Lack of association between genetical and morphological variations for bivalve Arctica islandica from six different sites of the NE Atlantic ocean

Begum, Salma; Brey, Thomas; Held, Christoph

doi:10.1016/j.ecss.2018.06.014

Cited by 2 publications

(3 citation statements)

References 48 publications

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“…This suggests that A. islandica has evolved as a long-lived phenotype (see also Moss et al, 2016), including a peroxidation-protected membrane lipid composition across all populations. Recent data (Begum et al, 2018) show very low genetic differences between A. islandica from the same sites as in our study, suggesting an important degree of phenotypic plasticity instead of local genetic adaptation. Population-specific maximum age seems therefore to be a function environmental challenge, biotic and/or abiotic, including salinity stress in brackish populations.…”

Section: Discussionsupporting

confidence: 73%

“…On the other hand, environmental factors such as food and sunlight availability (Moss et al, 2017), as well as dredging effort (Thorarinsdóttir et al, 2009) could help explain differences in lifespan. Begum et al (2018) used one mitochondrial locus (cytochrome b) to prove that, in spite of their vastly differing MRL, all these populations belong to the same species and hence provide an applicable system to test longevity-associated characters at the intraspecific level.…”

Section: Introductionmentioning

confidence: 99%

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Mitochondrial Traits Previously Associated With Species Maximum Lifespan Do Not Correlate With Longevity Across Populations of the Bivalve Arctica islandica

et al. 2019

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The mitochondrial oxidative stress theory of aging posits that membrane susceptibility to peroxidation and the organization of the electron transport system (ETS) linked with reactive oxygen species (ROS) generation are two main drivers of lifespan. While a clear correlation has been established from species comparative studies, the significance of these characteristics as potential modulators of lifespan divergences among populations of individual species is still to be tested. The bivalve Arctica islandica , the longest-lived non-colonial animal with a record lifespan of 507 years, possesses a lower mitochondrial peroxidation index (PI) and reduced H 2 O 2 efflux linked to complexes I and III activities than related species. Taking advantage of the wide variation in maximum reported longevities (MRL) among 6 European populations (36–507 years), we examined whether these two mitochondrial properties could explain differences in longevity. We report no relationship between membrane PI and MRL in populations of A. islandica , as well as a lack of intraspecific relationship between ETS complex activities and MRL. Individuals from brackish sites characterized by wide temperature and salinity windows had, however, markedly lower ETS enzyme activities relative to citrate synthase activity. Our results highlight environment-dependent remodeling of mitochondrial phenotypes.

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Section: Discussionsupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Mitochondrial Traits Previously Associated With Species Maximum Lifespan Do Not Correlate With Longevity Across Populations of the Bivalve Arctica islandica

et al. 2019

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“…Bivalve mollusks are among the models that have been used to study the correlation between genetic and morphological variation and different factors like localities, environments, and time (Laudien et al 2003, Kong et al 2007, Zieritz et al 2010, Inoue et al 2013, Begum et al 2018, Bonner et al 2019. Bivalve mollusks have a wide geographic distribution, occupy a relatively wide range of environmental conditions, and are relatively abundant (Simpson & Harnik 2009, Lorion et al 2010, besides being animals of commercial importance for coastal communities (Krause et al 2019, Olivier et al 2020.…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal analysis of the genetic and morphological variation of Iphigenia brasiliensis (Mollusca: Bivalvia) from the southwest tropical Atlantic

Gonçalves¹,

Silva²,

Bonner³

et al. 2023

Lat. Am. J. Aquat. Res.

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Iphigenia brasiliensis is a bivalve mollusk exploited as a shellfish and subsistence resource on the Brazilian coast, mainly in the north and northeast regions. Genetic (allozyme electrophoresis revealed eight gene loci) and morphological variations (multivariate morphometry of valves used 13 linear measurements of traditional and 19 Fourier coefficients of geometric morphometry) were studied, considering the geographic (445 km of the southwest tropical Atlantic), environmental (mangroves and channels of communication with the sea of three estuaries in the state of Rio de Janeiro), and temporal dimensions (over two years). I. brasiliensis showed high levels of genetic variation (the average number of alleles per locus ranged from 2.8 to 3.4, and the average heterozygosity ranged from 0.441 to 0.675). Bayesian analysis of population partitioning showed that the highest LnP(D) value was achieved for K = 3. These results indicated mixed ancestry, possibly oscillations in the dispersion dynamics among the different sampling groups, and temporal oscillations in the population sizes due to the anthropogenic influence on the studied estuaries. The results of morphological variation, inferred by the PERMANOVA from the Fourier analysis, indicated that a similar influence might occur in valves (also, the discriminant analysis showed that different groups could be consistently identified). In this sense, the studied populations may be organized in a dynamic of metapopulations. Finally, these are the first data on morphological and genetic variation of the species in the latitudinal, environmental, and temporal dimensions studied simultaneously, thus providing relevant information for the exploration, management, and conservation of this commercially important species.

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Lack of association between genetical and morphological variations for bivalve Arctica islandica from six different sites of the NE Atlantic ocean

Cited by 2 publications

References 48 publications

Mitochondrial Traits Previously Associated With Species Maximum Lifespan Do Not Correlate With Longevity Across Populations of the Bivalve Arctica islandica

Mitochondrial Traits Previously Associated With Species Maximum Lifespan Do Not Correlate With Longevity Across Populations of the Bivalve Arctica islandica

Spatiotemporal analysis of the genetic and morphological variation of Iphigenia brasiliensis (Mollusca: Bivalvia) from the southwest tropical Atlantic

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