Pengetahuan mengenai komunitas larva ikan dan dinamikanya dalam suatu perairan menjadi salah satu unsur yang diperlukan dalam kerangka pengelolaan sumberdaya ikan di suatu kawasan perairan. Data mengenai sebaran larva ikan di suatu perairan menjadi salah satu informasi untuk
56 mengetahui tempat pemijahan (spawning ground) dan pengasuhan (nursery ground) ikan yang diperlukan untuk upaya pengelolaan sumberdaya ikan melalui perlindungan habitat pemijahan dan pengasuhannya. Sebagaimana diketahui bahwa fase larva merupakan fase kritis dalam siklus hidup ikan yang akan menentukan keberlanjutan stoknya maka perubahan habitat pemijahan dan pengasuhan akibat degradasi lingkungan perairan akan menjadi ancaman bagi keberlanjutan stok ikan di perairan. Saat ini data mengenai komunitas larva ikan, dinamika serta sebarannya di perairan menjadi data penting untuk menentukan kawasan refugia perikanan (fisheries refugia) (UNEP, 2007).
Kawasan estuaria Pelawangan Timur merupakan alur lalu lintas kapal dari beberapa kegiatan industri di sekitarnya. Selain itu beberapa wilayah di perairan tersebut merupakan daerah penangkapan ikan oleh nelayan. Dalam Perda Kab. Cilacap No. 6 Tahun 2001 tentang Pengelolaan Perikanan di Kawasan Segara Anakan, telah dinyatakan adanya kawasan lindung yang meliputi kawasan perairan pintu masuk bagian timur dari samudera Hindia (pintu masuk kawasan Pelawangan Timur) sampai perairan Sungai Sapuregel, daerah pertemuan Sungai Sapuregel dan Kembang Kuning (Gambar 28).
57 Berdasarkan data komunitas larva ikan yang diperoleh di estuaria Pelawangan Timur, maka beberapa kawasan perairan tersebut perlu dipertimbangkan untuk menjadi daerah perlindungan bagi ikan-ikan laut yang melakukan pemijahan di kawasan estuaria. Beberapa stasiun pengambilan sampel termasuk ke dalam kawasan lindung yang ditetapkan oleh pemerintah Kabupaten Cilacap (Gambar 28). Berdasarkan data sebaran komunitas larva ikan, implementasi kawasan lindung harus segera dilaksanakan mengingat potensi kawasan tersebut sebagai daerah pemijahan dan pengasuhan larva namun hingga saat ini kawasan tersebut masih menjadi daerah penangkapan oleh nelayan dengan alat tangkap apong (Fyke net).
58
5 SIMPULAN DAN SARAN
5.1 Simpulan
Total larva ikan yang tertangkap selama penelitian adalah 5186 ekor yang terdiri dari 21 familia dan 33 genus. Famili Gobiidae merupakan penyusun terbesar dalam komunitas larva ikan di estuaria Pelawangan Timur yaitu sebesar 66,62%, diikuti oleh famili Engraulidae (10,72%), Clupeidae (9,99%) dan Blennidae (7,60%). Larva dominan yang menyusun komunitas larva ikan adalah dari genus Tridentiger (46,39%) dengan kelimpahan 1836/100 m3, Rhinogobius (9,91%) dengan kelimpahan 392 ind/100 m3, Gobiidae sp1 (7,19%) dengan kelimpahan 285 ind/100 m3, Sardinella (7,98%) 318 ind/100 m3, Stolephorus (6,71%) 266 ind/100 m3 dan Omobranchus (7,6%) 301 ind/100 m3.
Larva ikan famili Gobiidae seperti Tridentiger dan Rhinogobius memiliki sebaran yang luas di estuaria Pelawangan Timur dan memijah sepanjang waktu penelitian. Larva ikan famili Clupeidae (Sardinella dan Herklotsichthys) dan Engraulidae (Stolephorus dan Engraulis) cenderung berada pada bagian estuaria yang dekat dengan laut. Jenis tersebut merupakan ikan yang bermigrasi ke perairan estuaria pada waktu tertentu terkait dengan masa pemijahan dan pengasuhan larva sedangkan famili Gobiidae merupakan penghuni tetap perairan estuaria (sedentary) dan mampu beradaptasi dengan kondisi lingkungan di ekosistem tersebut. Parameter lingkungan yang berkorelasi positif terhadap keberadaan larva Clupeidae (Sardinella dan Herklotsichthy) adalah salinitas dan fitoplankton. Kekeruhan perairan tidak menjadi penghalang bagi keberadaan larva Gobiidae (Tridentiger) dan larva Engraulidae (Stolephorus dan Engraulis) di estuaria tersebut.
5.2 Saran
Untuk dapat menggambarkan secara lengkap dinamika komunitas larva ikan di perairan estuaria Pelawangan Timur beserta fluktuasinya yang dipengaruhi oleh musim diperlukan rentang waktu penelitian yang lebih lama. Hal tersebut sangat diperlukan untuk memperkuat informasi jenis ikan laut apa saja yang memiliki ketergantungan terhadap ekosistem estuaria sebagai habitat
59 pemijahan dan pengasuhan. Informasi tersebut dapat digunakan sebagai dasar pengelolaan habitat daerah pemijahan dan asuhan, selain itu dalam penelitian ini belum tergambar pola arus yang mempengaruhi keberadan dan sebaran larva ikan di perairan tersebut. Oleh karena itu diperlukan penelitian lebih lanjut mengenai pola arus terhadap penyebaran larva ikan di perairan estuaria tersebut.
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67 Lampiran 1. Kelimpahan Larva Ikan (ind/ 100 m3) di Stasiun I, II, III
GENUS
ST I ST II ST III
Juni Juli Agst Juni Juli Agst Juni Juli Agst
p s p s p s p s p s p s p s p s p s p s p s p s p s p s p s p s p s p s Ambassis 0 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 Hypoatherina 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Omobranchus 0 22 7 8 25 0 0 6 2 0 12 5 6 9 2 0 3 10 0 0 6 0 0 0 2 0 2 2 5 2 0 0 2 2 2 0 Caranx 0 0 0 0 2 2 0 0 0 0 0 1 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Herklotsichthys 0 0 0 0 18 59 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Sardinella 0 0 0 2 149 47 0 0 2 0 2 0 0 0 0 0 11 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Engraulis sp 3 8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 134 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Stolephorus 8 5 0 0 0 0 0 0 2 6 0 0 2 8 0 2 0 0 0 2 0 170 0 0 4 8 0 2 0 0 0 0 2 2 0 0 Cynoglossus 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Eleotris 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Gerres 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Gobiidae spp1 5 10 0 5 0 0 0 0 0 0 0 2 3 26 1 0 0 22 5 0 3 0 0 1 43 0 0 0 0 0 0 0 0 0 0 0 Gobiidae spp2 0 0 0 0 0 0 2 0 0 0 0 0 0 12 0 0 0 0 0 14 0 0 0 0 0 0 0 0 0 40 0 11 0 0 0 0 Glossogobius 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Tridentiger 0 0 0 0 0 0 0 0 3 16 0 0 0 0 0 5 0 0 2 40 0 149 2 0 0 559 50 5 0 53 11 6 7 10 8 4 Rhinogobius 0 0 0 0 0 0 0 0 0 0 0 0 0 6 0 1 0 0 0 6 0 0 0 0 0 176 0 2 0 0 0 2 0 0 0 0 Rediogobius 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Acentrogobius 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Parachaeturichthys 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Secutor 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 Mugil 0 0 0 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Liza 0 0 0 0 0 0 0 0 0 5 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Upeneus 0 0 1 0 0 0 2 0 0 0 2 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Ostracidae 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 Pomacentrus 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Pomachantidae 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 Eleutheronema 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Sillago 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Parasyngnathus 0 0 0 0 0 0 0 0 1 6 0 0 0 0 0 2 0 1 0 7 1 9 0 0 1 1 0 0 4 4 0 0 0 8 0 0 ootethus 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Tetraodontidae 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Parapercis 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 UI 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
68 Lampiran 2. Kelimpahan Larva Ikan (ind/100 m3)
Genus
ST IV ST V ST VI
Juni Juli Agst Juni Juli Agst Juni Juli Agst
p s p s p s p s p s p s p s p s p s p s p s p s p s p s p s p s p s p s Ambassis 0 0 0 0 0 0 0 0 6 0 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 2 0 Hypoatherina 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 Omobranchus 0 0 5 2 0 2 4 0 0 3 5 2 0 0 0 0 2 3 3 4 5 8 2 33 5 0 26 11 2 0 14 0 4 11 7 2 Caranx 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 Herklotsichthys 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Sardinella 0 1 0 0 69 14 1 0 0 0 0 0 0 0 0 0 7 0 0 0 1 0 0 0 0 0 0 0 5 0 0 5 0 0 0 0 Engraulis sp 5 4 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 2 0 0 0 0 0 0 0 3 0 0 0 0 0 0 0 0 0 0 Stolephorus 0 17 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 13 7 0 0 0 2 0 0 0 0 0 0 Cynoglossus 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 Eleotris 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Gerres 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 Gobiidae spp1 0 0 0 0 0 2 4 0 0 0 0 0 5 21 0 2 1 0 0 34 0 0 0 0 0 21 0 15 8 0 0 0 0 0 0 0 Gobiidae spp2 3 42 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10 2 Glossogobius 4 0 9 2 2 0 0 0 0 0 0 0 0 0 0 0 0 0 5 0 0 0 0 0 0 0 0 0 0 5 0 0 0 0 0 0 Tridentiger 0 620 0 0 0 0 0 0 0 18 0 4 0 27 1 2 0 30 53 0 2 8 4 0 13 27 6 14 0 11 44 21 2 1 0 0 Rhinogobius 0 175 0 5 0 0 0 0 0 0 0 0 2 3 2 2 0 0 8 0 0 1 0 0 2 0 5 1 0 0 2 0 0 0 0 0 Rediogobius 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Acentrogobius 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 Parachaeturichthys 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 Secutor 0 11 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Mugil 0 0 0 0 0 2 0 1 0 0 1 0 0 0 0 5 0 0 0 0 0 0 0 0 0 0 2 6 0 0 0 0 0 0 2 0 Liza 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0 0 0 0 0 0 Upeneus 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Ostracidae 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Pomacentrus 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Pomachantidae 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Eleutheronema 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Sillago 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Parasyngnathus 0 4 0 2 2 0 0 0 1 0 0 2 0 0 0 0 0 5 7 3 2 2 2 1 0 2 0 0 0 8 0 4 1 2 1 0 ootethus 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Tetraodontidae 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 Parapercis 0 0 0 0 0 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 UI 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
69 Lampiran 3. Kualitas Air Bulan Juni di Lokasi Penelitian
2 Juni 2011 parameter satuan St I St II St III St IV St V St VI
pasang surut pasang surut pasang surut pasang surut pasang surut pasang surut Kecerahan (cm) 80.0 40.0 100.0 50.0 60.0 25.0 85.0 20.0 55.0 20.0 60.0 10.0 Kecepatan arus mps 0.57 0.86 0.48 0.05 0.27 0 0.13 0.17 0.03 0.67 0.36 0 Kedalaman m 8.9 7.9 6.3 6.2 3.9 2.5 6 2.9 3.5 2.8 5.8 2.9 Suhu udara °C 28 30 30 32 29 30 28 30 30 30 29 30 Suhu air °C 29 30.9 28.7 30.5 30.1 30.8 28.5 29.4 29.9 30.7 28.7 29.5 PH unit 8 7.5 7.5 7.5 7.5 7.5 7.5 7 7.5 7.5 7.5 7.5
Warna air hijau hijau coklat coklat hijau coklat coklat coklat coklat coklat coklat coklat DO (alat) mg/l 3.74 3.91 3.46 5.85 5.31 5.14 4.74 4.04 4.12 3.72 5.23 3.41 DO (winkler) 3.44 3.08 2.90 4.08 4.17 3.89 2.90 2.45 2.45 2.17 3.44 2.35 salinitas (refrakto) 35 34 31 30 31 30 30 28 30 30 30 29 Turbidity NTU 6.00 62.10 6.52 17.00 10.37 50 10.00 54.00 30.21 76.00 12.00 126.00 NO3 0.111 0.131 0.356 0.114 0.156 0.184 0.227 0.177 0.117 0.092 0.2 0.229 NH4 0.628 0.48 1.707 0.592 1.065 1.15 2.772 0.867 1.728 0.959 1.439 1.114 PO4 0.032 0.019 0.016 0.021 0.049 0.03 0.015 0.04 0.033 0.014 0.036 0.034 16 juni 2011 Kecerahan (cm) 165.0 140.0 105.0 100.0 65.0 50.0 120.0 155.0 125.0 115.0 155.0 170.0 Kecepatan arus mps 0 0.038 0 0.138 0.075 0.022 0.268 0.029 0 0 0.129 0.036 Kedalaman m 12.4 11 7.7 7 1.6 1.3 5 1.8 3.1 3 3.8 2.7 Suhu udara °C 29 30 30 30 30 31 29 28 29 28 29 30 Suhu air °C 28 28.6 30.8 29.1 29.1 29.5 28.8 27.8 28.5 27.7 28.6 27.8 PH unit 8 8 8 8 8 8 8 8 7.5 7.5 7.5 8
Warna air hijau hijau coklat coklat coklat coklat coklat coklat DO (alat) mg/l 4.5 3.85 4.47 4.47 4.32 4.16 4.84 4.49 3.76 3.32 3.79 4.36 DO (winkler) 4.1 3.5 4.47 4 4.17 4.12 4.2 4.12 3.5 3 3 4.17 salinitas (refrakto) 31 30 29 28 26 26 31 30 29 26 30 29 Turbidity NTU 4.00 7.00 8.00 6.00 15.00 16.00 4.00 3.34 9.00 4.00 5.12 4 NO3 (mg/L) 0.012 0.098 0.134 0.096 0.128 1.955 0.291 0.07 0.114 0.961 0.08 0.254 NH4 (mg/L) 0.148 0.43 0.113 0.444 0.473 0.677 0.388 0.183 0.324 0.367 0.303 0.346 PO4 (mg/L) 0.026 0.011 0.019 0.004 0.007 0.021 0.014 0.012 0.015 0.017 0.036 0.03
70 Lampiran 4. Kualitas Air Bulan Juli di Lokasi Penelitian
1 Juli 2011 satuan
St I St II St III St IV St V St VI
parameter pasang surut pasang surut pasang surut pasang surut pasang surut pasang surut Kecerahan (cm) 90.0 20.0 80.0 20.0 60.0 20.0 60.0 60.0 30.0 20.0 70.0 20.0 Kecepatan arus mps 0.106 0.09 0 0.055 0 0.102 0.125 0.065 0.067 0.145 0.113 0.173 Kedalaman m 11 2.4 7.3 6.1 3.1 2 8.1 7.3 6 5 6.8 5.2 Suhu udara °C 29 31 27 30 30 30 29 29 29 31 30 30 Suhu air °C 26.4 27.2 28.7 29.8 28.5 29.2 27.2 27.4 27.5 28.1 27.3 28.4 PH unit 8 8 8 8 8 7.5 8 8 8 7.5 7.5 8
Warna air hijau hijaucoklat hijau coklat coklat coklat coklat coklat coklat coklat coklat coklat DO (alat) mg/l 4.82 4.8 4.82 4.17 3.93 4.05 4.62 4.4 3.84 3.78 4.9 3.94 DO (winkler) 4.10 4.68 4.68 3.71 3.71 3.51 4.29 4.88 3.90 4.10 3.12 3.51 salinitas (refrakto) 34 34 31 33 31 30 33 32 33 34 32 33 Turbidity NTU 6.00 82.00 9.00 52.00 15.10 36.00 16.00 30.00 17.00 74.00 22 69 NO3 0.027 0.331 0.148 1.03 1.191 0.284 0.061 1.425 0.111 0.257 0.099 0.325 NH4 0.804 0.79 0.776 0.776 1.107 1.374 0.578 0.677 0.994 1.023 0.719 0.776 PO4 0.005 0.003 0.017 0.004 0.006 0.004 0.012 0.009 0.026 0.005 0.01 0.009 15 Juli 2011 Kecerahan (cm) 70.0 60.0 60.0 50.0 60.0 40.0 100.0 100.0 95.0 60.0 80.0 25.0 Kecepatan arus mps 0.12 0.143 0 0.27 0.100 0.17 0.1 0.07 0.07 0 0 0.143 Kedalaman m 11 5.6 6.6 6.6 5.6 5.1 6.9 5.6 3.7 4.5 5.9 4.2 Suhu udara °C 29 27 29 30 29.5 29 29 30 29 30 27 27 Suhu air °C 27.9 27.8 29.9 29.3 28.5 29.8 28.3 27.8 28.3 29.1 28.2 28.7 PH unit 8 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 8 7.5 Warna air hijau coklat coklat Coklat hijau coklat hijau coklat coklat
hijau hijau coklat hijau coklat coklat coklat DO (alat) mg/l 4.23 4.03 2.83 3.3 2.68 3.55 3.4 3.39 2.54 3.38 3.19 4.26 DO (winkler) 4.88 3.51 2.93 3.32 2.93 4.49 3.71 2.93 3.12 3.51 3.51 4.29 salinitas (refrakto) 30 30 30 30 28 30 30 28 31 33 31 31 Turbidity 17.41 11.00 13.70 14.25 10.65 11.71 7.55 7.70 9.61 7.29 7.16 17.43 NO3 0.154 1.537 1.615 1.476 0.156 0.074 1.306 0.122 1.444 0.117 0.122 0.696 NH4 0.176 0.162 0.642 0.592 0.19 0.155 0.169 0.19 0.169 0.804 0.219 0.233 PO4 0.003 0.007 0.005 0.005 0.015 0.006 0.006 0.005 0.034 0.004 0.006 0.006
71 Lampiran 5. Kualitas Air Bulan Agustus di Lokasi Penelitian
1 Agustus 2011 satuan
St I St II St III St IV St V St VI
Parameter pasang surut pasang surut pasang surut pasang surut pasang surut pasang surut
Kecerahan (cm) 30.0 25.0 40.0 10.0 40.0 20.0 65.0 30.0 50 40.0 40.0 40.0 Kecepatan arus mps 0.53 0.56 0.043 0.163 0.132 0.102 0.396 0.3 0 0.06 0 0.09 Kedalaman m 5.6 3 7.5 6 2.5 2.0 6.4 5.6 3.5 3.7 5 4.2 Suhu udara °C 27.0 29 28 30 28 29 27 29 30 31 27 30 Suhu air °C 27.2 28.3 27.4 28.4 28.4 28.7 27.5 28.4 27.5 28.8 27 28.3 PH unit 7.5 8 8 7.5 7.5 7.5 7.5 8 8 7.5 8 8
Warna air coklat keruh coklat coklat Coklat pekat coklat COKLAT coklat coklat COKLAT COKLAT COKLAT coklat
DO (alat) mg/l 4.9 5.25 6.26 5 4.32 5.12 5.68 5.63 6.3 5.87 5.49 6.23 DO (winkler) mg/l 3.32 3.90 4.29 4.68 3.90 4.10 3.71 2.54 4.29 3.32 3.51 4.10 salinitas (refrakto) 31.0 33 31 31 31 31 31 31 31 30 30 30 Turbidity NTU 46.8 61.00 34.08 154.00 39.08 61.00 14.97 50.00 36.1 29.98 27.37 34.08 NO3 0.088 0.11 0.117 0.267 0.143 0.224 0.387 0.101 0.221 1.722 0.644 0.137 NH4 0.283 0.202 0.415 0.730 0.143 0.112 0.102 0.573 0.187 0.844 0.059 0.601 PO4 0.012 0.01 0.024 0.030 0.019 0.014 0.017 0.018 0.029 0.013 0.02 0.022 15 Agustus 2011 Kecerahan (cm) 80.0 40.0 60.0 70.0 60.0 45.0 65.0 75.0 65 100.0 80.0 40.0 Kecepatan arus mps 0.1 0.39 0.45 0 0.160 0 0.152 0 0.088 0.191 0.000 0.102 Kedalaman m 9.0 6 8 6.8 4.7 3.4 7 6 2.8 2 5.2 4.3 Suhu udara °C 26.0 26.5 28.5 30.5 29 30 28 30 28 30 29 30 Suhu air °C 26.7 27.2 29.4 30.4 28.3 29.9 27.6 28.4 28.2 28.7 27.8 28.4 PH unit 8.0 8 7.5 8 7.5 8 8 8 7.5 7.5 7.5 8
Warna air hijau coklat cklt hijau coklat coklat coklat coklat coklat coklt hijau coklat hijau cklt keruh
DO (alat) mg/l 4.5 5.26 4.72 4.2 3.47 4.52 4.83 4.26 4.09 5.18 5.2 4.98 DO (winkler) mg/l 4.10 5.07 4.49 4.88 4.88 4.88 4.49 2.54 3.51 5.46 5.27 5.46 salinitas (refrakto) 35.0 35 32 35 31 32 32 35 35 33 33 33 Turbidity NTU 11.5 21.00 13.00 15.00 22.00 40.00 10.13 16.00 28.00 18.00 9.00 34.55 NO3 0.380 1.051 0.117 0.144 0.141 0.107 0.202 0.192 0.141 0.232 1.516 0.239 NH4 0.980 0.917 0.557 0.797 1.269 0.55 0.684 0.487 0.811 1.354 0.987 1.079 PO4 0.036 0.032 0.024 0.020 0.046 0.038 0.049 0.021 0.046 0.019 0.049 0.025
72 Lampiran 6. Data Kelimpahan Fitoplankton (sel/l) Bulan Juni
No.
Kelas dan Genus
St I St II St III St IV St V St VI