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Auteur Espinosa, F.; Rivera-Ingraham, G.A.
Titre Subcellular evidences of redox imbalance in well-established populations of an endangered limpet. Reasons for alarm? Type Article scientifique
Année 2016 Publication Revue Abrégée Mar. Pollut. Bull.
Volume 109 Numéro 1 Pages 72-80
Mots-Clés antioxidant enzymes; community structure; Conservation; different environmental-conditions; Heavy metals; heavy-metals; marine-invertebrates; mussel mytilus-edulis; Oxidative stress; oyster crassostrea-virginica; Patella ferruginea; patella-ferruginea gastropoda; Pollution; trace-metals
Résumé Intertidal species are more vulnerable to anthropogenic disturbances than others inhabiting subtidal and offshore habitats. Coastal development frequently results in trace-metal pollution. For endangered species such as Patella ferruginea it can be a high risk that leads local populations to extinction. Three localities were surveyed, one within a natural and unpolluted area and the other two within the harbor of Ceuta (Strait of Gibraltar), on breakwaters outside and inside. The specimens collected inside the harbor reached 3-fold higher Hg content than for those incoming from the natural area. PERMANOVA test indicated that metal composition of the specimens from inside the harbor was different from the rest. In addition, evidence of cell damage was detected in the specimens from the harbor area. This highlights the urgency of undertaking a physiological evaluation of some of the most vulnerable populations, establishing eco-physiological protocols for monitoring and managing populations settled on artificial substrata. (C) 2016 Elsevier Ltd. All rights reserved.
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Auteur institutionnel Thèse
Editeur Lieu de Publication Éditeur
Langue English Langue du Résumé Titre Original
Éditeur de collection Titre de collection Titre de collection Abrégé
Volume de collection Numéro de collection Edition
ISSN 0025-326x ISBN Médium
Région Expédition Conférence
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Numéro d'Appel MARBEC @ alain.herve @ collection 1635
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Auteur Espinosa, F.; Rivera-Ingraham, G.A.
Titre Biological Conservation of Giant Limpets: The Implications of Large Size Type Chapitre de livre
Année 2017 Publication Revue Abrégée
Volume Numéro Pages 105-155
Mots-Clés cymbula-nigra gastropoda; endangered limpet; lottia-gigantea; marine protected areas; mussel mytilus-galloprovincialis; patella-ferruginea gastropoda; population-structure; scutellastra-argenvillei; sex-change; south-african limpet
Résumé Patellogastropods, also known as true limpets, are distributed throughout the world and constitute key species in coastal ecosystems. Some limpet species achieve remarkable sizes, which in the most extreme cases can surpass 35 cm in shell length. In this review, we focus on giant limpets, which are defined as those with a maximum shell size surpassing 10 cm. According to the scientific literature, there are a total of 14 species across five genera that reach these larger sizes. Four of these species are threatened or in danger of extinction. Inhabiting the intertidal zones, limpets are frequently affected by anthropogenic impacts, namely collection by humans, pollution and habitat fragmentation. In the case of larger species, their conspicuous size has made them especially prone to human collection since prehistoric times. Size is not phylogeny-dependent among giant limpets, but is instead related to behavioural traits instead. Larger-sized species tend to be nonmigratory and territorial compared to those that are smaller. Collection by humans has been cited as the main cause behind the decline and/or extinction of giant limpet populations. Their conspicuously large size makes them the preferred target of human collection. Because they are protandric species, selectively eliminating larger specimens of a given population seriously compromises their viability and has led to local extinction events in some cases. Additionally, sustained collection over time may lead to microevolutionary responses that result in genetic changes. The growing presence of artificial structures in coastal ecosystems may cause population fragmentation and isolation, limiting the genetic flow and dispersion capacity of many limpet species. However, when they are necessitated, artificial structures could be managed to establish marine artificial microreserves and contribute to the conservation of giant limpet species that naturally settle on them.
Adresse
Auteur institutionnel Thèse
Editeur Elsevier Academic Press Inc Lieu de Publication San Diego Éditeur Curry, B.E.
Langue English Langue du Résumé Titre Original
Éditeur de collection Titre de collection Titre de collection Abrégé Advances in Marine Biology, Vol 76
Volume de collection 76 Numéro de collection Edition
ISSN ISBN 978-0-12-812402-4 978-0-12-812401-7 Médium
Région Expédition Conférence
Notes Approuvé pas de
Numéro d'Appel MARBEC @ alain.herve @ collection 2180
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