Home range and diel behavior of the ballan wrasse,Labrus bergylta,determined by acoustic telemetry |
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| Institution: | 1. Instituto de Investigaciones Marinas (IIM-CSIC), 36208, Vigo, Spain;2. Instituto Mediterráneo de Estudios Avanzados (CSIC-UIB), 07190, Esporles, Spain;3. Centro Tecnológico del Mar — Fundación CETMAR, 36208, Vigo, Spain;1. AIMS@JCU, Australian Institute of Marine Science, College of Marine and Environmental Sciences, James Cook University, Townsville, Queensland 4811, Australia;2. College of Marine and Environmental Sciences, James Cook University, Townsville, Australia;3. Australian Institute of Marine Science, James Cook University, Townsville, Australia;4. Centre for Sustainable Tropical Fisheries and Aquaculture, James Cook University, Townsville, Australia;5. Aquatic Threatened Species Unit, Department of Environment and Heritage Protection, 41 Boggo Road, Dutton Park, Australia;6. Commonwealth Scientific and Industrial Research Organization, Marine and Atmospheric Research, Cleveland, Queensland 4163, Australia;7. School of Biological Sciences, Moreton Bay Research Station, University of Queensland, Dunwich, Queensland 4183, Australia;1. Environment and Sustainability Institute, University of Exeter, Penryn Campus, Cornwall TR10 9FE, UK;2. Centre for Ecology and Conservation, University of Exeter, Penryn Campus, Cornwall TR10 9FE, UK;3. Scottish Natural Heritage, Silvan House, 231 Corstorphine Road, Edinburgh EH12 7AT, UK;4. MarAlliance, PO Box 283, San Pedro, Ambergris Caye, Belize;5. Manx Basking Shark Watch, Glen Chass Farmhouse, Glen Chass, Port St Mary IM9 5PJ, Isle of Man;6. Scottish Natural Heritage, Great Glen House, Inverness, Scotland IV3 8NW, UK;7. Wave Action, 3 Beacon Cottages, Falmouth TR11 2LZ, UK |
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| Abstract: | Effective fisheries management needs to consider spatial behavior in addition to more traditional aspects of population dynamics. Acoustic telemetry has been extensively used to provide information on fish movements over different temporal and spatial scales. Here, we used a fixed-receiver array to examine the movement patterns of Labrus bergylta Ascanius 1767, a species highly targeted by the artisanal fleet of Galicia, NW Spain. Data from 25 individuals was assessed for a period of 71 days between September and November 2011 in the Galician Atlantic Islands Maritime-Terrestrial National Park. Fish were present within the monitored area more than 92% of the monitored time. The estimated size of individual home ranges, i.e. the area where fish spent most of their time, was small. The total minimum convex polygons area based on all the estimated positions was 0.133 ± 0.072 km2, whereas the home range size estimated using a 95% kernel distribution of the estimated positions was 0.091 ± 0.031 km2. The core area (50% kernel) was 0.019 ± 0.006 km2. L. bergylta exhibited different patterns of movement in the day versus the night, with 92% of the fish detected more frequently and traveling longer distances during the daytime. In addition, 76% of the fish displayed a larger home range during the day versus during the night. The linearity index was less than 0.005 for all fish suggesting random movements but within a relatively small area, and the volume of intersection index between consecutive daily home ranges was 0.75 ± 0.13, suggesting high site fidelity. The small home range and the sedentary behavior of L. bergylta highlight the potential use of small MPAs as a management tool to ensure a sustainable fishery for this important species. |
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