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| Chassot, Emmanuel; Sabarros, Philippe; Maufroy, A; Ruiz, J; Ramos, Ml; Barreau, E; Barde, Julien. |
| Observations of turtles in the open-ocean are essential to complement the information collected at nesting sites and rookeries, especially during the ‘lost years’ of their surface-pelagic juvenile phase. We used a large dataset of observations at sea collected onboard Seychelles, Spanish and French purse seiners over the period 2003-2019 to describe the occurrence of five species of turtles in the Western Indian Ocean: green ( Chelonia mydas ), loggerhead ( Caretta caretta ), leatherback ( Dermochelys coriacea ), Olive ridley ( Lepidochelys olivacea ) and hawksbill ( Eretmochelys imbricata ). A total of 895 turtles were recorded by human observers, 487 turtles after having been caught in the purse seine and hauled onboard the vessels and 408 turtles... |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00599/71131/69446.pdf |
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| Clavareau, Lyndsay; Sabarros, Philippe; Escalle, Lauriane; Bach, Pascal; Abascal, Francisco J.; Lopez, Jon; Murua, Hilario; Pascual Alayon, Pedro J.; Ramos, Maria Lourdes; Ruiz, Jon; Mérigot, Bastien. |
| Despite bycatch of elasmobranch (sharks and rays) being a major concern in most fisheries worldwide, there is a lack of knowledge on their spatio-temporal species distribution, biology (life stage and sex-ratios), as well as their at-haulback mortality rate. Observer data from the French and Spanish tropical purse-seine tuna fisheries operating in the Eastern Atlantic and Western Indian Oceans between 2005 and 2017 were analysed to investigate elasmobranch bycatch. Data included 24 elasmobranchs species and distribution patterns of catch per unit of effort (CPUE) by species and sex-ratio were found to vary with life stages, areas, seasons and fishing modes. In general, higher catches were found in FAD-associated sets (>40%) than free tuna school sets... |
| Tipo: Text |
Palavras-chave: Biodiversity; Spatio-temporal distribution; Life stage; Sex ratio; At-haulback mortality. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00642/75386/76177.pdf |
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| Dhellemmes, F.; Hansen, M. J.; Bouet, S. D.; Videler, J. J.; Domenici, P.; Steffensen, J. F.; Hildebrandt, T.; Fritsch, G.; Bach, Pascal; Sabarros, Philippe; Krüger, A.; Kurvers, R. H. J. M.; Krause, J.. |
| Billfishes are well known for their distinctive elongated rostra, i.e. bills. The functional significance of billfish rostra has been frequently discussed and the recent discovery of an oil gland (glandula oleofera) at the base of the rostrum in swordfish, Xiphias gladius, has added an interesting facet to this discussion regarding the potential co-evolution of gland and rostra. Here, we investigated the oil gland and oil pores (through which the oil is brought to the skin surface) of four billfish species – swordfish, Atlantic blue marlin (Makaira nigricans), Indo-Pacific sailfish (Istiophorus platypterus) and striped marlin (Kajikia audax) – and provide detailed evidence for the presence of an oil gland in the last three. All four species had a high... |
| Tipo: Text |
Palavras-chave: Comparative method; Functional morphology; Rostrum; Glandula oleofera; Rete lubricans; Fatty acids; Co-evolution. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00656/76805/77973.pdf |
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| Mannocci, Laura; Forget, Fabien; Travassos Tolotti, Mariana; Bach, Pascal; Bez, Nicolas; Demarcq, Herve; Kaplan, David; Sabarros, Philippe; Simier, Monique; Capello, Manuela; Dagorn, Laurent. |
| Fisheries observer programs represent the most reliable way to collect data on fisheries bycatch. However, their limited coverage leads to important data gaps that preclude bycatch mitigation at the basin scale. Habitat models developed from available fisheries observer programs offer a potential solution to fill these data gaps. We focus on tropical tuna purse seine fisheries (TTPSF) that span across the tropics and extensively rely on floating objects (FOBs) for catching tuna schools, leading to the bycatch of other species associated with these objects. Bycatch under floating objects is dominated by five species, including the vulnerable silky shark Carcharhinus falciformis and four bony fishes (oceanic triggerfish Canthidermis maculata, rainbow runner... |
| Tipo: Text |
Palavras-chave: Bycatch; Habitat modelling; Hotspots; Fisheries observer programs; Geographical extrapolation; Tropical oceans. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00662/77385/78986.pdf |
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| Chavance, Pierre; Chassot, Emmanuel; Bourjea, Jerome; Evano, Hugues; Huet, Jerome; Bach, Pascal; Sabarros, Philippe. |
| Pour ce qui concerne la France (excluant Mayotte), trois flottilles ont des activités de pêche thonière dans l'océan Indien : - les senneurs opérant pour l’essentiel à partir des Seychelles et de l’Ile Maurice, - les palangriers basés à La Réunion, et à un moindre degré la petite pêche réunionnaise. - La flottille thonière française à la senne exerçant dans l’océan Indien atteint 8 navires en 2013 et ses capture se sont élevées à 39 958 tonnes, soit un niveau légèrement supérieur à celui de 2012 (37 155 t) avec une légère augmentation de l’effort de pêche (2 291 jours de pêche en 2013 et 1 944 jours en 2012). Le programme observateur mis en place depuis 2005, qui a permis de fournir les premières évaluations des rejets et des prises accessoires en 2008, a... |
| Tipo: Text |
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| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00239/35015/33552.pdf |
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