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Team leader Aquaculture

LECOCQ Thomas

LECOCQ Thomas

Maître de Conférences, Habilité(e) à Diriger des Recherches
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Project Aquaculture

Sortir de la monoculture piscicole

Les deux principaux modèles biologiques, le sandre et la perche, et les infrastructures expérimentales de l’équipe

Nos compétences

  • Reproduction and developemental biology
  • Animal physiology
  • Ethology
  • Animal welfare assessment
  • Design, assessment and optimization of aquaculture systems
  • Niche and community modeling
  • Developement of domestication programs

Nowadays, aquaculture is one of the fastest growing food production sectors in the world and continues to exponentially increase its development. However, most of the current production relies on a low number of fish species leading to negative consequences on environment, food security, and economic prospect. We argue that its sustainable development relies on a species diversification of aquaculture production.

In this context, we develop a multi scale approach of fish production. (i) We aim to identify species of interest through identification and analysis of ecological and biological traits relevant for aquaculture : for example, it is possible to compare response of embryos, larvae and breeders to different photoperiods and temperatures which are main abiotic factors implicated in the development of embryos and larvae and in the control of reproductive cycle. (ii) We develop a standardized integrative approach to highlight populations with the highest potential for fish farming at the intraspecific level. Indeed, geographic differentiation can shape genetic, phenotypic and ecologic specificities, affecting the domestication predisposition or the socio-economic attractiveness potential of a particular population.

Sortir de la monoculture piscicole

Les deux principaux modèles biologiques , le sandre et la perche , et les infrastructures expérimentales de l’équipe

Nos compétences

  • Biologie de la reproduction et du développement
  • Physique animale
  • Éthologie
  • Bien-être animal
  • Développement de programme de domestication
  • Conception de système aquacole
  • Modélisation de niches et des communautés

(iii) Agro-ecological approaches may increase the resilience of agro-ecosystems. It is thus important to wonder about the relevance of assembling compatible species. We look forward to develop a functional approach of interspecific interactions in order to identify potential added value of associated species in the same rearing conditions (pond as well as recirculating systems).

Beside these studies up the domestication process, it is also important to better understand consequences of domestication on breeders biology and negative effects upon progeny. Indeed, reproductive function is one of the major functions altered by domestication : lack of reproduction, loss of fertility, embryonic mortality and deformities are currently observed.

We thus determine the effects of rearing conditions and consequences of first generations bred in captivity on reproductive performances, focusing on females which bring the major part of supplies to the first life stages of the progeny. A better understanding of physiological regulations at the level of brain-hypophysis-gonad axis which controls gametogenesis, will lead to cope with these reproduction problems in fish farming. On the other hand, we try to analyze in the oocyte failures of incorporation of molecules (proteins, RNAs, lipids) causing precocious mortalities or embryonic deformities.

Scientific productions DAC

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