Mismatch between biological,exploitation, and governance scales and ineffective management of sea urchin (Paracentrotus lividus) fisheries in Galicia |
| |
| Institution: | 1. Laboratory of Environmental Biosurveillance, Department of Biology, Faculty of Natural Sciences and Life and Earth Sciences and the Universe, University 08 Mai 1945, Guelma, Algeria;2. Department of Agronomy, Faculty of Natural Sciences and Life, University of Chadli Benjedid El Tarf, Algeria;3. Laboratoire resources marines vivantes, Institut National des Sciences et Technologies de la Mer Salammbo, Tunisia;4. Laboratory of Environmental Biosurveillance, Department of Biology, Faculty of Sciences, Badji Mokhtar University, BP 12, El hadjar, Annaba 23000, Algeria |
| |
| Abstract: | The spatial structure of fishery resources influences stock dynamics and finally the fishery. Therefore, this aspect should be included as a key topic in the assessment and management of fisheries. The fishery of the sea urchin Paracentrotus lividus in Galicia has been used as case study to demonstrate how the mismatch between biological, fishery and management scales causes failures in the governance, giving rise to over-exploitation. P. lividus is spatially distributed in nested biological units: patches, micro-stocks, local populations and metapopulations. Fishing operations are local exploiting micro-stocks; however management units in Galician comprise usually more than one local population. This pattern allows the depletion of several micro-stocks without any short-term signals in the exploitation rates over the complete managed territory. Management units should be redefined according to the boundaries of the local populations. In addition, the implementation of reserve networks or a rotation system could allow to effectively managing the resource at a fine-scale. Any of both regulations could also compensate the inverse density dependence that regulates recruitment and fecundity in this species. |
| |
| Keywords: | Metapopulation Density dependence Management Sea urchin Spatial structure |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
