MANAJEMEN KUALITAS MEDIA PENDEDERAN LELE PADA LAHAN TERBATAS DENGAN TEKNIK BIOFLOK
(1) Fakultas Biologi Universitas Jenderal Soedirman Purwokerto, Indonesia
(2) Fakultas Biologi Universitas Jenderal Soedirman Purwokerto, Indonesia
(3) Fakultas Biologi Universitas Jenderal Soedirman Purwokerto, Indonesia
Abstract
Akuakultur intensif bisa menyebabkan menurunnya kandungan oksigen dan meningkatnya kandungan limbah pada ekosistem perairan, khususnya nitrogen organik. Transfer teknologi sudah dilakukan dengan tujuan untuk mengelola kegiatan budidaya lele pada daerah terbatas menggunakan bioflok. Tujuan penelitian ini adalah membandingkan pertumbuhan ikan lele yang dipelihara menggunakan sistem bioflok dan non bioflok. Sampel penelitian yang digunakan adalah 500 bibit ikan berumur 10 hari, yang dipelihara selama 30 hari. Pengamatan dilakukan pada hari ke-0, 15, dan 30. Parameter pertumbuhan yang diamati adalah panjang dan berat ikan. Parameter lingkungan yang diamati adalah suhu air dan udara, karbondioksida terlarut, oksigen terlarut, dan pH. Hasil penelitian menunjukkan bahwa ada perbedaan peningkatan panjang dan berat tubuh benih lele pada kedua media budidaya. Meskipun peningkatan pertumbuhan tidak terlalu tinggi, namun cukup memberikan gambaran bahwa benih lele yang dipelihara dengan aplikasi bioflok mengalami pertumbuhan yang lebih baik. Hal ini mengindikasikan bahwa pakan yang diberikan dan media pemeliharaannya mampu mendukung pertumbuhan benih lele. Media pemeliharaan yang mengaplikasikan teknik bioflok menunjukkan kondisi yang lebih baik dan relatif ideal untuk pendederan lele. Hal ini juga diperkuat dengan relatif rendahnya tingkat kematian benih selama pemeliharaan, yaitu 10%.
Intensive aquaculture might decrease of the dissolved oxygen and increase the wastes, particularly organic nitrogen, in the aquatic ecosystem. Technology transfer has long been made to improve the catfish rearing management in confined tanks using biofloc. The objective of the research was to compare the growth of catfish reared in non-biofloc and biofloc systems. Samples were 500 catfish seedlings aged 10 days and reared for 30 days. Observations were made on day 0, 15, and 30. Growth parameters observed were length and weight of the fish. The environmental parameters observed were air and water temperatures, dissolved carbon dioxide, dissolved oxygen, and pH. The length and weight of the fish on both rearing media were not quite noticeable, however, this can give illustration that catfish seedlings reared in biofloc system grew better than in non-biofloc system. This indicated that the feed given to the fish and the biofloc rearing media could support the fish growth and the media in the biofloc system showed better condition and relatively ideal for the rearing of catfish seedlings. This was supported by the relatively low fish mortality during the study, i.e. 10%.
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