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Estimating population density of the moles Scalopus aquaticus using assessment lines

100%

Hartman G. D., Krenz J. D.

Acta Theriologica

1993

tom 38

nr 3

Density was estimated for three populations of eastern moles Scalopus aquaticus Linnaeus, 1758, in South Carolina using a trapping grid and assessment lines. Assessment line data were based upon the repair of holes punched into surface tunnels of the animals. Using a new method of analysis for assessment line data, a logistic curve was fitted to the data. Density estimates based upon these analyses were (95% confidence intervals in parentheses) 3.02 (1.90 - 4.98), 2.73 (1.48 - 12.52), and 1.71 (0.86 - 2.69) moles/ha. In previous studies using assessment line data to estimate density, obtaining confidence intervals for the density estimate presented theoretical problems. In this study, Monte Carlo procedures were used to obtain an estimate of the approximate 95% confidence intervals for density. The analytical methods used in the present study eliminate the concepts of boundary strip width (strict sense) and the occurrence of distinctive zones with constant capture probabilities, and as such, represent important conceptual improvements of the assessment line density estimation method.

Zaklinacz dżdżownic

84%

Catania K.

Świat Nauki

2010

nr 04

Ograniczanie wyników

1 Acta Theriologica

1 Świat Nauki

1 Catania K.

1 Hartman G. D.

1 Krenz J. D.

1 2010

1 1993

Wyniki wyszukiwania

Estimating population density of the moles Scalopus aquaticus using assessment lines

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