Genetic relations between the bivalves Cardium (Cerastoderma) edule, Cardium lamarcki and Cardium glaucum, studied by means of crossed immunoelectrophoresis

Brock, V.

doi:10.1007/bf00392786

Cited by 21 publications

(17 citation statements)

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“…There are a few criteria for morphological distinction between the two species, but none of them seemed to enable unequivocal separation at all sites of co-occurrence (Brock, 1978;Machado and Costa, 1994). Nevertheless, biochemical criteria and genetic markers are able to clearly distinguish both cockles (Brock, 1978;Brock, 1987;Brock and Christiansen, 1989;Hummel et al, 1994;André et al, 1999;Nikula and Väinölä, 2003;Freire et al, 2005;Ladhar-Chaabouni et al, 2010). Microsatellite primers designed for C. glaucum did not amplify DNA from C. edule, which also proves the separate character of these species (personal observation).…”

Section: Introductionmentioning

confidence: 99%

“…Its distribution is much less fragmented than that of C. glaucum (Brock, 1979(Brock, , 1980, because it prefers sheltered, but open tidal zones. There are several areas where the two cockle species live in sympatry in Portugal (Machado and Costa, 1994), Finland (Rygg, 1970), Germany (Reise, personal communication), Norway, Sweden, Denmark, Netherlands, England and France (Brock, 1987).…”

Section: Introductionmentioning

confidence: 99%

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Comparative phylogeography of two sister (congeneric) species of cardiid bivalve: Strong influence of habitat, life history and post-glacial history

Tarnowska

Krakau

Jacobsen

et al. 2012

Estuarine, Coastal and Shelf Science

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Sister (congeneric) species may exhibit disparate patterns of biogeographic genetic structures due to different life histories and habitat preferences. The common cockle Cerastoderma edule and the lagoon cockle Cerastoderma glaucum probably diverged from their common ancestor in the present territory of Sahara around 5 million years ago. Although it is difficult to separate both species morphologically, various genetic markers, both mitochondrial and nuclear, clearly distinguish them. Furthermore, their lifestyles are different, as C. edule has a much less fragmented coastal habitat and a longer duration of pelagic larval stage than C. glaucum. A comparative genetic analysis was conducted on 17 populations of C. edule and 13 populations of C. glaucum using a 506 bp fragment of mitochondrial DNA (COI). We tested the hypothesis that differences in habitat types and life history are reflected in the genetic structure patterns of these two cockles. Indeed substantial differences in population genetic structures between them are revealed. Genetic diversity within C. glaucum populations decreases northwards as a consequence of post-glacial (re)colonization from southern refugia, while C. edule displays an opposite pattern indicating survival in glacial refuges in the northern Atlantic. Among populations within geographic groups, genetic differentiation is low in C. edule, probably as a result of larval dispersal with coastal currents, while it is extremely high in C. glaucum, best explained by the fragmented habitats. Interestingly, long distance divergence is less expressed in C. glaucum than in C. edule, which supports the speculation that migrating birds (frequently observed in lagoons) may occasionally transport the former more often or more efficiently than the latter. The approach applied in this study (e.g., rarefaction procedure, selection of samples of both species from the same regions) enabled a new and reliable comparative analysis of the existing raw datasets.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative phylogeography of two sister (congeneric) species of cardiid bivalve: Strong influence of habitat, life history and post-glacial history

Tarnowska

Krakau

Jacobsen

et al. 2012

Estuarine, Coastal and Shelf Science

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“…Boyden (1971) but See Brock (1987)l. Both species are conspicuous infaunal components of littoral, muddy-sandy bottoms along the Swedish west coast, in addition to most of the European Atlantic coast (Brock 1979).…”

Section: Introductionmentioning

confidence: 99%

Analysis of the spatial variability in abundance and age structure of two infaunal bivalves, Cerasto-derma edule and C. lamarcki, using hierarchical sampling programs

Lindegarth¹,

Andre²,

Jonsson³

1995

Mar. Ecol. Prog. Ser.

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Spatial variability in abundance and age distnbution of 2 infaunal bivalves, Cerastoderma edule (Linnaeus, 1785) and C. lamarcki (Reeve, 1845), were quantified using hierarchical sampling programs. The scales investigated ranged between 10' and 10' m. Analyses of variance revealed significant vanability in abundance among sites within bays (-100 m apart) for both species and also among bays (-1 km apart) for C. lamarcki. Mean age vaned at several spatiai scales. For both species, however, the scale contributing most to the variation was bays, which provided about 40 % of the total vanation for each species. Randomization procedures were used to test the generality of previous observations of non-random distributions of year classes (namely number of year classes and dorninance by Single year classes). These analyses showed that for both species a spatial unit contained significantly fewer year classes and the most abundant year class was significantly more abundant than expected by chance. These results were consistent for ali spatiai scales except among plots (-10' m apart) in C. lamarcki. The necessity to assess spatial patterns at a wide range of spatial scales is emphasized. Potentially important processes (focusing on larval supply and recruitment) which generate the observed patterns and general implications of spatial vanability are discussed.

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“…The high level of differentiation found in recent studies between the main genetic groups suggested that the taxonomy of Cerastoderma needs revision (Tarnowska et al 2010). Support for a presumed subdivision into a Mediterranean and an Atlantic-Baltic subspecies or species (C. glaucum and C. lamarcki, respectively) has been claimed from immunological (Brock 1987), chromosomal DNA (Brock & Christiansen 1989) and isoenzyme (Hummel et al 1994) differences. Recent studies of C. glaucum populations from the Mediterranean and Atlantic coasts using ITS and COI markers have also shown significant genetic differentiation (LadharChaabouni et al 2010).…”

Section: Discussionmentioning

confidence: 99%

Parasites, pathological conditions and resistance to Marteilia cochillia in lagoon cockle Cerastoderma glaucum from Galicia (NW Spain)

Carballal¹,

Iglesias²,

Darriba³

et al. 2016

Dis. Aquat. Org.

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A histopathological survey revealed parasites and pathological conditions affecting lagoon cockles Cerastoderma glaucum along the Galician coast; serious pathological threats were not detected because the potentially pathogenic conditions (infections with a Marteilia-like parasite and bucephalid sporocysts, disseminated neoplasia and a condition involving large foci of heavy haemocytic reaction) were rare, while more prevalent parasites had negligible or limited pathogeny. Considering that C. edule and C. glaucum are sympatric in some Galician rias, it is remarkable that C. glaucum was not seriously affected by Marteilia cochillia while C. edule suffered an intense outbreak of this parasite associated with massive mortality. Comparison of the digestive gland between cockle species showed co-occurrence of digestive tubules in different phases, with abundant disintegrated tubules, in the case of C. glaucum, while C. edule showed synchronicity and absence of fully disintegrated tubules; these differences could in fluence their susceptibility to M. cochillia because the main location of this parasite in common cockles is the epithelia of the digestive gland. Moreover, the observation of histological sections through the digestive gland easily allows differentiating the 2 cockle species.

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Genetic relations between the bivalves Cardium (Cerastoderma) edule, Cardium lamarcki and Cardium glaucum, studied by means of crossed immunoelectrophoresis

Cited by 21 publications

References 17 publications

Comparative phylogeography of two sister (congeneric) species of cardiid bivalve: Strong influence of habitat, life history and post-glacial history

Comparative phylogeography of two sister (congeneric) species of cardiid bivalve: Strong influence of habitat, life history and post-glacial history

Analysis of the spatial variability in abundance and age structure of two infaunal bivalves, Cerasto-derma edule and C. lamarcki, using hierarchical sampling programs

Parasites, pathological conditions and resistance to Marteilia cochillia in lagoon cockle Cerastoderma glaucum from Galicia (NW Spain)

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