The impact of bait collection by anglers on marine intertidal invertebrates |
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| Institution: | 1. Laboratorio de Fisiología y Genética Marina (FIGEMA), Centro de Estudios Avanzados en Zonas Áridas (CEAZA) & Universidad Católica del Norte, 1781421 Coquimbo, Chile;2. Programa de Magister en Ciencia del Mar mención Recursos Costeros, Facultad de Ciencias del Mar, Universidad Católica del Norte, 1781421 Coquimbo, Chile;3. Departamento de Biología Marina, Facultad de Ciencias del Mar, Universidad Católica del Norte, 1781421 Coquimbo, Chile;1. CNR IVALSA, Via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy;2. IDM Süd Tirol, Via Siemens 19, I- 39100 Bolzano, Italy;3. CRA ING, Via della Pascolare 16, I-00015 Monterotondo, Italy;1. Fish Ecology and Conservation Physiology Laboratory, Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6;2. Department of Natural Resources and Environmental Sciences, University of Illinois, Champaign, IL 61801, USA;3. Cape Eleuthera Institute, Eleuthera, Bahamas;4. Department of Environmental Conservation, University of Massachusetts Amherst, 160 Holdsworth Way, Amherst, MA 01003, USA;5. Department of Psychology, Neuroscience, and Behaviour, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4L8;6. Department of Biology, The College of The Bahamas, Box F-2766, Freeport, Grand Bahama, Bahamas;7. Institute of Environmental Science, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6;1. Department of Paediatrics, Foundation IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy;2. Department of Maternal and Children’s Health, Obstetrics and Gynecology Unit, Foundation IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy;3. Department of Electrical, Computer and Biomedical Engineering, University of Pavia, Italy;4. Department of Maternal and Children’s Health, Neonatal Intensive Care Unit, Foundation IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy;1. Department of Aquatic Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, G. C., Evin, Tehran, Islamic Republic of Iran;2. Department of Natural Resources and Environment, College of Agriculture, Shiraz University, Islamic Republic of Iran |
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| Abstract: | A study was carried out to determine the rate at which lugworms returned to areas of beach depopulated by digging. Over a six-month experimental period there was no significant increase in the density of worms in depopulated areas. Control populations remained approximately constant during June and July but decreased in density throughout the remainder of the study, leading to some convergence of treatment and control areas by the end of the experiment. A second study investigated the choice of boulders by intertidal crabs. It was demonstrated that replacing a boulder rather than inverting it after searching underneath for crab baits significantly increased the probability of finding crabs on subsequent tides. |
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