Kajian umur, pembiakan, pertumbuhan, dan saiz kawasan rayau tikus mondok (rattus norvegicus) di sekitar Pulau Pinang
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Date
2008-11
Authors
Zul-Halim, Faizul Nizam Bin
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Abstract
Various aspects of population ecology of Norway Rat (Rattus norvegicus) was
carried out at four different locations of market areas in Batu Lanchang, Taman
Tun Sardon, Bayan Lepas and Chowrasta for eight months from 21st May 2004
to 25th June 2005. The Capture, mark, release and recapture method was used
to estimate the population size, density, home range, sex ratio, age structure and
average weight of the animals at the study locations. By using the Jolly-Seber
method, population densities for Pasar Batu Lanchang, Taman Tun Sardon,
Bayan Lepas and Chowrasta were 19, 27, 101 and 115 individuals/ha
respectively. The sex ratio between males and females in Jelutong is (1 :3.5),
Taman Tun Sardon (1 :2.2), Bayan Lepas (1: 2.5) and Chowrasta (1 :0.6).
ANOVA analysis showed that regressions for male and female body weight were
significantly different for each site. Regression between male body weight and
body length for each location was significantly different at P < 0.05 and similarly
for females at P < 0.05. Reproductive study was conducted in Chowrasta and
Lebuh Buckingham. Sixty males and 46 females were caught in these two
locations. There is a different in embryo's number between field's females and
laboratory's females which prove by ANOVA. The animals breed throughout the
year depends on the females autopsy. ANOVA found that regression between
the length and the weight of testicles during maturity was significant at P < 0.05.
The regression between age and weight of dry lens were significant too at P <
xviii
0.05 by using the statistical analysis. R. norvegicus really active at two different
periods, starting at 1700 untii 2200 hours and 2200 until 0100 hours. ManWhitney
U-Test found that active period for males are significantly longer and
higher compare to females. Minimum Convex Polygon 50%, 95%,100% and
Harmonic Mean 50%, 95% had been used to study the homerange and core
area of each collared individual and individual -34 had the largest homerange
53352.00 m2 (MCP 95%) and core area size 11950.00 m2 (HM 50%).
Description
Keywords
Pembiakan, pertumbuhan , Saiz kawasan rayau , Tikus mondok (rattus norvegicus)