Study of aquaculture waste load on Holtekam coastal water of Jayapura City, Province of Papua.

Abstract

This study was conducted to determine water quality and the carrying capacity of Holtekam coastal, identify the aquaculture activities that contribute waste on coastal and impact of aquaculture waste load on status of coastal waters. Water and plankton samples were collected from brackishwater pond, canal of Kali Buaya and coastal. Questionnaires was administered to 25 farms. Results of water quality analyses showed Holtekam coastal water is characterized with higher concentration of BOD5 (Biological oxygen demand), N-total, COD (chemical oxygen demand) and TOM (total organic matter) 4.96, 4.19, 33.53 and 22.18 mgl-1 ,turbidity (7.02 NTU) and TSS (total suspended solid) 201.67 mgl-1 were higher in stream and PO4-P (2.08) in ponds. Carrying capacity of coastal water is 10 452 915 m3 and maximum of effluents 104.529 m3, respectively. Sustainable aquaculture based on carrying capacity and management practices levels are intensive system 104.5 ha, semi intensive 563 ha and traditional plus 1.125 ha. Ponds management practices is categorized as extensive plus based few input such as fertilizers, seeds and pumps. Aquaculture activities that contributed waste on coastal was harvesting.

Kawasan pesisir Holtekam potensial bagi pengembangan budidaya perikanan pantai (tambak). Luas areal tambak saat ini sekitar 583 hektar, telah berproduksi sekitar 350 hektar dengan jumlah produksi ikan tahun 2009 adalah 275.18 ton. Data spesifik jumlah buangan limbah budidaya tambak dan dampak ekologisnya terhadap perairan pesisir Holtekam masih sangat kurang. Oleh sebab itu, diperlukan suatu kajian tentang kondisi kualitas air dan daya dukung perairan pesisir Holtekam serta kegiatan budidaya tambak yang berperan menghasilkan limbah. Mengkaji pengaruh limbah buangan budidaya terhadap status lingkungan perairan pesisir Holtekam. Hasil kajian ini diharapkan sebagai data awal dan masukan bagi pelaku usaha tambak dan Pemerintah Kota Jayapura dalam memformulasi kebijakan pengelolaan lingkungan perairan pesisir Holtekam bagi pengembangan perikanan budidaya secara lestari dan bertanggung jawab.