Trophic-Niche Relationships among Galictis cuja, Dusicyon culpaeus, and Tyto alba in Central Chile

Ebensperger, Luis A.; Mella, Jorge; Simonetti, Javier A.

doi:10.2307/1381849

Cited by 41 publications

(48 citation statements)

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“…Studies from Argentina describe the grison's diet as being based on rodents and introduced lagomorphs, which comprise > 95% of the biomass intake (Delibes et al 2003). Similarly, Zapata et al (2005) found a diet based on rodents (56% of biomass) and lagomorphs (34.5%) from the southern limit of the species' distribution, while Ebensperger et al (1991) described G. cuja as preying on rabbits, rodents, and small marsupials in central Chile. However, in our study, we found no evidence that the grison consumed lagomorphs, despite the high abundance of Lepus europaeus (Pallas, 1778) in some parts of Rio Grande do Sul (Kasper et al 2012a).…”

Section: Discussionmentioning

confidence: 99%

Trophic relationships of sympatric small carnivores in fragmented landscapes of southern Brazil: niche overlap and potential for competition

et al. 2016

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Between 2000 and 2010, digestive tracts collected from carnivore carcasses found in southern Brazil were analyzed to determine the frequency and proportion of items constituting the diets of each species. Material was collected and analyzed from 194 animals of 10 species: Cerdocyon thous, Lycalopex gymnocercus (Canidae), Procyon cancrivorus (Procyonidae), Galictis cuja (Mustelidae), Conepatus chinga (Mephitidae), Leopardus colocolo, Leopardus geoffroyi, Leopardus guttulus, Leopardus wiedii, and Puma yagouaroundi (Felidae). Most of these species are sympatric, which makes them potential competitors when sharing, to a greater or lesser degree, the same resources. The food niche breadth was relatively narrow, demonstrating that even generalist species, such as the crab-eating raccoon, used food resources rather unequally. An extensive overlap ( > 90%) in food niches was found among the cat species, the grison, and the Pampas fox, which had diets based on rodents. Crab-eating raccoons occupied a different food niche, based on aquatic or semiaquatic prey and fruits. Conepatus chinga was unique in exploiting arthropods and insect larvae as basic dietary items.

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Section: Discussionmentioning

confidence: 99%

Trophic relationships of sympatric small carnivores in fragmented landscapes of southern Brazil: niche overlap and potential for competition

et al. 2016

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“…This high frequency of studies is due mainly to the wide distribution of the species and to the habit of owls to regurgitate compact pellets with well preserved prey remains, usually under shelters or nests (Sick, 1997;Motta-Júnior and Alho, 2000;Bonvicino and Bezerra, 2003;Corrêa and Roa, 2005). In South America, information on the diet of the barn owl is concentrated on the south cone of the continent, mostly in Chile and Argentina (Jaksic et al, 1982;Ebensperger et al, 1991;Pardiñas and Cirignoli, 2002;Corrêa and Roa, 2005), and is still scarce in Brazil, where it has become incipient just recently (Motta-Júnior and Talamoni, 1996;Motta-Júnior and Alho, 2000;Bonvicino and Bezerra, 2003;Escarlate-Tavares and Pessoa, 2005).…”

Section: Introductionmentioning

confidence: 99%

Barn owl (Tyto alba) predation on small mammals and its role in the control of hantavirus natural reservoirs in a periurban area in southeastern Brazil

Magrini

Facure

2008

Braz. J. Biol.

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The aim of this study was to inventory the species of small mammals in Uberlândia, Minas Gerais, Brazil, based on regurgitated pellets of the barn owl and to compare the frequency of rodent species in the diet and in the environment. Since in the region there is a high incidence of hantavirus infection, we also evaluate the importance of the barn owl in the control of rodents that transmit the hantavirus. Data on richness and relative abundance of rodents in the municipality were provided by the Centro de Controle de Zoonoses, from three half-yearly samplings with live traps. In total, 736 food items were found from the analysis of 214 pellets and fragments. Mammals corresponded to 86.0% of food items and were represented by one species of marsupial (Gracilinanus agilis) and seven species of rodents, with Calomys tener (70.9%) and Necromys lasiurus (6.7%) being the most frequent. The proportion of rodent species in barn owl pellets differed from that observed in trap samplings, with Calomys expulsus, C. tener and Oligoryzomys nigripes being consumed more frequently than expected. Although restricted to a single place and based on few individuals, the present study allowed the inventory of eight species of small mammals in Uberlândia. The comparison of the relative frequencies of rodent species in the diet and in the environment indicated selectivity. The second most preyed upon species was N. lasiurus, the main hantavirus reservoir in the Cerrado biome. In this way, the barn owl might play an important role in the control of this rodent in the region, contributing to the avoidance of a higher number of cases of hantavirus infection.Keywords: Calomys tener, Hantavirus Cardio-Pulmonary Syndrome, Necromys lasiurus, prey selection, Strigiformes.Predação de pequenos mamíferos por suindara (Tyto alba) e seu papel no controle de reservatórios naturais de hantavírus em uma área periurbana no Sudeste do Brasil Resumo O objetivo deste estudo foi inventariar as espécies de pequenos mamíferos em Uberlândia, Minas Gerais, Brasil, com base em pelotas regurgitadas de suindara e comparar a freqüência das espécies de roedores na dieta e no ambiente. Como na região ocorre grande incidência de casos de hantavirose, também se avaliou a importância da suindara no controle de roedores que transmitem o hantavírus. Os dados de riqueza e abundância relativa de roedores no município foram fornecidos pelo Centro de Controle de Zoonoses, a partir de três amostragens semestrais com armadilhas. No total, foram encontrados 736 itens alimentares a partir da análise de 214 pelotas e fragmentos de regurgitação. Os mamíferos corresponderam a 86,0% dos itens alimentares e estiveram representados por uma espécie de marsupial (Gracilinanus agilis) e sete espécies de roedores, sendo os mais freqüentes Calomys tener (70,9%) e Necromys lasiurus (6,7%). A proporção das espécies de roedores nas pelotas da suindara diferiu daquela observada nas coletas com armadilhas, sendo que as espécies Calomys expulsus, C. tener e Oligoryzomys nigripes foram c...

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“…En relación con ello, en el noroeste de la Patagonia argentina, Diuck-Wasser & Cassini (1998) encontraron un mayor consumo de conejos (Oryctolagus cuniculus Linnaeus 1758), también cuando las abundancias de estas presas fueron más altas. Es importante destacar que en el área de estudio no están presentes los conejos, importantes en la alimentación del quique en Chile central (Ebensperger et al 1991) y el noroeste de la Patagonia argentina (Diuck-Wasser & Cassini 1998). Sin embargo, sí está presente (Dietrich 1984) la liebre europea (Lepus europaeus Pallas 1778), lagomorfo introducido y relevante en términos de la biomasa consumida por los quiques en el sureste de la Patagonia argentina (Zapata et al 2005).…”

Section: Resultsunclassified

“…A pesar de su amplia distribución geográfi ca es, sin embargo, una especie poco conocida. Respecto a su dieta se han publicado los siguientes trabajos: (i) uno en humedales del Este de Rocha, Uruguay (Kraus & Rödel 2004), (ii) otro en Chile central (Ebensperger et al 1991) y (iii) tres correspondientes a diferentes localidades de la Patagonia Argentina (Delibes et al 2003, Diuck-Wasser & Cassini, 1998, Zapata et al 2005. En general todos estos trabajos coinciden en que el principal componente de la dieta del quique corresponde a mamíferos (más del 90%), siendo sus principales presas roedores nativos y lagomorfos introducidos (2 especies), y un porcentaje casi despreciable correspondería a crustáceos, anfi bios, reptiles y aves.…”

Section: Introductionunclassified

Dieta del quique (Galictis cuja Molina 1782) en un remanente de bosque valdiviano fragmentado del sur de Chile

2012

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Dieta del quique (Galictis cujaMolina RESUMENPese a su amplia distribución y uso de diferentes hábitats en América del Sur existe poca información sobre el quique, Galictis cuja (Carnivora: Mustelidae). Inicialmente descrito como un mamífero generalista que vive cerca de ríos y con una dieta católica, estudios en Uruguay, Chile central y Argentina han mostrado que se especializa en roedores nativos y lagomorfos introducidos. En este trabajo se documenta por primera vez su dieta otoño-invernal en un remanente de bosque valdiviano fragmentado. En estas estaciones climáticas, donde la abundancia de roedores aumenta, la mayor frecuencia estandarizada de presas en la dieta del quique (82%) correspondió a 6 especies de roedores nativos cuyas masas corporales variaron entre 24 y 58 gramos. Pese a haber liebres europeas introducidas (Lepus europaeus) en la matriz agrícola donde se encuentra el fragmento estudiado, no se encontraron restos de ellas en las 45 muestras fecales analizadas, sugiriendo que los quiques cazaron sus presas al interior y/o en el borde del fragmento. PALABRAS CLAVES:Carnívoros, ecorregión valdiviana, fragmentación, hábitos alimenticios. ABSTRACTDespite its wide distribution and use of different habitats in South America, there is little information on the lesser grison Galictis cuja (Carnivora: Mustelidae). Initially described as a generalist mammal that lives near rivers and with a catholic diet, studies in Uruguay, central Chile and Argentina have shown that this mustelid preys on native rodents and introduced lagomorphs. In this paper, the fall and winter diet of the lesser grison in a fragmented Valdivian forest remnant is documented for the fi rst time. In these seasons, when the abundance of rodents increases, the highest standard frequency of prey in the diet of this carnivore mammal (82%) corresponds to 6 species of native rodents whose body masses ranged between 24 and 58 grams. Despite the presence of introduced European hares (Lepus europaeus) in the agricultural matrix, remains of hares were not found in the 45 fecal samples analyzed, suggesting that lesser grisons hunted their prey inside and/or at the edge of the fragment.

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Trophic-Niche Relationships among Galictis cuja, Dusicyon culpaeus, and Tyto alba in Central Chile

Cited by 41 publications

References 0 publications

Trophic relationships of sympatric small carnivores in fragmented landscapes of southern Brazil: niche overlap and potential for competition

Trophic relationships of sympatric small carnivores in fragmented landscapes of southern Brazil: niche overlap and potential for competition

Barn owl (Tyto alba) predation on small mammals and its role in the control of hantavirus natural reservoirs in a periurban area in southeastern Brazil

Dieta del quique (Galictis cuja Molina 1782) en un remanente de bosque valdiviano fragmentado del sur de Chile

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