Keanekaragaman dan Kemelimpahan Nudibranchia di Perairan Tulamben, Bali

Abstract

Nudibranchia is the largest order of Opistobranchia which is known to have about 3,000 species. Nudibranchia is a popular macro photography object among divers. Although Tulamben Waters, Bali is one of popular destination for macrobiota’s habitat, but research on marine biota, especially nudibranchia in these waters is still very rare. This study uses two methods, which is direct observation to reveal diversity and species number, belt transect methods to estimate density or abundance per sampling area using diving techniques . A transect line of 50 m at each point of observation site was used to evaluate abundance. This study wants to see the level of diversity, mapping various species and abundance of nudibranchia. For biodiversity, 31 species from 15 families are found, Chromodoridae, Dorididae, Elysiidae, Facelinidae, Flabellinidae, Goniodorididae, Halgerdidae, Hexabranchidae, Phyllidiidae Polyceridae, Hydatinidae, Costasiellidae, Elysiidae and Limapontiidae. Whereas the transect method found 12 species from 6 families, Chromodoridae, Facelinidae, Phyllidiidae Aglajidae, Costasiellidae, and Elysiidae. With a diversity index of 2.27 and the highest level of abundance found in Pteraeolidia ianthina species with a relative abundance of 0.19%.

Keanekaragaman dan Kelimpahan Nudibranch di Pantai Penimbangan Buleleng Bali

“…Perairan Tulamben ditemukan 31 spesies dari 15 famili yaitu Chromodoridae, Dorididae, Elysiidae, Facelinidae, Flabellinidae, Goniodorididae, Halgerdidae, Hexabranchidae, Phyllidiidae Polyceridae, Unidentiidae, Hydatinidae, Costasiellidae, Elysiidae, dan Limapontiidae. Sedangkan dengan metode transek didapatkan 12 spesies yang terdiri dari 6 famili yaitu Chromodoridae, Facelinidae, Phyllidiidae Aglajidae, Costasiellidae dan Elysiidae (Marchel et al, 2021); 2. Perairan Pesisir Jepara tergolong ke dalam 4 famili dari mana 6 spesies diidentifikasi.…”

“…Hal ini menunjukkan komunitas perairan disusun oleh banyak jenis nudibranch. Pembanding tentang indeks keanekaragaman di kondisi yang hampir mirip adalah indeks keanekaragaman di Perairan Tulamben sebesar 2,27 dari 31 jenis dan tingkat kemelimpahan tertinggi didapatkan pada spesies Pteraeolidia ianthina dengan kelimpahan relatif sebesar 0,19% (Marchel, et al, 2021).…”

Distribution Nudibranch and Carnivorous Fish in The North Bali Sea

“…The destruction of the coral community will directly affect the animals associated with it, for example, in the fish area (Muniaha et al, 2017). Nudibranchs are mollusks of the subclass Opisthobranchs and are unique organisms to study among other invertebrates (Marchel et al, 2021). Many nudibranchs of the suborder Doridinana, i.e., the family Phyllidiae known as Phyllidia nudibranchs, have a global distribution, which is found in warm and tropical waters of the Indo-Pacific region (Gosliner et al, 2018).…”