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Scilly_EN

This atoll has been studied two times by the CRIOBE:

1/ from January 10th to January 28th 1979. This mission was mainly to gather qualitative data. "Cf" the report Anonyme, 1979 – Scilly. Compte rendu préliminaire d’une expédition scientifique interdisciplinaire et interorganismes en janvier 1979. Bull. Ant. Tahiti Mus. Nat. Hist. Nat. et EPHE RA N : 77 pp.

References

GALZIN R., 1979 - Contribution à l'inventaire de la faune ichtyologique de Scilly, Polynésie française. Bull. Ant. Tahiti Mus. Nat. Hist. Nat. et EPHE RA N: 52-54.

GALZIN R., BAGNIS R., BENNETT J., 1983 - Premier inventaire et distribution de la faune ichtyologique de l'atoll de Scilly (Polynésie française). J. Soc. des Océanistes, 39 (77): 17-28.


2/ from November 25th to December 8th 2014.
Scilly Fig2

Satellite image of Scilly with stations marked in red for experimental fishing and underwater visual census in blue


During this second campaign, fish were captured on 18 sites of experimental fishing using anaesthetics and spear gun (maps and table). These fish have been identified and for each species at least one picture and one tissue sample have been taken for genetic analysis ans for C to N ratio in order to evaluate the trophic level of the species.

Underwater visual census has been conducted at each site using files A and B for the fish and C for the substrate.

Underwater visual census has been conducted at each site using files A and B for the fish and C for the substrate

  • the first file is for all species counts by size on a fixed belt transect of 250 m2 (50m x 5m). One file per diver.
  • the second file is for all species counts by size on variable width transects of 50m long. Two divers work together one above, one below and share species by family. The files of both divers are assembled on file B.
  • one diver at the end of the fish census evaluate the substrate using MSA file C on 250 m2 (50m x 5m).


Scilly Fiche

Census file

References Clua E., Legendre P., Vigliola L., Magron F., Kulbicki M., Sarramegna S., Labrosse P., Galzin R., 2006- Medium scale approach (MSA) for improved assessment of coral reef habitat. J. Exp. Mar. Biol. Ecol., 333 : 219-230.


Scilly Fig1

Schematics of Scilly Island with stations marked in red for experimental fishing and underwater visual census in blue (a)


Table 1. Fish capture sites, geographic location, and sampling methods

StationLatitudeLongitudeDepth(m)DayMonthYearMethodReef typesubstrate
SO1-16,527833-154,645231028112014Visual censusOuter slope-
SO1-16,53385-154,6417313-1728112014AnaestheticDrop off -
SL1-16,526833-154,651381028112014Visual censusLagoon reef-
SL1-16,525117-154,6512210-1228112014AnaestheticLagoon drop offCoral head
S02-16,490217-154,71621029112014Visual censusOuter slope-
SO2-16,497208-154,722743-529112014AnaestheticGroove, false pass -
SL2-16,498233-154,709721029112014Visual censusLagoon reefCoral head
SL2-16,49425-154,7031529112014AnaestheticLagoon drop offCoral head
SL3-16,5789-154,711221030112014Visual censusLagoon reefCoral head
SL3-16,580751-154,7165130112014AnaestheticBeach rock-
SL4-16,553517-154,62577730112014Visual censusLagoon reefCoral head
SL4-16,561583-154,6247315-20 30112014AnaestheticCoral head-
SO3-16,563583 -154,7331101122014Visual censusDrop off-
S03-16,560533-154,7329325-301122014AnaestheticDrop off -
SO4-16,593933 -154,65933111122014Visual censusDrop off-
SO4-16,59325-154,66353 15-181122014AnaestheticSpur beginning of slope-
References Galzin R., Blay C., Falliex E., Letourneur Y., Moritz C., Parravicini V., Planes S., Sasal P., Siu G., Tanret D., Tolou N., Vigliola L., Williams J., 2015 - Biodiversité ichtyologique de la Polynésie française. Rapport Polychthyos, Ministère de l'Ecologie et du Développement Durable, Paris, RA 217 CRIOBE: 60 pages et 4 annexes.

Calendar

1)  2017-08-21
Cook Islands
2)  2017-08-28
Série Galzin
3)  2017-09-11
Samoa
4)  2017-10-16
Tonga