reserves, while the egg quality
was positively related to lipid reserves. Atresia prevalence and intensity
were rather low regardless of fish condition and size. Finally,
estimations of total annual numbers of eggs spawned indicated a sharp
decrease for sardine since 2008 but a slight increase for anchovy during
the last 5 years. This study revealed a biased allocation towards
reproduction in small pelagic fish when confronted with a really low body
condition. This highlights that fish can maintain high reproductive
investment potentially at the cost of other traits which might explain the
present disappearance of old and large individuals in the Gulf of Lions.
Fichier Dryad
NW Mediterranean
Gulf of Lions