Laju Penempelan Makrobiofouling pada Keramba Apung di Perairan Tapulaga Kecamatan Soropia Kabupaten Konawe Sulawesi Tenggara

Abstrak

ABSTRACT Biofouling is the attachment and accumulation of living organisms attached to the substrate surface. The existence of biofouling causes harm to the environment. One of the impacts it causes is its presence on cultivation rafts which causes the raft to become damaged or sink. The aim of this research is to analyze the attachment rate of macrobiofouling in floating cages in Tapulaga waters, Soropia district. Sampling was based on 3 (three) criteria for macrobiofouling attachment containers, namely 1) cultivation cages which were placed at 3 different depths, namely 1, 3 and 5 m; 2) Plastic drum; 3) Open cultivation container (net) measuring 100 x 100 x 150 cm. The number of species of macrobiofouling during the research was obtained as many as 25 species, divided into 4 species of animal class macrobiofouling, 18 species of plant class macrobiofouling and 3 species of moss organism macrobiofouling. The highest average value of attachment rate was found in plastic drum media with a value of 6.25 ind/m2/day which was dominated by species Balanus sp. while the lowest individual attachment rate was found in the 3 m deep confinement media with a value of 0.38 ind/m2/day which was dominated by species Balanus sp. and Dictyota dichotoma. The average attachment rate of macrobiofouling moss organisms was highest in the 5 m deep confinement media with a value of 0.22 g/m2/day which was dominated by species Ectocarpus siliculosus. Based on the results of the regression analysis, the equation for the influence of water quality parameters on the rate of attachment of macrobiofouling is obtained, namely Y = 309.87+3.08X1+0.48X2-7.20X3+4.58X4-49.45X5-168.43X6-416.73X7, with The coefficient value/level of relationship is 0.66, which is in the strong relationship level category. Keywords : Characterization of Macrobiofouling Succession, Floating Cages, Tapamom Waters. ABSTRAK Biofouling adalah penempelan dan akumulasi organisme hidup yang melekat pada permukaan substrat. Keberadaan biofouling memberikan kerugian bagi lingkungan. Salah satu dampak yang ditimbulkannya ialah keberadaannya pada rakit budidaya yang mengakibatkan rakit menjadi rusak atau tenggelam. Tujuan penelitian ini adalah untuk menganalisis laju penempelan Makrobiofouling pada Keramba Apung Di Perairan Tapulaga Kecamatan Soropia. Pengambilan sampel didasarkan pada 3 (tiga) kriteria wadah penempelan makrobiofouling yaitu 1) kurungan budidaya yang di tempatkan berdasarkan 3 kedalaman yang berbeda yaitu kedalaman 1, 3 dan 5 m; 2) Drum plastik; 3) Wadah budidaya terbuka (jaring) dengan ukuran 100 x 100 x 150 cm. Jumlah jenis makrobiofouling selama penelitian diperoleh sebanyak 25 jenis yang terbagi atas makrobiofouling kelas hewan sebanyak 4 jenis, makrobiofouling kelas tumbuhan sebanyak 18 jenis dan makrobiofouling organisme lumut sebanyak 3 jenis. Nilai rata-rata laju penempelan tertinggi terdapat di media drum plastik dengan nilai 6,25 ind/m2/hari yang didominasi oleh jenis Balanus sp. sedangkan laju penempelan individu terendah terdapat di media kurungan kedalaman 3 m dengan nilai 0,38 ind/m2/hari yang di dominasi oleh jenis Balanus sp. dan Dictyota dichotoma. Laju penempelan rata-rata makrobiofouling organisme lumut tertinggi terdapat di media kurungan kedalaman 5 m dengan nilai 0,22 g/m2/hari yang didominasi oleh jenis Ectocarpus siliculosus. Berdasarkan hasil analisis regresi diperoleh persamaan pengaruh parameter kualitas air terhadap laju penempelan makrobiofouling yaitu Y = 309,87+3,08X1+0,48X2-7,20X3+4,58X4-49,45X5-168,43X6-416,73X7, dengan nilai koefisien/tingkat hubungan sebesar 0,66 yang termaksud kategori tingkat hubungan kuat. Kata Kunci: Karakterisasi Suksesi Makrobiofouling, Keramba Apung, Perairan Tapulaga