Dataset: Patterns in the distribution of holothurians across the central Great Barrier Reef


Description

Surveys of the distribution of holothurians were conducted on 2 inshore reefs (Pandora and Phillips), 2 mid-shelf reefs (John Brewer and Rib) and two outer-shelf reefs (Myrmidon and Dip) during September/October 1982. \n \nOn the inshore reefs a single reef zone was examined. For mid-shelf and outer-shelf reefs, three zones were sampled; the outer reef flat, the inner reef flat and the leeward bommies. \n \nSurveys were carried out at night at depths of <10m. Five belt transects (100m x 4m) were surveyed within each reef zone of the mid- and outer-shelf reefs. For the inshore reefs, 10 belt transects were surveyed at Pandora Reef and 5 transects were surveyed at Phillips Reef. All holothuroids within each transect were recorded, as well as the substrate type within each 5m interval along the transect.\n This research was undertaken to determine patterns of distribution of holothurians at scales of whole reefs, zones within reefs and habitats within zones.\n Species identified within belt transects: \nHolothuria atra, Holothuria axiologa, Holothuria coluber, Holothuria difficilis, Holothuria edulis, Holothuria hilla, Holothuria impatiens, Holothuria leucospilota, Holothuria nobilis, Actinopyga lecanora, Actinopyga mauritiana, Actinopyga miliaris, Actinopyga obesa, Actinopyga serratidens, Stichopus chloronotus, Stichopus variegatus, Stichopus sp.1, Stichopus sp.2, Bohadachia argus, Bohadachia graeffei, Bohadachia marmorata, Thelenota anax, Euapta godeffroyi. \n \nAdditional species identified adjacent to belt transects: \nHolothuria fuscocinerea, Holothuria paradalis, Stichopus horrens, Actinopyga echinites, Synaptula maculata, Thelenota ananas.\n

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