Browsing by Author "Amirrudin Ahmad"

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    Biological diversity of freshwater fishes in small streams in Peninsular Malaysia
    (Scotland : University of St Andrews, 2011-11) Amirrudin Ahmad
    Peninsular Malaysia has a diverse flora andfauna, much of which is yet to be documented. The freshwater fishes are one important group that have received little attention. Accordingly, the overarching goal of my study is to investigate the pattern of species richness and analyse the community composition and assemblage structure of fishes in the small streams in Peninsular Malaysia.
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    Diversity and conservation status of small mammals in Kelantan, Malaysia
    (Songklanakarin Journal of Science and Technology, 2015-10-27) Jayaraj Vijaya Kumaran; Faisal Ali Anwarali Khan; Isham Azhar; Ean WeeChen; Mohd Rohanif Mohd Ali; Amirrudin Ahmad; Azrinaaini Mohd Yusoff
    There is little information and research on the diversity of the small mammals in Kelantan. Thus, a series of wildlife surveys were done at five localities in Kelantan to further elucidate the diversity of small mammals in this state. There were 39 species of small mammals recorded, 13 of these are new records for Kelantan. This significantly increased the known diversity of small mammals from 71 to 84 species. However, the diversity of small mammals in Kelantan is still underrepresented and further surveys are needed to add more information to the current knowledge
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    Width-Weight And Length-Weight Relationships Of The Tri-Spine Horseshoe Crab, Tachypleus Tridentatus (Leach 1819) From Two Populations In Sabah, Malaysia: Implications For Population Management
    (Journal of Sustainability Science and Management, 2016-06) Faridah Mohamad; Azwarfarid Manca; Amirrudin Ahmad; Muhd Fawwaz Afham Mohd Sofa; Amirul Asyraf Alia’m; Noraznawati Ismail
    A morphometry study of 259 individuals of Tri-spine horseshoe crab Tachypleus tridentatus was carried out from April to October 2014 in two populations in Sabah, Malaysia, one in Tanjung Limau and another in Inderasabah. Two methods were used, i.e. visual search and gill netting. Both sites showed a higher number of males with 1.01:1 OSR (χ²=0.005, df=1, P>0.05) in Tanjung Limau, and 2.42:1 OSR (χ²=19.55, df=1, P<0.05) in Inderasabah. T. tridentatus collected from Tanjung Limau are larger than the population from Inderasabah. The prosomal width (PW) frequency for males ranged from 30-31 cm and 26-27 cm whereas for females ranged from 38-39 cm and 30-31 cm in Tanjung Limau and Inderasabah respectively. The prosomal width-weight relationship were W=0.0028 PW3.9273 and W=0.0125 PW3.5245, while the total lengthweight relationship are W=0.0152 TL2.8465 and W=0.0202 TL2.7536 for Tanjung Limau and Inderasabah respectively. Two-way ANCOVA revealed a significant difference among PW-weight relationship in males and females in these two locations (F=4.74, df=1, P<0.05). It confirms that both populations demonstrate allometric growth (b≠3) with a higher increment of PW-weight as compared to TL-weight, which agrees with previous studies that reported similar traits. The differences in these morphometric parameters in both populations of T. tridentatus in this study suggest that they may derive from two discrete populations. The findings of this study are useful to estimate the size of adults and spawning individuals of T. tridentatus for better management of the population of this unique animal.