The Influence Of Physical Barriers To Fish Assemblage Along Sungai Enam In Temengor Reservoir, Perak

Satu kajian mengenai pengaruh halangan fizikal terhadap perkumpulan ikan (bilangan spesis ikan, relatif faktor keadaan ikan dan pergerakan ikan) telah dijalankan dari Oktober 2014 hingga Jun 2015 di sembilan ruas sepanjang Sungai Enam di Takungan Temengor, Perak A study on the influence of physical barriers to fish assemblage (i.e., the number of fish species, relative condition factor of fish and fish movements) was carried out from October 2014 to June 2015 at nine reaches along Sungai Enam in Temengor Reservoir, Pera

A review of length-weight relationships of freshwater fishes in Malaysia

This manuscript reviews the length-weight relationships (LWRs) of freshwater fishes in Malaysia. A total of 102 LWRs of fishes gathered from literature pertaining to 64 freshwater fish species were analysed. A meta-analysis from 13 previous reports showed that the b values was ranged from 2.19 (Clarias batrachus) to 4.106 (Barbodes binotatus). Out of 64 observed species, 47 species (11 families) experienced positive allometric growth, while another 23 species (eight families) and 31 species (12 families) were recorded under isometric and negative allometric growth, respectively. The fish LWRs observed can be used as an indicator of environmental changes and fish ecological health for freshwater fishes in Malaysia

Spatial and temporal variations of water quality and trophic status in Bukit Merah Reservoir, Perak

A study of spatial and temporal variations on water quality and trophic status was conducted twice a month from December 2012 to January 2014 in four sampling stations at Bukit Merah Reservoir (BMR). The concentration of dissolved oxygen (DO), water temperature, conductivity, total dissolved solids (TDS), total phosphorous (TP), PO4-, NO2-, NO3-, NH4+ and net primary productivity had significant differences temporally (p<0.05) except for pH, total suspended solids (TSS) and chlorophyll-a. Based on correlation analysis, the amount of rainfall and rain days has negatively correlated with secchi depth and chlorophyll-a (p<0.01). The water level has significantly decreased the value of the temperature, pH, conductivity, TP and NO2- but it has positive correlation with NO3- and NH4+. Discharged from Sungai Kurau increased the value of conductivity, TSS, TP and NO2- as a result from runoff and erosion, thus decreasing the secchi depth values, NO3- and NH4+. The water quality of BMR is classified in Class II and TSI indicates that the BMR has an intermediate level of productivity (mesotrophic) and meets the objective of this reservoir which was to provide water for paddy irrigation