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| Registros recuperados: 23 | |
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| Leopold,Mardik F.; Philippart,Catharina J. M.; Yorio,Pablo. |
| This paper describes nocturnal, marine feeding behaviour in the Brown-hooded Gull (Larus maculipennis) in November 2009. The gulls assembled at night at the end of a long pier, running 800 m offshore into the Golfo Nuevo, at Puerto Madryn, Chubut Province, Argentina. Powerful lights predictably lighted the water around the end of the pier and attracted many small prey animals to the surface. Several hundreds of gulls, presumed to be local breeders, came every night to feed on this bounty, using various feeding techniques and taking several prey species and sizes. Potential prey items were caught to be identified by vertical plankton hauls. The gulls most likely took relatively large Isopoda (Idothea sp.), Polychaeta (Platynereis sp.) and fish larvae... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diet; Marine invertebrates; Night light niche; Patagonia; Seabirds. |
| Ano: 2010 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072010000200002 |
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| Galgani, Francois; Claro, F.; Depledge, M.; Fossi, C.. |
| In its decision (2010/477/EU) relating to the European Marine Strategy Framework Directive (MSFD, 2008/56/EC), the European Commission identified the following points as focuses for monitoring: (i) 10.1.1: Trends in the amount, source and composition of litter washed ashore and/or deposited on coastlines, (ii) 10.1.2: Trends in the amount and composition of litter in the water column and accumulation on the sea floor, (iii) 10.1.3: Trends in the amount, distribution and composition of micro-particles (mainly microplastics), and (iv) 10.2.1 Trends in the amount and composition of litter ingested by marine animals. Monitoring the impacts of litter will be considered further in 2014. At that time, the strategy will be discussed in the context of the... |
| Tipo: Text |
Palavras-chave: Marine litter; MSFD; Good Environmental Status; Monitoring; Sea turtles; Marine mammals; Seabirds; Fulmar. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00177/28822/27299.pdf |
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| Peron, Clara; Authier, Matthieu; Gremillet, David. |
| Aim Species distribution models (SDMs) are statistical tools aiming at mapping and predicting species distributions across landscapes. Data acquisition being limited in space and time, SDM are commonly used to predict species distribution in unsampled areas or years, with the expectation that modelled habitat-species relationships will hold across spatial or temporal contexts (i.e., model transferability). This key aspect of habitat modelling has major implications for spatial management, yet it has received limited attention, especially in the dynamic marine realm. Our aims were to test geographical and temporal habitat model transferability and to make recommendations for future population-scale habitat modelling. Location Methods Two contrasted regions... |
| Tipo: Text |
Palavras-chave: Biologging; Central-place foragers; Extrapolation; Habitat modelling; Seabirds; Transferability. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00470/58174/75133.pdf |
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| Paredes, Rosana; Orben, Rachael A.; Roby, Daniel D.; Irons, David B.; Young, Rebecca; Renner, Heather; Tremblay, Yann; Will, Alexis; Harding, Ann M. A.; Kitaysky, Alexander S.. |
| Causes and consequences of differences in seabird foraging strategies between breeding colonies are not well understood. We tested whether body size of a pursuit-diving seabird, the thick-billed murre Uria lomvia, differs between breeding colonies and, if so, how size differences can be understood in the context of differences in foraging behavior, habitat use, and breeding performance. We measured adult murres over 3 seasons (2008 to 2010) at 2 of the Pribilof Islands, St. Paul and St. George, located on the continental shelf of the Bering Sea at different distances from the shelf break. Body mass and size were positively associated with deep diving and negatively associated with long flights, suggesting morphology influences foraging and commuting... |
| Tipo: Text |
Palavras-chave: Body size; Foraging; Diving; Marine habitats; Stress levels; Bering Sea; Murres; Seabirds. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00626/73837/73678.pdf |
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| Lambert, C.; Authier, M.; Doray, Mathieu; Doremus, G.; Spitz, J.; Ridoux, V.. |
| Most oceanographic systems, especially shelf ecosystems, are characterised by interannual variability in the timing, extent and intensity of their seasonal patterns. Such interannual variations have important consequences on top predator habitat preferences. Capitalising on oceanographic surveys performed every spring since 2004 in the Bay of Biscay (BoB), this study explored interannual variations in habitat preferences exhibited by five mobile top predator species: bottlenose and common dolphins, auks, fulmars and northern gannets. We expected to find species with similar habitat preferences every year or species exhibiting important variability in their habitat preferences. First, we identified with a Principal Component Analysis (PCA) three different... |
| Tipo: Text |
Palavras-chave: Habitat preference; Temporal variability; Cetaceans; Seabirds; North Atlantic; Bay of Biscay. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00431/54226/55549.pdf |
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| Hyrenbach, K. David; Veit, Richard R.; Weimerskirch, Henri; Metzl, Nicolas; Hunt, George L., Jr.. |
| Our objective was to understand how marine birds respond to oceanographic variability across the Southern Indian Ocean using data collected during an 16-day cruise (4-21 January 2003). We quantified concurrent water mass distributions, ocean productivity patterns, and seabird distributions across a heterogeneous pelagic ecosystem from subtropical to sub-Antarctic waters. We surveyed 5155 kin and sighted 15,606 birds from 51 species, and used these data to investigate how seabirds respond to spatial variability in the structure and productivity of the ocean. We addressed two spatial scales: the structure of seabird communities across macro-mega scale (1000 s km) biogeographic domains, and their coarse-scale (10 s km) aggregation at hydrographic and... |
| Tipo: Text |
Palavras-chave: Community structure; Seabirds; Ocean productivity; Oceanic fronts; Remote sensing; Species assemblages; Crozet basin; Indian ocean. |
| Ano: 2007 |
URL: https://archimer.ifremer.fr/doc/00235/34628/32969.pdf |
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| The Red Sea and the Gulf of Aden represent a complex and unique tropical marine ecosystem. The Red Sea was formed by the northerly extension of the African rift valley system and is about 2,000 km long. The Gulf of Aden is a branch of the Indian Ocean and has a length of 1,400 km. The region has a remarkably high biological diversity and a high degree of endemism, particularly for fish and corals. Information available on seabirds for the region is limited, with the majority of studies carried out one to two decades ago. Accounts indicate that there are 17 true seabird species and 14 other water bird species. Among these birds the Jouanin’s petrel and swift tern have the smallest sub-populations. The white-eyed gull, endemic to the Red Sea and Gulf of... |
| Tipo: Report |
Palavras-chave: Aquatic birds; Seabirds; Http://aims.fao.org/aos/agrovoc/c_330065. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/354 |
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| CARLOS,CAIO JOSÉ; ALVARENGA,JÉSSICA GUIMARÃES; MAZZOCHI,MARIANA SCAIN. |
| ABSTRACT In this paper, we describe the skulls of Magnificent Frigatebird Fregata magnificens (Fregatidae) and Brown Booby (Sulidae) Sula leucogaster, with focus on the structures associated with the Musculi mandibulae. We discuss the results in the context of the feeding biology of the two species, which feed mainly on flying fish and squids. Frigatebirds capture prey from just above, or just below, the water surface in flight. The hook-shaped Apex maxillae in F. magnificens can be viewed as an adaptation for grasping prey from near the water surface. Boobies catch prey by plunging; thus, the dorsoventrally flattened skull and conical bill of S. leucogaster may reduce water resistance when it dives, or swims underwater. The bill is long in both species,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Functional anatomy; Jaw apparatus; Mandible musculature; Seabirds; Syncranium. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492017002000265 |
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| Carlos,Caio J.; Voisin,Jean-François. |
| The type locality of the South American Tern, Sterna hirundinacea, has long been considered to be the state of Santa Catarina in South Brazil. This conclusion was probably based on two syntypes, from the Muséum national d'Histoire naturelle in Paris, France, one from Laguna and the other from an unspecified locality. The latter was probably shot on the coast of Rio de Janeiro. A recent molecular study has shown that Brazilian and Patagonian populations of S. hirundinacea are not completely panmictic, though genetic differentiation between them is low. No data from the Falkland Islands and Pacific coast populations have been available for comparison. If future analysis shows that Pacific and/or Falkland/Malvinas populations are genetically isolated from the... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Brazil; Nomenclature; Seabirds; Taxonomy. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000300017 |
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| Carlos,Caio J.; Fedrizzi,Carmem E.. |
| We review existing data on the distribution of the Least Tern, Sternula antillarum along the Brazilian coast, based on the literature and museum specimens, and present results of a year-long study (October 2008 to September 2009) on the seasonal abundance of this species on a large tidal flat area, Cajuais Bank, in the State of Ceará, north-eastern Brazil. We evaluate whether the observed variation in the abundance of terns is due to the occurrence of an undocumented breeding colony, or alternatively, whether it results from an influx of migrants from the Northern Hemisphere. The recovery of historical data revealed that all literature references on the distribution of birds in the Americas, published up to the late 1990s include Brazil in the non-breeding... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coastal habitats; Nearctic-Neotropical migration; Seabirds. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000200003 |
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| SIMEONE,ALEJANDRO; NAVARRO,XIMENA. |
| We analyzed a collection of 738 bird bones, representing a minimum of 71 individuals, found in a settlement of hunter-gatherers from the mid-Holocene, 5,000 years BP, in the coastal locality of Chan Chan, southern Chile. The camp was inhabited for over ca. 500 years, during which time a steady hunting pressure on the local marine resources was exerted, particularly on seabirds. The most abundant taxon (bones/number of individuals) was the red-legged cormorant Phalacrocorax gaimardi (551/44) which was also the prey which provided the highest edible proportion of body mass. Albatrosses Thalassarche cf. melanophris (103/12) and shearwaters Puffinus cf. griseus (20/5) were secondary prey. Cormorants were presumably hunted at their breeding colonies (which are... |
| Tipo: Journal article |
Palavras-chave: Zooarchaeology; Hunter-gatherers; Holocene; Seabirds; Phalacrocorax; Chile. |
| Ano: 2002 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000200012 |
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| Branco,Joaquim Olinto. |
| From July 1996 to June 1997, in Armação do Itapocoroy, Penha, Santa Catarina State, Brazil, monthly census were done in three areas of traditional fishery and Itacolomis islands. A total of 10021 seabirds were registered, belonging to eight species, five genus and four families. The average number of seabirds per dragging varied between 80,2 and 113,6. Sterna spp, appeared at first in 43,3% of the released by-catch, followed by Larus dominicanus Lichtenstein, 1823, Fregata magnificens Matheus, 1914, Phalacrocorax brasilianus (Humboldt, 1805) and Sula leucogaster Boddaert, 1783. The average size of the fish consumed by the seabirds oscillated from 8,3 cm (Sterna spp.) to 18,5 cm (F. magnificens), with an average time from 6,12 to 7,55 minutes per by-catch... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seabirds; By-catch; Feeding. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000100033 |
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| Branco,Joaquim Olinto. |
| On the Brazilian coast, those species nest sympatrically, from the islands of Espírito Santo State to Santa Catarina State. From 1999 to 2002 a sampling program was implanted with the objectives of studying the breeding of S. hirundinacea and S. eurygnatha along Santa Catarina coast. The size of colonies in number of couples, reproduction strategy, length, width, weight and the volume of the eggs, as well as bill length and weight of the nestlings were determined. S. hirundinacea youth weight/length relationship was estimated and the reproductive success of the terns colonies was also determined. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation; Seabirds; Terns. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000400017 |
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| Barbieri,Edison; Paes,Eduardo Tavares. |
| Birds were censused weekly from January 1999 to January 2001 along Ilha Comprida beach, a barrier island off São Paulo, southeastern Brazil. To evaluate the similarity in the bird's species composition among the weekly surveys, species counts data were arranged on a data matrix with 144 weekly surveys, analyzed following a multivariate analysis protocol. We counted a total of 205,399 individuals and 52 species. Migratory birds were an important component of the avifauna (maximum N = 21,294 individuals and 14 species). The largest numbers of birds were observed during summer, when Nearctic migrants arrive. All 14 of the most common species were migrants, including Calidris alba, Sterna maxima, Charadrius semipalmatus, Sterna hirundo, Thalasseus maximus,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seabirds; Ecology; Ilha Comprida; Migration; Shorebirds; Sandy beaches; Multivariate analysis. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032008000300003 |
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| Vaske Júnior,Teodoro. |
| An analysis of published data on oceanic seabirds diets, show the predominance of muscular cephalopods with superficial distribution in the oceanic layers, but also important are the gelatinous and ammoniacal species restrict to layers below 300 m from the surface. In principle, it could be not expected that deep-sea cephalopods are common prey for seabirds like several authors have been concluded. It is proposed in this study that an indirect source, important and easily attainable, have been appeared with the beginning of tuna longline operations. The habit to feed upon viscera of the fishes captured by tuna longliners, that discard the gut contents to the water, may explain the probable equivocal conclusions that deep dwelling cephalopods are natural... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Squid; Octopus; Seabirds; Prey-predator. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000100018 |
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| Registros recuperados: 23 | |
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