Distribution, Density and Identification of Giant Clams in Coastal Area of Negeri Morella (The District of Leihitu, Central Maluku Regency, Indonesia)

Abstract

Giant clams are protected biota both nationally and internationally. The coastal area of Negeri Morella, the District of Leihitu, Central Maluku Regency, Maluku is one of the areas as the habitat of these giant clams. This study aims to identify the types of clams, conduct ecological studies covering density, diversity index of Tridacninae shells in Central Maluku, especially in Negeri Morella. Implementation of the clam population survey is conducted by using UVC (Underwater Visual Census). The results show that ofthe ten (10) samples in the observation station, 91 individuals of giant clams under the type of Tridacna squamosa and Tridacna crocea. The giant clams found in the coastal waters of Negeri Morella has a small size; in the depth of 1-5 m, 87 giant clams were found in various sizes with a length of 2-30 cm, and in the depth of 5-10 m, only four (4) giant clams with a length of 11-30 cm. The population density obtained was 45.5 individuals/ha, the value of Diversity Index (H') was 0.69, the Uniformity Index (E) ranged from 0-1, and the Dominance Index (D) of 0.505.

Pollution level in Domas coastal waters based on some water quality parameters

“…This can also be caused by the unstable nature of nitrites. Nitrite is a transitional form of nitrification (ammonia with nitrate) and denitrification (nitrate with nitrogen gas) and is commonly found at low concentrations (Widyasari et al 2016). However, the results also showed that several stations had high nitrite concentrations.…”

Kepadatan dan Pola Distribusi Tridacna crocea di Perairan Laut Desa Sepempang Kecamatan Bunguran Timur Kabupaten natuna

“…Jenis kima yang paling banyak ditemukan di Perairan Desa Sepempang yaitu T. crocea dengan jumlah 200 individu (Gambar 4) pada stasiun III. Hasil tersebut termasuk tinggi apabila dibandingkan dengan penelitian daerah lain, seperti di perairan Pulau Wawosunggu dengan jumlah 39 individu (Hasni et al, 2017), perairan Amdui Distrik Batanta Selatan sebanyak 78 individu (Wakum et al, 2017), Pesisir Morella sebanyak 41 individu (Widyasari et al, 2017), dan Perairan Singapura sebanyak 31 individu (Neo and Todd, 2012 (Calumpong, 1992).…”