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Articles by S.Y. Oh
Total Records ( 3 ) for S.Y. Oh
  A. Arshad , S.M. Nurul Amin , G.T. Yu , S.Y. Oh , J.S. Bujang and M.A. Ghaffar
  The population structure, length-weight and length-length relationships of Acetes vulgaris were examined based on 1141 specimens collected in the months of June and July 2006 from Pontian, Johor Bahru. The morphological characteristics of A. vulgaris were examined and the result was found to be similar when compared with the previous research. Mean length of males was 23.18 ± 2.95 mm while for females was 23.91 ± 3.53 mm. The range of total length for the males and females was 14.00-33.00 and 13.00-32.00 mm, respectively. The relationship between the total length and body weight of A. vulgaris was W = 0.0178L2.6368 (r2 = 0.829) for males and W = 0.0082L2.9144 (r2 = 0.902) for females. The carapace length and total length, relationship for males and females were CL = 4.1844TL + 2.3983 (r2 = 0.732) and CL = 4.0872TL + 1.8879 (r2 = 0.732), respectively. The sex ratio of female to male was found to be at 1: 3.27 with the number of males exceeded that of the females.
  S.Y. Oh , A. Arshad , S.P. Pang and S.M. Nurul Amin
  Catch composition of Estuarine Set Bag Net (ESBN) in coastal waters of Pontian, Johor, Peninsular Malaysia was investigated based on the catch data during June to November 2007. The total catches comprised of three major groups were Acetes shrimps (89%), juvenile fishes (9%) and other shrimps (2%). Among the Acetes shrimps, three species were recorded from the study area viz., Acetes indicus (74%), Acetes serrulatus (24%) and Acetes japonicus (2%). The nine juvenile fishes species were identified as Setipinna brevicep, Trichiurus lepturus (ribbon fish), Lutjanus malabaricus, Epinephelus diacanthus, Cynoglossus bilineatus, Secutor ruconius, Lactarius lactarius, Atelopus japonicus and Ilisha kampeni. Other shrimps were constituted of two families as Penaeidae (70%) and Thalassocaridae (30%). This study revealed that there is no bad impact of ESBN on juvenile fishes.
  S.Y. Oh , A. Arshad , S.B. Japar , A.A Nor Azwady and S.M.N. Amin
  Shrimps of the genus Acetes Milne-Edwards, 1980 are ecologically and commercially important. The diet composition of A. serrulatus were examined based on 370 specimens collected in the coastal waters of Johor, Peninsular Malaysia from April 2008 to April 2009. The food items in the gut of A. serrulatus were comprised of phytoplankton, zooplankton, plant matter, appendages of decapods, debris and unidentified fragments. Majority of the stomach sacs examined (88.72%) were filled up with food while only 11.28% were found empty. Based on the Simple Resultant Index (% Rs), appendages of decapod (31.87%) was found to be the primary food items, followed by plant matter (16.48%) and zooplankton (14.18%). Thus, it could be concluded that A. serrulatus is omnivorous and feed on phytoplankton, zooplankton and microcrustacean.
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