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| Registros recuperados: 14 | |
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| Nijman, V.; Vonk, R.. |
| Global biogeography and phylogeography have gained importance as research topics in zoology, as attested by the steady increase in the number of journals devoted to this topic and the number of papers published. Yet, in a globalising world, with species reintroductions, invasions of alien species, and large-scale extinctions, unravelling the true biogeographic relationships between areas and species may become increasingly difficult. We present an introduction to the symposium ‘Biogeography: explaining and predicting species distributions in space and time’ held in Amsterdam in 2007, and the resulting papers as published in this special issue, including papers on crustaceans, birds and mammals. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Extinction; Globalization; Invasions; Reintroductions; Zoogeography; 42.65. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/280455 |
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| Vonk, R.; Nijman, V.. |
| We provide a brief overview of the history of the journal Contributions to Zoology and analyse the papers published in the last 27 years by topic. Founded in 1848 as ‘Bijdragen tot de Dierkunde’, 160 years and 76 volumes later it is one of the oldest zoological journals that is still regularly printed. Over the last decades most papers dealt with invertebrates (60%), followed by vertebrates (23%), insects (10%) and non-taxonomic papers. Contributions to Zoology has seen a change from a largely alpha taxonomic journal to one that is truly general in scope. Systematic Biology and Comparative Morphology of both extant and extinct taxa nowadays make up about half of the papers published. Ethology as a research subject has been gradually phased out, and judged... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Bibliographic analysis; Biological research trends; 42.01. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/262650 |
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| Aliabadian, M.; Nijman, V.; Mahmoudi, A.; Naderi, M.; Vonk, R.; Vences, M.. |
| In the context of DNA Barcoding, sequences of standard marker genes for thousands and potentially millions of individuals and species are becoming available, requiring ever more efficient bioinformatic environments and software algorithms for analysis. We here present ExcaliBAR (Extraction, Calculation, Barcoding), a user-friendly software utility to facilitate one important initial step in DNA barcoding analyses, namely the determination of the barcoding gap between pairwise genetic distances among and within species, based on original distance matrices computed by MEGA software. In addition, the software is able to rename sequences downloaded via the standard user interfaces of public databases such as GenBank, without the need of developing and applying... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Bioinformatics DNA Barcoding pairwise genetic distance sequence renaming 35.73 42; 20 54.50. |
| Ano: 2014 |
URL: http://www.repository.naturalis.nl/record/474212 |
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| Nijman, V.. |
| The Javan gibbon Hylobates moloch is confined to the last remnants of rainforest on the island of Java, Indonesia. As of 2002, the species has been recorded in 29 forest areas, and the wild population is conservatively estimated at 4100-4500 individuals. Over 95% of the gibbons are in populations of >100 individuals, and the four largest areas support populations of >500 individuals each. In 2003, 56 Javan gibbons were maintained at eight Indonesian zoos, 15 at four Indonesian wildlife rescue centres, with five potential breeding pairs. There is no evidence that the species has bred successfully in captivity in Indonesia. Outside the range country, 48 Javan gibbons were maintained at ten institutions in nine countries, with six breeding pairs. The... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Captive populations; Conservation; Indonesia; PHVA; Population management; 42.84. |
| Ano: 2006 |
URL: http://www.repository.naturalis.nl/record/214541 |
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| Aliabadian, M.; Roselaar, C.S.; Sluys, R.; Nijman, V.. |
| In the study of diversity patterns, the Mid-domain effect (MDE), which explains gradients in diversity solely on the basis of geometric constraints, has emerged as a null-model against which other hypotheses can be tested. The effectiveness, measured by its predictive power, of these MDE models appears to depend on the size of the study area and the range-sizes of the taxa considered. Here we test the predictive power of MDE on the species richness patterns of birds and assess its effectiveness for a variety of species range sizes. We digitised distribution maps of 889 species of songbird endemic to the Palearctic, and analysed the emergent biogeographic patterns with WORLDMAP software. MDE had a predictive power of 20% when all songbirds were included.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Aves; Passeriformes; Palearctic; Mid-domain effect; Species richness; Geographic range size; 42.83. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/256132 |
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| Nijman, V.; Bergin, D.. |
| Reptiles are traded globally for medicinal purposes. Historic qualitative accounts of reptiles used as medicine in Morocco are numerous, but contemporary quantitative data are rare. In 2013-2014, we surveyed 49 wildlife markets in 20 towns throughout Morocco, plus the Spanish exclaves of Ceuta and Melilla. We recorded 1,586 specimens of at least nine species for sale in 14 of the Moroccan markets with a combined value of about US $100,000. The most prominent markets were those in Marrakesh, Meknes, Casablanca, and Fez, with the former two cites trading equal quantities of dried and live specimens and the latter two trading mainly dried specimens. Common species were the Mediterranean chameleon (Chamaeleo chamaeleon) with 720 specimens (506 dried, 214... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Bern Convention; CITES; Ethnozoology; Traditional medicine; Wildlife trade. |
| Ano: 2017 |
URL: http://www.repository.naturalis.nl/record/627511 |
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| Vonk, R.; Nijman, V.. |
| Small populations of several species of the groundwater dwelling amphipod genus Ingolfiella are found in caves, wells, seabottoms, beaches and riverbed interstitial habitats. To gain insight in the socio-ecology of these elusive species, we used data from collected specimens to explore the relationships between sexratios, display of secondary sexual characters and other morphological features, and habitat use. We extracted data on the sex ratios and the presence-absence of secondary sexual characters of 13 species from the literature and through examination of museum material. We found a clearly skewed sex ratio with a preponderance of females, both in the individual species as in the genus as a whole. However, sex ratio and the display of secondary sexual... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Arthropod sex ratio; Socio-ecology; Groundwater amphipods; 42.74. |
| Ano: 2006 |
URL: http://www.repository.naturalis.nl/record/214565 |
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| Aliabadian, M.; Sluys, R.; Roselaar, C.S.; Nijman, V.. |
| Explanation of the spatial distribution patterns in species richness, and especially those of small-ranged species (endemics), bears relevance for studies on evolution and speciation, as well as for conservation management. We test a geometric constraint model, the mid-domain effect (MDE), as a possible explanation for spatial patterns of species richness in Palearctic songbirds (Passeriformes), with an emphasis on the patterns of small-ranged species. We calculated species richness based on digitised distribution maps of phylogenetic species of songbirds endemic to the Palearctic region. Data were plotted and analyzed over a one degree longitude equal area map of the Palearctic Region, with a grid cell area of 4062 km². The emergent biogeographic patterns... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Aves endemism hotspot analysis mid-domain effect Palearctic; Songbirds 42.83. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/280478 |
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| Nijman, V.; Shepherd, C.R.. |
| In 1973 the Convention in International Trade in Endangered Species of Wild Fauna and Flora (CITES) was called to life as to regulate the international wildlife trade, and to prevent species becoming (economically and biologically) extinct. The trade in freshwater turtles and tortoises in Asia is so huge that it threatens the survival of many species. In 2006 and 2007, during three surveys at Chatuchak market in Bangkok, Thailand, we recorded a significant trade in non-native CITES-listed freshwater turtles and tortoises to be used as pets. We documented a total of 688 individuals of 19 species from different regions of the world, many of which are globally threatened with extinction. Most commonly recorded were three species of tortoise from Madagascar... |
| Tipo: Article / Letter to the editor |
Palavras-chave: CITES; Conservation; Southeast Asia; Wildlife trade; 42.82; 42.95. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/256140 |
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| Barnett, R.; Yamaguchi, N.; Shapiro, B.; Nijman, V.. |
| In natural history collections throughout Europe, there are many old lion specimens of unknown origin. If these specimens can be shown to have originated from now-extinct populations their value would significantly increase, as would the value of the collections. Recently, a 200-year old mounted skeleton in the Zoological Museum Amsterdam has been identified as the extinct Cape lion Panthera leo melanochaita (Smith, 1842), based primarily on morphological information inferred from a painting of this specimen while it was still alive. To test this hypothesis, we used ancient DNA (aDNA) techniques to extract and sequence mitochondrial DNA (mtDNA) from this specimen, and compared the genetic results with previously published lion mtDNA sequences. Our results... |
| Tipo: Article / Letter to the editor |
Palavras-chave: India; Mitochondrial DNA; Panthera leo; Skull morphology; South Africa; 42.84. |
| Ano: 2007 |
URL: http://www.repository.naturalis.nl/record/226454 |
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| Nijman, V.; Meijaard, E.. |
| Given its complex zoogeography and large number of islands insular Southeast Asia makes an excellent subject for studying the interrelationships of species richness, island area and isolation. The islands are merely highpoints of an immense shallow continental shelf which during Pleistocene glacial periods was exposed periodically as dry land connecting the now isolated islands with one another. The area is home to a large number of primate taxa, including many endemic to the region (Nasalis, Presbytis, Pongo, Symphalangus, Simias, Tarsius). Worldwide, the number of described (extant) species of primates has doubled in the last two decades partially as a result of applying a different species concept (viz. Phylogenetic Species Concept PSC as opposed to the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Endemism; Extinction; Island biogeography; Phylogeny; Species concepts; Sunda Shelf; 42.84. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/280480 |
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| Registros recuperados: 14 | |
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