2004
DOI: 10.1093/jhered/esh055
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Low Genetic Variability in the Highly Endangered Mediterranean Monk Seal

Abstract: Genetic variability is an important component in the ability of populations to adapt in the face of environmental change. Here we report the first description of nuclear genetic variability in the only remaining sizable colony of the Mediterranean monk seal (Monachus monachus), located at Cap Blanc (Western Sahara, Mauritania), whose estimated size during the study period (1994-May 1997) was about 320 individuals. We tested 42 microsatellite loci isolated from five pinniped species in a sample of 52 pups. Thre… Show more

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Cited by 64 publications
(61 citation statements)
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“…An effective population size of N e = 2 for ten generations (Figure 3) is required to achieve the present level of heterozygosity (assuming an initial heterozygosity of H O = 0.75 [41]). While this is not impossible, it seems unlikely given that 1,500 seal skins were reportedly landed by the Gambia in 1859 [31] and that by 1958, 900 non-pup individuals were observed during NWHI beach counts [42].…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…An effective population size of N e = 2 for ten generations (Figure 3) is required to achieve the present level of heterozygosity (assuming an initial heterozygosity of H O = 0.75 [41]). While this is not impossible, it seems unlikely given that 1,500 seal skins were reportedly landed by the Gambia in 1859 [31] and that by 1958, 900 non-pup individuals were observed during NWHI beach counts [42].…”
Section: Resultsmentioning
confidence: 99%
“…We assumed an average initial heterozygosity (H 0 = 0.75) following similar analyses of the Mediterranean monk seal [41]. We plotted the loss of heterozygosity over a range of time (0-200 generations).…”
Section: Methodsmentioning
confidence: 99%
“…This is contrary to the phocids of the Arctic-Boreal region, whose population size has decreased dramatically from human activity, i.e., hunting, bycatch, viral diseases, etc. (Hauksson, 2002;Barron et al, 2003;Pastor et al, 2004;Di Guardo et al, 2005;Andersen et al, 2006;Harding et al, 2007). Similarly, Antarctic fish species belonging to the Channictiydae, Bathydraconidae, and Nototheniidae, and that function as intermediate hosts for these nematodes, have not been subject to the population reduction from overfishing that has occurred in host fish species, i.e., Gadus morhua, in the Boreal region found infected by the Arctic members of the C. osculatum complex (Cook et al, 1997;Masood, 1997).…”
Section: Marine Nematodes and The Effects Of Habitat Disturbancementioning
confidence: 99%
“…Some authors [22][23][24][25][26][27] chose to investigate the behavior, growth and development of different species of sea lions. Genetic variability was also investigated in some pinnipedia [26,[28][29][30]. However, very few authors investigated their nervous system, especially the peripheral nervous system.…”
Section: Introductionmentioning
confidence: 99%