Survival Data for Lophuromy Stanleyi
Description
The data was based on to investigate the survival time of L. stanleyi amidst disappearing natural forest cover following a Capture-Mark-Release (CMR) procedure. The status variable was whether a rodent was recaptured or not [1=Recaptured, 0=Otherwise]. Survival for L. stanleyi were hypothesized to be affected by various factors including habitat type (1=Intact forest, 2=Regenerating forest, and 3=Depleted forest), mean monthly rainfall, breeding status at first capture {1=Not breeding, 2=Breeding], trapping year [1=First year of trapping, 2=Second year of trapping], weight (grams), Sex [0=Female, 1=Male ] and age structure at first capture [1=Juvenile, 2=Adult]. The CMR data were entered in excel, and then exported to STATA for analysis. It was then declared as survival data with time from the first animal encounter in trapping session one to the subsequent encounters in the subsequent trapping sessions as the “time variable”, “status” as the failure variable, and “1(one)” as the failure value.
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Steps to reproduce
3 habitats were selected subjectively from Mabira forest, Two permanent grids were set in each of the three habitats, A capture–mark–release exercise was conducted monthly from September 2018 to August 2019, 49 Sherman live traps were set in each of the six grids of the size of 70 × 70 m, each containing 7 parallel lines spaced 10 m apart, and 10 m between traps, each parallel line having 7 trapping stations. The trapping stations were marked using labeled bamboo poles and were identified using coordinates labeled A to G, and numbered 1 to 7. Trapping of animals was done using well-baited Sherman live traps. Traps were set for three consecutive nights on a monthly basis. All trap stations were inspected early in the morning on each day of trapping. Captured animals were gently removed from the traps into a cloth bag, and weighed using a Pesola balance. Species identification was done based on morphometric measurements and existing literature on rodent distribution. The species identified were further confirmed by DNA analysis. Time from the first animal encounter in trapping session one to the subsequent encounters in the subsequent trapping sessions (in months) is the outcome variable for survival analysis.
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Funding
African Centre of Excellence for Innovative Rodent Pest Management and Biosensor Technology Development, Morogoro, Tanzania.