Abstract
The objective of this study was to determine whether exposure of rainbow trout (Oncorhynchus mykiss) to water containing a stressed trout or skin extract from stressed and non-stressed trout would elicit a stress response in conspecifics. Juvenile rainbow trout were exposed for 1 hour to water containing a stressed fish, homogenized skin extracts from a non-stressed fish, skin extract from a stressed fish and water with none of these factors. The stress response was measured over a 24-h period (1, 6, 12, 24 h after exposure). Plasma cortisol levels increased at 12 h in fish exposed to water from a stressed fish and skin extract from a stressed fish. Plasma glucose and hepatic hsp70 levels were not affected by treatments. The results suggest that rainbow trout elicit a stress response when exposed to stress-related alarm cues released from conspecifics.
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Toa, D., Afonso, L. & Iwama, G. Stress response of juvenile rainbow trout (Oncorhynchus mykiss)to chemical cues released from stressed conspecifics. Fish Physiol Biochem 30, 103–108 (2004). https://doi.org/10.1007/s10695-005-0266-5
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DOI: https://doi.org/10.1007/s10695-005-0266-5