Reproductive Strategy of the Freshwater Pearl Mussel Margaritifera margaritifera

Bauer, G.

doi:10.2307/5077

Cited by 169 publications

(158 citation statements)

References 17 publications

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“…Salmon parr dominated in the examined mussel-populated rapid sections of the rivers, whereas trout was absent. This observation is in contrast to the host use of freshwater pearl mussel in central Europe, where brown trout is the preferred or only available host (Geist et al, 2006;Bauer, 1987).…”

Section: Discussioncontrasting

confidence: 67%

“…The mussel larvae (glochidia) must encyst on the gills of salmonids to develop, with juveniles being the preferred hosts. Glochidia attach themselves to gill filaments and become encapsulated in a cyst formed by the host (Young and Williams, 1984;Bauer, 1987;Ziuganov et al, 1994). This phase of larval development involves metamorphosis and a transfer of nutrients from the host to the mussel (Taeubert et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…The focus is usually on the hosts on which the glochidia specialize -Atlantic salmon and brown trout -as well as on the response of the host to the infection (Young and Williams, 1984;Bauer, 1987;Geist et al, 2006). There is also no agreement on how pathogenic the glochidia are while residing on juvenile salmonids (Cunjak and McGladdery, 1991).…”

Section: Introductionmentioning

confidence: 99%

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The characteristics of the infection of juvenile Atlantic salmon with glochidia of the freshwater pearl mussel in rivers of Northwest Russia

Ieshko

Geist²,

Мурзина

et al. 2016

Knowl. Manag. Aquat. Ecosyst.

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-The decline of freshwater pearl mussel (Margaritifera margaritifera L.) populations is globally well documented, but there is a lack of knowledge concerning the status of the species and its interaction with host fishes in the rivers of the White and Baltic Seas. This study aimed to identify the host fish of pearl mussel in four rivers of Karelia (Northwest Russia), to analyse the duration of the parasitic phase, and the susceptibility of fish hosts to the infestation. Juvenile sea-migrating and land-locked Atlantic salmon (Salmo salar L.) were identified as the most important hosts. In the Keret' River, reduced numbers of juvenile Atlantic salmon are likely to result in a decline of pearl mussel. This problem does not appear to be present for the other three studied rivers. Pearl mussel glochidia were mostly found in yearlings (0+), whereas older fish were infected less, suggesting a more complex pattern of host use than commonly expected. The remote location of Karelian pearl mussel rivers, the high number of pearl mussels in them, and their rather pristine state all suggest that these rivers have a high conservation priority. The importance of Atlantic salmon as a host fish and the emerging declines of Atlantic salmon populations, e.g., in the Keret' River, suggest that the sustaining of this host species should have a high conservation priority. Key-words:Margaritifera margaritifera / Salmo salar / glochidial infestation / host fish Résumé -Les caractéristiques de l'infestation de saumons atlantiques juvéniles par des glochidies de la moule perlière d'eau douce dans les rivières de la Russie du Nord-Ouest. Le déclin des populations de la moule perlière (Margaritifera margaritifera L.) est globalement bien documenté, mais il y a un manque de connaissances concernant le statut de l'espèce et son interaction avec les poissons hôtes dans les rivières des mers Blanche et Baltique. Cette étude visait à identifier les poissons hôtes de la moule perlière dans quatre rivières de la Carélie (Ouest de la Russie), pour analyser la durée de la phase parasitaire, et la sensibilité des poissons hôtes à l'infestation. Les juvéniles de saumon atlantique migrants ou land-locked (Salmo salar L.) ont été identifiés comme les hôtes les plus importants. Dans la rivière Keret', la réduction du nombre de saumons atlantiques juvéniles est susceptible d'entraîner une baisse de la moule perlière. Ce problème ne semble pas être présent pour les trois autres rivières étudiées. Les glochidies de moule perlière ont été principalement trouvés dans les poissons de l'année (0+), tandis que les poissons plus âgés ont été moins infectés, ce qui suggère un modèle de l'utilisation des hôtes plus complexe que généralement prévu. L'éloignement des rivières de Carélie à moules perlières, le nombre élevé de moules perlières présentes, leur état plutôt vierge suggèrent que ces rivières ont une haute priorité de conservation. L'importance du saumon atlantique comme poisson hôte et les baisses en cours des populations de saumon de l'Atlantiqu...

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Section: Discussioncontrasting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The characteristics of the infection of juvenile Atlantic salmon with glochidia of the freshwater pearl mussel in rivers of Northwest Russia

Ieshko

Geist²,

Мурзина

et al. 2016

Knowl. Manag. Aquat. Ecosyst.

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“…3). As in other freshwater bivalves, the sexes of M. margaritifera are usually separate but females were observed to become hermaphrodites at low population densities (Bauer, 1987a). The complex reproductive strategy of freshwater pearl mussels is marked by a high fertility resulting in a single female producing several million larvae (glochidia) per year (Young & Williams, 1984).…”

Section: Percentage Of Total [%]mentioning

confidence: 99%

“…Glochidial rejection is not only limited to non-host fish. Many fish hosts become progressively resistant to glochidial infection (Young & Williams, 1984;Bauer & Vogel, 1987;Ziuganov et al, 1994). It remains uncertain whether pearl mussels can be considered to be parasites only, as their host fish may benefit from the reduced suspended organic material in river water by filter-feeding by the mussels.…”

Section: Percentage Of Total [%]mentioning

confidence: 99%

Strategies for the conservation of endangered freshwater pearl mussels (Margaritifera margaritifera L.): a synthesis of Conservation Genetics and Ecology

2010

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Freshwater pearl mussels (Margartifera margaritifera L.) are among the most critically threatened freshwater bivalves worldwide. The pearl mussel simultaneously fulfils criteria of indicator, flagship, keystone and umbrella species and can thus be considered an ideal target species for the process conservation of aquatic ecosystem functioning. The development of conservation strategies for freshwater pearl mussels and for other bivalve species faces many challenges, including the selection of priority populations for conservation and strategic decisions on habitat restoration and/or captive breeding. This article summarises the current information about the species' systematics and phylogeny, its distribution and status as well as about its life history strategy and genetic population structure. Based on this information, integrative conservation strategies for freshwater mollusc species which combine genetic and ecological information are discussed. Holistic conservation strategies for pearl mussels require the integration of Conservation Genetics and Conservation Ecology actions at various spatial scales, from the individual and population level to global biodiversity conservation strategies. The availability of high resolution genetic markers for the species and the knowledge of the critical stages in the life cycle, particularly of the most sensitive post-parasitic phase, are important prerequisites for conservation. Effective adaptive conservation management also requires an evaluation of previous actions and management decisions. As with other freshwater bivalves, an integrative conservation approach that identifies and sustains ecological processes and evolutionary lineages is urgently needed to protect and manage freshwater pearl mussel diversity. Such research is important for the conservation of freeliving populations, as well as for artificial culturing and breeding techniques, which have recently been or which are currently being established for freshwater pearl mussels in several countries.

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A new record of the freshwater pearl musselMargaritifera margaritifera L. (Bivalvia, Unionoida) from the River Narcea (Asturias, north-western Spain)

lvarez-Claudio¹,

Garca-Rovs²,

Ocharan³

et al. 2000

Aquatic Conserv: Mar. Freshw. Ecosyst.

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Reproductive Strategy of the Freshwater Pearl Mussel Margaritifera margaritifera

Cited by 169 publications

References 17 publications

The characteristics of the infection of juvenile Atlantic salmon with glochidia of the freshwater pearl mussel in rivers of Northwest Russia

The characteristics of the infection of juvenile Atlantic salmon with glochidia of the freshwater pearl mussel in rivers of Northwest Russia

Strategies for the conservation of endangered freshwater pearl mussels (Margaritifera margaritifera L.): a synthesis of Conservation Genetics and Ecology

A new record of the freshwater pearl musselMargaritifera margaritifera L. (Bivalvia, Unionoida) from the River Narcea (Asturias, north-western Spain)

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