Stress and adaptation in conservation genetics

Frankham, Richard

doi:10.1111/j.1420-9101.2005.00885.x

Cited by 231 publications

(198 citation statements)

References 43 publications

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“…In this context, studies on genetic polymorphisms that determine the genetic structure of populations and species, utilized to better understand evolutionary, demographic or ecological factors, are very important to the conservation of these groups and constitute an essential field within the genetics of populations and conservation (Eizirik, 1996;Frankham, 2005).…”

Section: Discussionmentioning

confidence: 99%

Genetic polymorphism, molecular characterization and relatedness of Macrobrachium species (Palaemonidae) based on RAPD-PCR

Guerra

Lima²,

Taddei³

et al. 2010

Genet. Mol. Res.

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ABSTRACT. The prawn genus Macrobrachium belongs to the family Palaemonidae. Its species are widely distributed in lakes, reservoirs, floodplains, and rivers in tropical and subtropical regions of South America. Globally, the genus Macrobrachium includes nearly 210 known species, many of which have economic and ecological importance. We analyzed three species of this genus (M. jelskii, M. amazonicum and M. brasiliense) using RAPD-PCR to assess their genetic variability, genetic structure and the phylogenetic relationship between them and to look for molecular markers that enable separation of M. jelskii and M. amazonicum, which are closely related syntopic species. Ten different random decamer primers were used for DNA amplification, yielding 182 fragments. Three of these fragments were monomorphic and exclusive to M. amazonicum or M. jelskii and can be used as specific molecular markers to identify and separate these two species. Similarity indices and a phylogenetic tree showed that M. amazonicum and M. jelskii are closest to each other, while M. brasiliense was the most differentiated species among them; this may be attributed to the different habitat conditions to which these species have been submitted. This information will be useful for further studies on these important crustacean species.

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Section: Discussionmentioning

confidence: 99%

Genetic polymorphism, molecular characterization and relatedness of Macrobrachium species (Palaemonidae) based on RAPD-PCR

Guerra

Lima²,

Taddei³

et al. 2010

Genet. Mol. Res.

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“…Longer-term harmful effects of reduced genetic variation include lowered evolutionary responsiveness (Frankham 2005b). The effective population size (N e , heuristically the number of individual-equivalents making a full contribution to the next generation) at which natural selection would be subsumed by random genetic drift, that is evolution on a trait would cease, occurs when the selection coefficient, s < 1/(2N e ).…”

Section: Fitness Geneticsmentioning

confidence: 99%

Towards modelling persistence of woodland birds: the role of genetics

Sunnucks

2011

Emu - Austral Ornithology

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Abstract. Assessing how environmental change affects the probability of persistence of organisms requires an understanding of dispersal through, and occupation of, landscapes, and the associated demographic outcomes. Projections of differences in persistence probability can then be made under different scenarios of land-use and global environmental change. Rates and distances of dispersal, and demographic change and trajectories, are difficult to measure accurately, but genetic approaches can make major contributions. For two decades the field of molecular ecology has been providing useful life-history information relevant to population management, including key ecological attributes such as disease-resistance and thermal biology, mobility, dispersal and gene flow, habitat connectivity, the spatial and temporal scales of population processes, and demography. Genetic estimators of these factors could be employed to a much greater extent than they are currently. To facilitate this increased use, genetic estimates of functional connectivity (mobility and gene flow of organisms) and demography need to be integrated directly into decision-making processes. Population genetics is well suited to Bayesian approaches, with associated benefits including the ability to consider many factors, and estimation of error and parameter sensitivities. Genetic estimators based on the mobility and reproductive success of individual organisms and their key ecological traits can make unique contributions alongside other types of data into agent-based, spatially explicit modelling approaches of real landscape scenarios at the range of scales needed by managers. Virtually all the tools to do this exist. It is imperative that genetic samples be collected for contemporary and future analyses.

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“…This is especially true for fish species with high mobility, high potential for dispersal during egg and larval stages, and large population sizes (1,2). Accurate estimates of genetic variation in fish populations, both for neutral and adaptive loci, can also suggest unique strategies for stock management and conservation of evolutionary potential in severely exploited fishery resources (3)(4)(5). The assessment of population dynamics, environmentally driven changes, and levels of exploitation in large pelagic fish is crucial for both stock management and conservation of marine ecosystems dominated by these oceanic top predators (6).…”

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confidence: 99%

Spatio-temporal population structuring and genetic diversity retention in depleted Atlantic Bluefin tuna of the Mediterranean Sea

Riccioni

Landi²,

Ferrara³

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

115

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Fishery genetics have greatly changed our understanding of population dynamics and structuring in marine fish. In this study, we show that the Atlantic Bluefin tuna (ABFT, Thunnus thynnus), an oceanic predatory species exhibiting highly migratory behavior, large population size, and high potential for dispersal during early life stages, displays significant genetic differences over space and time, both at the fine and large scales of variation. We compared microsatellite variation of contemporary (n = 256) and historical (n = 99) biological samples of ABFTs of the central-western Mediterranean Sea, the latter dating back to the early 20th century. Measures of genetic differentiation and a general heterozygote deficit suggest that differences exist among population samples, both now and 96-80 years ago. Thus, ABFTs do not represent a single panmictic population in the Mediterranean Sea. Statistics designed to infer changes in population size, both from current and past genetic variation, suggest that some Mediterranean ABFT populations, although still not severely reduced in their genetic potential, might have suffered from demographic declines. The short-term estimates of effective population size are straddled on the minimum threshold (effective population size = 500) indicated to maintain genetic diversity and evolutionary potential across several generations in natural populations.ancient DNA | effective population size | genetic structure | large pelagic fishes | Thunnus thynnus

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Stress and adaptation in conservation genetics

Cited by 231 publications

References 43 publications

Genetic polymorphism, molecular characterization and relatedness of Macrobrachium species (Palaemonidae) based on RAPD-PCR

Genetic polymorphism, molecular characterization and relatedness of Macrobrachium species (Palaemonidae) based on RAPD-PCR

Towards modelling persistence of woodland birds: the role of genetics

Spatio-temporal population structuring and genetic diversity retention in depleted Atlantic Bluefin tuna of the Mediterranean Sea

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