Biochemical‐genetic variation in a wild and a cultured population of the greenshell mussel,<i>Perna canaliculus</i>

Gardner, J. P. A.; Eyles, Rebekah; Pande, Anjali

doi:10.1080/00288330.1996.9516731

Cited by 5 publications

(4 citation statements)

References 18 publications

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“…Beaumont (1994) showed that PGM* and PGI* are not linked in M. edulis. Non-linkage of these two loci was also observed in mussels by Gardner et al (1996), and thus the two loci PGI* and PGM* make independent contributions to the identification of different groups of blue mussels.…”

Section: Discussionmentioning

confidence: 95%

Genotypes of Mytilus from waters of different salinity around Bergen, Norway

Ridgway

Nævdal

2004

Helgol Mar Res

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Samples of Mytilus were collected at eight sites located in and around Bergen, Norway, and analysed by starch gel electrophoresis for the two highly polymorphic loci PGM* and PGI*. The genotype distribution and allele frequencies varied significantly among samples from the different locations. The variations were most significant between localities with full strength seawater and brackish water, and this difference was so large that it indicated the presence of two populations, possibly representing two species. The brackish water mussels may represent the species Mytilus trossulus, while the species Mytilus edulis may be distributed on the outer shores where salinity is normally around 30‰. Differential survival, as a result of specific adaptation to different salinities, may be the mechanism that maintains the populations (or species) and prevents gene flow between them.

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Section: Discussionmentioning

confidence: 95%

Genotypes of Mytilus from waters of different salinity around Bergen, Norway

Ridgway

Nævdal

2004

Helgol Mar Res

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“…Since the 1980s, mussel aquaculture in the study region has used large quantities of wild seed mussels transported from northern New Zealand to facilitate aquaculture expansion that was not possible from seeding with the insufficient locally caught wild seed supply (Dawber 2004). Northern mussels come from a different environment (Ren et al 2019), are genetically distinct from wild mussel populations in the study areas (Gardner et al 1996, Apte et al 2003, and have a different breeding periodicity (Alfaro et al 2001(Alfaro et al , 2003. One or more of these differences may result in an inability of the cultured mussels derived from imported northern seedstock to effectively contribute to larval supply in this non-natal region.…”

Section: Discussionmentioning

confidence: 99%

Expansion of shellfish aquaculture has no impact on settlement rates

Toone

Benjamin

Handley

et al. 2022

Aquacult. Environ. Interact.

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Wild shellfish reefs have been decimated in many parts of the world over the last century, diminishing their vital ecological roles as habitat generators and the ecosystem services they provide, such as water filtration. Over this same timescale, shellfish aquaculture has rapidly expanded to become an impressive global industry with an annual worldwide production worth US$35.4 billion in 2020. Both wild reefs and aquaculture operations typically rely on abundant shellfish settlement levels to maintain their respective populations. At the same time, shellfish aquaculture has the potential to influence settlement, as the addition of cultured shellfish to an ecosystem increases the quantity of reproductive adults and may therefore increase settlement rates. Alternatively, shellfish aquaculture may lead to an overall reduction in settlement in an ecosystem, either directly through cannibalistic consumption of larvae or indirectly by straining carrying capacity. We assessed the role of marine shellfish aquaculture on settlement by comparing changes in the abundance of settling green-lipped mussels Perna canaliculus with the expansion of mussel farms at the north end of New Zealand’s South Island over a 47 yr timespan. Overall, mussel settlement did not increase over this period despite an estimated 16000-fold increase in the number of mussels living in the region as mussel aquaculture proliferated. The disconnect between the extent of mussel settlement and mussel aquaculture was consistent across 3 separate areas within the region, suggesting that aquaculture mussels may be unable to produce larvae capable of settlement and emphasizing the importance of wild mussel populations for ecosystem resilience.

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“…The earliest surveys of population genetic structure in Perna canaliculus employed allozymes (biochemical markers) and reported partial isolation between northern and southern populations at about 38° S (Smith 1988), or an isolation-by-distance population structure (Gardner et al 1996). A subsequent and far larger allozyme survey found no evidence for either the north-south split or the isolation-by-distance results of earlier studies (Apte & Gardner 2001).…”

Section: Genetic Markersmentioning

confidence: 96%

Seaweed utilisation in New Zealand

White

2020

Botanica Marina

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AbstractThe commercial landscape of seaweed use in New Zealand (NZ) has shifted and evolved since it was last reviewed in 2006. One of the largest changes saw the introduction of Macrocystis pyrifera and green-lipped mussel spat (which is landed attached to beach-cast seaweed) into the Quota Management System—the primary tool for commercial fisheries management in NZ. There have also been policy changes around commercial harvesting and farming of Undaria pinnatifida, an introduced brown alga native to Asia. Traditionally, commercial algal utilization has been limited to agar production and beach-cast collection for aquaculture feeds, though demand for seaweed products has increased with a growing Asian population in NZ. The NZ seaweed industry is at an early developmental stage, but it has the potential to offer high quality seaweed stock and value-added products to the world market. The exploration of seaweed farming, the growing demand for seaweed fertilizers and the development of high-value bioactive products such as fucoidan has attracted interest from marine farmers and entrepreneurs. The key to success for the NZ seaweed industry rests in developing high-value products for an export market, from integrated farming, harvesting and processing that can deliver the most value, consume the least energy and generate minimal waste.

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Biochemical‐genetic variation in a wild and a cultured population of the greenshell mussel,Perna canaliculus

Cited by 5 publications

References 18 publications

Genotypes of Mytilus from waters of different salinity around Bergen, Norway

Genotypes of Mytilus from waters of different salinity around Bergen, Norway

Expansion of shellfish aquaculture has no impact on settlement rates

Seaweed utilisation in New Zealand

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