Jongkar Grinang
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View article: Impact of land use and seasonality on faecal coliform abundance and physicochemical water quality in Batang Layar river, Sarawak, Malaysian Borneo
Impact of land use and seasonality on faecal coliform abundance and physicochemical water quality in Batang Layar river, Sarawak, Malaysian Borneo Open
Batang Layar, a biodiverse tropical river in Sarawak, is a vital water source for the local communities. However, it is threatened by contamination from agricultural runoff and untreated sewage, posing public health risks. This study exami…
View article: Effectiveness of two synthetic hormones (LHRHA and Ovaprim) on induced breeding of the Bornean spotted barb, Puntius sealei (Herre, 1933)
Effectiveness of two synthetic hormones (LHRHA and Ovaprim) on induced breeding of the Bornean spotted barb, Puntius sealei (Herre, 1933) Open
Puntius sealei or the Bornean Spotted Barb is a cyprinid of incidental economic importance throughout its distribution range within freshwater habitats of the island of Borneo. The aim of this study was to compare the effectiveness of two …
View article: First report of hard shell female mating in the crenate swimming crab, Thalamita crenata Ruppell, 1830 (Crustacea: Decapoda: Portunidae)
First report of hard shell female mating in the crenate swimming crab, Thalamita crenata Ruppell, 1830 (Crustacea: Decapoda: Portunidae) Open
The mating behaviour of crustaceans, particularly brachyuran crabs, is commonly associated with the female molting cycle, with soft shell mating prevalent among sexually reproducing species, while hard shell mating is a rarely observed ada…
View article: Checklist of the Odonata (Insecta) of Sundaland and Wallacea (Malaysia, Singapore, Brunei, Indonesia and Timor Leste)
Checklist of the Odonata (Insecta) of Sundaland and Wallacea (Malaysia, Singapore, Brunei, Indonesia and Timor Leste) Open
A checklist, based on a database containing published data, of the Odonata (dragonflies and damselflies) occurring in Sundaland and Wallacea is presented. The presence of (sub)species is indicated for eight main regions (Singapore & Penins…
View article: Review of: "Stock Estimation Trial From Spatio-temporal Limited Data of Six Commercial Species in the Middle Madeira River, Southwest Amazon"
Review of: "Stock Estimation Trial From Spatio-temporal Limited Data of Six Commercial Species in the Middle Madeira River, Southwest Amazon" Open
Potential competing interests: No potential competing interests to
View article: Foraging Behaviour of Three Shorebird Species on Coastal Mudflats of Southwestern Sarawak
Foraging Behaviour of Three Shorebird Species on Coastal Mudflats of Southwestern Sarawak Open
Many shorebirds are long-distance migrants and they congregate on intertidal mudflats for feeding throughout their non-breeding season. Despite being one of the key staging sites for migratory shorebirds, data on shorebirds foraging ecolog…
View article: Fish Communities of Tropical Headwater Streams Under Multiple Land-use Influence
Fish Communities of Tropical Headwater Streams Under Multiple Land-use Influence Open
The intensive development of agricultural activities can be a major threat to the extinction of fish fauna in the tropical headwater streams of Borneo Island. Insufficient information on the influence of multiple land-use on fish communiti…
View article: Establishment of A New Bornean Genus of Gecarcinucidae (Crustacea: Brachyura), with Descriptions of Five New Species.
Establishment of A New Bornean Genus of Gecarcinucidae (Crustacea: Brachyura), with Descriptions of Five New Species. Open
The freshwater gecarcinucid species from Borneo previously referred to Sundathelphusa Bott, 1969, are transferred to a new genus. Borneosa gen. nov. can be diagnosed by the presence of a distinct frontal median triangle that is shorter tha…
View article: Establishment of A New Bornean Genus of Gecarcinucidae (Crustacea: Brachyura), with Descriptions of Five New Species
Establishment of A New Bornean Genus of Gecarcinucidae (Crustacea: Brachyura), with Descriptions of Five New Species Open
This dataset contains the digitized treatments in Plazi based on the original journal article Ng, Peter K L, Grinang, Jongkar (2022): Establishment of A New Bornean Genus of Gecarcinucidae (Crustacea: Brachyura), with Descriptions of Five …
View article: Patterns of Fish Assemblage, Growth, and Diet Composition in a Tropical River between Two Cascading Hydropower Dams
Patterns of Fish Assemblage, Growth, and Diet Composition in a Tropical River between Two Cascading Hydropower Dams Open
Construction of cascade dams has been shown to have impacts on fish assemblages and biodiversity. Yet, there is no literature on fish assemblages in the Murum River that connects the cascading Bakun and Murum dams in Sarawak, Malaysia. Hen…
View article: Parosphromenus barbarae, a new species of Licorice Gourami from Sarawak, Borneo (Teleostei: Osphronemidae)
Parosphromenus barbarae, a new species of Licorice Gourami from Sarawak, Borneo (Teleostei: Osphronemidae) Open
In Sarawak, there are two main populations of Parosphromenus known, the eastern population linked to the Rejang River basin being P. allani, and the western population linked to the Batang Kayan basin, is herein described as P. barbarae, n…
View article: The fecundity and egg size of the freshwater crab(Isolapotamon bauense Ng,1987)from Sarawak, Borneo
The fecundity and egg size of the freshwater crab(Isolapotamon bauense Ng,1987)from Sarawak, Borneo Open
This paper describes the fecundity and egg size of the giant freshwater crab (Isolapotamon bauense Ng, 1987) from Kuching Division in Sarawak, Borneo. The fecundity of the crab is between 26 and 81 eggs, with the egg diameter ranging betwe…
View article: Relationships between water quality and dissolved metal concentrations in a tropical river under the impacts of land use, incorporating multiple linear regression (MLR)
Relationships between water quality and dissolved metal concentrations in a tropical river under the impacts of land use, incorporating multiple linear regression (MLR) Open
The water quality and dissolved metal concentrations of the Baleh River were measured at 22 stations over four samplings, in March, June, September and December 2017. It is a tropical river under the influence of numerous land use activiti…
View article: Macroinvertebrates of the Tributaries of Upper Baleh River, Sarawak
Macroinvertebrates of the Tributaries of Upper Baleh River, Sarawak Open
Studies on Baleh River with respect to aquatic fauna currently remains limited. Hence, this paper presents thespecies richness and composition of macroinvertebrates14 tributaries of Upper Baleh River in Kapit Division,Sarawak. A total of 1…
View article: Impacts of sulfide exposure on juvenile Tor tambroides (Bleeker, 1854): behavioral responses and mortality
Impacts of sulfide exposure on juvenile Tor tambroides (Bleeker, 1854): behavioral responses and mortality Open
Construction of hydroelectric reservoirs had been reported to be the cause of increased sulfide levels resulting from the decomposition of organic matter. As more dams are being built, a better understanding of the impact of sulfide on ind…
View article: Fish Assemblages, Growth Pattern and Environmental Factors in Upper Baleh River, Kapit, Sarawak
Fish Assemblages, Growth Pattern and Environmental Factors in Upper Baleh River, Kapit, Sarawak Open
A survey of the freshwater fish composition in the upper Baleh River, Sarawak was conducted in 2015. A total of 1,538 specimens, comprising 45 species from nine families were collected using electrofishing devices and cast nets. The family…
View article: Geometric morphometric analysis in female freshwater crabs of Sarawak (Borneo) permits addressing taxonomy-related problems
Geometric morphometric analysis in female freshwater crabs of Sarawak (Borneo) permits addressing taxonomy-related problems Open
The taxonomy of freshwater crabs requires a paradigm change in methodological approaches, particularly in investigations that use morphological techniques. The traditional morphometric approach (two-dimensional measurements) tends to be in…
View article: Effects of Opened and Closed Spillway Operations of a Large Tropical Hydroelectric Dam on the Water Quality of the Downstream River
Effects of Opened and Closed Spillway Operations of a Large Tropical Hydroelectric Dam on the Water Quality of the Downstream River Open
Water quality downstream of a hydroelectric dam is potentially affected by dam operations and other land uses in the river basin. Previous short-distance studies below the large Bakun Dam indicated poorer water quality during closed spillw…
View article: Water Quality Assessment of Tributaries of Batang Baleh in Sarawak Using Cluster Analysis
Water Quality Assessment of Tributaries of Batang Baleh in Sarawak Using Cluster Analysis Open
Assessment of river water quality is essential as it provides the knowledge required to make informed decisions. Therefore, water quality was determined at 15 tributary stations located along the Batang Baleh, Sarawak. Results of the study…
View article: Freshwater Crabs of Upper Baleh River, Sarawak
Freshwater Crabs of Upper Baleh River, Sarawak Open
Freshwater crabs are among the most threatened species, primarily due to their high levels of endemicity, poor dispersal ability, low fecundity and the relatively fragmented nature of freshwater ecosystems. Consequently, regional diversity…
View article: Assessment of Heavy Metals in Water, Fish and Sediments of the Baleh River, Sarawak, Malaysia
Assessment of Heavy Metals in Water, Fish and Sediments of the Baleh River, Sarawak, Malaysia Open
This paper reports the heavy metals content in water, sediments and in fish of the Baleh River, in order to evaluate the contamination status of metals. Water and sediment samples were obtained from seven stations located upstream of the B…
View article: Nutrient Level of a Young Tropical Hydroelectric Dam Reservoir in Sarawak, Malaysia
Nutrient Level of a Young Tropical Hydroelectric Dam Reservoir in Sarawak, Malaysia Open
Monitoring the nutrient level of a reservoir is crucial as excess nutrients can lead to hypoxia and fish kills in the reservoir. Hence, this study was carried out to examine the nutrient level of the Bakun reservoir, which is a newly built…
View article: A preliminary study of the macroinvertebrate fauna of freshwater habitats in Maludam National Park, Sarawak
A preliminary study of the macroinvertebrate fauna of freshwater habitats in Maludam National Park, Sarawak Open
Macroinvertebrates are diverse and widespread, and they play important ecological roles in aquatic ecosystems; yet little is known about the macroinvertebrate fauna of the peat swamp forests of Borneo. In light of this knowledge gap, we pr…
View article: Physicochemical Parameters and Fish Assemblages in the Downstream River of a Tropical Hydroelectric Dam Subjected to Diurnal Changes in Flow
Physicochemical Parameters and Fish Assemblages in the Downstream River of a Tropical Hydroelectric Dam Subjected to Diurnal Changes in Flow Open
The downstream river of the tropical Batang Ai Dam is experiencing diurnal flow fluctuation due to power generation operation. Three samplings were conducted to collect the water quality and fish assemblage data and one sampling was conduc…
View article: Influence of Rainfall on the Physicochemical Characteristics of a Tropical River in Sarawak, Malaysia
Influence of Rainfall on the Physicochemical Characteristics of a Tropical River in Sarawak, Malaysia Open
A rainfall event is an important factor that can greatly affect the water quality of a river, particularly in a tropical country where the seasonal variations of river water quality are mainly dominated by precipitation.Hence, the present …
View article: Nutrient Contents of the Freshwater Crab, Isolapotamon bauense from Sarawak, Malaysia (Borneo)
Nutrient Contents of the Freshwater Crab, Isolapotamon bauense from Sarawak, Malaysia (Borneo) Open
Data on nutrient contents of freshwater crabs are important for ecological studies and species conservation assessments, especially when the species concerned is threatened among others by habitat destruction and uncontrolled resources u…