strandCet: R package for estimating natural and non-natural mortality-at-age of cetaceans from age-structured strandings.

摘要: Mortality is one of the most important parameters for study population dynamics. One main sources information to calculate mortality cetaceans arises from observed age-structure stranded animals. A method based on an adaptation a Heligman-Pollard model proposed. freely accessible package functions (strandCet) has been created apply this in statistical software R. Total, natural, and anthropogenic mortality-at-age estimated using only data whose age known. Bayesian melding estimation with Incremental Mixture Importance Sampling used fitting model. This characteristic, which accounts uncertainty, further eases credible intervals. The also includes perform life tables, Siler models total Leslie matrices derive projections. Estimated mortalities can be tested under different scenarios. Population as growth, net production or generation time derived strandCet R provides new analytical framework assess cetacean populations explore consequences management decisions stranding-derived data.