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1

Seasonal patterns in the wood mouse population in Mediterranean scrubland

100%
Moreno S., Kufner M. B.
Acta Theriologica
|
1988
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tom 33
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nr 1-11
2

Predation risk, cover type, and group size in European rabbits in Donana [SW Spain]

100%
Villafuerte R., Moreno S.
Acta Theriologica
|
1997
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tom 42
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nr 2
As European rabbits Oryctolagus cuniculus (Linnaeus, 1758) in SW Spain face high prédation pressure, some antipredator tactics are expected. We examined rabbit group size in relation to the safety of the cover (sparse or dense), and the proximity to shrub cover. Stem density influenced the distance rabbits ventured from shrub; rabbits ventured greater distances when stem density in cover was higher. Rabbit group size was related to the distance to cover; solitary animals remained closer to protective cover, whereas rabbits in groups (> 3 animals) foraged further from cover. These results are consistent with the hypothesis that the formation of rabbit groups is related to defense against prédation, and that group size is influenced by risk of perception.
3

Evolutionary relationships of Ctenomys [Rodentia: Octodontidae] from Argentina, based on penis morphology

80%
Balbontin J., Reig S., Moreno S.
Acta Theriologica
|
1996
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tom 41
|
nr 3
Analyses of qualitative and quantitative variation in bacula and soft parts of the glans penis of 13 species of Ctenomys Blainville, 1926 from Argentina were used to suggest systematic and evolutionary relationships. The 13 species can be divided into spike-bearing {C. australis, C. azarae, C. porteousi, C. rionegrensis, and C. talarum) and spiny bulb-bearing species {C. dorbignyi, C. pearsoni, C. perrensi, C. roigi, Ctenomys sp. from Curuzú Laurel, Ctenomys sp. from M. F. Mantilla, and Ctenomys sp. from San Roque). Ctenomys yolandae is unique because it shows both spikes and spiny bulbs. In addition to spikes and spiny bulbs, some populations of C. pearsoni, C. talarum, and C. yolandae had a new structure, an inner sac of the intromittent sac. The most frequent pattern of occurrence of spikes or spiny bulbs was 1-1 (one at each side of the urethra), an ancestral character state in caviomorphs. Variation in bacular dimensions was limited and differences among species were small, with the exception of C. pearsoni. This species showed a significantly short baculum with a wide base. Sperm and penial morphology suggests that C. talarum is the most plesiomorphic and C. yolandae the most derived species of this group. The pattern of geographic variation among these 13 species rejects the hypothesis of penis morphology contributing to reproductive isolation. Ctenomys pearsoni is the only species with some evidence of reproductive isolation resulting from penis morphology.
4

The inhibition of methicillin - resistant Staphylococcus aureus by essential oils isolated from leaves and fruits of Schinus areira depending on their chemical compositions

71%
Celaya L. S., Alabrudzinska M. H., Molina A. C., Viturro C. I., Moreno S.
Acta Biochimica Polonica
|
2014
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tom 61
|
nr 1
 Schinus areira L. is a native plant from South America used for centuries in traditional medicine. Here, we investigate the antimicrobial activity of four essential oils extracted from leaves and fruits of S. areira exhibiting different chemical profiles. The antibacterial activity against the human pathogenic bacteria Staphylococcus aureus susceptible as well as methicillin resistant strain was assessed by the broth microdilution assay. The results showed that the limonene-rich oil extracted from the leaves and fruits have potent antibacterial effect on S. aureus ATCC 25923, while the α-phellandrene-rich fruit oil having a lower content of limonene showed the lowest antibacterial efficacy. In this work, for the first time, we demonstrated the bactericidal activity of essential oils isolated from fruits and leaves of S. areira against susceptible and methicillin resistant S. aureus strains. All results point out the potential use of the S. areira oils as antimicrobial agents to be used, at least against Staphylococcal infections.
5

Winter circadian activity pattern of free-ranging coypus in the Parana River Delta, eastern Argentina

71%
Palomares F., Bo R., Beltran J. F., Villafane G., Moreno S.
Acta Theriologica
|
1994
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tom 39
|
nr 1
During August 1990, 3 male and 3 female coypus Myocastor coypus (Molina, 1782) were radiotracked for 42 24-h periods at the Delta of Paraná River, Argentina. Coypus were mainly nocturnal, with activity peaks around one hour after sunset and two hours before sunrise. Movement rate peaked between 02.00 and 04.00 o'clock. This pattern is similar to that observed in captive individuals and introduced feral popu­lations. Among 7 environmental factors (day period, temperature, wind, cloud cover, and presence or absence of moon, fog, and rain) only period of day and rainfall during daylight were found significantly related to coypu activity, but no environmental factor influenced coypu nocturnal rate of movement.
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