Studies on triploid oysters in Australia. 2. Growth, condition index gonad area, and glycogen content of triploid and diploid Pacific oysters, Crassostrea gigas, from oyster leases in Tasmania, Australia

Maguire, Greg B.; Gardner, Nathan C; Nell, John A.; Kent, Greg N.; Kent, Adele S.

doi:10.1016/0044-8486(96)83594-0

Cited by 26 publications

(25 citation statements)

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“…This in turn may represent an energetic advantage for C. gigas, which does not normally reproduce in U.K. waters. Consequently, Pacific oysters can devote more of their energy towards the immune system and growth and this is analogous to the enhanced condition of triploid, and hence sterile, C. gigas when compared with normal diploid individuals (Maguire et al, 1995).…”

Section: Discussionmentioning

confidence: 98%

Response of haemocyte lysosomes to bacterial inoculation in the oysters Ostrea edulis L. and Crassostrea gigas (Thunberg) and the scallop Pecten maximus (L.)

Hauton

Hawkins

Hutchinson

2001

Fish & Shellfish Immunology

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Section: Discussionmentioning

confidence: 98%

Response of haemocyte lysosomes to bacterial inoculation in the oysters Ostrea edulis L. and Crassostrea gigas (Thunberg) and the scallop Pecten maximus (L.)

Hauton

Hawkins

Hutchinson

2001

Fish & Shellfish Immunology

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“…(1994) on Saccostrea commercialis , another shellfish where triploidy has been investigated for farming, and other studies comparing growth between diploids and triploids within the same genus as Crassostrea gigas (e.g. Maguire et al . 1995).…”

Section: Discussionmentioning

confidence: 99%

“…However, breeders have questioned whether triploids grow faster or survive longer under suboptimal conditions, with some data suggesting lower survival (Stanley et al . 1984; see also Maguire et al . 1995 in one site out of three).…”

Section: Introductionmentioning

confidence: 93%

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Influences of triploidy, parentage and genetic diversity on growth of the Pacific oysterCrassostrea gigasreared in contrasting natural environments

et al. 2002

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An increasing number of hypotheses are being proposed to explain the faster growth potential of triploids in molluscs, including their partial sterility or their higher heterozygosity compared to diploids. Triploid advantage however, remains controversial for poorer sites, because of a potential trade-off with survival. These questions were addressed in Crassostrea gigas by deploying meiosis II triploids and their diploid siblings from a single mass spawning of three males and seven females, in two contrasting locations for their trophic resources. One hundred and fifty individuals were sampled at each site after nine months, measured for weight and biochemical composition, and genotyped using three microsatellite and seven allozyme loci. Higher performance was observed at the fast-growing site for all traits except shell weight, and triploids had greater weights and biochemical contents than diploids at harvest. Triploids also grew faster at the poorer site, and showed similar survival rates to diploids at both sites. Triploids had significantly higher average allozyme and microsatellite diversity. However, they performed better for a wide range of individual heterozygosity values, arguing for an advantage of the triploid state per se, that could be due to positive effects on growth of both sterility of triploids with subsequent resource re-allocation and possible faster transcription with three copies of each gene. Despite evidence of very low or no inbreeding in the diploid sample, positive associations between individual allozyme diversity and growth were detected, which explained little but significant amounts of phenotypic variation. These associations were interpreted as direct effects of allozymes, either alone or including epistatic interactions with other loci. In addition, measures of individual distance (mean-d2) specific to microsatellites, were negatively correlated with growth in diploids, indicating possible effects of outbreeding depression between more distant genomes of parents from distinct populations.

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“…Triploids grew significantly more than diploids ( P = 0.018) in line with previous studies showing enhanced growth of triploids (Shpigel et al . Maguire, Gardner, Nell, Kent & Kent ; Goulletquer et al . ; Nell ; Maguire & Nell ; Li, Qin, Li & Benkendorff ).…”

Section: Mean Values ± Se Of Environmental Parameters Recorded At Thementioning

confidence: 99%

Dietary preferences, growth and condition of triploid and diploid Pacific Oysters,Crassostrea gigas(Thunberg), in Little Swanport Estuary, Tasmania, Australia

et al. 2015

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Studies on triploid oysters in Australia. 2. Growth, condition index gonad area, and glycogen content of triploid and diploid Pacific oysters, Crassostrea gigas, from oyster leases in Tasmania, Australia

Cited by 26 publications

References 0 publications

Response of haemocyte lysosomes to bacterial inoculation in the oysters Ostrea edulis L. and Crassostrea gigas (Thunberg) and the scallop Pecten maximus (L.)

Response of haemocyte lysosomes to bacterial inoculation in the oysters Ostrea edulis L. and Crassostrea gigas (Thunberg) and the scallop Pecten maximus (L.)

Influences of triploidy, parentage and genetic diversity on growth of the Pacific oysterCrassostrea gigasreared in contrasting natural environments

Dietary preferences, growth and condition of triploid and diploid Pacific Oysters,Crassostrea gigas(Thunberg), in Little Swanport Estuary, Tasmania, Australia

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