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61.
Rates and dates of divergence between AIDS virus nucleotide sequences 总被引:28,自引:3,他引:25
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AS Glen D Anderson CJ Veltman PM Garvey M Nichols 《New Zealand journal of zoology.》2016,43(2):127-137
A major challenge in controlling overabundant wildlife is monitoring their populations, particularly as they decline to very low density. Camera traps and wildlife detector dogs are increasingly being used for this purpose. We compared the cost-effectiveness of these two approaches for detecting feral cats (Felis catus) on two pastoral properties in Hawke's Bay, North Island, New Zealand. One property was subject to intensive pest removal, while the other had no recent history of pest control. Camera traps and wildlife detector dogs detected cats at similar rates at both sites. The operating costs of each method were also comparable. We identify a number of advantages and disadvantages of each technique, and suggest priorities for further research. 相似文献
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Molecular evolution of mammalian aquaporin-2: further evidence that elephant shrew and aardvark join the paenungulate clade 总被引:1,自引:1,他引:0
Madsen O; Deen PM; Pesole G; Saccone C; de Jong WW 《Molecular biology and evolution》1997,14(4):363-371
A 328-bp sequence from exon 1 of the gene for aquaporin-2 (AQP2) was
compared in 12 mammalian species, representing as many eutherian orders.
This sequence encodes the N-terminal half of this kidney- specific water
channel protein. Most amino acid replacements, as well as an insertion,
have occurred in extracellular loops connecting the transmembrane helices,
in agreement with a lower functional importance of these loops.
Phylogenetic analyses were performed with parsimony, distance, and
maximum-likelihood methods. The AQP2 data set, alone as well as in
combination with previously published alpha A-crystallin protein sequences,
strongly supports a clade consisting of elephant, hyrax, aardvark, and
elephant shrew, reaching bootstrap values of 99%. This finding fully agrees
with the only other presently available sequence data sets that include
these taxa, those of von Willebrand factor and interphotoreceptor
retinoid-binding protein, and suggests that this extended paenungulate
clade is one of the most conspicuous superordinal groupings in eutherian
phylogeny. Some support was obtained for an artiodactyl/perissodactyl
clade, while the grouping of pholidotes with edentates was contradicted.
相似文献
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Alien fishes are considered a major threat to aquatic biodiversity in South Africa, yet relatively little regional information on their biology and ecology is available for many of these species. Seasonal changes in the diet of the bluegill Lepomis macrochirus in Howieson’s Poort Dam, Grahamstown, were assessed during summer and winter in 2014–2015, using stomach content analysis. In winter, juvenile and adult fish diets were dominated by crustacean zooplankton and insects, respectively. In summer, juvenile fish fed on crustaceans and insects, whereas adults consumed mostly fish eggs, indicating a potential impact by these invasive fish on native fish through oophagy. 相似文献