Spat supply for mussel farming in Morocco is essentially based on seed capture and collection from natural beds. However, irregularity recruitment exploited areas encountered difficulties during spat operations have led to develop improve reproduction techniques under controlled conditions hatcheries. The present study focused the larvae phase aiming at assessing growth rate varies between diff...

The first attempt to obtain artificials pearls from the black-lip pearl oyster Pinctada margaritifera in French Polynesia dates back 1963. The pearl oyster culture has grown quickly especially since the eighties. This industry is now the first exportation in value of French Polynesia. 19 atolls of the Tuamotu islands have at this time one or more farms and this activity become more and more att...

Pteriid oysters (Pinctada maxima, Pinctada margaritifera, Pinctada albina, Pteria penguin), rock oysters (Saccostrea glomerata, Saccostrea cuccullata, Saccostrea echinata) and representatives of other taxa (Malleidae, Isognomonidae, Pinnidae, Mytilidae, Spondylidae, Arcidae) from the wild, and 4670 hatchery-reared P. maxima, from northern and Western Australia, were examined for parasites and d...

Free space is necessary for larval recruitment in all marine benthic communities. Settling corals, with limited energy to invest in competitive interactions, are particularly vulnerable during settlement into well-developed coral reef communities. This situation may be exacerbated for corals settling into coral-depauperate reefs where succession in nursery microhabitats moves rapidly toward het...

Overharvesting, habitat degradation, and disease have resulted in a century of decline for Atlantic Coast populations of the eastern oyster Crassostrea virginica (Gmelin). The introduction of oysters with superior disease resistance (e.g. oysters from different geographical areas, or genetically improved strains) may be useful in restoration efforts. In 1997 the Oyster Recovery Partnership and ...

We investigated the development of the immune system during the larval stages of the mussel Mytilus galloprovincialis. The ability of trochophore and veliger larvae to phagocytose foreign particles (Escherichia coli and zymosan) was measured. Phagocytosis was detected as early as 24 h post-fertilization (hpf) using flow cytometry and fluorescence microscopy. However, although there was a high b...

Each par t ic le of a con t inuum is assigned a second order tensor which is t a k e n as a measure of the deformat ion of some neighborhood of the part icle, and which is de te rmined by a funct ional depending on the configurations of t h a t neighborhood. Two invar iance restr ict ions are imposed on the funct ional whose values are spat ial s t rain tensors, t h a t is, associated wi th the...

Manipulative field experiments carried out on sheltered rocky shores investigated settlement and post-settlement interactions between Semibalanus balanoides and three species of fucoid canopy algae, Fucus spiralis L., Ascophyllum nodosum (L.) Le Jolis and Fucus serratus L. All three species had a negative effect on settlement and early recruitment of S. balanoides, densities being significantly...

Exposure of Mytilus edulis L. (Molluscs: Bivalvia) to 8 ppb (ppb = 1-lg I ' ) added copper during the vellger larval or post-larval (spat) stages has no significant effects on survivorship or shell growth However, previous exposure to 8 ppb added copper d u r ~ n g the embryo stage significantly Increases veliger growth rate and decreases spat survivorship in a population from the Menal S t r a...