@article{fdi:010053137,
  title = {{C}omparison of visual census and high definition video transects for monitoring coral reef fish assemblages},
  author = {{P}elletier, {D}ominique and {L}eleu, {K}{\'e}vin and {M}ou-{T}ham, {G}{\'e}rard and {G}uillemot, {N}icolas and {C}habanet, {P}ascale},
  editor = {},
  language = {{ENG}},
  abstract = {{M}onitoring fish and underwater habitats, particularly in and around marine protected areas ({MPA}s) requires non-destructive observation methods. {T}his is generally achieved by divers conducting underwater visual censuses ({UVC}), but video-based techniques are now being used more often to observe underwater macrofauna and habitats. {A} comparison of these two techniques is relevant with the development of high-definition ({HD}) video, which constitutes a substantial improvement over previously available video resolutions at limited extra cost. {W}e conducted a paired observation experiment involving both {HD} video and {UVC} in an {MPA} located in the {N}ew {C}aledonian lagoon, which is a highly diversified coral reef ecosystem. {W}e compared three techniques for counting fish along 50 m x 4 m delineated strip transects: {UVC} and two video techniques in which the diver used either a straight trajectory ({I}-type transect) or a browsing one ({S}-type transect). {T}he results showed that the proportion of fish that were not identified up to the species level did not exceed 3.3% in video observations versus 1.7% in {UVC}. {T}he abundance and species richness were larger in {UVC} than in videos, and {S}-type transects detected more individuals and species than {I}-type transects. {T}he average abundance and species richness observed by {UVC} were 1094 individuals and 69.7 species per transect respectively. {I}n comparison with {UVC}. {I}-type and {S}-type video transects detected on average 56% and 61% of the abundance and 85% and 77% of the species richness seen by {UVC} respectively. {O}ur results showed that, in comparison to {UVC} data recorded in situ, the post field analysis of {HD} video images provided representative observations of fish abundance and species diversity, although fewer species and individuals were detected. {T}he advantages and shortcomings of each observation technique for monitoring fish assemblages, particularly in an {MPA} are discussed. {HD} video appears to be a cost-effective technique in terms of the human resources and time needed for field implementation. {O}verall, this study suggests that {HD} video-based techniques constitute an interesting complement to {UVC}, or an alternative when these cannot be implemented.},
  keywords = {{F}ish assemblages ; {MPA} monitoring ; {H}igh-definition underwater video ; {U}nderwater visual censuses ({UVC}) ; {C}oral reefs},
  booktitle = {},
  journal = {{F}isheries {R}esearch},
  volume = {107},
  numero = {1-3},
  pages = {84--93},
  ISSN = {0165-7836},
  year = {2011},
  DOI = {10.1016/j.fishres.2010.10.011},
  URL = {https://www.documentation.ird.fr/hor/fdi:010053137},
}