Abstract:
This research aims to explore the community structure and density of sea cucumbers
(Holothuroidea) in the tropical waters of Abang Island, Batam. The methodology
employed involves field surveys using a transect-quadrant technique for the collection of
data on species, density, and environmental parameters such as temperature, salinity,
pH, and dissolved oxygen. The results indicate that the species composition is dominated
by Holothuria leucospilota at Station 1 and Holothuria fuscocinerea at Station 2. The
highest density for Holothuria leucospilota was recorded at 0.130 individuals/m² at
Station 1, while Holothuria fuscocinerea reached a density of 0.150 individuals/m². The
highest diversity index value was found at Station 1 (H' = 1.07), whereas the highest
dominance was recorded at Station 2 (D = 0.691). Pearson correlation analysis revealed
that salinity and temperature have the most significant relationship with sea cucumber
abundance, varying by station location. These findings suggest that the community
structure of sea cucumbers is heavily influenced by habitat characteristics and
environmental quality.
