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Registros recuperados: 7
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Body condition influences ontogeny of foraging behavior in juvenile southern elephant seals ArchiMer
Orgeret, Florian; Cox, Samantha; Weimerskirch, Henri; Guinet, Christophe.
Ontogeny of diving and foraging behavior in marine top predators is poorly understood despite its importance in population recruitment. This lack of knowledge is partly due to the difficulties of monitoring juveniles in the wild, which is linked to high mortality early in life. Pinnipeds are good models for studying the development of foraging behaviors because juveniles are large enough to robustly carry tracking devices for many months. Moreover, parental assistance is absent after a juvenile departs for its first foraging trip, minimizing confounding effects of parental input on the development of foraging skills. In this study, we tracked 20 newly weaned juvenile southern elephant seals from Kerguelen Islands for up to 338 days during their first trip...
Tipo: Text Palavras-chave: Accelerometers; Diving behavior; Early-life; First-year juveniles; Foraging behavior; Ontogeny; Satellite relay tags; Southern elephant seals.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00482/59380/62484.pdf
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Composición de la dieta y conducta del pastoreo de terneras (Bos taurus x Bos indicus) en un sitio con vegetación secundaria en el norte de Veracruz Colegio de Postgraduados
Velázquez Martínez, Mauricio.
Se estudió el comportamiento del pastoreo, selección de la dieta y ganancia de peso de terneras (sin y con modelos sociales) en un sitio con alta diversidad de especies de plantas. El estudio se llevo acabo en un ecosistema tropical que contenía una mezcla de zacates, herbáceas hoja ancha, vegetación leñosa y semileñosa. Diez terneras Bos taurus x Bos indicus (6 a 8 meses de edad) fueron asignadas aleatoriamente a uno de dos tratamientos: terneras sin experiencia (T1; n=5) con peso de 131.4 ± 14.1 kg, y terneras sin experiencia (T2; n=5) con peso de 129.6 ± 6.4 kg acompañadas por dos modelos sociales (16 meses de edad) con peso de 153.3 ± 4.1. Cada grupo de animales pastorearon en potreros separados durante un periodo de 12 semanas, y los animales...
Tipo: Tesis Palavras-chave: Terneras; Comportamiento del pastoreo; Selección de dieta; Ganancia de peso; Diversidad de plantas; Maestría; Ganadería; Heifers; Foraging behavior; Diet selection; Weight gain; Plant diversity.
Ano: 2008 URL: http://hdl.handle.net/10521/1413
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Diet of four annual killifishes: an intra and interspecific comparison Neotropical Ichthyology
Laufer,Gabriel; Arim,Matías; Loureiro,Marcelo; Piñeiro-Guerra,Juan Manuel; Clavijo-Baquet,Sabrina; Fagúndez,César.
We examined the diet of 4 annual fishes, Austrolebias viarius, Austrolebias cheradophilus, Austrolebias luteoflammulatus and Cynopoecilus melanotaenia inhabiting temporal ponds of southeastern Uruguay, by analysis of stomach contents. Fishes were captured from fifty ephemeral ponds of Castillos Lagoon basin, in the region of the Humedales del Este. We identified 13099 individual prey items extracted from 669 stomachs of the four captured species. In the studied system, annual killifishes represents the most abundant and conspicuous top predators. Killifishes are generalist key predators at the ephemeral ponds of the studied system, consuming mostly aquatic items. Zooplancton represented the bulk of the diet in the four analyzed species, followed by eggs,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Annual fishes; Foraging behavior; Predators; Food analysis.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000100010
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How do macrobenthic resources concentrate foraging waders in large megatidal sandflats? ArchiMer
Ponsero, Alain; Sturbois, Anthony; Desroy, Nicolas; Le Mao, Patrick; Jones, Auriane; Fournier, Jerome.
The relationship between foraging shorebirds, macrobenthos and sedimentary parameters has been widely studied across Western Europe. Megatidal areas have large zones uncovered when the water retreats. Consequently, in such cases, the tide also influences foraging activities. This paper examines the use of an intertidal space by waders to define how macrobenthic resource concentrates foraging activity of birds in a large megatidal sandflat. This approach combines accurate spatial distribution of waders (Oystercatcher, Eurasian curlew, Bar-tailed Godwit and Redknot) according to their activity with ecological/biological parameters. A differential exploitation of the flat is clearly shown, with macrobenthic biomass appearing as one of the main explanatory...
Tipo: Text Palavras-chave: Waders; Benthos; Foraging behavior; Sandflat; Megatidal environment.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00340/45168/44563.pdf
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Live coral predation by parrotfishes (Perciformes: Scaridae) in the Abrolhos Bank, eastern Brazil, with comments on the classification of species into functional groups Neotropical Ichthyology
Francini-Filho,Ronaldo B.; Moura,Rodrigo L.; Ferreira,Camilo M.; Coni,Ericka O. C..
Parrotfishes (Perciformes: Scaridae) represent a critical functional group on coral reefs because their intense herbivory activity helps in avoiding coral overgrowth by algae. Although feeding preferentially on algae and detritus, some parrotfish species also consume live corals, leading to detrimental effects that may offset the benefits of removing competitive seaweeds. Parrotfish species differ markedly in terms of jaw morphology, foraging activity and extent of substratum excavation, and are typically divided into three functional groups: browsers, scrapers and excavators. The recognition of species within each functional group helps to understand their relative effects in terms of bioerosion, coral fitness and survival, habitat alteration and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Foraging behavior; Bioerosion; Grazing scars; Scarus trispinosus; Sparisoma amplum.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000200006
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Model-Based Estimation of Collision Risks of Predatory Birds with Wind Turbines Ecology and Society
Eichhorn, Marcus; UFZ-Helmhotz Centre for Environmental Research; marcus.eichhorn@ufz.de; Johst, Karin; UFZ-Helmhotz Centre for Environmental Research; karin.johst@ufz.de; Seppelt, Ralf; UFZ-Helmhotz Centre for Environmental Research; ralf.seppelt@ufz.de; Drechsler, Martin; UFZ-Helmholtz Centre for Environmental Research; martin.drechsler@ufz.de.
Tipo: Peer-Reviewed Reports Palavras-chave: Collision risk; Foraging behavior; Impact assessment; Individual-based model; Milvus milvus; Red Kite; Spatial model; Wind power.
Ano: 2012
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Pachycondyla obscuricornis as natural enemy of the spittlebug Deois flavopicta. Repositório Alice
SUGII, E.R.; GARCIA, M.A.; FONTES, E.M.G.; O'NEIL, R.J..
The objective of this work was to evaluate the potential control of the ant Pachycondyla obscuricornis Emery (Hymenoptera: Formicidae) on populations of nymphs of the spittlebug, Deois flavopicta Stal (Hemiptera: Cercopidae). Foraging behavior and prey consumption rate of P. obscuricornis were evaluated. Field data revealed that P. obscuricornis does not show aggressive behavior against individuals of the same species, when they are not carrying a prey; they can patrol distances larger than 10 m searching for prey, and they can build their nest as close as 1 m from each other. The ant has a solitary patrolling habit, there is no recruitment behavior, and individuals dislocate fast, browsing on soil and vegetation for prey. Predation rate on spittlebug...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Insecta; Biological control; Foraging behavior; Predation; Controle biológico; Comportamento de forrageamento; Predação.
Ano: 2004 URL: http://www.alice.cnptia.embrapa.br/handle/doc/111748
Registros recuperados: 7
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