Population studies of the Malaysian wood rat (Rattus tiomanicus Miller) in a cocoa-coconut plantation
The estimated population of Rattus tiomanicus in cocoa-coconut plantation presumably in a stable condition varied between 151 and 216 animals/ha (extrapolated from population estimates of 0.74-hectare). The rats were believed to be trap prone, and thus the population size was probably an underestimate. Survival rates between trapping intervals were high (0.5-1.0). Recruitment was mostly via birth and equally divided among sexes. The proportion of potential breeders was comparatively high (65 per cent-100 per cent) as was the proportion of pregnant and lactating females. A total of 1086 males and 741 females were tagget throughout the study. The mean growth rate of the population varied between their values 0.2655 and -0.3643 (except for week 63 after field was accidently poisoned.)
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| Format: | biblioteca |
| Language: | eng |
| Published: |
Selangor (Malasia): Malaysian Agricultural Research and Development Institute,
1986
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| Subjects: | ROEDORES, CULTIVO INTERCALADO, THEOBROMA CACAO, INSECTOS DAÑINOS DE LA RAIZ, DINAMICA DE POBLACIONES, MALASIA, |
| Online Access: | http://jtafs.mardi.gov.my/index.php/publication/issues/archive/128-1986/volume-14-no1/1073-140115 |
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| Summary: | The estimated population of Rattus tiomanicus in cocoa-coconut plantation presumably in a stable condition varied between 151 and 216 animals/ha (extrapolated from population estimates of 0.74-hectare). The rats were believed to be trap prone, and thus the population size was probably an underestimate. Survival rates between trapping intervals were high (0.5-1.0). Recruitment was mostly via birth and equally divided among sexes. The proportion of potential breeders was comparatively high (65 per cent-100 per cent) as was the proportion of pregnant and lactating females. A total of 1086 males and 741 females were tagget throughout the study. The mean growth rate of the population varied between their values 0.2655 and -0.3643 (except for week 63 after field was accidently poisoned.) |
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