Length–weight Relationship and Relative Condition Factor of the Minor Carp Labeo gonius (Hamilton, 1822) from the Burhi Gandak River, Bihar, India
Amit Singh Kshatri
Department of Fisheries Resource Management, College of Fisheries Science, Chaudhary Charan Singh Haryana Agricultural University, Hisar (125001), Haryana, India and Department of Fisheries Resource Management, College of Fisheries, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur (848125), Bihar, India.
Adita Sharma *
Department of Fisheries Resource Management, College of Fisheries, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur (848125), Bihar, India.
Lavkush
Department of Fisheries Resource Management, College of Fisheries, Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur (848125), Bihar, India and Department of Fisheries Resource Management, College of Fisheries, Aacharya Narendra Deva University of Agriculture and Technology Kumarganj, Ayodhya (224229), Uttar Pradesh, India.
Shikha Ahalavat
Department of Zoology, Chaudhary Charan Singh Haryana Agricultural University, Hisar (125001), Haryana, India.
Kavita Sharma
Department of Fisheries Resource Management, College of Fisheries Science, Chaudhary Charan Singh Haryana Agricultural University, Hisar (125001), Haryana, India.
Nitish Bansal
Department of Fisheries Resource Management, College of Fisheries Science, Chaudhary Charan Singh Haryana Agricultural University, Hisar (125001), Haryana, India.
Arvind Sinha
Department of Fisheries Resource Management, College of Fisheries Science, Chaudhary Charan Singh Haryana Agricultural University, Hisar (125001), Haryana, India.
*Author to whom correspondence should be addressed.
Abstract
The present study evaluated the length–weight relationship (LWR) and relative condition factor (Kn) of minor carp Labeo gonius (Hamilton, 1822) from the Burhi Gandak River, Bihar, India, to assess its growth pattern and physiological condition. A total of 120 specimens were collected monthly from August 2022 to July 2023. The LWR was estimated using the length–weight relationship equation (W = aLᵇ). Males exhibited negative allometric growth (b = 2.4604; R² = 0.9704), whereas females showed positive allometric growth (b = 3.1808; R² = 0.962), due to reproductive development. The mean Kn values were 1.0083 for males and 1.0168 for females, indicating good physiological condition and favourable environmental conditions. The distribution of Kn across size classes suggested stable ecological parameters with minor variations linked to reproductive cycles. The findings provide baseline biometric data useful for fisheries management and conservation of this species in the Burhi Gandak River.
Keywords: Labeo gonius, length–weight relationship, relative condition factor, minor carp