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ASEAN Journal on Science and Technology for Development

ajstd
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Published by Universitas Gadjah Mada

ISSN : 22249028 EISSN : 22249028 DOI : -

Core Subject : Science, Education, Engineering,

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Mathematics

The coverage is focused on, but not limited to, the main areas of activity of ASEAN COST, namely: Biotechnology, Non-Conventional Energy Research, Materials Science and Technology, Marine Sciences, Meteorology and Geophysics, Food Science and Technology, Microelectronics and Information Technology, Space Applications, and Science and Technology Policy, Infrastructure and Resources Development.

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Articles 477 Documents

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Fouling Polychaetes in Tanjung Priok Port of Jakarta, Indonesia Hadiyanto Hadiyanto
ASEAN Journal on Science and Technology for Development Vol. 35 No. 1-2 (2018): Extent of transfer of alien invasive organisms in South/Southeast Asia regio
Publisher : Universitas Gadjah Mada

Fouling polychaetes in Tanjung Priok Port, Jakarta and their status were studied in order to update the list of marine alien species in Indonesia. Polychaetes were collected using six PVC panels that were submerged at a depth of 0.5 m over three months in Jakarta Bay. Polychaetes were identified to the lowest taxon possible based on characteristics of external morphology. The geographical distribution of identified polychaetes was then determined based on taxonomic literature in order to justify whether they were native or alien species for Indonesian waters. Twelve fouling polychaetes belonging to nine families are reported here. Of these, nine species (i.e., Chrysopetalum debilis, Eunice hirschi, Ceratonereis mirabilis, Leonnates decipiens, Polyophthalmus pictus, Eulalia (Eumida) sanguinea, Lepidonotus tenuisetosus, Hydroides elegans, and Polydora ciliata) were native species, while three other taxa (i.e., Namanereis sp., Hypsicomus sp. 1, and Hypsicomus sp. 2) were undetermined.

Composition of Ballast Water from Ships Arriving at Kertih Port, Malaysia with Observations on Port and Offshore Waters, and Notes on Settlement Patterns of Fouling Organisms Lee Siang Hing; Kesaven Bhubalan; Peck Ying Tan; Rohaida Mat Husain
ASEAN Journal on Science and Technology for Development Vol. 35 No. 1-2 (2018): Extent of transfer of alien invasive organisms in South/Southeast Asia regio
Publisher : Universitas Gadjah Mada

We investigated plankton composition and water quality of ballast water from seven international ships docked at Kertih Port, Malaysia. Coscinodiscophyceae and cyanobacteria were the dominant phytoplankton found in ballast water samples, whereas copepod nauplii, Oithona sp., Microstella sp. and Paracalanus sp. were the dominant zooplankton. The densities for both phytoplankton and zooplankton in ships’ ballast and port waters were higher than those of offshore samples. All water quality parameters (except Cr) of port samples were within the safety levels prescribed for ports, oil and gas fields (Class 3) by the Malaysia Marine Water Quality Criteria Standard. The study of fouling organisms using PVC panels revealed that brown algae covered 87–95% of the panels’ surface area but they were subsequently succeeded by barnacles, bivalves and red encrusting algae. Barnacle recruitment, however, was greatly influenced by crab predation which left behind a high percentage cover of barnacle bases as calcareous deposits on panels.

Marine Fouling Panel Survey and Assessment of Marine Alien Invasive Species in Myanmar Myint Myint Khaing
ASEAN Journal on Science and Technology for Development Vol. 35 No. 1-2 (2018): Extent of transfer of alien invasive organisms in South/Southeast Asia regio
Publisher : Universitas Gadjah Mada

A survey on fouling using PVC panels was carried out for a period of one year in Yangon River. Additional observations on fouling of man-made structures elsewhere in Myanmar were also made in an effort to find marine alien invasive species. The Myanmar ports at Yangon, Sittway and Myeik have a long history of overseas trading with Europe since the 17th century. In addition, though the Yangon port and jetties are located upstream some 12 miles from the mouth of Yangon River, it experiences regular tidal action with seasonal brackish water conditions. Its catchment area is only 100 miles from the mouth and hence the river and its tributaries are short and small. Moreover, there are several weirs and small dams on the tributaries, which result in reduced sediment influx at the mouth and thus less turbidity. Therefore, the physiochemical conditions at Yangon port may not pose a limitation on the distribution of nuisance species that are able to survive brackish water conditions. Elsewhere, Sittway port at the mouth of the Kispanadi River also experiences regular tidal action and is directly connected to the Bay of Bengal, conditions which are favourable for the intrusion of marine nuisance species. Myeik port is located along the open shore of the Myeik, which is located near the Myeik Archipelago. The waters around the archipelago are clear and the shelf is characterized by high biodiversity. Therefore, the environment also appears to be highly favourable for alien invasive species. However, these ports have no record of the occurrence of alien invasive species in particular the Caribbean bivalve Mytilopsis sallei.

Phytoplankton and Bacterial Communities in South Harbour, Manila Bay, Philippines Rhodora V Azanza; Nero M Austero; Jenelle Clarisse R. Dungca; Frenchly Joyce O. Caspe; Lidita Khandeparker
ASEAN Journal on Science and Technology for Development Vol. 35 No. 1-2 (2018): Extent of transfer of alien invasive organisms in South/Southeast Asia regio
Publisher : Universitas Gadjah Mada

In line with the ASEAN-India project “Extent of Transfer of Alien Invasive Organisms in South/Southeast Asia via Shipping”, phytoplankton and bacterial communities in the waters off South Harbour, Manila Bay were investigated. Sampling was done in July and August 2012 and in April and May 2013. A total of 67 phytoplankton species including 29 diatoms and 38 dinoflagellates were identified. Potentially toxic Pseudo-nitzschia spp. were among the diatoms found as well as dinoflagellates Alexandrium spp., and Gymnodinium spp. The diatom Skeletonema costatum appeared to be the dominant species in July and August 2012, whereas Chaetoceros spp. constituted over 85% of the total phytoplankton assemblage in April and May 2013. Mean bacterialabundance ranged from 9.53 x 102–3.18 x 105 cells/mL in July 2012. In addition, 93 bacterial isolates were identified using 16S rDNA, several of which belonged to the following phyla: Actinobacteria, Bacteriodetes, Firmicutes, and Proteobacteria; whereas, others were determined as uncultured bacterial clones. These results will serve as a valuable baseline for future studies on phytoplankton and bacterial community structure in Manila Bay.

Marine Biofouling Communities of Manila South Harbor, Philippines Hildie M.E. Nacorda; Nero M. Austero; Cesar R. Pagdilao; Koh Siang Tan; Rhodora V. Azanza
ASEAN Journal on Science and Technology for Development Vol. 35 No. 1-2 (2018): Extent of transfer of alien invasive organisms in South/Southeast Asia regio
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29037/ajstd.481

An immersion experiment was conducted in the Manila South Harbor to document the development of sessile biofouling communities. Test panels were submerged below the sea surface in April 2012 for short- (one and three months) and long-term (one year) exposures in seawater, then foauling types and occurrences were scored based on digital images of panel surfaces. The short-term immersed panels were found with significant cover of soft fouling (undet.), slime, and the invasive Balanus (=Amphibalanus) amphitrite. These also filled the long-term immersed panels, although some fell off due to mortality from crude oil smothering. Perna viridis, native but also invasive, successfully established and then dominated the fouling cover by the 12th month (April 2013). Oysters, bryozoans (Watersipora sp.), colonial tunicates, polychaetes (Hydroides sp.), and green algae contributed minor to fouling cover. These fouling communities in the Manila South Harbor consisted of organisms that were cosmopolitan in port waters of SE Asia. A similar study must be carried out in other major ports of the country and then compared.

Challenges in Managing Marine Bio-invasions via Shipping in Singapore Lim Chin Sing; Koh Siang Tan
ASEAN Journal on Science and Technology for Development Vol. 35 No. 1-2 (2018): Extent of transfer of alien invasive organisms in South/Southeast Asia regio
Publisher : Universitas Gadjah Mada

The economic, social and environmental impacts arising from the transfer and establishment of non indigenous marine species (NIMS) mediated through ship hull biofouling and ballast water discharges in the coastal marine environment require a regional approach to manage bio-invasions. As the coordinating body for maritime shipping affairs and protection of the marine environment, the International Maritime Organization (IMO) has been working with member states to adopt and ratify global conventions aimed at preventing invasive species transfer through shipping. As a major shipping hub and port-of-call in Southeast Asia, Singapore faces multiple challenges in managing marine bio-invasions including managing the transit of high risk vessels to environmentally sensitive areas beyond national borders. In this article, global frameworks for managing bio-invasions and its challenges for marine invasive pest management are discussed.

The invasive Caribbean Mytilopsis sallei (Bivalvia: Dreissenidae): A short review Koh Siang Tan; Teresa Tay
ASEAN Journal on Science and Technology for Development Vol. 35 No. 1-2 (2018): Extent of transfer of alien invasive organisms in South/Southeast Asia regio
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29037/ajstd.483

The mussel-like bivalve species from the Caribbean, Mytilopsis sallei, is now well established in the vicinities of several ports in South and Southeast Asia. Although it may not be as notorious as its relative the zebra mussel Dreissena polymorpha, this brackish-water bivalve has the ability to colonise and displace native species in intertidal and subtidal habitats. It is also another testament to how well a tropical species can travel beyond its natural biogeographical boundaries. Here we briefly review its taxonomy, morphology, growth and reproduction, habitat and distribution, as well as its impact on natural habitats after invasion, based on published literature.

Survey of Marine Phytoplankton in Ship’s Ballast Tanks at Laem Chabang International Port, Thailand Sumana Kajonwattanakul; Waranya Numnual; Thanyapas Sirichaiseth; Tanet Wannarangsri
ASEAN Journal on Science and Technology for Development Vol. 35 No. 1-2 (2018): Extent of transfer of alien invasive organisms in South/Southeast Asia regio
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29037/ajstd.484

Marine phytoplankton was investigated in ballast water of ships from 2010 to 2012 with a collection of 30 marine vessels that docked at Laem Chabang International Port in Chonburi Province, Thailand. The results showed that the dominant group of phytoplankton was diatoms. The amount of phytoplankton in the ballast tanks averaged less than 10 cells/ mL, which is less than Regulation D-2 of the Ballast Water Management Convention which requires that marine organisms between the sizes of 10 ? X <50 µm should be less than 10 cells/mL and size ? 50 µm should be less than 10 cell/m3 in ballast water. Alien species of phytoplankton was not recorded in this survey.

Survey of Fouling Organisms at Songkhla Port in Thailand Ratchanee Phuttapreecha; Sumana Kajonwattanakul; Phatcharin Songkai; Chaovadee Choamanee
ASEAN Journal on Science and Technology for Development Vol. 35 No. 1-2 (2018): Extent of transfer of alien invasive organisms in South/Southeast Asia regio
Publisher : Universitas Gadjah Mada

The fouling organisms at Songkhla Port were investigated from November 2011 to December 2012. Samples were collected using PVC panels (10 cm x 20 cm) submerged for one-month and three-month periods. Analysis of fouling panels was carried out using PhotoGrid software. In addition to slime and silt, three types of fouling organisms, namely encrusting bryozoa, barnacles and calcareous polychaetes, were observed on the submerged PVC panels. Calcareous polychaetes and molluscs were the most diverse groups (ten species) on panels that were submerged for one-month and three-month periods. Barnacles (Balanus spp.) were most abundant on panels submerged for three-month periods, while calcareous polychaetes dominated one-month panels. The dominant species of mollusc was the mussel Brachidontes sp. The major polychaetes identified were Ficopomatus macrodon, F. enigmaticus and Hydroides norvegicus. A highlight of this study was the first record of the Caribbean tubeworm Hydroides sanctaecrucis in Thailand, which has previously invaded and established in Australian waters through hull fouling.

Simulation of Ballast Water Dispersion in the Gulf of Tonkin and Offshore Waters of Hai Phong Port, Vietnam Hoang Mai Le; Cong Minh Nguyen; Thanh Ca Vu; Thanh Thuy Tran; Van Dien Nguyen; Huy Ram Dang
ASEAN Journal on Science and Technology for Development Vol. 35 No. 1-2 (2018): Extent of transfer of alien invasive organisms in South/Southeast Asia regio
Publisher : Universitas Gadjah Mada

Transfer of invasive alien organisms and their negative impacts have been recorded around the world. It is estimated that approximately 7,000 species of marine creatures are silently moved around the world by ballast water every hour. Recently, discharge of ballast water in the coastal area has become a serious concern. The movement of discharged ballast water and accompanying alien organisms largely depends on the preveiling hydrodynamics of the receiving water body. Dynamics simulation models for marine environment provide sound prediction of dispersion of ballast water. The study was undertaken in the seas of the Gulf of Tonkin and in the offshore area of Hai Phong Port using the MIKE 21 model – a two-dimensional hydrodynamics model. The yearly-mean wind field was used in the model to generate the circulation. Ballast water discharged to the three sites in the study area was simulated by using dispersal-advection model. The outputs showed that ballast water discharged near the coast tends to move along the coastline. Ballast water discharged at 200 NM seaward from the coast is still able to influence the coastal zone of Vietnam.

Page 39 of 48 | Total Record : 477

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