Length-weight Relationship and Condition Factor of Fishes Collected from Chembarambakkam Lake, Tamilnadu, India
Noornissabegum M *
Post Graduate and Research Department of Zoology, Ethiraj College for Women, Chennai, Tamil Nadu, India.
Ushasri A S
Post Graduate and Research Department of Zoology, Ethiraj College for Women, Chennai, Tamil Nadu, India.
*Author to whom correspondence should be addressed.
Abstract
The current study describes the length weight relationship of four different fish species, Oreochromis mossambicus, Osteobrama cotio, and Pseudetroplus maculatus and Systomus sarana to signify the aquatic condition of fishes collected from Chembarambakkam Lake, Tamil Nadu. A total of 135 fish individuals from four species were sampled, and each total length and weight were confirmed to be unique. Estimated LWR parameter “b” (slope) highted with positive allometric growth patterns in Oreochromis mossambicus, Osteobrama cotio, and Pseudetroplus maculatus and negative allometric in Systomus sarana. Fulton's and relative condition factor results represented greater than 1 in Oreochromis mossambicus, Osteobrama cotio, and Pseudetroplus maculatus and Systomus sarana ranged to 0.85 - 0.99. LWR parameter exhibited unique ranges in four different fish species studied might be due to shape & size of fishes, development pattern, etc. This study is the first baseline report on Length-weight relationship of the fish species taken from Chembarambakkam lake and the results can be considered as a basic biological parameter that might be useful partly for conservation and management of the examined fishes. It is expected that the findings of this study will enhance stock assessment and management of fish population in Chembarambakkam lake ecosystem.
Keywords: Length-weight relationship, Fulton's and relative condition factor, Oreochromis mossambicus, Osteobrama cotio, Systomus sarana, Pseudetroplus maculatus, Chembarambakkam Lake