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National and Regional Research Programs

Team 1: Evolution of Biomineralizations and Adaptations to Environmental Constraints

TALINE 3

2014 to 2017

The objective is to assess qualitative and quantitative existence of metallic composition of the aluminum anodes in the various compartments of harbour environment. From one “zero  state", it will be possible to compare the evolution in the time and to estimate the possible impact of anodes in the natural environment through the analysis of 3 compartments associate: aquatic, sedimentary and biological.

Funders
CCI-CO port de Calais

Project coordinator
Société Accoast

SPONTOX

2013 to 2014

The SPONTOX project suggests to use sponge model as sentinels to the networks of seawater quality monitoring of the littoral environment. Indeed, sponges occur a large part of the qualities required for a bioindicator of pollution. After analyses of contaminant levels, one of the species, Hymeciadon perlevis, revealed best capacity of bioaccumulation.

The Spontox program covers several steps:

Team 1: Evolution of Biomineralizations and Adaptations to Environmental Constraints , Inter-teams

Team 1: Evolution of Biomineralizations and Adaptations to Environmental Constraints , Team 5: Diversity and interactions in coastal ecosystems

Pêcheries de Céphalopodes : outils pour gérer la ressource, préserver le recrutement et valoriser la production

2013 to 2015

English Channel Cephalopods (cuttlefish and squid) are among the most important resources of the Lower Normandy fishery. These stocks are not currently assessed regularly, which is necessary to define the conditions for sustainable exploitation. Among the inshore metiers, the trap fishery, although less destructive of the habitats than the trawling, knows the problem of the eggs fixed on the gear. The best possible value of these resources can also be obtained by optimizing their quality.

Team 2: Reproduction and development of aquatic organisms: evolution, adaptation, regulations

ATM LOCUS

2017 to 2018

Sex determination is a key physiological process of reproduction, essential to the life cycle. The Molluscs belong to the Lophotrochozoa, an important group of the Bilateria, poorly documented on this physiological mechanism.

This project aims to understand the sex determination in 2 Molluscs, the oyster Crassostrea gigas and the cuttlefish Sepia officinalis. These organisms are two species of economic importance, which exhibit very different life cycles and breeding patterns, reflecting the diversity of their phylum.

DEVO-LU puis LEDS

2016 to 2017

The objective of our project, taking place in two steps, is to test the role of the capsule of cuttlefish eggs in the light perception of the embryo. Actually, the influence of light on the development of aquatic organisms is not well known. Eggs of Sepia officinalis, laid in the tidal area, are protected from light by a black capsule. During the experimentation phase, three different photoperiods will be tested on two series of eggs, with and without capsule.

ATM SEPIOM

2015 to 2016

In cephalopod coleoid lineage, sepiids show an internal shell with two distinct parts: dorsal shield and phragmocone. Its mineral composition (aragonite) is well known but organic components, especially proteins, remain to be determined. We propose in this project to 1) identify the proteins  in organic fractions from dorsal shield and phragmocone 2) analyse gene expression of each part of shell sac (dorsal and ventral) and 3) determine if some identified components show similar enzymatic activities to those of other molluscs.

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