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Geographical differences in habitat relationships of cetaceans across an ocean basin ArchiMer
Mannocci, Laura; Roberts, Jason J.; Pedersen, Eric J.; Halpin, Patrick N..
The distributions of highly mobile marine species such as cetaceans are increasingly modeled at basin scale by combining data from multiple regions. However, these basin‐wide models often overlook geographical variations in species habitat relationships between regions. We tested for geographical variations in habitat relationships for a suite of cetacean taxa between the two sides of the North Atlantic basin. Using cetacean visual survey data and remote sensing data from the western and eastern basin in summer, we related the probability of presence of twelve cetacean taxa from three guilds to seafloor depth, sea surface temperature and primary productivity. In a generalized additive model framework, we fitted 1) basin‐wide (BW) models, assuming a single...
Tipo: Text Palavras-chave: Environmental predictors; Geographical variation; Habitat relationships; Highly mobile marine species; North Atlantic Ocean; Species distribution modeling.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00630/74163/73721.pdf
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The subspecies of Chlidonias hybridus (Pallas), their breeding distribution and migrations Naturalis
Mees, G.F..
CONTENTS 1. Introduction ... 3 2. Bartels collection from Java (GCAJ) ... 4 3. Specimens from Ceylon (GCAJ) ... 6 4. Additional material from the Greater Sunda Islands and from the Philippines ... 7 5. Status in the Indo-Australian region ... 8 6. Status in East Asia ... 15 7. Status in Africa ... 17 8. Western Palaearctic breeding distribution ... 23 9. Geographical variation ... 34 10. Measurements ... 38 11. Breeding season and nuptial plumage ... 41 12. The identity of Sterna javanica Hors field ... 45 13. Nomenclature ... 46 14. The systematic position of Hydrochelidon albostiata Gray ... 49 15. Acknowledgements ... 53 16. References ... 54 I. INTRODUCTION During the years preceding his sudden death in Januari 1962, my...
Tipo: Article / Letter to the editor Palavras-chave: Chlidonias hybridus (Pallas); Laridae; Sterninae; Bartels collection; Geographical variation; Measurements; Nomenclature; 42.83.
Ano: 1977 URL: http://www.repository.naturalis.nl/record/323932
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MORPHOLOGICAL VARIATION AND TAXONOMY OF LEPIDOCOLAPTES ANGUSTIROSTRIS (VIEILLOT, 1818) (PASSERIFORMES: DENDROCOLAPTIDAE) Pap. Avulsos de Zool. (São Paulo)
BOLÍVAR-LEGUIZAMÓN,SERGIO; SILVEIRA,LUÍS FÁBIO.
Lepidocolaptes angustirostris is a South American woodcreeper that inhabits predominantly open lowlands such as the Cerrado, Chaco and Caatinga. Eight subspecies are currently recognized based on plumage patterns and geographical distribution. However, a more detailed morphological analysis and taxonomic revision have not been done in this species. The objective of this study was to conduct a taxonomic revision of L. angustirostris using morphometrical and plumage character, and a Generalized Linear Models analyzes (GLM) were elaborated to identify environmental variables that could account for this variation. We found a high level of intergradation among all named populations. The principal component analyzes show certain levels of morphological...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Taxonomy; Lepidocolaptes angustirostris; Geographical variation; South America; Ecogeographic rules..
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492015002100281
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Constant fluctuating asymmetry but not directional asymmetry along the geographic distribution of Drosophila antonietae (Diptera, Drosophilidae) Rev. Bras. entomol.
Costa,Marcelo; Mateus,Rogério P.; Moura,Mauricio O..
ABSTRACT The population dynamics of a species tends to change from the core to the periphery of its distribution. Therefore, one could expect peripheral populations to be subject to a higher level of stress than more central populations (the center–periphery hypothesis) and consequently should present a higher level of fluctuating asymmetry. To test these predictions we study asymmetry in wing shape of five populations of Drosophila antonietae collected throughout the distribution of the species using fluctuating asymmetry as a proxy for developmental instability. More specifically, we addressed the following questions: (1) what types of asymmetry occur in populations of D. antonietae? (2) Does the level of fluctuating asymmetry vary among populations? (3)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Developmental instability; Generalized Procrustes Analysis; Geographical variation; Geometric morphometrics; Shape.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262015000400337
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