@article{fdi:010064021, title = {{C}etaceans and tuna purse seine fisheries in the {A}tlantic and {I}ndian {O}ceans : interactions but few mortalities}, author = {{E}scalle, {L}. and {C}apietto, {A}. and {C}havance, {P}ierre and {D}ubroca, {L}. and {D}e {M}olina, {A}. {D}. and {M}urua, {H}. and {G}aertner, {D}aniel and {R}omanov, {E}. and {S}pitz, {J}. and {K}iszka, {J}. {J}. and {F}loch, {L}aurent and {D}amiano, {A}lain and {M}erigot, {B}.}, editor = {}, language = {{ENG}}, abstract = {{F}isheries bycatch is considered to be one of the most significant causes of mortality for many marine species, including vulnerable megafauna. {I}n the open ocean, tuna purse seiners are known to use several cetacean species to detect tuna schools. {T}his exposes the cetaceans to encirclement which can lead to incidental injury or death. {W}hile interactions between fishers and cetaceans have been well documented in the eastern tropical {P}acific {O}cean, little is known about these interactions and potential mortalities in the tropical {A}tlantic and {I}ndian {O}ceans. {H}ere, we provide the first quantification of these interactions in both oceans by analyzing a large database of captain's logbooks (1980 to 2011) and observations collected by onboard scientific observers (1995 to 2011). {D}istribution maps of sightings per unit effort highlighted main areas of relatively high co-occurrence: east of the {S}eychelles ({D}ecember to {M}arch), the {M}ozambique {C}hannel ({A}pril to {M}ay) and the offshore waters of {G}abon ({A}pril to {S}eptember). {T}he percentage of cetacean-associated fishing sets was around 3% in both oceans and datasets whereas 0.6% of sets had cetaceans encircled. {O}f the 194 cetaceans encircled in a purse seine net (122 baleen whales, 72 delphinids), immediate apparent survival rates were high ({A}tlantic: 92%, {I}ndian: 100%). {A}mong recorded mortalities, 8 involved pantropical spotted dolphins {S}tenella attenuata and 3 involved humpback whales {M}egaptera novaeangliae. {T}hese high survival rates suggest that setting nets close to cetaceans has a low immediate apparent impact on the species involved. {O}ur findings will contribute to the development of an ecosystem approach to managing fisheries and accurate cetacean conservation measures.}, keywords = {{A}pparent survival ; {B}ycatch ; {M}arine mammals ; {F}ishery impact ; {M}arine conservation ; {M}egafauna ; {ATLANTIQUE} ; {OCEAN} {INDIEN}}, booktitle = {}, journal = {{M}arine {E}cology {P}rogress {S}eries}, volume = {522}, numero = {}, pages = {255--268}, ISSN = {0171-8630}, year = {2015}, DOI = {10.3354/meps11149}, URL = {https://www.documentation.ird.fr/hor/fdi:010064021}, }