Effects of temperature and water calcium concentration on growth,survival and moulting of freshwater crayfish,Paranephrops zealandicus |
| |
| Institution: | 1. Department of Fishery, Faculty of Natural Resources and Environment, Ferdowsi University of Mashhad, Mashhad, Iran;2. Department of Food hygiene and Aquaculture, School of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran;3. Department of Sciences and Technologies, University of Sannio, Benevento, Italy;4. Food Science and Technology Research Institute, ACECR, Mashhad Branch, Mashhad, Iran;1. College of Ecology, Lishui University, 323000 Lishui City, Zhejiang Province, China;2. Aquaculture Technology Extending Stations, 323400 Songyang County, Lishui City, Zhejiang Province, China;3. Aquaculture Technology Extending Stations, 323000 Lishui City, Zhejiang Province, China |
| |
| Abstract: | Two 3-month experiments were conducted to investigate the effects of temperature and water calcium concentrations on growth, survival and moulting of freshwater crayfish (Paranephrops zealandicus). Both experiments were conducted using three replicates of five treatments (water temperatures of 14, 16, 18, 20 and 22 °C for Experiment 1 and water calcium concentrations of 0, 5, 10, 30 and 80 mg/L for Experiment 2). Growth rates increased with water temperature (maximum specific growth rate = 0.57) but were unchanged with increased water calcium concentration. Variability in growth rates decreased with increased water calcium concentrations. Survival decreased as water temperatures exceeded 16 °C and increased with water calcium concentrations above 10 mg/L. Inter-moult period decreased from > 90 ± 20 days at water temperatures of 14 °C to ～ 40 ± 10 days at water temperatures > 20 °C. Moult increment of the crayfish was unaltered by either water temperature or water calcium concentrations. The optimum water temperature for productivity under conditions employed was 16 °C. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
