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131.
ERIC M. SCHAUBER PAUL D. SCHARINE CLAYTON K. NIELSEN LYANN RUBERT 《The Journal of wildlife management》2008,72(2):561-563
ABSTRACT Managers use latrine surveys to monitor swamp rabbit (Sylvilagus aquaticus) populations but may miss rabbits in sites lacking suitable latrine logs. We tested artificial latrine logs in logless thickets in southern Illinois, USA, generally detecting swamp rabbits in fewer visits than by live-trapping. Artificial logs can aid swamp rabbit monitoring, especially in logless habitats. 相似文献
132.
Evapotranspiration rates increased with leaf area and fell withits decline at the time of flowering of cotton plants (Gossypiumbarbadense L.) and this relation was maintained while the rateof pan evaporation was steadily decreasing. A similar relationshipwas established for the hyacinth bean (Dolichos lablab L.) butevapotranspiration dropped at the onset of flowering, at thetime when leaf area was still increasing and the evaporatingpotential of the atmosphere began to rise. Evapotranspirationper unit area of leaf surface per day declined progressivelywith age for both species. 相似文献
133.
Littorina neritoides occurs on piers and large stones on thebeaches in northern Jutland, but may not be able to toleratecold winters. L. obtusata and L. mariae are common on Fucus,but only L. mariae penetrates deeply into the fjords and sounds. (Received 10 December 1979; 相似文献
134.
LOUISE BACH JENSEN HILDE MUYLLE PAUL ARENS CLAUS H. ANDERSEN PREBEN BACH HOLM MARC GHESQUIERE BERNADETTE JULIER THOMAS LÜBBERSTEDT KLAUS K. NIELSEN JAN DE RIEK ISABEL ROLDN‐RUIZ NIELS ROULUND CHRIS TAYLOR BEN VOSMAN PHILIPPE BARRE 《Molecular ecology resources》2005,5(4):951-957
We report on the characterization and mapping of 76 simple sequence repeat (SSR) markers for Lolium perenne. These markers are publicly available or obtained either from genomic libraries enriched for SSR motifs or L. perenne expressed sequence tag (EST) clones. Four L. perenne mapping populations were used to map the SSR markers. A consensus linkage map of the four mapping populations containing 65 of the SSR markers is presented, together with primer information and a quality score indicating the usefulness of the SSR marker in different populations. The SSR markers identified all seven L. perenne linkage groups. 相似文献
135.
ELSEMARIE KRAGH NIELSEN CARSTEN RIIS OLESEN CINO PERTOLDI PETER GRAVLUND JAMES S. F. BARKER NADIA MUCCI ETTORE RANDI VOLKER LOESCHCKE 《Biological journal of the Linnean Society. Linnean Society of London》2008,95(4):688-701
The red deer (Cervus elaphus) population in Denmark became almost extinct in recent historical times due to over‐hunting. The species has subsequently recovered within remote areas, but non‐Danish individuals have been introduced at several localities. To assess genetic structure, past demographic history, and the possibility of a still existing original stock, we analysed 349 specimens from 11 geographically separate areas and from three enclosed areas, genotyping 11 microsatellite loci. Moreover, an 826‐bp fragment of the control region of the mitochondrial DNA was sequenced for 116 recent specimens and seven museum specimens. There was a significant difference in mean expected heterozygosity (HE) between the three enclosed areas and the 11 unenclosed areas. Significant departures from Hardy–Weinberg equilibrium were observed in the three enclosed areas and in nine of the unenclosed areas. The overall degree of genetic differentiation among all 14 areas was significant (FST = 0.09, P < 0.01), primarily because the mean pairwise FST for the three enclosed areas was significantly higher than that for the 11 unenclosed areas. A Bayesian clustering procedure detected three genetically distinct populations and indicated reduced gene flow between the enclosed and unenclosed areas. The individuals in the unenclosed areas show genotypic mixture, presumably as a result of gene flow among them. Markov Chain Monte Carlo simulations, based on the genealogical history of the microsatellite alleles, suggest a drastic decline in the effective population size of the enclosed areas some 188–474 years ago. Mitochondrial DNA analysis of the recent specimens showed seven haplotypes. Individuals from the enclosed Jægersborg Dyrehave contain haplotypes that occur all over Denmark and also are found in Western Europe. A close relationship between Scandinavian and Western European red deer is most likely. Only individuals from the unenclosed Lindenborg Estate and the enclosed Tofte Skov did not group with any other Danish individuals. As six of seven museum specimens had haplotypes also found in modern Danish samples, the current population of red deer in Denmark is genetically close to the original Danish red deer. © 2008 The Linnean Society of London, Biological Journal of the Linnean Society, 2008, 95 , 688–701. 相似文献
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