The Effects of Different Types of Stress on Blood Glucose in the Giant Tiger Prawn Penaeus monodon

Journal of the World Aquaculture Society - Tập 29 Số 3 - Trang 290-299 - 1998
Marcia Hall1, Erich H. Van Ham2
1Australian Institute of Marine Science, PMB No. 3, Townsville, M.C., Qld. 4810, Australia
2Department of Experimental Zoology, Faculty of Sciences, Catholic University, Toernooiveld 6525 ED Nijmegen, The Netherlands

Tóm tắt

Abstract— Juvenile Penaeus monodon prawns were exposed to a variety of putative stressom and blood glucose concentrations monitored as an index of metabolic stress. Prawns were held under controlled conditions and food deprived for 12–18 h before blood sampling. Juvenile prawns maintained in tanks at densities of 9, 23, 36 and 50 prawns/m2 for 4 wk did not have significantly different baseline levels of blood glucose, with mean concentrations varying from 1.1 to 1.3 mmol/L. In contrast, as an index of overall condition, antennal length and rostral spine length were significantly degraded in the 36 and 50 prawns/m2 groups compared to the 9 and 23 prawns/m2 groups (P < 0.05). Blood glucose levels were significantly elevated after prawns were exposed to air for 10 min and also increased Significantly when dissolved oxygen was decreased from 6.5 mg/L to 2.1 mg/L. (P < 0.05). Gassing of water from pH 8.5 to 5.9 with carbon dioxide, with a corresponding decrease of dissolved oxygen from 6.6 to 5.9 mg/ L, induced a rapid and significant rise in blood glucose levels from 1.1 to 2.3 mmol/L. In contrast, a decrease of water pH from 8.3 to 5.9 with sulfuric acid, did not result in a significant change in blood glucose concentrations. These findings are discussed in relation to pond management for maintaining prawns in a low stress environment.

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Journal of the World Aquaculture Society

Tập 29 Số 3

290-299

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