| Enregistrements |
Auteur  |
Escalle, L.; Pennino, M.G.; Gaertner, D.; Chavance, P.; Delgado de Molina, A.; Demarcq, H.; Romanov, E.; Mérigot, B. |
| Titre |
Environmental factors and megafauna spatio-temporal co-occurrence with purse-seine fisheries |
Type |
Article scientifique |
| Année |
2016 |
Publication |
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Revue Abrégée |
Fish. Oceanogr. |
| Volume |
25 |
Numéro |
4 |
Pages |
433-447 |
| Mots-Clés |
cetaceans; Eastern Atlantic Ocean; generalized additive models-boosted regression trees; marine conservation; purse-seine fishery; residual autocovariate; Western Indian Ocean; whale sharks |
| Résumé |
Tropical tuna purse-seine fisheries spatially co-occur with various megafauna species, such as whale sharks, dolphins and baleen whales in all oceans of the world. Here, we analyzed a 10-year (2002–2011) dataset from logbooks of European tropical tuna purse-seine vessels operating in the tropical Eastern Atlantic and Western Indian Oceans, with the aim of identifying the principle environmental variables under which such co-occurrence appear. We applied a Delta-model approach using Generalized Additive Models (GAM) and Boosted Regression Trees (BRT) models, accounting for spatial autocorrelation using a contiguity matrix based on a residuals autocovariate (RAC) approach. The variables that contributed most in the models were chlorophyll-a concentration in the Atlantic Ocean, as well as depth and monsoon in the Indian Ocean. High co-occurrence between whale sharks, baleen whales and tuna purse-seine fisheries were mostly observed in productive areas during particular seasons. In light of the lack of a full coverage scientific observer on board program, the large, long-term dataset obtained from logbooks of tuna purse-seine vessels is highly important for identifying seasonal and spatial co-occurrence between the distribution of fisheries and megafauna, and the underlying environmental variables. This study can help to design conservation management measures for megafauna species within the framework of spatial fishery management strategies. |
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Lieu de Publication |
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Éditeur |
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| Langue |
en |
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Titre Original |
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Titre de collection |
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Titre de collection Abrégé |
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Numéro de collection |
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Edition |
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| ISSN |
1365-2419 |
ISBN |
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Approuvé |
pas de |
| Numéro d'Appel |
MARBEC @ isabelle.vidal-ayouba @ |
collection |
1587 |
| Lien permanent pour cet enregistrement |
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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 |
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Revue Abrégée |
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| Volume |
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Numéro |
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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. |
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| Auteur institutionnel |
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Thèse |
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| Editeur |
Elsevier Academic Press Inc |
Lieu de Publication |
San Diego |
Éditeur |
Curry, B.E. |
| Langue |
English |
Langue du Résumé |
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Titre Original |
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Titre de collection |
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Titre de collection Abrégé |
Advances in Marine Biology, Vol 76 |
| Volume de collection |
76 |
Numéro de collection |
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Edition |
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| ISSN |
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ISBN |
978-0-12-812402-4 978-0-12-812401-7 |
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Approuvé |
pas de |
| Numéro d'Appel |
MARBEC @ alain.herve @ |
collection |
2180 |
| Lien permanent pour cet enregistrement |
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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 |
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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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Éditeur |
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| Langue |
English |
Langue du Résumé |
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Titre Original |
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Titre de collection |
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Titre de collection Abrégé |
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Numéro de collection |
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Edition |
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| ISSN |
0025-326x |
ISBN |
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Expédition |
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Approuvé |
pas de |
| Numéro d'Appel |
MARBEC @ alain.herve @ |
collection |
1635 |
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| Auteur |
Evans, S.M.; McKenna, C.; Simpson, S.D.; Tournois, J.; Genner, M.J. |
| Titre |
Patterns of species range evolution in Indo-Pacific reef assemblages reveal the Coral Triangle as a net source of transoceanic diversity |
Type |
Article scientifique |
| Année |
2016 |
Publication |
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Revue Abrégée |
Biol. Lett. |
| Volume |
12 |
Numéro |
6 |
Pages |
20160090 |
| Mots-Clés |
Bayesian skyline plot; biogeography; climate change; coral reef; fishes global patterns; marine biodiversity; ocean; phylogeography; refugia; species distributions |
| Résumé |
The Coral Triangle in the Indo-Pacific is a region renowned for exceptional marine biodiversity. The area could have acted as a 'centre of origin' where speciation has been prolific or a 'centre of survival' by providing refuge during major environmental shifts such as sea-level changes. The region could also have acted as a 'centre of accumulation' for species with origins outside of the Coral Triangle, owing to it being at a central position between the Indian and Pacific oceans. Here, we investigated support for these hypotheses using population-level DNA sequence-based reconstructions of the range evolution of 45 species (314 populations) of Indo-Pacific reef-associated organisms. Our results show that populations undergoing the most ancient establishment were significantly more likely to be closer to the centre of the Coral Triangle than to peripheral locations. The data are consistent with the Coral Triangle being a net source of coral-reef biodiversity for the Indo-Pacific region, suggesting that the region has acted primarily as a centre of survival, a centre of origin or both. These results provide evidence of how a key location can influence the large-scale distributions of biodiversity over evolutionary timescales. |
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Lieu de Publication |
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Éditeur |
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English |
Langue du Résumé |
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Titre Original |
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Titre de collection |
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Numéro de collection |
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Edition |
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| ISSN |
1744-9561 |
ISBN |
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Approuvé |
pas de |
| Numéro d'Appel |
MARBEC @ alain.herve @ |
collection |
1694 |
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| Auteur |
FROMENTIN, J.-M.; LOPUSZANSKI, D. |
| Titre |
Migration, residency, and homing of bluefin tuna in the western Mediterranean Sea |
Type |
Article scientifique |
| Année |
2014 |
Publication |
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Revue Abrégée |
ICES Journal of Marine Science |
| Volume |
71 |
Numéro |
3 |
Pages |
510-518 |
| Mots-Clés |
feeding area; front; marine protected area; pop-up archival tag; Spatial distribution; Thunnus thynnus |
| Résumé |
This study presents the results of an electronic tagging programme on mature Atlantic bluefin tuna (ABFT) that has been conducted since 2007 offshore of the French Mediterranean Coast. The spatial distributions of ABFT showed little year-to-year variation and the fish concentrated in a small area of the central northwestern Mediterranean, where they may stay for several months. The individual tracks display sinuous trajectories in this area, indicating the possibility of feeding behaviour. No fish went out to the North Atlantic, but several fish displayed some migration to the southern western Mediterranean Sea during winter and the central Mediterranean during the spawning season. The homing behaviour of one fish after a full year as well as the back and forth of several fish further indicates that this restricted feeding area is probably persistent from year to year. We hypothesize that this area could result from local enrichment due to permanent mesoscale oceanographic features related to the North Mediterranean Current and the North Balearic front. The option of a spatial management, through marine protected areas, for a highly migratory species, such as ABFT, thus deserves more careful consideration because those species displayed complex spatial dynamics (e.g. homing), and population structure (e.g. several subpopulations of different sizes). |
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Titre de collection |
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Titre de collection Abrégé |
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Numéro de collection |
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Edition |
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| ISSN |
1054-3139 |
ISBN |
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| Notes |
The following values have no corresponding Zotero field:<br/>Author Address: IFREMER, UMR 212 EME, Avenue Jean Monnet, BP 171, 34203 Se`te, France<br/>Author Address: BGFCF, (Big Game Fishing Club France), Carry le Rouet 13620, France<br/>PB – Oxford university press<br/> |
Approuvé |
pas de |
| Numéro d'Appel |
LL @ pixluser @ |
collection |
339 |
| Lien permanent pour cet enregistrement |
