@article{fdi:010064696,
  title = {{E}lectronic monitoring trials on in the tropical tuna purse-seine fishery},
  author = {{R}uiz, {J}. and {B}atty, {A}. and {C}havance, {P}ierre and {M}c{E}lderry, {H}. and {R}estrepo, {V}. and {S}harples, {P}. and {S}antos, {J}. and {U}rtizberea, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he difficulty of ensuring adequate statistical coverage of whole fleets is a challenge for the implementation of observer programmes and may reduce the usefulness of the data they obtain for management purposes. {T}his makes it necessary to find cost-effective alternatives. {E}lectronic monitoring ({EM}) systems are being used in some fisheries as an alternative or a complement to human observers. {T}he objective of this study was to test the use and reliability of {EM} on the tropical tuna purse-seine fishery. {T}o achieve this objective, seven trips of tuna purse seiners operating in the three {O}ceans were closely monitored to compare the information provided by {EM} and on-board observers to determine if {EM} can reliably document fishing effort, set type, tuna catch, and bycatch. {T}otal tuna catch per set was not significantly different between {EM} and observer datasets; however, regarding species composition, only main species matched between {EM} and observers. {S}uccess on set-type identification using {EM} varied between 98.3 and 56.3%, depending on the camera placement. {O}verall, bycatch species were underestimated by {EM}, but large bodied species, such as billfishes, were well documented. {T}he analyses in this study showed that {EM} can be used to determine the fishing effort (number of sets) and total tuna catch as reliably as observers can. {S}et-type identification also had very promising results, but indicated that refinement of the methods is still needed. {T}o be fully comparable with observer data, improvements for accurately estimating the bycatch will need to be developed in the application and use of the {EM} system. {O}perational aspects that need to be improved for an {EM} programme to be implemented include standardizing installation and on-board catch handling methodology as well as improvements in video technology deployment.},
  keywords = {bycatch ; catch composition ; data collection ; electronic monitoring system ; observers ; purse seining ; tropical tuna ; {OCEAN} {INDIEN} ; {ATLANTIQUE} ; {PACIFIQUE} {OUEST}},
  booktitle = {},
  journal = {{I}ces {J}ournal of {M}arine {S}cience},
  volume = {72},
  numero = {4},
  pages = {1201--1213},
  ISSN = {1054-3139},
  year = {2015},
  DOI = {10.1093/icesjms/fsu224},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064696},
}