TY - JOUR T1 - Tests and jaws’ morphological patterns of regular sea urchin Paracentrotus lividus (Lamarck, 1816) in relation to environmental conditions A1 - Caill-Milly,Nathalie A1 - Mahias,Jérémy A1 - Bru,Noelle A1 - de Casamajor,Marie-Noelle A1 - Pigot,Thierry A1 - Corbet,Paul AD - IFREMER, Laboratoire Environnement Ressources Arcachon - Fédération MIlieux et Ressources Aquatiques (MIRA), 1 Allée du Parc Montaury, 64600 Anglet, France AD - UNIV PAU & PAYS ADOUR, Collège STEE – 1 Allée Parc Montaury, 64600 Anglet, France AD - CNRS/ UNIV PAU & PAYS ADOUR/ E2S UPPA, Laboratoire de Mathématiques et de leurs Applications de Pau (LMAP) - Fédération MIlieux et Ressources Aquatiques (MIRA), UMR5142, 64000 Pau, France AD - CNRS/ UNIV PAU & PAYS ADOUR/ E2S UPPA, Institut des Sciences Analytiques et de Physico- Chimie pour l’Environnement et les Matériaux (IPREM) – Fédération MIlieux et Ressources Aquatiques (MIRA), UMR5254, 64600 Anglet, France UR - https://doi.org/10.1016/j.rsma.2020.101220 DO - 10.1016/j.rsma.2020.101220 KW - Morphometry KW - Body size KW - Aristotle's lantern KW - Sewage discharge KW - Coastal zone KW - Biological indices N2 - This paper investigates whether morphological variability of test and Aristotle’s lantern can be detected in sea urchins exposed to domestic pollution and whether this variability can be also related to tidal level and hydrodynamic features. The study was conducted on four sites along the French Basque coast. Each site is characterized by its geological layers’ orientation, regardless of its proximity to sewage outlets. Analyses on high-resolution pictures of jaws were performed and three parameters were retained: length, height and demipyramid dry mass. Five shape descriptors were consequently defined regarding the test and the jaws. Individuals with heavy test density associated with highly developed demipyramid regarding test diameter and height were preferentially observed in intertidal areas, remoteness from treatment plants and in south-oriented geological layers. High test hemispherical index and demipyramid elongation index were preferentially found far away from treatment plants. Results contribute to improving knowledge on pressure impact assessment and on state of the environment conservation in a defined area. It may also be useful to propose management measures on an appropriate scale for a species that is usually managed on a regional basis. Y1 - 2020/03 PB - Elsevier JF - Regional Studies In Marine Science SN - 2352-4855 VL - 35 ID - 72402 ER -