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Chronicle of an extinction foretold genetic properties of an extremely small population of Iberolacerta monticola


, : Chronicle of an extinction foretold genetic properties of an extremely small population of Iberolacerta monticola. Conservation Genetics 13(1): 131-142

The fragmentation and destruction of natural habitats by human intervention is producing a continuous and inexorable reduction of the size of populations in multitude of species all over the world. Small and isolated populations face higher extinction risks, due to demographic and environmental stochasticity, and also because of several genetic threats, among which inbreeding is considered the most important one. For many of these species, the extinction of a population is an irreversible event, so that determining the immediate importance of these risk factors and understanding their interactions is crucial for conservation plans. Iberolacerta monticola is a small lacertid endemic to the northwestern Iberian Peninsula, distributed mainly across moderate/high altitude mountainous regions. Some populations are found nearly at sea-level, though, in fluvial valleys with relict Atlantic forests, in the severely fragmented western part of its range. One of them has been dramatically reduced over the last 3 years, and presently is on the brink of extinction. Using microsatellite nuclear markers, we obtained different measures of genetic variation at this site, together with demographic and breeding data. Both the level of heterozygosity and the number of alleles per locus indicate that the level of variation in this population is comparatively high, and the average inbreeding coefficient is very low. Individuals appear healthy and long-lived, and are related by a few different lines of descent. These findings are discussed in the context of current theories and experimental evidence of associative overdominance and purging of the genetic load of populations, with special emphasis on the evolutionary potential of recovery of small evolutionary units.

US$19.90

DOI: 10.1007/s10592-011-0272-3


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Hall, T.S., 1973: The fight against 'flu--the work of the common cold unit. Nursing Mirror and Midwives Journal 136(21): 48-50

Roberts, C.; Fox, N., 1998: General practitioners and the Internet: modelling a 'virtual community'. Electronic discussion lists are used by many groups, including GPs, for communication and information sharing. The technology offers potential for formal learning and professional development. Various models have been proposed to describe the dyna...

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Kleeberg, P., 2014: Health care's digital divide. Minnesota Medicine 96(9): 42-44

Kojima, H.; Yasukochi, G., 1973: Treatment with L-DOPA in two cases of organic brain syndrome. Folia Psychiatrica et Neurologica Japonica 27(2): 155-166

Roder, K.; Daebeler, F.; Legde, G., 1975: The surveillance of insect pests in the large-scale production of rape. Seven species of insects (Ceutorhynchus assimilis (Payk.), C. napi Gylh., C. pleurostigma (Marsham), C. quadridens (Panz.), Dasineura brassicae (Winn.), Meligethes aeneus (F.) and Psylliodes chrysocephalus (L.) were kept under surveillance in fiel...

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Harris, Chris, 2008: Governing spaces: urban transit, land development and the local state. Civil Engineering and Environmental Systems 25(4): 281-289

Levengood, J.D.; Tolbert, M.; Li, M-Ling.; Tolbert, B.S., 2014: High-affinity interaction of hnRNP A1 with conserved RNA structural elements is required for translation and replication of enterovirus 71. Human Enterovirus 71 (EV71) is an emerging pathogen of infectious disease and a serious threat to public health. Currently, there are no antivirals or vaccines to slow down or prevent EV71 infections, thus underscoring the urgency to better unders...

Zhou, C.; Gilbert, J.D.; Byard, R.W., 2012: How useful is basal renal tubular epithelial cell vacuolization as a marker for significant hyperglycemia at autopsy?. Basal vacuolization of renal tubular epithelial cells (so-called Armanni-Ebstein phenomenon) has been attributed to hyperglycemia causing accumulation of cytoplasmic glycogen. Review of 34 autopsy cases with significant hyperglycemia (vitreous glu...