Comparing composition of social groups, mating system and social behaviour in two populations of Microcavia australis

Taraborelli, Paula Andrea; Moreno, Pablo

doi:10.1016/j.mambio.2008.08.002

Cited by 26 publications

(30 citation statements)

References 35 publications

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“…Our observation that social groups were larger at Rinconada than Los Molles suggests that social group formation and maintenance is not driven by social thermoregulation. These findings depart from studies of single populations or comparisons of multiple populations in mammals (mostly rodents) where the extent of grouping tracks changes in ambient temperature (West 1977; Madison 1984; Stapp et al 1991; Edelman and Koprowski 2007; Taraborelli and Moreno 2009). However, our results are in agreement with studies on voles (Getz and McGuire 1997) and badgers (Johnson et al 2002) in which group size is uncoupled from ambient temperatures.…”

Section: Discussioncontrasting

confidence: 86%

Ecological drivers of group living in two populations of the communally rearing rodent, Octodon degus

Ebensperger

Sobrero

Quirici

et al. 2011

Behav Ecol Sociobiol

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Intraspecific variation in sociality is thought to reflect a trade-off between current fitness benefits and costs that emerge from individuals' decision to join or leave groups. Since those benefits and costs may be influenced by ecological conditions, ecological variation remains a major, ultimate cause of intraspecific variation in sociality. Intraspecific comparisons of mammalian sociality across populations facing different environmental conditions have not provided a consistent relationship between ecological variation and group-living. Thus, we studied two populations of the communally rearing rodent Octodon degus to determine how co-variation between sociality and ecology supports alternative ecological causes of group living. In particular, we examined how variables linked to predation risk, thermal conditions, burrowing costs, and food availability predicted temporal and population variation in sociality. Our study revealed population and temporal variation in total group size and group composition that covaried with population and yearly differences in ecology. In particular, predation risk and burrowing costs are supported as drivers of this social variation in degus. Thermal differences, food quantity and quality were not significant predictors of social group size. In contrast to between populations, social variation within populations was largely uncoupled from ecological differences.

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Section: Discussioncontrasting

confidence: 86%

Ecological drivers of group living in two populations of the communally rearing rodent, Octodon degus

Ebensperger

Sobrero

Quirici

et al. 2011

Behav Ecol Sociobiol

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“…Groups are composed of several females, one or few males, plus the young and juveniles (Rood 1967 and1972). In the Central Monte, the social groups were formed by three to six cavies (Taraborelli and Moreno 2009). Rood (1972) and Taraborelli and Moreno (2009) assert that the mating system in this species is promiscuous, that females mate indiscriminately with any male, and cavies show absence of sexual dimorphism.…”

Section: Introductionmentioning

confidence: 99%

“…In the Central Monte, the social groups were formed by three to six cavies (Taraborelli and Moreno 2009). Rood (1972) and Taraborelli and Moreno (2009) assert that the mating system in this species is promiscuous, that females mate indiscriminately with any male, and cavies show absence of sexual dimorphism. This cavy displays its behavioral patterns in the burrow area, under the cover provided by trees and/or shrubs where predation risks are lower (Rood 1967;Tognelli et al 1995).…”

Section: Introductionmentioning

confidence: 99%

Influence of predation risk and plant structure on vigilance and intermittent locomotion in Microcavia australis (Rodentia, Caviidae)

et al. 2010

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The aim of this study was to analyze and compare vigilance behavior and intermittent locomotion at two sites (El Leoncito and Ñacuñán, Argentina) that differ in predation risk, plant structure, and plant resource availability. Subjects were lesser cavies (Microcavia australis), a social species that is semi-fossorial, diurnal, and native to South America. Continuous focal sampling was conducted during the day, at times of food shortage, food abundance, and reproduction from 2003 to 2005. The proportion of time spent vigilance was significantly higher at Ñacuñán, where vigilance peaked at midday and reached a minimum in the evening. This midday peak of vigilance at Ñacuñán was associated with a midday peak of danger from raptors as indicated by a raptor activity peak at that time. In contrast, both vigilance and predator activity at El Leoncito were constant through the day. Records of intermittent locomotion and number and duration of pauses in locomotion were significantly higher at El Leoncito, a difference that may have been due to the need for greater vigilance while moving across areas of less protective cover at this site.

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“…They present a mating system classified as polygamous (Taraborelli, 2009), and are able to reproduce the whole year in captivity, with no report regarding the influence of the seasonality on their reproduction . The male presents ovoid testicles located in the inguinal canal, abdominal cavity or in the inguinal position, with a welldefined scrotum.…”

Section: Reproductive Aspectsmentioning

confidence: 99%

Conservation of germplasm derived from spix’s yellow-toothed cavies (Galea spixii WAGLER, 1831)

Silva¹,

Silva²,

Paxedes³

2017

SPERMOVA

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RESUMENLa importancia ecológica y económica de la Galea spixii, un roedor histricomorfos, ha despertado el interés de los investigadores en el desarrollo de estudios centrados en la conservación de su germoplasma. En este sentido, esta revisión presenta información publicada sobre métodos para obtener y caracterizar gametos masculinos y femeninos. Además, se muestran datos interesantes sobre la congelación de los espermatozoides y la vitrificación del tejido testicular y ovárico. Estos estudios prometedores evidencian las posibilidades de mejorar otras técnicas de reproducción asistida centradas en la multiplicación y conservación de G. spixii.Palabras clave: Rodentia, cavia, vida Silvestre, espermatozoide, ovocito. ABSTRACTThe ecological and economical importance of the Galea spixii, a hystricognath cavid rodent, has aroused the interest of the researchers at developing studies focused on the conservation of its germplasm. In this sense, this review presents published information regarding methods for obtaining and characterizing both male and female gametes. Moreover, interesting data regarding sperm freezing and vitrification of testicular and ovarian tissue are shown. Such promising studies evidence the possibilities for improving other assisted reproductive techniques focused on G. spixii multiplication and conservation.

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Comparing composition of social groups, mating system and social behaviour in two populations of Microcavia australis

Cited by 26 publications

References 35 publications

Ecological drivers of group living in two populations of the communally rearing rodent, Octodon degus

Ecological drivers of group living in two populations of the communally rearing rodent, Octodon degus

Influence of predation risk and plant structure on vigilance and intermittent locomotion in Microcavia australis (Rodentia, Caviidae)

Conservation of germplasm derived from spix’s yellow-toothed cavies (Galea spixii WAGLER, 1831)

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