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| Registros recuperados: 13 | |
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| Figueroa Rojas,Ricardo A.; Corales Stappung,E. Soraya; Alvarado O.,Sergio. |
| The diet of Red-backed Hawk (Buteo polyosoma) was quantified by analyzing 40 pellets collected during winter and spring 1999 and winter 2000 in a forested area of Aysén, Chilean Patagonia. Rodents were the most numerous prey (82% of all prey), and accounted for the highest contribution to total biomass (83%). Among rodents, Oligoryzomys longicaudatus was the most consumed prey species, accounting for 70% of total number and 64% of total biomass. Birds accounted for less than 6% in number, but their biomass contribution was significantly higher (more than 15%). Insects constituted 12% in number, but less than 0.5% of total biomass. The Red-backed Hawk seemed to consume Oligoryzomys longicaudatus according to their field abundance. Also, it seemed to prey... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Buteo polyosoma; Chilean Patagonia; Diet; Oligoryzomys longicaudatus; Prey selection; Red-backed Hawk. |
| Ano: 2003 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072003000100006 |
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| Spitz, Jerome; Chouvelon, Tiphaine; Cardinaud, M.; Kostecki,; Lorance, Pascal. |
| In the northeastern Atlantic, adult sea bass (Dicentrarchus labrax) is one of largest fish living on the shelf, and this species has important commercial value. However, pelagic trawl fisheries that target sea bass have negative operational interactions with common dolphins (Delphinus delphis). Our goal was to determine the diet of adult sea bass in the Bay of Biscay from stomachcontent and stable-isotope analyses, and explore the dietary overlap between sea bass and common dolphins. We found that sea bass primarily target small pelagic fish, most notably mackerel (Scomber scombrus), scads (Trachurus spp.), anchovy (Engraulis encrasicolus), and sardine (Sardina pilchardus). These four species also dominated the diets of common dolphins. This overlap in... |
| Tipo: Text |
Palavras-chave: Chesson's index; Marine top predator; Prey selection; SIAR; Stable isotope; Stomach content. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00125/23625/21485.pdf |
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| Spitz, Jerome; Ridoux, Vincent; Brind'Amour, Anik. |
| 1. Understanding ‘Why a prey is a prey for a given predator?’ can be facilitated through trait-based approaches that identify linkages between prey and predator morphological and ecological characteristics and highlight key functions involved in prey selection. 2. Enhanced understanding of the functional relationships between predators and their prey is now essential to go beyond the traditional taxonomic framework of dietary studies and to improve our knowledge of ecosystem functioning for wildlife conservation and management. 3. We test the relevance of a three-matrix approach in foraging ecology among a marine mammal community in the northeast Atlantic to identify the key functional traits shaping prey selection processes regardless of the taxonomy... |
| Tipo: Text |
Palavras-chave: Foraging strategy; Fourth-corner method; Functional ecology; Marine mammals; Prey selection; RLQ analysis. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00189/30047/29495.pdf |
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| Larson, R.J.. |
| LARSON, R.J., 1997. Feeding behaviour of Caribbean Scyphomedusae: Cassiopea frondosa (Pallas) and Cassiopea xamachana (Bigelow). Studies Nat. Hist. Caribbean Region 73, Amsterdam 1997: 43-54. Cassiopea frondosa and C. xamachana are carnivorous. Prey are filtered from the water by the pumping activity of the umbrella. Prey, predominantly small epibenthic crustaceans (0.2- 10 mm in length) are caught mostly by interception. However, some prey may impact on the oral surface through turbulence or by their own locomotion. Prey capture was essentially the same for both species, except that the vesicles take an active part in prey capture only in C. frondosa. Ingestion occurred after the digitate-fringed lips of the funnel-shaped oral ostia opened. The digitata... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Feeding; Scyphomedusae; Prey selection; Puerto Rico.; Caribbean; Medusae; Cassiopea. |
| Ano: 1997 |
URL: http://www.repository.naturalis.nl/record/503184 |
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| Sánchez, M.F.; Garcia de la Rosa, S.B.. |
| Feeding of Argentine hake during winter 1994, between 50 and 370 m of depth, in the studied area (34°50'-47°S), is based on the consumption of zooplanktonic crustaceans, fishes and cephalopods. Maximum feeding incidence is found at 36°-40°S (51. ), in sea layer of 80-130 m deep (62. ) and between 8:00-10:00 hours (36,6. ). Cluster analysis shows five spatial groups, with similar length distributions and characteristic principal prey items combination. The males of all sizes show a trend to feed on euphausids and hiperiids amphipods. The females eat more quantities of hake, short fin squid and other fishes. There is a change in diet related with predator size, from 47 cm TL onwards for males, and from 53 cm TL for females. This change consists in a decrease... |
| Tipo: Journal Contribution |
Palavras-chave: Feeding; Cannibalism; Food organisms; Prey selection; Feeding; Cannibalism; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_9580. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/1874 |
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| Rito,Kátia F.; Hanashiro,Fabio T.T.; Peixoto,Paulo E.C.; Gonzaga,Marcelo O.. |
| ABSTRACT Strategies that increase foraging efficiency may also increase predation risk. We investigated how individuals of Hingstepeira folisecens Hingston, 1932, which build shelters at the orb hub, modulate their foraging behaviors in response to the trade-off between capturing prey and becoming exposed by leaving their shelters. We evaluated whether the position of the prey on the web alters the frequency at which spiders leave their shelters. Hingstepeira folisecens spiders were more likely to capture prey positioned below than above the entrance of the shelter. Moreover, when the prey was near the entrance of the shelter, the spider pulled the threads with the entangled prey without leaving the shelter. Conversely, when the prey was distant from the... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Orb-web spiders; Prey selection; Silk investment. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000304001 |
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| Gabriel,Vagner de A.; Pizo,Marco A.. |
| In this paper we present data on the foraging maneuvers and substrates used to capture preys by 28 species of tyrant flycatchers (Tyrannidae) in Brazil. For six species: Arundinicola leucocephala Linnaeus, 1764, Fluvicola nengeta Linnaeus, 1766, Machetornis rixosa Vieillot, 1819, Myiozetetes similis Spix, 1825, Pitangus sulphuratus Linnaeus, 1766, and Tyrannus melancholicus Vieillot, 1819 -, we go further to investigate perch height, search time, sally distance, and sally angle. With a few exceptions, sally strike was the most frequent foraging maneuver. Living foliage and air were the most frequent substrates used to capture preys. Among the six species studied in detail we found three distinct groups of perch heights: F. nengeta and M. rixosa foraged on... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Birds; Feeding behavior; Foraging maneuvers; Prey selection. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000400036 |
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| Registros recuperados: 13 | |
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