Life Cycle of the Fairy Shrimp, Phallocryptus spinosa Milne Edwards, 1840 (Crustacea: Anostraca) at Different Temperatures

Authors
M. R. Gharibi 1
M. A. Nematollahi 1
N. Agh 2
B. Atashbar 2
1 Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj, Islamic republic of Iran.
2 Department of Biology, Artemia and Aquatic Animals Research Institute, Urmia University, Urmia, Islamic Republic f Iran.
Abstract
This study was conducted to evaluate a temperature regime ranged from 15 to 30°C on survival, growth, life span and reproductive traits (reproductive period, clutch number, offspring number) of Phallocryptus spinosa from Iran. Newly hatched nauplii (N= 200 and 3 replicates per each treatment) were allocated into containers and maintained at various temperature regimes (at 15, 20, 25 and 30˚C). During trial, the larvae were fed with unicellular algae Dunaliella tertiolecta and Lansy PZ (lipid-enriched yeast). Survival and growth rate of P. spinosa with an interval of 3 days to 18 days were examined. After attaining adulthood, 16 pairs of adult P. spinosa were transferred from all culture vessels into separate containers supplied with 300 ml of brackish water (5 ppt) and similar temperatures to compare their life span and reproductive traits. Based on results obtained, maximum growth at shortest period (13.2±2.0 mm on day 12) was observed at 30°C; whereas, all P. spinosa died before reaching sexual maturity by day 15. Maximum survival (86%) was observed at 15°C; however, minimum growth also was obtained at the same temperature with none of P. spinosa reaching sexual adulthood. On the 18th day, P. spinosa reached sexual adulthood only at 20 and 25°C. Furthermore, a significant difference was observed in most of the reproductive traits especially in total egg production per female at 20°C. Thus, it seems that 20°C is the suitable temperature to rear this fairy shrimp. Future studies should be focused on the feasibility of mass production of this species as a valuable live feed in the aquaculture industry.

Keywords

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Journal of Agricultural Science and Technology
Volume 18, Issue 1
January and February 2016
Pages 171-177