Zobrazeno 1 - 10 of 13 pro vyhledávání: '"Nico Varo"'
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Akademický článek
Physiological strategies of moult-migrating Black-necked Grebes (Podiceps nigricollis) in a polluted staging site according to blood chemistry
Autor: Juan A. Amat, Nico Varo, Marta I. Sánchez, Andy J. Green, Dámaso Hornero-Méndez, Juan Garrido-Fernández, Cristina Ramo
Publikováno v: Avian Research, Vol 14, Iss , Pp 100118- (2023)
After breeding, Black-necked Grebes (Podiceps nigricollis) perform a moult-migration to autumn hypersaline staging sites, where they moult the flight feathers and forage on superabundant brine shrimp (Artemia spp.) before leaving for wintering areas.
Externí odkaz: https://doaj.org/article/e237ad2c371747f2a275d5dcfe8d8427
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2
Exposure of black-necked grebes (Podiceps nigricollis) to metal pollution during the moulting period in the Odiel Marshes, Southwest Spain
Autor: Jaime Rodríguez-Estival, Nico Varo, Juan A. Amat, Marta I. Sánchez, Mark A. Taggart, Dámaso Hornero-Méndez, Cristina Ramo, Rafael Mateo, Andy J. Green, Manuel E. Ortiz-Santaliestra, Mónica Martínez-Haro, Juan Garrido-Fernández
Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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European populations of black-necked grebes (Podiceps nigricollis) congregate every year to moult at the salt ponds of the Odiel Marshes (SW Spain). However, the Odiel Marshes are part of one of the most metal-polluted coastal estuaries in the world,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13875beedbfd3157f5292c2ef3ab8ac1
http://hdl.handle.net/10261/179193
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3
Sexual dimorphism and sex determination in Black-necked Grebes Podiceps nigricollis: on the need to account for geographical variation in morphology and sex ratio
Autor: Cristina Ramo, Alberto Álvarez, Pedro Sáez-Gómez, Nico Varo, Carlos Camacho, Andy J. Green
Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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[Capsule] The sex of Black-necked Grebes Podiceps nigricollis in Spain can be determined successfully using a locally derived discriminant function analysis (DFA) but a function derived from a North American population was not successful.
[Aims]
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e800f4399bc381f8febee63d9bb5c04
http://hdl.handle.net/10261/198073
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4
Breeding biology of two sympatric coots with contrasting conservation status
Autor: Nico Varo
Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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Capsule: Red-knobbed Coots Fulica cristata and Common Coots Fulica atra have similar breeding biology except in chick survival, which was significantly lower in Red-knobbed Coots. Aims: To provide information on the breeding biology of Red-knobbed Co
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7af96fd77723eaeb14de7638ea201344
https://doi.org/10.1080/00063650809461537
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5
Grit Ingestion and Size-related Consumption of Tubers by Graylag Geese
Autor: Nico Varo, Juan A. Amat
Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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In herbivorous birds the processing rate of food is constrained by gizzard capacity. To enhance digestive processes, many species ingest grit to grind the food. Grit ingestion, however, may further limit the capacity of file gizzard. Graylag Geese (A
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c9c5fbdeb2fe97989debabba2aa7410
https://doi.org/10.1675/1524-4695(2008)31[133:giasco]2.0.co
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6
Differences in food assimilation between two coot species assessed with stable isotopes and particle size in faeces: Linking physiology and conservation
Autor: Nico Varo, Juan A. Amat
Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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The red-knobbed coot Fulica cristata experienced a dramatic population decline in Spain, where the common coot F. atra does not face conservation problems. This is puzzling because both species have similar ecologies. It has been suggested that habit
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5c387f389450872e7aed373c05a81fd6
https://doi.org/10.1016/j.cbpa.2007.12.002
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9
Female-biased sex ratio in moulting black-necked grebes podiceps nigricollis in Southern Spain
Autor: Andy J. Green, Juan A. Amat, Nico Varo, Marta I. Sánchez, Cristina Ramo
Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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We tested if Black-necked Grebe, a species in which both sexes undertake moult-migration, have an unbiased sex ratio at a moulting site in Europe, as previously found in North America and as was expected for a species with biparental care. For this w
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::feca539196d8a073841081cda57512c7
http://hdl.handle.net/10261/109255
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10
Cestodes change the isotopic signature of brine shrimp, Artemia, hosts: Implications for aquatic food webs
Autor: Cristina Ramo, Cristina Matesanz, Juan A. Amat, Andy J. Green, Marta I. Sánchez, Nico Varo
Publikováno v: Digital.CSIC. Repositorio Institucional del CSIC
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To reach the final host (greater flamingos), the cestode Flamingolepis liguloides alters the behaviour of its intermediate host, the brine shrimp, Artemia parthenogenetica, causing it to spend more time close to the water surface. During summer 2010,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1fd7630daeefa515602a52f6c87783c5
http://hdl.handle.net/10261/67250
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