Article Per Year (5 Year)
p-Index From 2021 - 2026
0
P-Index
This Author published in this journals
All Journal Proceedings of Annual International Conference Syiah Kuala University - Life Sciences & Engineering Chapter
Khairun Yahya
Unknown Affiliation
Engineering Other

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Benthic mollusc assemblages in subtidal coastal waters of Penang National Park, Malaysia Alianie Mustaffa; Omar Ahmad; Vararin Vongpanich; Anita Talib; Khairun Yahya
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 3, No 1 (2013): Life Sciences
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (141.896 KB)

Abstract

Benthic molluscs were sampled bimonthly from October 2010 to September 2011. Four sampling sites were selected (Teluk Bahang, Teluk Aling, Teluk Ketapang and Pantai Acheh) based on difference human activities in surrounding coastal waters of Penang National Park. Sampling activities were done starting at 200 m from the subtidal shoreline until 1200 m offshore. A total of 432 benthos samples were collected using 6’ X 6’ Ponar grab. From this study, 25 species from 21 families and 25 genera were identified. Particle size analysis was done and revealed Penang National Park coastal waters is a muddy area with more than 80% of the sediment samples diagnosed as mud. Whereas, in Teluk Bahang and Teluk Aling, the starting transects (200 m to 400 m) were consisted mixture of particle size but the proportion of particle size gradually changed to mud towards the shore. Based on Pearson’s Correlation, it was found that Nuculanidae, Megastomia sp., and Timoclea sp. showed positive correlations with sandy particles (1000 ;m-250 ;m) with r values ranging 0.88 to 0.96 at p0.01. The density of benthic molluscs was found highest in Teluk Bahang followed by Teluk Aling, Teluk Ketapang and Pantai Acheh with overall mean value 613.6 molluscs/m2. Penang National Park coastal waters are all considered shallow as the depth never exceeding 10 m.
The distribution and zonation of barnacles around intertidal shores of Penang Island Nurul H.H. Amir; Anita Talib; Omar Ahmad; Khairun Yahya
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 3, No 1 (2013): Life Sciences
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (159.696 KB)

Abstract

The intertidal shores around Penang Island were surveyed for the distribution of barnacles from 14th November 2011 to 31st January 2012. The sampling was done by using 20 cm x 20 cm transect to count the barnacles. Three replicates were taken for each zonation available of the intertidal areas; i.e. upper, middle, and lower zonations, at every sampling site. From the result, three species were identified, including Euraphia withersi and Chthamalus malayensis from Family Chthamalidae, and Balanus amphitrite amphitrite from Family Balanidae. Chthamalus malayensis was found to be most abundant among the three species with 44.24% of total population; and Tg. Tokong recorded the highest abundance of this species (28.22%). This was followed by Euraphia withersi with 38.77%; which was found to be densely populated at Gelugor (21.92%). Balanus amphitrite amphitritewas least abundant with only 16.99% and mostly found at Gurney Drive (26.24%).The distribution of the three species of barnacles also varied among the sampling locations. Gertak Sanggul recorded the highest relative abundance of all three species of barnacles at 18.01%; while the location with the least relative abundance of barnacles is Queensbay with 0.33%.Based on ‘Non-Supervised Artificial Neural Network’ (ANN), distinct zonation was observed where Chthamalus malayensis was more dominant on the upper zonation; Euraphia withersi on the middle zonation; and Balanus amphitrite amphitrite on the lower zonation. The interaction betweenbarnacles with other barnacles leads to competitive exclusion and niche partitioning which created zonations among the species. Interspecies interaction that brought by predation also played a part in the distribution of barnacles. Apart from that, the distribution was affected by the sampling sites and humanactivities; such as embankment, land reclamation, and residential development.
Co-Authors Alianie Mustaffa Anita Talib Anita Talib Nurul H.H. Amir Omar Ahmad Omar Ahmad Vararin Vongpanich