Consulta: subjectFacets:"Prey size"
Registros recuperados: 4
Data/hora: 01/06/2024 08:04:20

Summer diet comparison between the American Kestrel (Falco sparverius) and Aplomado Falcon (Falco femoralis) in an agricultural area of Araucanía, southern Chile
Provedor de dados: 68
Autores: Figueroa Rojas,Ricardo A.; Corales Stappung,E. Soraya.
The diet of the American Kestrel (Falco sparverius) and Aplomado Falcon (Falco femoralis) was quantified by analysis of their pellets during the summer 1997-1998 in an agricultural area of Araucanía, southern Chile. By number, the most important prey of the American Kestrel were insects (61% of all individual prey) followed by birds (23%), rodents (13.7%) and reptiles (2.6%). Avian prey accounted for the highest biomass contribution (79.6%), followed by rodents (18%). Biomass contribution of insects and reptiles was negligible. Birds were the staple prey of the Aplomado Falcon both by number (89%) and biomass (99%). Number and biomass contribution of rodent and insect prey was minute. Diet of both raptor species did not broadly overlap. Both the American...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: American Kestrel; Aplomado Falcon; Diet overlap; Falco sparverius; Falco femoralis; Prey size; Sicalis luteola; Southern Chile.
Ano: 2004
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072004000200002

Buccal apparatus and gastrointestinal tract dimensions associated to the diet of early life stages of Centropomus undecimalis (Centropomidae, Actinopterygii)
Provedor de dados: 76
Autores: Araújo,Isabela M. S; Silva-Falcão,Elisabeth C; Severi,William.
The present study aims to compare the buccal apparatus and gastrointestinal tract of early life stages of Centropomus undecimalis (Bloch, 1792), and relate them to its diet. A total of 190 individuals collected with a channel net in the Catuama estuary (07º40'9.9''S, 34º50'36.7''W), northern coast of the state of Pernambuco, were examined. Morphometrical and meristic data were analyzed for the two initial developmental periods (larval and juvenile). Their digestive tube was morphologically characterized and its content identified. The longest transverse axis of food items was measured, and compared to the standard length (SL) and mouth gape size (D) of the individuals. Body measurement regressions differed significantly (p&lt;0.001) between larvae and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gape size; Prey size; Larvae; Juveniles; Common snook.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000100012

Diet composition and feeding strategy of the southern pipefish Syngnathus folletti in a Widgeon grass bed of the Patos Lagoon Estuary, RS, Brazil
Provedor de dados: 83
Autores: Garcia,Alexandre M.; Geraldi,Ricardo M.; Vieira,João P.
Pipefish species are poorly known representatives of the family Syngnathidae, which have been increasingly threatened by anthropogenic activities. We describe the diet composition and feeding strategy of southern pipefish Syngnathus folletti inhabiting a Widgeon grass (Ruppia maritima L.) bed in the estuarine zone of Patos Lagoon, southern Brazil. We also investigated whether mouth gape affected the size of prey items consumed and based on indirect evidence, we suggest possible pipefish foraging movements within the bed. Individuals were collected from December 1994 to March 1995 in a Ruppia maritima bed located in the Patos Lagoon Estuary during day and night periods. We analyzed the stomach contents of 108 individuals (54 females and 54 males). Both...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Syngnathidae; Ruppia maritima; Feeding ecology; Size-biased feeding; Prey size.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000300011

Meal size effects on the postprandial metabolic response of Bothrops alternatus (Serpentes: Viperidae)
Provedor de dados: 103
Autores: Gavira,Rodrigo S. B.; Andrade,Denis V.
We examined the effects of meal size on the postprandial metabolic response of the lancehead Bothrops alternatus (Duméril, Bibron &amp;amp; Duméril, 1894), fed mice equaling to 5, 10, 20, and 40% of the snake's body mass. The maximum O2 consumption rates measured during digestion increased with meal size, reaching levels up to 2.8-7.8-fold higher than the metabolic rate measured during fasting. Specific Dynamic Action (SDA) duration also increased with meal size, lasting from 54 to 212 hours to complete. Under our experimental conditions, 30ºC, the majority of our snakes failed to completely digest prey with a relative size of 40%. The SDA coefficient ranged from 17 to 27% of the energy content of the meal and was not affected by meal size.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Metabolism; Postprandial; Prey size; Snakes.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000300005