Reproductive characteristics of free-livingCalomys venustus (Rodentia, Muridae)

Polop, Jaime; Provensal, M. Cecilia; Dauría, Pascual

doi:10.1007/bf03192631

Cited by 9 publications

(14 citation statements)

References 16 publications

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“…Regarding the susceptible class (X) and in agreement with the results shown by Polop (1996), Polop et al (2005) and Castillo (2007), we considered the following relationships ( Figure 1): cohort 1 (C1) is composed of animals born during September-December (spring and early summer), which gives birth to cohort 2 (C2) and cohort 3 (C3) animals; C2 is formed of animals born during January-March (summer) and gives birth to C3 animals; and C3 is formed of animals born during April-May (autumn). Cohort 0 (C0), or the overwintering cohort, corresponds to C2 and C3 to animals born in the previous breeding period that survived until the following period to produce the first litters (C1).…”

Section: Model Outline and Formsupporting

confidence: 89%

“…This dependence originates a ''cohort effect'', a phenomenon that occurs when the common conditions experienced by a group of individuals at time t generate differences in its future performance, which will be distinguishable from that of other groups (Beckerman et al 2002;Lindstrom and Kokko 2002). Several studies have assessed the role of different cohorts in population dynamics of small mammals (Wiger 1979;Zuleta et al 1988;Polop 1996;Provensal 2001;Nordahl and Korpimaki 2002;Polop et al 2005). Castillo (2007) found that C musculinus exhibits a marked variation in its population structure over a year, with cohorts that have different number of individuals and distinct values of both survival and fecundity.…”

Section: Introductionmentioning

confidence: 96%

“…However, cohort dynamics in C. musculinus populations have been little studied. On the contrary, a more extensively studied species is Calomys venustus (Thomas), which has similar life history characteristics to corn mouse (Polop 1996;Provensal 2001;Priotto and Polop 2003;Polop et al 2005;Gomez et al 2007). In C. venustus populations, onset of the breeding period is produced by the overwintering cohort (C0).…”

Section: Introductionmentioning

confidence: 96%

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Providing management options to control corn mouse (Calomys musculinus) reservoir populations using a cohort structured model

Piacenza

Gomez

Simone

et al. 2011

International Journal of Pest Management

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We evaluate several management options for Calomys musculinus populations through the formulation and validation of a cohort structured model. Initially, a basic model was constructed and validated using field population data. Next, the model was altered to allow us to evaluate different management options. In general, basic model results were in agreement with field data, demonstrating that this model would be useful in describing aspects of corn mouse population dynamics. Restricting control measures to when mouse numbers reach high levels would be inadequate, because population numbers tend to increase in size after some years. In contrast, reducing vegetation cover in spring was more effective in reducing field population abundances. Despite some limitations, the model could be useful for evaluating the relationships between population dynamics and some biotic or physical environmental variables, and thus ensure more efficient use of resources in integrated pest management.

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Section: Model Outline and Formsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 96%

See 1 more Smart Citation

Providing management options to control corn mouse (Calomys musculinus) reservoir populations using a cohort structured model

Piacenza

Gomez

Simone

et al. 2011

International Journal of Pest Management

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“…Populations of A.azarae and C. venustus show seasonal fluctuations in abundance, with a minimum in spring and a maximum in autumn (Zuletta et al 1988;Busch and Kravetz 1992;Castellarini and Polop 2002). Reproduction is also seasonal; the breeding season begins in spring (September-October) and finishes in autumn (April) (Mills et al 1992;Polop et al 2005). In bi-dimensional habitats, home range size of A. azarae is determined by sex and breeding period; even though male home ranges are always larger than those of females, this becomes more evident in the breeding period (Priotto and Steinmann 1999).…”

Section: Introductionmentioning

confidence: 97%

Movement distances of two species of sympatric rodents in linear habitats of Central Argentine agro-ecosystems

et al. 2011

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a b s t r a c tMovement patterns of Akodon azarae and Calomys venustus in linear habitats were studied in relation to sex, season and abundance. Movement distances were measured by seasonal capture-mark-recapture samples from November 2005 to August 2007 in field borders in agro-ecosystems of Central Argentina. Movement distances in A. azarae varied by season and sex. During the breeding period, movement distances of males were longer than those of females, meanwhile in non-breeding period movement distances became similar between sexes. The main effect of sex on movement distances is consistent with the promiscuous / polygynous mating system suggested for A. azarae. Abundance and sex were the most important factor affecting movement distances in C. venustus, males moved larger distances than females and the higher the abundance, the shorter the movement distances of individuals. The results of this study may have implications in the management of non-crop linear habitats in agriculture landscapes since the maintenance of field borders would be important to support rodent populations that are important food sources for birds and mammals.

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“…For example, dominant females, which are usually the oldest and often the mothers of younger subordinate females, breed while the younger females do not. The presence of the mother, a female sibling, or urine from other females is sufficient to delay growth and suppress reproduction in young females (Batzli et al 1977;Getz et al 1983;Carter et al 1986;Polop 1996;Polop et al 2005;Schadler 1990). …”

Section: Introductionmentioning

confidence: 99%

Effect of adults on juvenile reproduction ofCalomys venustus(Muridae: Sigmodontinae)

2006

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We tested the hypothesis that adult overwintering Calomys venustus inhibit maturation and reproduction in young-of-the-year from the first cohort. The study was carried out in four 0.25-ha enclosures (two control and two experimental), each situated on natural pasture. This study was conducted between August 1997 and March 1999 and had two parts: removal of overwintering male (ROM) and removal of overwintering female (ROF). For the ROM treatment overwintering males were removed immediately after the first cohort of juveniles were born, in the ROF treatment overwintering females were removed after the first cohort were weaned.Weekly censuses were taken for three successive days over 6 weeks. The sexual maturation and reproductive condition of juveniles were compared between treatments (overwintering male or female removal) using repeated-measures anova. The repeated measures factor was the age of juveniles. Removal of overwintering males and females did not affect sexual maturation of juveniles, however, overwintering males influenced the onset of reproductive activity of juvenile females at the beginning of the breeding period.

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Reproductive characteristics of free-livingCalomys venustus (Rodentia, Muridae)

Cited by 9 publications

References 16 publications

Providing management options to control corn mouse (Calomys musculinus) reservoir populations using a cohort structured model

Providing management options to control corn mouse (Calomys musculinus) reservoir populations using a cohort structured model

Movement distances of two species of sympatric rodents in linear habitats of Central Argentine agro-ecosystems

Effect of adults on juvenile reproduction ofCalomys venustus(Muridae: Sigmodontinae)

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