Biochemical composition and energy value of<i>Crassostrea gigas</i>(Thunberg) cultured in the bay of Marennes-Oléron

Deslous-Paoli, Jean-Marc; Héral, Maurice

doi:10.1051/alr:1988024

Cited by 91 publications

(55 citation statements)

References 18 publications

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“…This may be because the presence of M. orientalis in quantity in the intestinal tract of molluscs can interrupt the intestinal transit and cause an alimentary spoilation (His 1977). This spoilation is thought to induce a decrease of energetic reserves, constituted mainly by glycogen (Deslous-Paoli & Heral 1988). A loss of glycogen was not found in the present study; however, many studies find that parasites have a noticeable impact on the host only in times of low food availability and other stresses (Hepper 1955, His 1977.…”

Section: Discussioncontrasting

confidence: 56%

Impact of the copepod Mytilicola orientalis on the Pacific oyster Crassostrea gigas in Ireland

Steele¹,

Mulcahy²

2001

Dis. Aquat. Org.

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Infections of a population of Crassostrea gigas by the copepod Mytilicola orientalis were examined at an oyster growing site at Dungarvan, County Waterford, Ireland. Twenty-one samples, each consisting of 20 to 30 oysters have been examined over 2 yr. Condition, sex, reproductive stage, length, weight, glycogen content and other parasite burdens of the oysters were examined in relation to the degree of infection of M. orientalis; 14.38% of oysters were infested. Mean abundance was 0.6 oyster -1. The maximum number of copepods in an oyster was 20. M. orientalis had no effect on condition, growth, sex, stage or glycogen content of the oyster but correlated with shell burrowing by Polydora sp. KEY WORDS: Crassostrea gigas · Mytilicola orientalis · CopepodResale or republication not permitted without written consent of the publisher

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Section: Discussioncontrasting

confidence: 56%

Impact of the copepod Mytilicola orientalis on the Pacific oyster Crassostrea gigas in Ireland

Steele¹,

Mulcahy²

2001

Dis. Aquat. Org.

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“…Cáceres-Martinez & Figueras (1998) also found no difference in gonad development of the mussel Mytilus galloprovincialis between 2 and 5 m depths. Deslous-Paoli & Heral (1988) demonstrated that seasonal variations in reproductive condition and biochemical composition of the oyster Crassostrea gigas could be affected by cultivation density (i.e. relative food availability), in addition to temperature.…”

Section: Discussionmentioning

confidence: 99%

Prevalence and infection intensity of the ovarian parasite Marteilioides chungmuensis during an annual reproductive cycle of the oyster Crassostrea gigas

Ngo¹,

Berthe²,

Choi³

2003

Dis. Aquat. Org.

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“…On the European Atlantic coast, it has spread further to the Netherlands and Ireland (Stock 1993;Holmes and Minchin 1995) and has also been introduced with C. gigas into the Mediterranean Sea (Clantzig 1989). Although it was initially feared that M. orientalis could initiate an epidemic similar to the one assumed with M. intestinalis in 1949-1951, this has not yet been observed, and harm to the host C. gigas seems to be small (Deslous-Paoli and Héral 1988;De Grave et al 1995;Steele and Mulcahy 2001).…”

Section: Introductionmentioning

confidence: 99%

Alien parasitic copepods in mussels and oysters of the Wadden Sea

et al. 2010

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Molluscan intestinal parasites of the genus Mytilicola, specifically M. intestinalis, were initially introduced into bivalves in the North Sea in the 1930s. It was presumably introduced from the Mediterranean with ship-fouling mussels, then attained epidemic proportions in Mytilus edulis in the 1950s and is now widely established in the North Sea region. Mytilicola orientalis was cointroduced with Pacific oysters to France in the 1970s and in the southern North Sea in the early 1990s. Its main host Crassostrea gigas has massively invaded the Wadden Sea with a concomitant decline in mussels. To explore whether introduced mytilicolid parasites could play a role in the shifting dominance from native mussels to invasive oysters, we analysed 390 mussels and 174 oysters collected around the island of Sylt in the northern Wadden Sea. We show that M. intestinalis has a prevalence [90% and a mean intensity of 4 adult copepods in individual mussels with[50 mm shell length at all sheltered sites. By contrast, none were found in the oysters. However, at one site, we found M. orientalis in C. gigas with a prevalence of 10% and an intensity of 2 per host individual (August 2008).This constitutes the most northern record in Europe for this Pacific parasite until now. Alignments of partial sequences of the mitochondrial cytochrome oxidase I (COI) gene and the nuclear internal transcribed spacers (ITS) and 18S rDNA sequences each show a distinct difference between the two species, which confirms our morphological identification. We suggest that the high parasite load in mussels compared to oysters may benefit the continued expansion of C. gigas in the Wadden Sea.

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Biochemical composition and energy value ofCrassostrea gigas(Thunberg) cultured in the bay of Marennes-Oléron

Cited by 91 publications

References 18 publications

Impact of the copepod Mytilicola orientalis on the Pacific oyster Crassostrea gigas in Ireland

Impact of the copepod Mytilicola orientalis on the Pacific oyster Crassostrea gigas in Ireland

Prevalence and infection intensity of the ovarian parasite Marteilioides chungmuensis during an annual reproductive cycle of the oyster Crassostrea gigas

Alien parasitic copepods in mussels and oysters of the Wadden Sea

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