Tort

Matrix Projection Model for the desert tortoise Gopherus agassizii 
with medium fecundity. The matrix is based on a population in the Western 
Mojave desert. Stages are based on age and size 
(carapace length in mm): 
Stage 1: Yearling (age 0-1) 
Stage 2: Juvenile 1 (&lt;60 mm) 
Stage 3: Juvenile 2 (90-99mm) 
Stage 4: Immature 1 (100-139mm) 
Stage 5: Immature 2 (140-179mm) 
Stage 6: Subadult (180-207mm) 
Stage 7: Adult 1 (208-239mm) 
Stage 8: Adult 2 (&gt;240mm).

datasets

Tools for modelling populations and demography using matrix projection models,
with deterministic and stochastic model implementations. Includes population projection,
indices of short- and long-term population size and growth, perturbation analysis,
convergence to stability or stationarity, and diagnostic and manipulation tools.

Iain Stott

popdemo

Demographic Modelling Using Projection Matrices

Dave Hodgson

Stuart Townley

Stephen Ellner

Tort function

Object of class <code>matrix</code>

Format

Matrix Projection Model for the desert tortoise Gopherus agassizii 
with medium fecundity. The matrix is based on a population in the Western 
Mojave desert. Stages are based on age and size 
(carapace length in mm): 
Stage 1: Yearling (age 0-1) 
Stage 2: Juvenile 1 (&lt;60 mm) 
Stage 3: Juvenile 2 (90-99mm) 
Stage 4: Immature 1 (100-139mm) 
Stage 5: Immature 2 (140-179mm) 
Stage 6: Subadult (180-207mm) 
Stage 7: Adult 1 (208-239mm) 
Stage 8: Adult 2 (&gt;240mm).

Tort: Desert tortoise matrix

Description

Usage

Arguments

Format

References

Examples