This data set consists of counts of anuran larvae as a function of pond
type, pond perimeter, and presence of water scorpions (*Ranatra* sp.).

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A data frame with 24 observations on the following 6 variables.

`Type`

pond type, denotes the location of ponds in either bog or upland environment

`Num_anura`

number of anuran larvae in minnow traps

`Effort`

number of trap nights (i.e., number of traps x days of trapping) in each pond

`Perimeter`

pond perimeter in meters

`Num_ranatra`

number of water scorpions trapped in minnow traps

`log.Perimeter`

natural log of perimeter

Mazerolle (2006) uses this data set to illustrate model selection for Poisson regression with low overdispersion.

Mazerolle, M. J. (2006) Improving data analysis in herpetology: using
Akaike's Information Criterion (AIC) to assess the strength of
biological hypotheses. *Amphibia-Reptilia* **27**, 169–180.

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