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Cryptic variation and recent bipolar range expansion within the Stumped-Toed Gecko Gehyra mutilata across Indian and Pacific Ocean islands Naturalis
Rocha, S.; Ineich, I.; Harris, D. James.
With an impressively wide distribution, Gehyra mutilata is present on almost all Indian and Pacific Ocean islands and in large regions of Southeast Asia and Indonesia. Mitochondrial sequence data (~500 bp) from individuals covering large parts of its (mainly insular) distribution reveals deep cryptic variation and strong geographic structure, with two well differentiated lineages. Molecular data also reveals that the wide Indian and Pacific insular distribution of Gehyra is very recent and, at least across the Indian Ocean islands, most probably the result of human-aided dispersal, as no variation within this lineage was found. Further research is needed to determine geographic patterns of variation across Southeast Asia, the level of genetic variation,...
Tipo: Article / Letter to the editor Palavras-chave: 16s rRNA; Asia; Biogeography; Gehyra insulensis; Gehyra mutilata; Indian Ocean; Introductions; Island colonisations; Oceania; 42.82.
Ano: 2009 URL: http://www.repository.naturalis.nl/record/301369
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Economic Determinants of Invasion and Discovery of Nonindigenous Insects AgEcon
Hlasny, Vladimir; Livingston, Michael J..
Introductions of nonindigenous organisms into the United States have been linked to international trade. The individual contributions of imports, immigration, and international travel, however, are poorly understood because introduction dates are unavailable. We examine relationships between economic trends and discoveries of nonindegenous insects and use these relationships to infer the timing and determinants of introductions. We find that a few variables can explain much variation in species introductions and identifications. The most significant contributor to the introduction appears to be agricultural imports. Currently available proxies for academic effort are weak determinants of the probability that introduced species are identified.
Tipo: Journal Article Palavras-chave: Identifications; Insects; Introductions; Invasive species; Nonindegenous; Agribusiness; Crop Production/Industries; F18; N7; Q56.
Ano: 2008 URL: http://purl.umn.edu/45044
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Molluscan pathogens of concern to ASEAN ArchiMer
Bondad-reantaso, Melba; Berthe, Franck.
Pacific oysters were introduced into west coast of the USA from Matsushima Bay in Japan, infected with low levels of Haplosporidiumsp. identical to H.nelsoni(MSX) which causes high mortalities of Eastern oyster (C. virginica). A highly specific and sensitive DNA probe for H. nelsonican also detect Haplosporidium sp. in C.gigas of western US and Japan (Burreson and Stokes 2000).In 2002, H. nelsoni was detected in Japan using the same probe (Kamaishi and Yoshinaga 2002).Lesson: it appears that H. nelsoni does not cause serious disease in Pacific oysters; H. nelsoniis now speculated to have been introduced into the Pacific US by apparently healthy but infected C. gigas. Infected C. gigaswere introduced onto the east coast of the US where the parasite shifted...
Tipo: Text Palavras-chave: Pathogens; Diseases; Impact; Introductions; Transfers; Molluscan Pathogens.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/acte-3294.pdf
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