A behavioural sensor for fish stress |
| |
| Institution: | 1. Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel;2. Israel Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel;1. SINTEF Fisheries and Aquaculture, NO-7465 Trondheim, Norway;2. NTNU Department of Engineering Cybernetics, NO-7491 Trondheim, Norway;3. Nofima, NO-6600 Sunndalsøra, Norway;4. AllerAqua AS, Allervej 130, 6070 Christiansfeld, Denmark;1. Department of Chemistry and CESAM (Centre for Environmental and Marine Studies), University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal;2. Department of Applied Chemistry and Physics, University of Léon, Campus de Vegazana, Léon, Spain;3. Environmental and Planning Department and CESAM (Centre for Environmental and Marine Studies), University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal;1. USGS, Leetown Science Center, 11649 Leetown Road, Kearneysville, WV, 25430, United States;2. USFWS Warm Springs Regional Fisheries Center, 5308 Spring Street, Warm Springs, GA, 3180-9712, United States;3. USGS, Leetown Science Center, 11649 Leetown Road, Kearneysville, WV, 25430, United States;4. The Conservation Fund-Fresh Water Institute, 1098 Turner Road, Shepherdstown, WV, 25443, United States;5. Auburn University, Department of Fisheries and Allied Aquacultures, Auburn, AL, 36830, United States;1. Christian Michelsen Research AS, P.O. Box 6031, NO-5892 Bergen, Norway;2. Department of Chemistry and Molecular Biology, Marine Chemistry, University of Gothenburg, SE-412 96 Gothenburg, Sweden;3. Department of Oceanography, Dalhousie University, Halifax, NS B3H 4R2, Canada;4. Aanderaa Data Instruments AS, Sanddalsringen 5b, P.O. Box 103, Midttun, NO-5828 Bergen, Norway |
| |
| Abstract: | Due to water turbidity, fish stress might be difficult to observe. Evaluation of fish stress by blood sampling requires removing a fish from the water, which is in itself a stressful event. Therefore, we designed and built a sensor to detect fish behaviour that reflects stress. The electronic sensor detected early signs of fish stress by scoring the fish's inactivity. LEDs and detectors are embedded on a steel wand that is held underwater by an operator. In this preliminary (feasibility) study, the new sensor was validated for Tilapia (Cichlidae) and Hybrid Striped Bass (Morone). We induced stressful situations in the fish tanks by manipulating oxygen and temperature levels.ResultsLowering the temperature and oxygen levels both significantly increased the average number of signals identified by the sensor, which indicate stress. The effect of reducing water temperature from 24 °C to 15 °C was three times stronger than was the effect of lowering the oxygen saturation level from 85% to 50%. The difference in the number of signals between the good and stressful conditions was statistically significant, amounting to approximately eight sensor signals, 10.57 compared to 2.49 respectively. Lowering the temperature increased the mean number of signals by 5.85 and 6.06 at 85% and 50% oxygen saturation respectively, whereas lowering oxygen levels increased the mean number of signals by 2.02 and 2.23 at 24 °C and 15 °C, respectively. The results indicate that the stress status of cultured fish can be evaluated using the proposed behavioural sensor. The new sensor may provide an earlier indication of a problem in a fish tank or pond than was heretofore possible. This early warning can enable the fish farmer to take action before many fish are harmed. |
| |
| Keywords: | Fish stress Sensor Farmed fish Early signal |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
