Siti Kadir - Academia.edu (original) (raw)

Papers by Siti Kadir

Research paper thumbnail of Chlorophyll-A Estimation and Relationship Analysis with Sea Surface Temperature and Fish Diversity

JOURNAL OF SUSTAINABILITY SCIENCE AND MANAGEMENT

Phytoplanktons are sensitive to temperature changes and can only thrive in certain sea surface te... more Phytoplanktons are sensitive to temperature changes and can only thrive in certain sea surface temperatures (SST). To determine the relationship between the two variables, the Chlorophyll (Chl-a) in phytoplanktons around the Bidong Island, Terengganu was estimated using the Sentinel-2 Multispectral Instrument (MSI) running two algorithms - C2RCC and OC3M - between 2015 and 2016. The OC3M algorithm resulted in better Chl-a estimation values with RMSE of 0.05 and MAE of 0.049. The relationship analysis was done using linear regression between OC3M Chl-a and MODIS SST. The regression analysis found that the Chl-a variation in the area was only weakly affected by the SST, with highest negative correlation of -0.2867 in September 2016. Fish sampling in the study area showed that there was significant difference in the diversity of fish species between the years 2015 and 2016. Comparison with Chl-a distribution showed that high species diversity and abundance of fish reduces the amount of...

Research paper thumbnail of Physical-Chemical Parameters in Relation to Fish Assemblages in the East Coast of Peninsular Malaysia

Malaysian Applied Biology, 2020

The fish assemblage patterns are partially dependent on the environmental or anthropogenic change... more The fish assemblage patterns are partially dependent on the environmental or anthropogenic changes which always affect the community. The objective of this study was to determine the spatial and temporal distribution pattern of fish assemblages due to physical-chemical in Setiu Wetlands. Fish samples were collected from June 2011 to July 2012 at three study sites using gill, trawl nets, and traps. The salinity and pH results were significantly different among sites and the temperature, pH, and DO revealed significant differences among months. However, the regression obtained between the abundance of fishes and rainfall and the physical-chemical parameters were not-significant differences. The low and negative correlation values were suggested and believed to not be sensitive between fish abundance and physical-chemical parameters. Four water physical- chemical variables in explaining variation in certain some fish species composition and abundance during the rainy and dry season in ...

Research paper thumbnail of First records of the sole, Aseraggodes kobensis (Steindachner, 1896) (Pleuronectiformes, Soleidae), from Malaysia

Check List, 2019

Fifteen specimens (56.4–112.9 mm standard length) of Aseraggodes kobensis (Steindachner, 1896) (P... more Fifteen specimens (56.4–112.9 mm standard length) of Aseraggodes kobensis (Steindachner, 1896) (Pleuronectiformes, Soleidae), previously known from southern Japan to the Gulf of Thailand, were collected from Malaysia. A detailed description is given for the specimens, being the first collected from Malaysian waters and southernmost records of the species.

Research paper thumbnail of Opistognathus nigromarginatus Rüppell, 1830 (Perciformes, Opistognathidae), Bridled Jawfish: a first record from Malaysia

Check List, 2019

A specimen (125.5 mm in standard length) of bridled jawfish, Opistognathus nigromarginatus Rüppel... more A specimen (125.5 mm in standard length) of bridled jawfish, Opistognathus nigromarginatus Rüppell, 1830 was collected from the Pulau Bidong, Terengganu, Malaysia using research trawler. Opistognathus nigromarginatus previously has been recorded from Southern Africa to the Persian Gulf, India, Thailand, and Vietnam. We document the first record of this species in Malaysia and the southernmost occurrence in the South China Sea and Western Pacific Ocean. Detailed morphometric and meristic data are presented along with brief diagnostic characters.

Research paper thumbnail of Coral Reef Fish Community at Pulau Bidong, Terengganu, South China Sea

JOURNAL OF SUSTAINABILITY SCIENCE AND MANAGEMENT, 2021

Reef fishes are among the main constituents of coral reef ecosystems and an indicator of ecosyste... more Reef fishes are among the main constituents of coral reef ecosystems and an indicator of ecosystem health. The aim of this study is to determine the species occurrences of coral reef fish at Pulau Bidong, which is in the South China Sea off the east coast state of Terengganu, Peninsular Malaysia. Fish surveys were conducted from May to July 2018 using the visual census technique during SCUBA dives around the island. A total of 30 families, 61 genera and 101 species of coral reef fishes were identified. This indicates considerably high fish diversity and reflects the good condition of the reefs. Of the species identified, 65 % were reef-associated, 12 % were pelagic-oceanic and the rest (23 %) appeared to be found in both zones. The fish species were classified according to social behaviour (territorial, gregarious and nocturnal), feeding habits (carnivorous, herbivorous, omnivorous, planktivores, corallivores and invertebrate consumers) and IUCN Red List status (endangered, near threatened, vulnerable and data deficient). Of all the fish identified, 67±2 % were recorded either at Karang Tengah, Batu Payung or Dinding Laut-reef sites with considerable benthic structural complexity. Such reefs, with complex underwater features that attract a variety of fish species, are particularly important areas of Pulau Bidong and may provide an ecological baseline data that is useful for research and conservation management.

Research paper thumbnail of Eco-Heart Index as a tool for community-based water quality monitoring and assessment

Ecological Indicators

This study aimed to develop an economical, user-friendly, policy-relevant and impactful community... more This study aimed to develop an economical, user-friendly, policy-relevant and impactful community-based water quality monitoring and assessment tool called Eco-Heart Index. Simple and economical water quality monitoring tools, such as Pact Test and LAQUAtwin, were used for Eco-Heart Index. The data was validated by comparing with those obtained using standard methods. Eco-Heart Index is a novel water quality indicator that draws a heart shape based on a result of 6 water quality parameters (pH, heavy metals, chemical oxygen demand, transparency, ammonia nitrogen and dissolved oxygen), which then indicates the water quality (i.e., a full heart stands for clean water, while a broken heart stands for polluted water). This simplified tool was applied to the Langat River basin in Malaysia to generate a water quality map and to categorize the pollution trend based on the drawn figures. The water quality map showing the results of Eco-Heart Index clearly visualized the occurrence and distribution of the water pollution in the whole river basin. Specifically, a full heart shape appeared in upstream areas, whereas various broken heart shapes appeared in mid-stream and downstream areas, particularly in populated and land development areas. Eco-Heart Index was strongly correlated with the National Water Quality Index for Malaysia, suggesting that it could also be utilized as an alternative tool for water quality categorization. In conclusion, Eco-Heart Index has the great potential to be a community-based water quality indicator that could be understood through the universal symbol of peace and love.

Research paper thumbnail of Occurrence and the ecological implication of a tropical anguillid eel Anguilla marmorata from peninsular Malaysia

ZooKeys

Recent studies suggested that accurate species identification in the tropical anguillid eels base... more Recent studies suggested that accurate species identification in the tropical anguillid eels based on morphological examination requires confirmation by molecular genetic analysis. Previous studies found that two tropical anguillid eels, Anguilla bicolor bicolor and A. bengalensis bengalensis, were found in peninsular Malaysia (West Malaysia) based on morphological and molecular genetic analyses. This study is the first record of A. marmorata in peninsular Malaysia confirmed by both morphological and molecular genetic analyses. The present study also suggests that accurate tropical eel species identification is difficult by morphological identification alone; therefore, molecular genetic analysis is needed for precise species confirmation.

Research paper thumbnail of First record of albinism in a tropical anguillid eel Anguilla bengalensis bengalensis from Malaysia

Marine Biodiversity Records, 2015

Research paper thumbnail of Chlorophyll-A Estimation and Relationship Analysis with Sea Surface Temperature and Fish Diversity

JOURNAL OF SUSTAINABILITY SCIENCE AND MANAGEMENT

Phytoplanktons are sensitive to temperature changes and can only thrive in certain sea surface te... more Phytoplanktons are sensitive to temperature changes and can only thrive in certain sea surface temperatures (SST). To determine the relationship between the two variables, the Chlorophyll (Chl-a) in phytoplanktons around the Bidong Island, Terengganu was estimated using the Sentinel-2 Multispectral Instrument (MSI) running two algorithms - C2RCC and OC3M - between 2015 and 2016. The OC3M algorithm resulted in better Chl-a estimation values with RMSE of 0.05 and MAE of 0.049. The relationship analysis was done using linear regression between OC3M Chl-a and MODIS SST. The regression analysis found that the Chl-a variation in the area was only weakly affected by the SST, with highest negative correlation of -0.2867 in September 2016. Fish sampling in the study area showed that there was significant difference in the diversity of fish species between the years 2015 and 2016. Comparison with Chl-a distribution showed that high species diversity and abundance of fish reduces the amount of...

Research paper thumbnail of Physical-Chemical Parameters in Relation to Fish Assemblages in the East Coast of Peninsular Malaysia

Malaysian Applied Biology, 2020

The fish assemblage patterns are partially dependent on the environmental or anthropogenic change... more The fish assemblage patterns are partially dependent on the environmental or anthropogenic changes which always affect the community. The objective of this study was to determine the spatial and temporal distribution pattern of fish assemblages due to physical-chemical in Setiu Wetlands. Fish samples were collected from June 2011 to July 2012 at three study sites using gill, trawl nets, and traps. The salinity and pH results were significantly different among sites and the temperature, pH, and DO revealed significant differences among months. However, the regression obtained between the abundance of fishes and rainfall and the physical-chemical parameters were not-significant differences. The low and negative correlation values were suggested and believed to not be sensitive between fish abundance and physical-chemical parameters. Four water physical- chemical variables in explaining variation in certain some fish species composition and abundance during the rainy and dry season in ...

Research paper thumbnail of First records of the sole, Aseraggodes kobensis (Steindachner, 1896) (Pleuronectiformes, Soleidae), from Malaysia

Check List, 2019

Fifteen specimens (56.4–112.9 mm standard length) of Aseraggodes kobensis (Steindachner, 1896) (P... more Fifteen specimens (56.4–112.9 mm standard length) of Aseraggodes kobensis (Steindachner, 1896) (Pleuronectiformes, Soleidae), previously known from southern Japan to the Gulf of Thailand, were collected from Malaysia. A detailed description is given for the specimens, being the first collected from Malaysian waters and southernmost records of the species.

Research paper thumbnail of Opistognathus nigromarginatus Rüppell, 1830 (Perciformes, Opistognathidae), Bridled Jawfish: a first record from Malaysia

Check List, 2019

A specimen (125.5 mm in standard length) of bridled jawfish, Opistognathus nigromarginatus Rüppel... more A specimen (125.5 mm in standard length) of bridled jawfish, Opistognathus nigromarginatus Rüppell, 1830 was collected from the Pulau Bidong, Terengganu, Malaysia using research trawler. Opistognathus nigromarginatus previously has been recorded from Southern Africa to the Persian Gulf, India, Thailand, and Vietnam. We document the first record of this species in Malaysia and the southernmost occurrence in the South China Sea and Western Pacific Ocean. Detailed morphometric and meristic data are presented along with brief diagnostic characters.

Research paper thumbnail of Coral Reef Fish Community at Pulau Bidong, Terengganu, South China Sea

JOURNAL OF SUSTAINABILITY SCIENCE AND MANAGEMENT, 2021

Reef fishes are among the main constituents of coral reef ecosystems and an indicator of ecosyste... more Reef fishes are among the main constituents of coral reef ecosystems and an indicator of ecosystem health. The aim of this study is to determine the species occurrences of coral reef fish at Pulau Bidong, which is in the South China Sea off the east coast state of Terengganu, Peninsular Malaysia. Fish surveys were conducted from May to July 2018 using the visual census technique during SCUBA dives around the island. A total of 30 families, 61 genera and 101 species of coral reef fishes were identified. This indicates considerably high fish diversity and reflects the good condition of the reefs. Of the species identified, 65 % were reef-associated, 12 % were pelagic-oceanic and the rest (23 %) appeared to be found in both zones. The fish species were classified according to social behaviour (territorial, gregarious and nocturnal), feeding habits (carnivorous, herbivorous, omnivorous, planktivores, corallivores and invertebrate consumers) and IUCN Red List status (endangered, near threatened, vulnerable and data deficient). Of all the fish identified, 67±2 % were recorded either at Karang Tengah, Batu Payung or Dinding Laut-reef sites with considerable benthic structural complexity. Such reefs, with complex underwater features that attract a variety of fish species, are particularly important areas of Pulau Bidong and may provide an ecological baseline data that is useful for research and conservation management.

Research paper thumbnail of Eco-Heart Index as a tool for community-based water quality monitoring and assessment

Ecological Indicators

This study aimed to develop an economical, user-friendly, policy-relevant and impactful community... more This study aimed to develop an economical, user-friendly, policy-relevant and impactful community-based water quality monitoring and assessment tool called Eco-Heart Index. Simple and economical water quality monitoring tools, such as Pact Test and LAQUAtwin, were used for Eco-Heart Index. The data was validated by comparing with those obtained using standard methods. Eco-Heart Index is a novel water quality indicator that draws a heart shape based on a result of 6 water quality parameters (pH, heavy metals, chemical oxygen demand, transparency, ammonia nitrogen and dissolved oxygen), which then indicates the water quality (i.e., a full heart stands for clean water, while a broken heart stands for polluted water). This simplified tool was applied to the Langat River basin in Malaysia to generate a water quality map and to categorize the pollution trend based on the drawn figures. The water quality map showing the results of Eco-Heart Index clearly visualized the occurrence and distribution of the water pollution in the whole river basin. Specifically, a full heart shape appeared in upstream areas, whereas various broken heart shapes appeared in mid-stream and downstream areas, particularly in populated and land development areas. Eco-Heart Index was strongly correlated with the National Water Quality Index for Malaysia, suggesting that it could also be utilized as an alternative tool for water quality categorization. In conclusion, Eco-Heart Index has the great potential to be a community-based water quality indicator that could be understood through the universal symbol of peace and love.

Research paper thumbnail of Occurrence and the ecological implication of a tropical anguillid eel Anguilla marmorata from peninsular Malaysia

ZooKeys

Recent studies suggested that accurate species identification in the tropical anguillid eels base... more Recent studies suggested that accurate species identification in the tropical anguillid eels based on morphological examination requires confirmation by molecular genetic analysis. Previous studies found that two tropical anguillid eels, Anguilla bicolor bicolor and A. bengalensis bengalensis, were found in peninsular Malaysia (West Malaysia) based on morphological and molecular genetic analyses. This study is the first record of A. marmorata in peninsular Malaysia confirmed by both morphological and molecular genetic analyses. The present study also suggests that accurate tropical eel species identification is difficult by morphological identification alone; therefore, molecular genetic analysis is needed for precise species confirmation.

Research paper thumbnail of First record of albinism in a tropical anguillid eel Anguilla bengalensis bengalensis from Malaysia

Marine Biodiversity Records, 2015