Physiological traits and population dynamics of Schizothorax niger (Heckel, 1838): Insights from Dal Lake and the Jhelum River, Kashmir, Himalayan region.

Autor: Karthik N; Department of Fisheries Resource Management, Faculty of Fisheries, SKUAST, Srinagar, Jammu & Kashmir, India., Bhat FA; Department of Fisheries Resource Management, Faculty of Fisheries, SKUAST, Srinagar, Jammu & Kashmir, India., Qayoom I; Department of Aquatic Environment and Management, Faculty of Fisheries, SKUAST, Srinagar, Jammu & Kashmir, India., Jayakumar N; Department of Fisheries Biology and Resource Management, Fisheries College and Research Institute, Tamil Nadu Dr. J. Jayalalithaa Fisheries University, Thoothukudi, Tamil Nadu, India., Sudhan C; Department of Fisheries Resource Management, Dr. M.G.R. Fisheries College and Research Institute, Tamil Nadu Dr. J. Jayalalithaa Fisheries University, Ponneri, Tamil Nadu, India., Seenivasan P; Fisheries Economics, Extension and Statistics Division, ICAR-Central Institute of Fisheries Education, Mumbai, Maharashtra, India., Meril D; Department of Aquatic Environment and Management, College of Fisheries Science, St. Devasahayam Institute of Fisheries Science and Technology, Kanniyakumari, Tamil Nadu, India., Mohd I; Department of Fisheries Resource Management, Faculty of Fisheries, SKUAST, Srinagar, Jammu & Kashmir, India., Mattoo A; Department of Fisheries Resource Management, Faculty of Fisheries, SKUAST, Srinagar, Jammu & Kashmir, India.
Jazyk: angličtina
Zdroj: Journal of fish biology [J Fish Biol] 2024 Oct 29. Date of Electronic Publication: 2024 Oct 29.
DOI: 10.1111/jfb.15967
Abstrakt: This study examines the physicochemical characteristics, morphometric features, biometric growth parameters, biological indices, physiological parameters, and biochemical profiles of Schizothorax niger population. The physicochemical analysis revealed a maximum temperature of 12.93 ± 1.33°C and hardness of 156.53 ± 12.82 mg/L in Dal Lake, whereas the Jhelum River had a minimum level of 10.94 ± 1.12°C temperature and 128.31 ± 11.62 mg/L of hardness. Dal Lake had a neutral pH (7.5 ± 0.2) and lower dissolved oxygen (6.8 ± 0.4 mg/L) compared to the Jhelum River (pH 7.2 ± 0.3; dissolved oxygen 7.5 ± 0.5 mg/L). Morphometric analysis showed significant differences (p < 0.05) in fish length (Dal Lake: 18.4 ± 2.1 cm; the Jhelum River: 21.0 ± 1.8 cm) and weight (Dal Lake: 74.5 ± 9.8 g; the Jhelum River: 92.2 ± 7.4 g) between the sites. Biometric growth parameters demonstrated a positive allometric growth pattern, with Dal Lake having a steeper slope (b = 3.15) than the Jhelum River (b = 2.98). Biological indices revealed gender-based variations in the gonado-somatic index (GSI) and hepato-somatic index (HSI), with GSI being higher in Dal Lake (0.21 ± 0.02) and HSI in the Jhelum River (1.04 ± 0.09). Haematological and biochemical analyses showed significant differences in parameters such as haematocrit (Dal Lake: 29.2 ± 2.1%; the Jhelum River: 32.4 ± 1.8%), glucose (Dal Lake: 85.3 ± 5.4 mg/dL; the Jhelum River: 68.1 ± 4.2 mg/dL), and total protein (Dal Lake: 6.2 ± 0.4 g/dL; the Jhelum River: 5.8 ± 0.3 g/dL) between sites. These findings provide valuable insights into the physiological traits and population dynamics of S. niger, informing species-specific conservation strategies and ecosystem management practices.
(© 2024 Fisheries Society of the British Isles.)
Databáze: MEDLINE
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