@article{fdi:010057232,
  title = {{V}ideo{S}olo, an autonomous video system for high-frequency monitoring of aquatic biota, applied to coral reef fishes in the {G}lorioso {I}slands (swio)},
  author = {{C}habanet, {P}ascale and {L}oiseau, {N}icolas and {J}oin, {J}. {L}. and {P}onton, {D}ominique},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he objectives of this paper are (1) to present {V}ideo{S}olo, a new autonomous video system; and (2) to show its relevance through the analysis of temporal variability of fish populations at different temporal scales of years, days and hours. {T}he underwater video system {V}ideo{S}olo, designed for use in remote places, combines advantages in comparison to older systems necessitating the presence of a ship and whose autonomy is generally limited in time due to biofouling. {A}ll these issues have been resolved in {V}ideo{S}olo, a fully autonomous long-term system, programmable, easy to set up and deploy (the housing weighs only 3 kg). {I}t has sufficient energy storage and an anti-biofouling system in the form of its hydro-wiper, enabling continuous operation for up to one month. {T}he experiment was conducted in a remote place ({G}lorioso {I}sland, {SW} {I}ndian {O}cean) where the system was installed in front of the same coral colony (1 m(2)) at a depth of 8 m. {D}ata was recorded in {M}ay for two subsequent years and six times per day (between 6 am and 4 pm). {T}he analysis of the video sequences enabled the recording of 6224 individuals of 75 species belonging to 16 families over 41 days of experiment. {A}t a small spatial scale, fish assemblages were variable over time at the three temporal scales studied. {T}he number of individuals and species observed was variable between years whilst the number of individuals observed per day remained relatively stable through time. {W}hen occurrences were considered, less variation was observed between years. {A}nalyses of temporal fish variability on the most abundant families revealed that the abundances of {A}canthuridae, {L}abridae, {S}caridae and resident {P}omacentridae were significantly different between years and inversely so for the non-resident {P}omacentridae. {W}hen the diurnal variations of fish assemblages were considered, the abundances differed significantly over time for {A}canthuridae, higher in the morning (6 am and 9 am), and for {S}caridae, higher at sunrise (6 am) and sunset (4 pm). {T}he abundances of {P}omacentridae and {L}abridae were stable from sunrise to sunset. {T}he variability between years could be linked to events such as recruitment whilst daily variations could be more related to the effects of tidal cycles whose effects may have created periodic feeding opportunities. {V}ideo{S}olo has demonstrated its efficiency and has remarkable potential in the field of aquatic biology in any location, as no human presence is required for it to work.},
  keywords = {{A}canthuridae ; {A}utonomous video system ; {C}oral reef fish ; {D}aily variation ; {M}onitoring ; {S}caridae},
  booktitle = {},
  journal = {{J}ournal of {E}xperimental {M}arine {B}iology and {E}cology},
  volume = {430},
  numero = {},
  pages = {10--16},
  ISSN = {0022-0981},
  year = {2012},
  DOI = {10.1016/j.jembe.2012.06.024},
  URL = {https://www.documentation.ird.fr/hor/fdi:010057232},
}