@article{fdi:010057230,
  title = {{L}ocal depletion by a fishery can affect seabird foraging},
  author = {{B}ertrand, {S}ophie and {J}oo, {R}. and {S}met, {C}. {A}. and {T}remblay, {Y}ann and {B}arbraud, {C}. and {W}eimerskirch, {H}.},
  editor = {},
  language = {{ENG}},
  abstract = {{L}ong-term demographic studies show that seabird populations may suffer from competition with fisheries. {U}nderstanding this process is critical for the implementation of an ecosystem approach to fisheries management ({EAF}). {E}xisting studies rely mostly on indirect clues: overlaps between seabird foraging and fishing areas, comparing fish catches by seabirds and vessels. {T}he study is based on a {GPS} tracking experiment performed in 2007 on one of the main guano-producing seabird species, the {P}eruvian booby, breeding on an island near the major port for anchovy landings in {P}eru. {T}he fishery, which is entirely monitored by a {V}essel {M}onitoring {S}ystem, opened the day we began the tracking experiment, providing a unique opportunity to examine the day-to-day effects of an intense fishing activity on seabird foraging behaviour. {W}e observed a significant increase in the range of the daily trips and distances of the dives by birds from the colony. {T}his increase was significantly related to the concomitant fishing activity. {S}eabirds progressively became more segregated in space from the vessels. {T}heir increased foraging effort was significantly related to the growing quantity of anchovy removals by the fishery. {I}n addition, daily removals by the fishery were at least 100 times greater than the daily anchovy requirement of the seabird colonies. {W}e conclude that seabirds needed to forage farther to cope with the regional prey depletion created by the intensive fishing behaviour of this open access fishery. {S}ynthesis and applications. {W}e show that the foraging efficiency of breeding seabirds may be significantly affected by not only the global quantity, but also the temporal and spatial patterns of fishery removals. {T}ogether with an ecosystem-based definition of the fishery quota, an {EAF} should limit the risk of local depletion around breeding colonies using, for instance, adaptive marine protected areas.},
  keywords = {competition for prey ; fishery management ; guano-producing seabirds ; {P}eruvian anchovy},
  booktitle = {},
  journal = {{J}ournal of {A}pplied {E}cology},
  volume = {49},
  numero = {5},
  pages = {1168--1177},
  ISSN = {0021-8901},
  year = {2012},
  DOI = {10.1111/j.1365-2664.2012.02190.x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010057230},
}