@article{PAR00000006,
  title = {{D}iel vertical behaviour, predator-prey relationships, and occupation of space by jack mackerel ({T}rachurus murphyi) off {C}hile},
  author = {{B}ertrand, {A}. and {B}arbieri, {M}. {A}. and {C}ordova, {J}. and {H}ernandez, {C}. and {G}omez, {F}. and {L}eiva, {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n the southeastern {P}acific, jack mackerel ({T}rachurus murpkvi, {C}arangidae) is a heavily exploited pelagic species, and its presence in {C}hilean waters in autumn and winter is assumed to be mainly due to an inshore feeding migration. {P}redator-prey relationships are known to depend on the spatial and temporal scale of observation, but they can also be strongly affected by factors such as diel vertical migration. {I}n studying the case of jack mackerel in detail, we used data from three acoustic surveys carried out in central {C}hile in 1997, 1998, and 1999. {I}n terms of spatial occupation,jack mackerel behaviour is "atypical" behaviour, i.e. more aggregated during the night than during the day. {T}he patterns we observed can be related to their nocturnal active foraging behaviour. {D}iet feeding behaviour is therefore a key factor in the aggregating behaviour of jack mackerel and its vulnerability to the purse-seine fishery that targets these nocturnal aggregations. {T}his particular fish die] feeding behaviour also affected predator-prey relationships in relation to the spatial scale. {P}ositive correlations at a "small" spatial scale (< 7-25 km) were observed during the night when jack mackerel foraged, but not during the day. {F}inally, we show that prey biomass was lower where jack mackerel were abundant, which could indicate a jack mackerel top-down control on prey communities. ({C}) 2004 {I}nternational {C}ouncil forthe {E}xploration of the {S}ea. {P}ublished by{E}lsevier{L}td. {A}ll rights reserved.},
  keywords = {aggregating behaviour ; jack mackerel ; predator prey relationships ; spatial patterns ; vertical diel behaviour},
  booktitle = {},
  journal = {{I}ces {J}ournal of {M}arine {S}cience},
  volume = {61},
  numero = {7},
  pages = {1105--1112},
  ISSN = {1054-3139},
  year = {2004},
  DOI = {10.1016/j.icesjms.2004.06.010},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00000006},
}