Sea Cucumbers Resource Stock Assessments

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Presentation transcript:

Sea Cucumbers Resource Stock Assessments Resource and Habitat Surveys/assessments Data Reporting Training Ecosystem and habitats Information to Managers Sustainable management of the fishery

Sea Cucumbers Resource Stock Assessments

Sea Cucumbers Stock Assessment Methods Stock Assessments In Situ Evaluate current species numbers, size and age Broad and fine scale activities All habitats Manta tows Line transects Timed swims SCUBA transects Day and Night (burrowing, nocturnal)

Sea Cucumbers Stock Assessments Incorporate abiotic and biotic factors Habitat (reef slope, lagoons sea grass beds etc), water depth, substrate types, dominate benthic forms (coral, sea grasses, sand, rubble etc), etc GPS coordinates for start and finish of all activities (to allow duplication) Length and weight measurements They should include species parameters Species, morphological (body length, weight), location (GPS), water depth, habitat

Assessment Distribution

Manta Tows

Manta tow

Reef Substrate Transects

Line transect & quadrant

Line transect - shallow

Timed Swims- Free diving

SCUBA Timed Swims/Transects

Sea Cucumbers Stock Assessments Social Data (Numbers of fisherman involved, village names, areas fished etc) Fishing gear used (snorkeling, SCUBA, dredging) Catch per unit effort data Location of fishing grounds Processing techniques Reporting species and numbers caught (possible size of individuals

Field data recording (Actinopyga lecanora)

Survey Design Example