A role for molecular genetics in biological conservation.

O’Brien, Stephen J.

doi:10.1073/pnas.91.13.5748

Cited by 208 publications

(158 citation statements)

References 53 publications

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“…Fragmented populations of the common toad (Bufo bufo) for example are characterised by significantly lower genetic diversity, survival and developmental homeostasis, compared to larger toad populations (Hitchings and Beebee, 1998). Similarly, remnant populations of the Florida panther (Puma concolor coryi) have, compared with larger populations of the species in western United States, low levels of genetic variation, poor sperm quality and high susceptibility to parasites (Roelke et al, 1993;O'Brien, 1994).…”

Section: Discussionmentioning

confidence: 99%

Genetic diversity and condition factor: a significant relationship in Flemish but not in German populations of the European bullhead (Cottus gobio L.)

et al. 2002

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Although evidence of associations between genetic diversity and fitness in wild species has been published, the lack of a comprehensive review across species and the existence of contradictory results have led to scepticism remaining about its existence and importance in natural populations. In this study, the relationship between genetic diversity at six microsatellite loci and condition factor (a fitness related trait) was investigated at the population level in both Flemish and German populations of the European bullhead (Cottus gobio). A significant positive correlation was observed

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Section: Discussionmentioning

confidence: 99%

Genetic diversity and condition factor: a significant relationship in Flemish but not in German populations of the European bullhead (Cottus gobio L.)

et al. 2002

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“…Further studies in 1990s questioned whether wild cheetah's survival was being compromised by their lack of genetic variation, and Caro and Laurenson (1994) pointed out that disease susceptibility and breeding problems were an issue more for captive cheetahs while predation was more important in the wild population. The claims that cheetah lost 90-99% of its variability in one or more bottlenecks (O'Brien, 1994) are questionable as it would require 16 generations of sib-sib mating (N e =2) to lose 99% of genetic variation (Amos and Balmford, 2001). A recent study in Namibia (Castro-Prieto et al, 2011) revealed more variation in Class I MHC, but not Class II MHC and also the amount of DNA sequence variation among the alleles was fairly high thus they could recognize a wide array of foreign proteins.…”

Section: Loss Of Genetic Variabilitymentioning

confidence: 99%

“…This implies that variability loss mainly depends on the size of the lowest population to date and for how many generations it has been held at that level; it is slow compared to the timescales over which conservation biology operates (Amos and Balmford, 2001). Thus, although some studies claimed to show a link between known bottlenecks to low levels of genetic variability like in cheetah (O'Brien, 1994) and in Elephant seals (Hoelzel et al, 1993), closer examination reveals that the expected loss of heterozygosity might be far less than thought (Amos and Balmford, 2001). The level of threat posed by genetic variability considering this aspect is therefore currently not very serious but there is no guarantee that situation will remain the same given the ongoing challenges in threats like habitat degradation, fragmentation, pollution and climate change.…”

Section: Loss Of Genetic Variabilitymentioning

confidence: 99%

Are Genetic Threats a Serious Concern in the Conservation of Natural Populations?

Tarakini¹,

Liang²

2012

ijmec

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The earth is currently faced with a mounting loss of species that is threatening biodiversity and genetic threats are among the causes of this challenge. However, the contribution of genetic threats to the extinction crisis is of current debate. In this paper, we present our arguments in light of loss of genetic variability, inbreeding depression, Accumulation of mildly deleterious mutations, local extinction in the presents of migration and extinction in metapopulations context. The extinction processes often operates across many facets hence the division between demographic, environmental and genetic just artificial. In addition, genetic threats only become important after populations have been driven to very low levels, particularly by human activities such as poaching, habitat fragmentation, introduction of invasive organisms and pollution. We advocate for conservation efforts to be distributed proportionally to threats posed by any factor, and as shown by most studies, most genetic threats are currently not priorities for many species.

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“…An emerging role of population genetics, phylogenetics, and phylogeography as indicators of a population's natural history and its future prognosis, provides valuable data for use in the development of conservation management plans for endangered species (O'Brien, 1994).…”

Section: Conservation and The Real Risk Of Extinction Of Tuco-tucosmentioning

confidence: 99%

The conservation status of the tuco-tucos, genus Ctenomys (Rodentia: Ctenomyidae), in southern Brazil

et al. 2007

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The goal of conservation biology should be related to the preservation of species and also to the evolutionary and ecological processes that were responsible to form them and that are still acting. We review the conservation status of the species of tuco-tuco (Ctenomys torquatus, C. lami, C. minutus, and C. flamarioni) from southern Brazil, and relate these data to the geological history of a particular area in that region, the Coastal Plain of the States of Rio Grande do Sul and Santa Catarina. The implications of the data on these species from the Southeastern Brazil are also discussed in relation to the evolution and risk of extinction of these subterranean rodents.Keywords: Ctenomys, subterranean rodents, hybrid zones, threatened species, Coastal Plain of Rio Grande do Sul. O status da conservação dos tuco-tucos, gênero Ctenomys(Rodentia: Ctenomyidae), no sul do Brasil ResumoO objetivo da biologia da conservação deve estar relacionado com a preservação das espécies e também com os processos evolutivos e ecológicos que foram responsáveis por sua formação e que continuam ocorrendo. Este trabalho revisa o status de conservação das espécies de tuco-tuco (Ctenomys torquatus, C. lami, C. minutus e C. flamarioni) do sul do Brasil, assim como a relação entre estas informações e a história geológica de uma região de especial importância, a planície costeira dos Estados do Rio Grande do Sul e Santa Catarina. São também discutidas as implicações do conhecimento acumulado sobre as espécies de tuco-tuco no sul do Brasil em relação aos aspectos evolutivos e a ameaça de extinção que estas espécies de roedores subterrâneos sofrem.Palavras-chave: Ctenomys, roedores subterrâneos, zonas híbridas, espécies ameaçadas, planície costeira do Rio Grande do Sul.

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A role for molecular genetics in biological conservation.

Abstract: The recognition ofrecent

Cited by 208 publications

References 53 publications

Genetic diversity and condition factor: a significant relationship in Flemish but not in German populations of the European bullhead (Cottus gobio L.)

Genetic diversity and condition factor: a significant relationship in Flemish but not in German populations of the European bullhead (Cottus gobio L.)

Are Genetic Threats a Serious Concern in the Conservation of Natural Populations?

The conservation status of the tuco-tucos, genus Ctenomys (Rodentia: Ctenomyidae), in southern Brazil

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