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Publications
Publications (80)
Heavy metal bioaccumulation in aquatic organisms of open water aquatic ecosystems was detected globally, including Bangladesh. This study evaluated the hypothesis of whether heavy metal contamination in aquatic habitats impacts fish growth and reproduction using wild Channa punctata as an experimental animal. The growth and reproductive health of a...
Mangrove forests serve as significant carbon sinks and play a crucial role in mitigating climate change. Currently, the response of mangroves to intensified climate change and human activities, and the factors that influence the magnitude of carbon storage in their sediments remain uncertain. To address these questions, two sediment cores were coll...
Background
Microplastic (MP) pollution is now a global critical issue and has been the subject of considerable worry for multiple various types of habitats, notably in lagoons which are coastal areas connected to the ocean. MPs are of concern, particularly because floating MP in surface water can be ingested by a number of marine organisms. There a...
Songkhla Lagoon has been studied for decades, but there is no clear evidence of its origin. As a barrier to the lagoon, the Satingpra Peninsula plays a crucial role in understanding its formation. Eleven sediment samples from sand ridges and tidal flats on the Satingpra Peninsular were collected and analysed for granulometry and geochronology. Both...
Mangrove forests can help to mitigate climate change by storing a significant amount of carbon (C) in soils. Planted mangrove forests have been established to combat anthropogenic threats posed by climate change. However, the efficiency of planted forests in terms of soil organic carbon (SOC) storage and dynamics relative to that of natural forests...
Microplastics are everywhere and may be harmful to the biota environment. This study investigated microfiber contamination in giant freshwater prawn tissues, one of Thailand’s economic species. The prawn samples were taken from the Trang River in southern Thailand in September 2022. Three tissue sections (head, middle, and tail) of 60 prawns were s...
Heavy metal and microplastic (MP) contamination of aquatic systems is a major environmental issue that affects human health globally. Songkhla lagoon, the largest lagoon in Thailand, also faced with the environmental issues. Here, this study reported the occurrence of heavy metal and MP in 10 sites of sediment in the Songkla lagoon. From the microp...
Bacterial contamination in water is an important cause of human health problems. Water-borne infections are among the top 10 reasons for illness in Thailand and accounted for 40 % of all infections necessitating surveillance. The purpose of this study was to identify environmental factors influencing bacterial contamination in water in the upper so...
Background
Anthropogenic waste, especially microplastics, is becoming more prevalent in the environment and marine ecosystems, where it has the potential to spread through food chains and be consumed by humans. Southeast Asian countries are home to giant freshwater prawns, a common freshwater species that is eaten around the world. Microplastic pol...
Microplastics are widespread in coastal and marine environments, and sediments serve as a sink for microplastics. In this study, four sediment cores were collected from the Kuala Gula Mangrove area. The abundance of microplastics in mangrove sediments ranged from 25–130 items/kg dry weight. The highest abundance of microplastic was observed at the...
Microplastics have been found to accumulate in freshwater, marine ecosystems, and biological organisms. The frequency of studies on microplastic contamination in organs has increased recently, although there have been relatively fewer investigations on fish eggs in Thailand. To extract microplastics from catfish samples for laboratory analysis (Ost...
Background
Microplastics (MPs) are pollutants in rivers and marine environments. Rivers can be sources and sinks of MPs that enter the biota. Previous studies focusing on freshwater species are quite limited, especially for gastropods. Freshwater gastropods are essential to aquatic ecosystems because they are food to other aquatic animals, such as...
Microplastic (MP) contamination in the marine environment has received growing attention. In 2022, the surface water of the U-Taphao River was sampled four times, in February, April, June, and August. The surface water samples were taken at seven different locations, ranging from upstream to downstream parts of the river. The results reveal that th...
Brunei Bay is a unique ecosystem which offers a vast biodiversity. This study was carried out to define the source of metals in the surface sediment of Brunei Bay to ensure the bay’s health. The secondary data were analysed using chemometrics analysis to verify the possible factors that influence metals distribution in Brunei Bay sediment. Samples...
The concentration and distribution of trace metals were determined in sediment cores from
the Khuan Khi Sian wetland, Thailand. The sediment cores were collected from seven stations in the
dry and wet seasons in 2022. The concentration of Pb, As, and Cd in the dry season were in the range
0.00–60.16, 0.00–6.68, and 0.00–0.92 mg/kg (dry weight), res...
Temporal changes in vertical land motion (VLM) in and around Phuket Island in southern Thailand following the great 2004 Sumatra–Andaman megathrust earthquake have impacted the relative sea-level change estimates based on tide-gauge (TG) records. To better monitor the VLM, two new continuous global navigation satellite system (GNSS) stations have b...
Brunei Bay is a unique ecosystem which offer a vast diversity of biology. The current study was carried out to trace the source of metals in the surface sediment of Brunei Bay as a control check on the bay’s ecosystem. The study has analyzed the secondary data using chemometrics analysis to verify and better understand the factors that influence me...
In February and March 2022, a large amount of pumice stone appeared along the shoreline of Thailand. Pumice is a type of extrusive volcanic rock, and since there are no volcanoes in the Gulf of Thailand, an interesting question was where the pumice stones originated from. Another question was whether the pumice could be a vehicle for microplastics...
The persistent presence of microplastics in the marine environment has become a major threat to many marine organisms and this issue continues with heavy metals pollution. Microplastics and heavy metals are commonly categorized in different type of pollutant group and the understanding of interlinkage between these two contaminants is less discover...
Mangroves are typically found in tropical coastal areas, and these ecosystems face deterioration and loss due to threats from climate and human factors. In this study, sediment cores were collected from human-planted mangroves in sub-tropical Ximen Island, China, and were determined for sedimentary phosphorus (P) species. The objective was to inves...
The reproductive biology of short mackerel, Rastrelliger brachysoma, which forms spawning aggregation off Pattani
Bay was measured by gonadosomatic index (GSI), size at first maturity (L50) and morphometric maturity classification. We
found an unbalanced sex ratio between males and females (1.60:1, p
This study assessed the feeding habits and ingestion of anthropogenic debris in 34 marine fish species from the southern Gulf of Thailand. A total of 5478 fish samples of 12 families were categorised into seven groups: planktivore, Lucifer feeder, fish feeder, Acetes feeder, shrimp feeder, piscivore, and zoobenthivore fish. A total of 2477 anthropo...
In this study, size capture determination of the anchovies in the Gulf of Thailand (GoT) and the Andaman
Sea showed length ranges of 6.00–9.90 cm and 3.50–12.00 cm and weight ranges of 2.23–8.00 g and 0.34–12.09 g,
respectively. The occurrence of microplastics (MPs) in anchovies were investigated by randomly sampling 100
individual anchovies (GoT =...
The African catfish Clarias gariepinus has been introduced for aquaculture in Bangladesh due to the scarcity of indigenous C. batrachus fingerlings. However, the government of Bangladesh has banned the farming of C. gariepinus due to the carnivorous nature of this species. Recently C. gariepinus has been reported by fish farmers and consumers in Ba...
This study aimed to assess diet characteristics and ingestion of microplastics (MPs) by short mackerel (Rastrelliger brachysoma) based on fish size, water, depth, and season. Samples of fish were collected monthly from three depth contours during February 2019 and February 2020 by mackerel gill nets in the mouth area of Pattani Bay, Thailand. Plank...
This study evaluates the impacts of mesh size of the net, fishing depth and season on the catches of target, non-target and discarded species for short mackerel Rastrelliger brachysoma gillnet fishery in the vicinity of Pattani Bay, Gulf of Thailand. The catches were examined for species composition, catch efficiency and size of catch. Samples were...
Mangroves are highly productive blue carbon ecosystems that preserve high organic carbon concentrations in soils. In this study, particle size, bulk elemental composition and stable carbon isotope were determined for the sediment cores collected from the landward and seaward sides of two mangrove forests of different ages (M1, ca. 60; M2, ca. 4 yea...
The study was conducted with an exploratory study design to explore the amount of debris around beaches on Libong Island, Thailand. Libong Island is one of the significant tourist attractions in Trang Province. The study was conducted by collecting samples from 4 areas during February, June, September and December 2020. The findings from the study...
In the oceans and coasts, plastic waste poses a global threat to biodiversity. This study examined the types and distribution of microplastics in beach sediment along the coast of the eastern Gulf of Thailand in March 2018 (northeast monsoon = dry season) and July 2018 (southwest monsoon = rainy season). Microplastic samples were collected from six...
The severe tropical Cyclone Yaas hit on 26 May 2021 in 16 coastal districts of Bangladesh and affected 1.30 million people. Moreover, the study areas are highly affected by the COVID-19 pandemic, which has increased the vulnerability of the people. Therefore, the objective of this study is to assess the impact of cyclone Yass aggravated by the COVI...
Understanding the contributions of participants from management practices and those from the local community to protected areas (PAs) as nature reserves, is crucial for forest protection and resource conservation. Thus, empirical studies have usually investigated whether patrolling has significantly improved forest protection action. Many previous...
Microplastics have been one of the major pollutants in the marine environment throughout the recent decade. At present, microplastic contamination in marine ecosystems of Thailand region has become an increasing environmental concern because the ingestion of microplastics in marine organisms may adversely influence the safety of seafood. Cockles an...
The present study determined the metal levels in surface sediment and in soft tissue of the Strombus canarium at Libong Island, Thailand, and estimated the possible risk from consuming the shellfish. The mean concentrations of the metals Fe, Cu, Co, Pb, Mn, and Ni in sediment were 2711.94 ± 1424.83, 0.47 ± 0.37, 0.11 ± 0.09, 1.32 ± 1.48, 40.41 ± 16...
Understanding trophic relationships of fish in estuarine ecosystem is an important element for sustainable resource management. This study examined the feeding habits of 29 dominant fish species, characterized the trophic guilds, assessed the impact of season and clarified the role of diets in structuring the fish community in the mouth region of P...
The study was carried out in the beginning of May, 2020 during the COVID-19 pandemic
lockdown period in Thailand. This study reported on the occurrence of microplastic debris in stomachs of fish (Arius maculatus) and shrimps (Parapenaeopsis hardwickii and Metapenaeus brevicornis) from Songkhla Lake. The average occurrences of microplastic pieces pe...
Metallic contamination in seafood, especially fish, has been of increasing concern to human health. Moreover, with increasing dependency on farmed fish for fish resources, the metallic contamination in them is still questionable. This study aimed to investigate the effects of cooking (steaming) on heavy metal concentration in farmed fish and to est...
This study determined the distribution and ontogenetic habitat shifts of Portunus pelagicus in coastal habitats in Thailand. Samples were collected by gill nets and traps, at six study sites during May 2013 and September 2014. It was found that, in the bay, the catches from both gears were significantly influenced by depth ( and ) but not by season...
Metals are natural elements existed in the environment. However, due to the rapid development of urbanisation and economic, high content of anthropogenic metals are being perceived in polluting the environment. The oceans are known to be a part of the sinking basin for anthropogenic metals ends. Dataset provided is purposely to give an overview of...
Heavy metals content in seafood, especially fish species has been of increasing concern to the human health. Nowadays, with increasing dependency towards farmed fish for sources of dietary protein and essential minerals, this heavy metals contamination in fishes are still questionable. This study aimed to investigate the accumulation of heavy metal...
Macro-tidal coral reefs are particularly sensitive to medium to long-term changes in sea-level. Vertical motions of the seabed contribute to both lower or higher relative sea-level changes, particularly in tectonic plate boundary deformation zones along active subduction trenches. Phuket Island in Southern Thailand is subject to both horizontal and...
Microplastics have been acknowledged as evolving marine contaminants of noteworthy apprehension, due to their ubiquity, persistence and toxic potentiality. It is very urgent and important to study about microplastic pollution not only in Thailand but also for the world because of its harmful effects on marine biota as well as for human health. The...
The feeding habits of two sympatric squid species, Uroteuthis (Photololigo) chinensis and Uroteuthis (Photololigo) duvaucelii from the southwestern Gulf of Thailand were studied. They fed on low numbers of food types (AF) and had a low diet breadth; 1.18 and 0.01 for U. (P.) chinensis and 1.49 and 0.05 for U. (P.) duvaucelii, respectively. Three ma...
Time series analysis techniques and Seasonal Autoregressive Integrated Moving Average (SARIMA) models were used to analyze monthly fish and shrimp catch landing trends recorded for Songkhla shallow lagoon in Thailand (2003-2016). Autocorrelation (AC) and Partial Autocorrelation (PAC) functions were calculated to build seasonal ARIMA models. These m...
Mangrove sediment and mangrove plant Soneratia caseolaris in Songkhla Lake, Thailand have been increasingly threatened by trace metal pollution. Mangroves receive trace metal pollution from upstream areas and the sea. However, little is known about the mangrove plant’s capacity to uptake and store trace metals. In this study, the concentrations of...
Length–weight relationships (LWR) were estimated for three main Songkhla Lagoon fish species occurring in the lower gulf of Thailand. Samples were collected monthly during monsoon and after monsoon season (September 2017 to April 2018). Fishes were captured by three methods: fishing gear, crab gear and shrimp gear. This study is the first reference...
Microplastics have turned into a key global environmental issue in the current decade because of their marine ubiquity, bioavailability and capability of carrying toxic chemicals. The study focuses, for the first time, on the existence of plastic debris in the stomach contents of some commercially important marine fishes caught from the lower Gulf...
– Small-scale fisheries are very important in the coastal areas as the main livelihood in Thailand. However, as many places in the world, the fishers are facing the decline of fish catch and worrying about their future. The study was conducted to obtain an understanding of fishing activity and fisher’s future perception in Songkhla Lagoon. The meth...
This study was carried out to assess the distribution pattern of two loliginid squid species; Uroteuthis (Photololigo) chinensis (Gray 1849) and Uroteuthis (Photololigo) duvaucelii (d’Orbigny 1835) at different depth contours along the lower part of the Gulf of Thailand sampled by bottom trawl during April to July 2015.Hydrological parameters inclu...
This study aims to investigate the relationship among total length (TL) of fish with mouth opening
namely horizontal opening (MH), vertical opening (VH), mouth area (MA) and fork length (FL) of seven
sympatric nemipterid fish species and to know the relationship between total length and consumed prey
length of five sympatric species sampled from th...
Trophic ecology of eight species of nemipterid fish including Nemipterus mesoprion, N. hexodon, N. nemurus, N. nematophorus, N. tambuloides, N. peronii, N. furcosus and Scolopsis taeniopterus were studied to investigate their diet composition and trophic relationships between them. Our findings revealed that they were specific predators feeding mai...
The bioavailability of sediment As, Cr and Pb to the mangrove, Rhizophora mucronata in the Kelantan Delta, Malaysia, was studied. The average total concentration of the metals was 24.93 μg/g dry wt. for As, 52.77 μg/g dry wt. for Cr and 55.05 μg/g dry wt. for Pb. The majority of Cr (91.5%), Pb (88.8%) and As (78.7%) was found in the residual fracti...
This study was aimed to observe the variation in size and growth change at maturity stage of both sexes for six Nemipterus species in the southern part of the Gulf of Thailand. Sample were collected using bottom trawl net was operated on board of “MV PRAMONG 9” research vessel during April -June, 2015. Male maturity stage-III of all fish species di...
The sediment of Pattani Bay in Thailand and the Setiu Wetlands in Malaysia was investigated in the dry and wet seasons of 2014 to evaluate levels of trace metal concentrations (As, Cd, Cu, Pb, and Zn), sediment grain size, and organic matter. The mean concentrations of all the elements in both seasons (dry and wet) at Pattani Bay were higher than t...
This study is aimed to observe the variation in size and growth change at maturity stage of both sexes for two common loliginidae squid species; Photololigo chinensis and P. duvaucelii in the lower part of Gulf of Thailand. Males maturity stage-III of both squid species displayed largest range of mantle length 7.9-42.2 cm (mean 24.7±6.9) and 14-24....
This study was undertaken to assess the levels of trace metals (As, Cd, Cu, Pb, and Zn) in two common species of cockles (Anadara granosa and Anadara inaequivalvis) from two coastal areas in Thailand (Pattani Bay) and Malaysia (the Setiu Wetlands). A total of 350 cockles were collected in February and September 2014. Trace metals were determined by...
The aim of this study is to simultaneously evaluate the impact of ecological and biological conditions on feeding habits of Portunus pelagicus(Linnaeus, 1758). Samples were collected from May 2013 to September 2014 using gill nets. Four moulting stages, three berried stages and four size classes were distinguished in the material collected. It was...