PENGARUH KEPADATAN SPAT KERANG MUTIARA (PINCTADA MAXIMA) DENGAN METODE LONGLINE TERHADAP PERTUMBUHAN DAN KELANGSUNGAN HIDUP
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Muhammad Junaidi , Zaenal Ahmad , Baiq Hilda AstrianaDOI:
10.29303/jbt.v19i2.1273Published:
2019-10-22Issue:
Vol. 19 No. 2 (2019): Juli - DesemberKeywords:
pertumbuhan, kelangsungan hidup, spat, Pinctada maximaArticles
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Abstract
Abstrak : Penelitian kepadatan spat kerang mutiara yang dipelihara di alam perlu terus dilakukan karena belum ada patokan tingkat kepadatan yang sesuai untuk usaha komersial. Oleh karena itu dilakukan penelitian dengan tujuan mengetahui pengaruh kepadatan terhadap pertumbuhan dan tingkat kelangsungan hidup spat kerang mutiara (Pinctada maxima). ÃÂ Metode yang digunakan adalah Rancangan Acak Kelompok (RAK) terdiri dari 5 perlakuan dan 3 ulangan, yakni perlakuan A (60 ind/poket), B (75 ind/poket), C (90 ind/poket), D (105 ind/poket), dan perlakuan E (120 ind/poket). Ukuran spat yang digunakan rata-rata 1 cm pada poket (keranjang pemeliharaan) 45x60 cm2. Hasil penelitian selama 45 hari menunjukan bahwa pertumbuhan pada semua perlakuan tidak berbeda nyata, namun pertumbuhan terbaik dengan nilai 0,70 cm untuk pertumbuhan mutlak dan 0,69% untuk laju pertumbuhan harian dimiliki oleh kepadatan yang rendah yakni 60 ind/poket, disusul oleh perlakuan lainnya seperti perlakuan B,C,D, dan E. Hasil uji ANOVA, SR didapatkan hasil persentase yang berbeda nyata, yakni terdapat pada perlakuan A (60 ind/poket) dengan nilai SR 90,44% dan pada perlakuan E (120 ind/poket) dengan nilai SR 74,44%. Berdasarkan hasil penelitian, disimpulkan bahwa padat penebaran yang berbeda tidak berpengaruh nyata terhadap pertumbuhan spat kerang mutiara, namun berpengaruh nyata terhadap tingkat kelangsungan hidup (SR) spat kerang mutiara (Pinctada maxima) yang dipelihara selama 45 hari.
Kata kunci : Pertumbuhan, kelangsungan hidup, spat, Pinctada maxima
Abstract : The study of pearl shell spat density maintained in nature needs to be continued because there is no standard level of density suitable for commercial businesses. Therefore a study was conducted with the aim of knowing the effect of density on growth and survival rate of pearl oyster spat (Pinctada maxima). The method used is Randomized Block Design (RBD) consisting of 5 treatments and 3 replications, namely treatment A (60 ind / pocket), B (75 ind / pocket), C (90 ind / pocket), D (105 ind / pocket) ), and treatment E (120 ind / pocket). The size of the spat used was 1 cm on the pocket (maintenance basket) 45x60 cm2. The results of the 45-day study showed that growth in all treatments was not significantly different, but the best growth was 0.70 cm for absolute growth and 0.69% for the daily growth rate owned by a low density of 60 ind / pocket, followed by treatment others such as treatment B, C, D, and E. The results of the SR ANOVA test showed that the percentage results were significantly different, which were found in treatment A (60 ind / pocket) with SR values of 90.44% and in treatment E (120 ind / pocket) with an SR of 74.44%. Based on the results of the study, it was concluded that the different stocking densities had no significant effect on the growth of pearl shell spat, but significantly affected the survival rate (SR) of pearl shell spat (Pinctada maxima) which was maintained for 45 days.
Keywords: growth, survival rate, spat, Pinctada maxima.
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