The effect of pre-baiting on captures of rodents

Babińska, Joanna; Bock, Ewa

doi:10.4098/at.arch.69-20

Cited by 11 publications

(7 citation statements)

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“…2. Then the inhibition of reproduction occurred being associated with the increased mortality, and in July only 14.5°/o of females were reproducing while the density decreased to 65.4 rodents per ha (Babińska & Bock, 1969). In October the number of rodents was reduced to 34.5/ha, and in late spring of the next year it reached barely 5.5 individuals/ha.…”

Section: Dynamics Of Rodent Numbersmentioning

confidence: 97%

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Net production of small rodents in deciduous forest

Bobek¹

1973

Acta Theriol.

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In deciduous stands (Tilio-Carpinetum) of the Niepolomicka Forest (Southern Poland) the numbers of rodents were estimated during four consecutive years by means of prebaiting and intensive removal method. Bank voles (Clethrionomys glareolus) and yellow-necked field mice (Apodemus flavicollis) constituted 92.5°/o of all rodents in this forest. Small rodents went in this period through a population cycle from a high density (32.1 vole and 5.9 mice per ha during the year on the average) to a low density (8.1 and 2.0 individuals, respectively). The mean number for the four year cycle amounts to 19.0 rodents/ha. When young animals staying in the nests are also taken into account the mean numbers should be increased by approximately 20%. The age of mice and voles was determined and then life tables were constructed and curves of individual growth were drawn. At high population density the mean life span of voles amounts to 2.2 and mice to 2.4 months, while at low density the corresponding figures are 2.6 and 3.3 months. The rate of body weight increase was lower in the year of mass occurrence. The turnover of individuals was also related to density and in the population of voles it ranged from 5.5 to 4.6 per year, while in the population of mice -from 5.0 to 4.0 per year. The turnover of biomass amounted on the average to 3.6/year in both populations. The number of rodents born during the year was estimated and the net production was computed from the curves of their growth and survival. In consecutive years the net production ranged from 755 to 2691 g/ha year, out of this 562 to 1977 g/ha year falling for voles and 177-755 g/ha year for mice. The mean year production of all rodents amounted to 1360 g, which corresponds to 1983 kcal/ha year. The net production of rodents was compared in a dozen or so forest and grassland ecosystems. A logarithmic describing the relationship between the production of a population and its mean year density was calculated on the example of voles population.

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Section: Dynamics Of Rodent Numbersmentioning

confidence: 97%

“…6. Seasonal changes of the mean body weight in the populations of bank voles (1, 2) and field mice (3,4) in the years of low density. Continuous lines concern trappable individuals, and broken ones -the whole population, i.e.…”

Section: Month Of Generation Birthmentioning

confidence: 99%

Net production of small rodents in deciduous forest

Bobek¹

1973

Acta Theriol.

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“…(Grodziński et al, 1966). Prebaiting serves to reduce the bias due to variable probability of capture and tends to increase the removal rate (Babińska & Bock, 1969), at least during the first days of removal. Prebaiting is essential if the linear regression method (H a y n e, 1949) is used to estimate small mammal numbers (Grodziński et al, 1969).…”

Section: Removal Ratesmentioning

confidence: 99%

Yearly fluctuations in small mammal populations in a southern United States hardwood forest

Gentry¹,

Golley²,

Smith³

1971

Acta Theriol.

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“…Some of the animals living on the periphery of the grid must have the same P c as the residents. If the peripheral animals continued to distribute their activity on and off the grid their P c should be lower than that of the residents; prebaiting must shift the focal points of activity for these animals onto the grid (Babińska & Bock, 1969). Thus even if the data fit Hayne's regression model, the estimate will be higher than the number of animals present prior to prebaiting.…”

Section: Discussionmentioning

confidence: 96%