@article{fdi:010096932,
  title = {{P}redicting interactions of sperm and killer whales with longline fisheries in the {S}outhern {O}cean : a spatiotemporal modelling approach for conflict mitigation in the {C}rozet and {K}erguelen {A}rchipelagos},
  author = {{M}ollier, {M}argaux and {G}uinet, {C}. and {P}{\'e}ron, {C}. and {M}assiot-{G}ranier, {F}. and {G}asco, {N}. and {C}hazeau, {C}. and {D}erville, {S}ol{\`e}ne and {W}ilson, {E}. and {C}orney, {S}. and {R}obert, {V}. and {M}az{\'e}-{L}ambrechts, {C}. and {T}ixier, {P}aul},
  editor = {},
  language = {{ENG}},
  abstract = {{T}oothed whale depredation of fish caught on fishing gear raises socioeconomic and conservation concerns. {I}t can lead to substantial losses for fishers and impacts on depredating species, but effective solutions remain limited. {I}n this study, we implemented a spatiotemporal modelling approach to predict depredation occurrence and intensity, based on natural distribution of predators involved and fishing practices, to support mitigation strategies. {U}sing 11 years of data from the {P}atagonian toothfish ({D}issostichus eleginoides) longline fisheries operating around {C}rozet and {K}erguelen islands, and generalized additive models ({GAM}s), we assessed the environmental and operational factors influencing catch depredation by sperm whales ({P}hyseter macrocephalus) and two killer whale ({O}rcinus orca) ecotypes: {C}rozet and {T}ype-{D}. {A}ll models indicated strong seasonal patterns in depredation, particularly for sperm whales, whose presence decreased in winter and was primarily driven by high abundance of large toothfish. {C}rozet-type killer whales were associated with shallow, low-slope areas near the continental shelf, whereas {T}ype-{D} killer whales were more frequent in deeper waters and near seamounts, suggesting a more offshore distribution. {L}onger soak times and line lengths increased killer whale depredation, likely by increasing catch accessibility. {C}rucially, vessels that moved more than 70 km after a depredation event significantly reduced the likelihood of further interactions with both predator species. {T}he results indicate spatial overlap between fishing grounds and whale-preferred habitats, but highlight clear depredation hotspots within that overlap. {A}voiding these areas provides fishers and managers with easy-to-implement, cost-effective options for mitigating depredation while maintaining the socio-economic viability of the activity.},
  keywords = {{H}uman-wildlife interaction ; depredation mitigation ; large marine predators ; predictive modelling ; fisheries management ; {S}outhern {O}cean ; {OCEAN} {ANTARCTIQUE} ; {CROZET} ; {KERGUELEN}},
  booktitle = {},
  journal = {{B}iodiversity and {C}onservation},
  volume = {35},
  numero = {4},
  pages = {118 [34 p.]},
  ISSN = {0960-3115},
  year = {2026},
  DOI = {10.1007/s10531-026-03312-0},
  URL = {https://www.documentation.ird.fr/hor/fdi:010096932},
}