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| Registros recuperados: 19 | |
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| Martins,Cinthia Caroline Cardoso; Duarte,Olivia Maria Pereira; Waldschmidt,Ana Maria; Alves,Rogério Marco de Oliveira; Costa,Marco Antônio. |
| Cytogenetic analyses of the stingless bee Partamona helleri collected in the state of Bahia, Northeast Brazil revealed the chromosome numbers n = 18 in the haploid males and 2n = 35 in the diploid females. All karyotypes displayed one large acrocentric B chromosome, which differs from the minute B chromosomes previously described in the populations from southeastern Brazil. Giemsa staining, C-banding and DAPI/CMA3 fluorochrome staining also revealed a remarkable interpopulational divergence regarding both the regular karyotype and the B chromosomes. The B chromosomes found in the samples from Jequié, Bahia, were entirely heterochromatic, while those found in Cravolândia, Bahia, displayed a euchromatic portion at the telomeric end of the long arm. CMA3... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stingless Bee; Partamona helleri; Geographic variation; Supernumerary chromosomes. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572009000400019 |
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| Parmentier, E; Lagardere, Jean-paul; Vandewalle, P; Fine, M. |
| Because of pelagic-larval dispersal, coral-reef fishes are distributed widely with minimal genetic differentiation between populations. Amphiprion akallopisos, a clownfish that uses sound production to defend its anemone territory, has a wide but disjunct distribution in the Indian Ocean. We compared sounds produced by these fishes from populations in Madagascar and Indonesia, a distance of 6500 km. Differentiation of agonistic calls into distinct types indicates a complexity not previously recorded in fishes' acoustic communication. Moreover, various acoustic parameters, including peak frequency, pulse duration, number of peaks per pulse, differed between the two populations. The geographic comparison is the first to demonstrate 'dialects' in a marine... |
| Tipo: Text |
Palavras-chave: Speciation; Dialect; Geographic variation; Pomacentridae; Sound production. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-3630.pdf |
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| Al-Shayyab,Mohammad H; Alsoleihat,Firas; Dar-Odeh,Najla S; Ryalat,Soukaina; Baqain,Zaid H. |
| Accurate information regarding the vertical location and appearance of the mental foramen, and the presence of accessory foramina, can have clinical significance, such as reducing complications that may occur during many oral surgical procedures involving the mental area. Geographic variations were reported in these variables. The aim was to evaluate the above-mentioned variables in an Iraqi sample. Five hundred eighteen panoramic radiographs of a random Iraqi sample (257 males, 261 females, average age= 46.5 years) were evaluated with regard to the above-mentioned variables, as well as the symmetry of the foramen regarding these variables. The area below the apices of mandibular premolars, and the continuous type were the most frequent vertical location... |
| Tipo: Journal article |
Palavras-chave: Mental foramen; Panoramic radiographs; Geographic variation; Iraqi population. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100045 |
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| Al-Shayyab,Mohammad H; Alsoleihat,Firas; Dar-Odeh,Najla S; Ryalat,Soukaina; Baqain,Zaid H. |
| Accurate information regarding the horizontal location and shape of the mental foramen can have clinical significance, such as reducing complications that may occur during maxillofacial surgical procedures involving the mental area. Geographic variations were reported in these variables. The aim was to study the horizontal position and shape of the mental foramen, as seen on panoramic radiographs of an Iraqi sample, to assess difference in these variables between sexes and age groups, and to assess symmetry of the mental foramen. 518 panoramic radiographs of a random Iraqi sample (257 males, 261 females, average age=46.5 years) were evaluated with regard to the horizontal location, shape and symmetry of the mental foramina. The area between the long axes... |
| Tipo: Journal article |
Palavras-chave: Mental foramen; Panoramic radiographs; Geographic variation; Iraqi population. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022015000100024 |
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| Oortwijn, R.G.M.. |
| In this paper a survey is given of the geographic variation and the subspecies of Corvus enca (Horsfield). For that purpose the collections of the Rijksmuseum van Natuurlijke Historie in Leiden and the Zoölogisch Museum in Amsterdam were studied and compared with the literature. My examinations resulted in the following division of subspecies: - Corvus enca compilator Richmond: Malaya, Sumatra, Simalur, Nias, Borneo, (Rhio Archipelago). - Corvus enca enca (Horsfield): Java, Bali, Celebes, Sula Islands, (Mentawei Islands). - Corvus enca violaceus Bonaparte: Ceram (and perhaps Buru). - The birds from Mindoro, Samar, Mindanao, Palawan, Balabac and Luzon possibly belong to two or three subspecies. Geographic variation also appears to exist among the... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Corvus enca; Geographic variation; Subspecies; 42.83. |
| Ano: 1987 |
URL: http://www.repository.naturalis.nl/record/318704 |
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| Arntzen, J.W.; Wallis, Graham P.. |
| Within the newt genus Triturus, the large-bodied species in the T. cristatus (crested newt) superspecies show an unusual degree of variation in relative trunk length as a result of among-taxon variation in interlimb vertebral count. Here we examine the systematic value of this feature as assessed by both exterior measurement (Wolterstorff Index) and direct radiographic count of rib-bearing vertebrae, with particular reference to a number of confounding factors (sex differences, hybridisation, geographic variation, allometry, preservation effects). Using our mtDNA haplotype data, which are largely concordant with geographic distribution of species, we find that direct count of the rib-bearing vertebrae performs more reliably (14% misclassification) than... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Asymmetric hybridisation; Biogeography; Crested newt; Geographic variation; Morphology; MtDNA; Taxonomy; Triturus cristatus. |
| Ano: 1999 |
URL: http://www.repository.naturalis.nl/record/534387 |
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| Sangster, G.; Rozendaal, F.G.. |
| The Large-tailed Nightjar Caprimulgus macrurus Horsfield, 1821, complex, as currently recognized, comprises 12 taxa which are grouped into four species based on their territorial songs. However, species limits are based on very small samples of a limited number of taxa in the complex. To further document species limits in the complex, we analysed 109 sound recordings representing all recognized taxa. Principal components analysis suggests the existence of six vocally distinct groups within the complex. Discriminant function analysis assigned 98-100% of individuals correctly to their group. Each of these groups differs diagnosably from all other groups by up to eight vocal characters, and each group is recognizable by ear. We propose to treat these six... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Caprimulgus macrurus; Species limits; Taxonomy; Geographic variation; Vocalizations; 42.83. |
| Ano: 2004 |
URL: http://www.repository.naturalis.nl/record/215553 |
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| Carvalho,Tiago Pinto; Reis,Roberto E. |
| The species of Hisonotus from the laguna dos Patos system are reviewed. Two species with wide distributions are redescribed: Hisonotus laevior and H. nigricauda. Six new species are described from that system: H. notopagos from the rio Camaquã drainage; H. carreiro and H. prata, endemic from the headwaters of rio Taquari drainage; H. vireo, widely distributed in the rio Jacuí basin; and H. brunneus and H. heterogaster restricted to tributaries of the rio Jacuí drainage. Hisonotus leptochilus is here considered a junior synonym of H. laevior. Hisonotus armatus, H. charrua, H. leucofrenatus, and H. taimensis are also present in the region and in total there are twelve species of Hisonotus in the laguna dos Patos system. Their distributions are discussed,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cascudinhos; Endemism; Geographic variation; Neotropical. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000100001 |
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| Todd, Jessica E.; Leibtag, Ephraim S.; Penberthy, Corttney. |
| Although healthy foods can be affordable, if less healthy foods are cheaper, individuals may have an economic incentive to consume a less healthful diet. Using the Quarterly Food-at-Home Price Database, we explore whether a select set of healthy foods (whole grains, dark green vegetables, orange vegetables, whole fruit, skim and 1% milk, fruit juice, and bottled water) are more expensive than less healthy alternatives. We find that not all healthy foods are more expensive than less healthy alternatives; skim and 1% milk are less expensive than whole and 2% milk and bottled water is generally less expensive than carbonated nonalcoholic drinks. We also find considerable geographic variation in the relative price of healthy foods. This price variation may... |
| Tipo: Report |
Palavras-chave: Quarterly Food-at-Home Price Database (QFAHPD); Healthy food; Price; Geographic variation; Agricultural and Food Policy; Consumer/Household Economics; Demand and Price Analysis; Food Consumption/Nutrition/Food Safety; Health Economics and Policy; Public Economics. |
| Ano: 2011 |
URL: http://purl.umn.edu/117976 |
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| VIDAL,MARCELA A; ORTIZ,JUAN CARLOS; LABRA,ANTONIETA. |
| The interspecific variation of heating rates in Liolaemus lizards, suggests an adaptive value of this physiological thermoregulatory mechanism, which would allow lizards to cope with the environmental thermal restrictions, imposed to behavioral thermoregulation. This trend has barely been tested at intraspecific level, and here we explore if intraspecific variation in heating rates occurs in Liolaemus tenuis, a relative widely distributed species from central Chile. We test the hypothesis that heating rates are related to the thermal environmental conditions at which populations are exposed, by comparing the heating rates of three populations (from a latitudinal range), which inhabit under different thermal conditions. Additionally, we explore if the... |
| Tipo: Journal article |
Palavras-chave: Geographic variation; Sexual variation; Thermoregulation. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000200002 |
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| Registros recuperados: 19 | |
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