Density and characteristics of Green mussels (Perna viridis) in Percut Sei Tuan coastal, North Sumatra, Indonesia

Abstract

Percut Sei Tuan is a coastal area on the east coast of North Sumatra which has a lot of natural resource potential, one of them which is green mussels (Perna viridis). Green mussels have many benefits, namely for consumption, cultivation and bioindicator. This study aimed to determine the density, habitat location, growth pattern, frequency distribution of green mussels, physical-chemical parameters of water, a substrate of the bottom waters, and the relationship of green clams density to water and substrate parameters. The study was conducted in July-September 2020. Data analysis included density, the relationship of total length and weight of green mussels, the frequency distribution of shell lengths, and Principal Component Analysis (PCA). The results showed that the density of green mussels at stations I, II, and III were 352 ind/m2, 3 ind/m2, and 1 ind/m2, respectively. The relationship between the length and weight of green shells shows that the growth was negative allometric. The water condition, seen from the physical, chemical, and substrate parameters, was still suitable for P. viridis. Water and substrate parameters that were positively related to the density of green mussels were water temperature, nitrate, phosphate, C-organic, percentage of silt and clay. Parameters that were negatively related were salinity, pH, and percentage of sand in the bottom substrate. The present study suggested that Station I was an appropriate area for the growth and reproduction of green mussels.

Vegetation and macrozoobenthos diversity in the Percut Sei Tuan mangrove forest, North Sumatra, Indonesia

“…Percut Sei Tuan is a coastal area located on the East Coast of North Sumatra. As a coastal area includes rivers with several tributaries, the reduced area of mangroves and their damage can also affect the abundance of fauna-especially the macrozoobenthos in the area (Susetya et al 2021). The aim of the present study was to determine the diversity of vegetation and macrozoobenthos in the mangroves of Percut Sei Tuan, North Sumatra, Indonesia.…”

The Preferensi habitat kerang lentera (Lingula unguis) di Perairan Nambo, Kota Kendari, Sulawesi Tenggara

“…Apabila suhu naik maka akan mengakibatkan peningkatan aktivitas metabolisme akuatik, sehingga kebutuhan oksigen juga meningkat dan mengakibatkan oksigen terlarut akan rendah sedangkan kerang lentera berkontribusi positif dengan oksigen terlarut (kelompok A). Menurut Susetya et al (2021) ketika suhu air meningkat, itu berarti oksigen terlarut setiap air akan menurun. Kisaran suhu yang diperoleh selama penelitian masih tergolong normal untuk pertumbuhan kerang lentera.…”

Evaluation of the green mussel floating cage related to the enlightenment aspect through the analysis of the Perna viridis spat settlement & population structure

“…After five months of cultivation, the green mussels are harvested and removed from the water column. We took three ropes from the light area and three from the dark zone as samples to analyze the population structure [8]. The assessment of population structure is based on rope segment (the 1st, 2nd, 3rd, and 4th, respectively).…”

“…The reproductive cycle was continuous, with reproductive peaks varying depending on the region of the country. Generally, green mussel populations living in the tropics experience two reproductive extremes: March to April and October to November [8], [10], [11]. Green mussel reproduction peaks in May and August at the Naf River coast, Bangladesh.…”

“…It had the potential to be used as a cultivation area. A study in Kuala Langsa, Aceh Province, found that spat density of 86.25-175.25 individuals per two-meter in June-July [18] while Percut Sei Tuan coastal, North Sumatra, obtained spat density data ranging from 3-352indv/m 2 [8].…”