Monitoring of Water Quality and Microalgae Species Composition of ... [PDF]

Abstrak: Laporan terdahulu telah mendedahkan bahawa kelimpahan mikroalga di dalam kolam udang adalah berbeza-beza dengan

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Tropical Life Sciences Research, 22(1), 51–69, 2011

Monitoring of Water Quality and Microalgae Species Composition of Penaeus monodon Ponds in Pulau Pinang, Malaysia 1 4

Asma Liyana Shaari, 1Misni Surif*, 2Faazaz Abd. Latiff, 3Wan Maznah Wan Omar and Mohd Noor Ahmad

1

School of Distance Education, Universiti Sains Malaysia, 11800 USM Pulau Pinang, Malaysia 2 Fisheries Research Institute, Jalan Batu Maung, 11960 Batu Maung, Pulau Pinang, Malaysia 3 School of Biological Sciences, Universiti Sains Malaysia, 11800 USM Pulau Pinang, Malaysia 4 School of Bioprocess Engineering, Universiti Malaysia Perlis, 01000 Kangar, Perlis, Malaysia Abstrak: Laporan terdahulu telah mendedahkan bahawa kelimpahan mikroalga di dalam kolam udang adalah berbeza-beza dengan perubahan faktor persekitaran seperti cahaya, suhu, pH dan status nutrien sepanjang tempoh penternakan udang. Dalam kajian ini, tempoh penternakan udang dibahagikan kepada tiga fasa (awal = minggu 0–5, pertengahan = minggu 6–10 dan akhir = minggu 11–15). Faktor fizikal dan kimia sepanjang tempoh penternakan ini dikaji dan komposisi mikroalga dipantau. Faktor fizikal didapati berubah-ubah dengan nilai julat keamatan cahaya antara 182.23–1278 µmol foton m–2s–1, suhu antara 29.56ºC–31.59ºC, oksigen terlarut antara 4.56–8.21 mg/l, pH + – antara 7.65–8.49 dan saliniti antara 20‰–30‰. Kepekatan amonium (NH4 -N), nitrit (NO2 – 3– -N), nitrat (NO3 -N), dan ortofosfat (PO4 -P) di kolam udang pada semua fasa penternakan setiap satunya mempunyai julat bacaan antara 0.017–0.38 mg/l, 0.24–2.12 mg/l, 0.06–0.98 mg/l dan 0.16–1.93 mg/l masing-masing. Ujian statistik (ANOVA) menunjukkan bahawa tidak terdapat perbezaan yang signifikan (p

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