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101.
102.
The nurse shark, Ginglymostoma cirratum, inhabits shallow, tropical, and subtropical waters in the Atlantic and the eastern Pacific. Unlike many other species of
sharks, nurse sharks are remarkably sedentary. We assayed the mitochondrial control region and eight microsatellite loci from
individuals collected primarily in the western Atlantic to estimate the degree of population subdivision. Two individuals
from the eastern Atlantic and one from the Pacific coast of Panama also were genotyped. Overall, the mtDNA haplotype (h = 48 ± 5%) and nucleotide (π = 0.08 ± 0.06%) diversities were low. The microsatellite data mirror the mitochondrial results
with the average number of alleles ([`(N)]A \bar{N}_{A} = 9) and observed heterozygosity ([`(H)]O \bar{H}_{O} = 0.58) both low. The low levels of diversity seen in both the mtDNA and the microsatellite may be due to historical sea
level fluctuations and concomitant loss of shallow water habitat. Eight of the 10 pair-wise western Atlantic F
ST estimates for mtDNA indicated significant genetic subdivision. Pair-wise F
ST values for the microsatellite loci indicated a similar pattern as the mtDNA. The western Atlantic population of nurse sharks
is genetically subdivided with the strongest separation seen between the offshore islands and mainland Brazil, likely due
to deep water acting as a barrier to dispersal. The eastern and western Atlantic populations were closely related. The eastern
Pacific individual is quite different from Atlantic individuals and may be a cryptic, sister species. 相似文献
103.
Karenina Karina Giljov Andrey de Silva Shermin Malashichev Yegor 《Behavioral ecology and sociobiology》2018,72(2):1-12
Behavioral Ecology and Sociobiology - Due to the reduced conspicuousness of female signals, their evolution has traditionally been interpreted as a by-product of sexual or natural selection in... 相似文献
104.
Roumak Vladimir S. Popov Vladimir S. Shelepchikov Andrey A. Osipova Olga V. Umnova Nataliya V. 《Environmental science and pollution research international》2022,29(35):52796-52805
Environmental Science and Pollution Research - Differences in PCDD/Fs concentrations were registered among adult bank voles (Myodes glareolus) inhabiting forest in the vicinity of the Landfill... 相似文献