Studies on triploid oysters in Australia

Hand, R E; Nell, John A.; Thompson, Peter A.

doi:10.1016/j.aquaculture.2003.09.017

Cited by 42 publications

(9 citation statements)

References 24 publications

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“…1). Each replicate consisted of 150 oysters on a half‐tray (Hand, Nell, Reid, Smith & Maguire 1999). Oysters were stocked at 50% tray (0.9 × 1.8 m) coverage throughout the experiment (Holliday, Maguire & Nell 1991).…”

Section: Methodsmentioning

confidence: 99%

Studies on triploid oysters in Australia: farming potential of all-triploid Pacific oysters, Crassostrea gigas (Thunberg), in Port Stephens, New South Wales, Australia

Nell

Perkins

2005

Aquac Research

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Triploid Pacific oysters Crassostrea gigas farmed in Port Stephens, NSW had an exceptionally fast growth rate and reached a whole weight of 55 g in 13 months versus 20 months for diploids. Mortality of the triploids (24.5±2.94%) was significantly lower (P<0.05) than that of the diploids (40.0±2.26%) over the duration of the experiment (July 2002–February 2004). Unfortunately, this advantage was offset by discoloration of the meats of the triploids when they were in better condition than the diploids over summer (October 2003–March 2004). However, discoloration of meat of triploids had cleared up by April 2004 and neither did they suffer this problem from April–September 2003. The triploids also had a lower peak condition than the diploids. Oysters in peak meat condition, i.e. spawning condition, are preferred for the half shell trade in Australia and in this study, there was at least a six‐month period prior to discoloration, when the triploids were large enough and had sufficient meat condition for marketing on the half shell.

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Section: Methodsmentioning

confidence: 99%

Studies on triploid oysters in Australia: farming potential of all-triploid Pacific oysters, Crassostrea gigas (Thunberg), in Port Stephens, New South Wales, Australia

Nell

Perkins

2005

Aquac Research

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“…10 Due to these advantages, polyploid oysters have been induced in several oyster species. [170][171][172][173][174] Triploid oysters have become an important component of global oyster aquaculture.…”

Section: Triploid Breedingmentioning

confidence: 99%

“…Triploid oysters are also sometimes reported to have several advantages over diploids, including greater heterozygosity 168 and greater resistance to diseases 10 . Due to these advantages, polyploid oysters have been induced in several oyster species 170–174 . Triploid oysters have become an important component of global oyster aquaculture.…”

Section: Polyploid Breedingmentioning

confidence: 99%

“…The improvement of growth in triploids reduces the time required to reach market size. Hand et al 170 reported that triploids ( S. glomerata ) were 74% heavier than diploids at 32 months old and reduced the time to market size by at least 10 months (Table S1). According to Nell and Perkins, 175 triploid C. gigas attained market size (55 g) in 13 versus 20 months for diploids 175 (Table S1).…”

Section: Polyploid Breedingmentioning

confidence: 99%

See 1 more Smart Citation

Genetic improvement of oysters: Current status, challenges, and prospects

Jiang,

Chen,

Jiang

et al. 2023

Reviews in Aquaculture

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Oysters are one of the most commercially important shellfish species and have been cultured for thousands of years. Oyster aquaculture supports the major aquaculture industries in many countries. Over the last few decades, the oyster breeding and aquaculture industries have developed rapidly to meet the continually growing demand. Many researchers have made significant efforts toward the genetic improvement of commercially important traits in oysters. Some strains with fast‐growing, disease‐resistant, and stable shell‐colours have been developed through selective breeding. Some hybrid varieties have been developed by crossing different geographical populations or cultivated strains. Several hybrids exhibit considerable genetic variation and improved productive performance. Additionally, polyploid induction technologies have been applied in the oyster aquaculture industry, which provides a useful tool for performance improvement and genetic containment of cultured stocks. At present, the development of molecular breeding also provides a great opportunity for oyster genetic improvement. These advances in oyster breeding have improved the quality of oysters, brought great economic benefits, and been conducive to the sustainability of oyster production. Nonetheless, there are still some limitations and obstacles in oyster breeding, such as infectious diseases, summer mortality, conservation of germplasm resources, environmental contamination, and climate change. The present review provides an overview of the current status, challenges, and prospects in oyster breeding.

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“…Higher growth performance of MI triploid than MII triploids has been reported in several mollusc species (Stanley, Hidu & Allen Jr 1984; Yamamoto & Sugawara 1988; Hawkins, Day, Gerard, Naciri, Ledu, Bayne & Heral 1994). Induction of MI triploid is more difficult than MII triploids due to the lower percentage triploid rate and larval survival (Hand, Nell, Reid, Smith & Maguire 1999), or high proportion of aneuploids and high mortality during MI triploid induction (Guo, Cooper, Hershberger & Chew 1992). Owing to the narrow time window for treatment of fertilized eggs of shrimp, and the fragility of the fertilized eggs at an early stage (Xiang, Clark, Griffin & Hzerzler 1991), no MI triploids in shrimp have been produced as yet.…”

Section: Introductionmentioning

confidence: 99%

Larval metamorphosis and morphological characteristic analysis of triploid shrimp Fenneropenaeus chinensis (Osbeck, 1765)

Zhang

et al. 2006

Aquaculture Res

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Both MI and MII triploids were successfully produced by heat shock in Chinese shrimp Fenneropenaeus chinensis. The inducing conditions for MI and MII triploids were optimized. The highest inducing rate obtained for MI triploids reached more than 90%, and that for MII triploids reached nearly 100% at the nauplius stage as evaluated using £ow cytometry. Comparisons of survival rates at larval stages between triploids and diploids or diploids experiencing treatment and diploids without treatment were performed. At larval stage from nauplii to postlarvae, heat shocks lowered survival at larval stages even if the ploidy was not changed. Ploidy did not a¡ect shrimp larvae survival, and no signi¢cant di¡erence was found in the survival of shrimp larvae between MI and MII triploids. Highly signi¢cant di¡erences were observed in the morphology of triploids and diploids, and no apparent di¡erence was found in the morphology of MI and MII triploids at the grow-out stages. Discriminating formulae for triploid and diploid shrimp at grow-out stage were developed and could be used to distinguish triploids from diploids based on morphological parameters. MI and MII triploids of shrimp have the potential to be used in aquaculture. Comparison of metamorphosis at larval stages among di¡erent kinds of shrimpFour batches of shrimp nauplii including MI, MII triploids and control were cultured separately to the Aquaculture Research, 2006 Metamorphosis and body character of triploid shrimp F Li et al.r

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Studies on triploid oysters in Australia

Cited by 42 publications

References 24 publications

Studies on triploid oysters in Australia: farming potential of all-triploid Pacific oysters, Crassostrea gigas (Thunberg), in Port Stephens, New South Wales, Australia

Studies on triploid oysters in Australia: farming potential of all-triploid Pacific oysters, Crassostrea gigas (Thunberg), in Port Stephens, New South Wales, Australia

Genetic improvement of oysters: Current status, challenges, and prospects

Larval metamorphosis and morphological characteristic analysis of triploid shrimp Fenneropenaeus chinensis (Osbeck, 1765)

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