Perifiton whose life is attached to the substrate, acts as a provider of nutrients and indicators of fishery water quality. The purpose of this study was to analyze the structure, abundance and diversity of epiphytic and epidendric periphyton in floating net cages and water quality. This research was conducted by purposive sampling in upstream, middle and downstream. The method used is exploratory quantitative, from May and June 2021 with sampling time at the beginning of each month. The main phytoplankton periphyton composition consists of Chlorophyceae and Bacillariophyceae. Chlorophyceae increased from 19 genera at the beginning of the observation to 24 genera, while Bacillariophyceae decreased from 22 to 21 genera. Phytoplankton periphytons that were always present in each observation both at STA-

The cultivation of Alabio ducks (Anas Platyrynchos Borneo) so far is still natural and only involves one parameter; furthermore, each location has different characteristics. The hierarchical structure constructed has a ranking of importance as an alternative option for ducks' development in peatland ecosystems. This research aims to formulate a strategy for duck production in the Hulu Sungai Utara Regency. AHP (Analytical Hierarchy Process) method in this study is used to structure the decision-making flow from goals and alternatives and weigh the variables. Data collection was carried out with duck farming experts from academia, farmer groups, and policymakers. This study found that the availability of feed, both sago (0.254) and bran (0.218), is a significant component from an ecological perspective. Distance to market (0.307) and hatchery location (0.287) is an economic variable. The social part consists of distance from the settlement (0.443) and labor availability (0.247). Meanwhile, the availability of feed (0.282), hatchery technology (0.269), and Mina ducks (0.251) are the development strategies for duck cultivation in swamp areas, and economic stimulus (0.93) is the final contributor.

Penurunan jumlah tangkapan di perairan reservat danau panggang kabupaten hulu sungai utara sebesar 2% pertahun dari 3145,1 ton (2010) menjadi 3.030,0 ton (2013) dan kehadiran ikan lais (Cryptopterus micronema) < 1% setiap tahunnya disusul ikan baung (Mystus nemurus) < 0,5% mengindikasikan penurunan kualitas air, produktivitas perairan dan lingkungan perairan secara keseluruhan sebagai sistem ekologi. Tujuan penelitian (a) mengidentifikasi kondisi limnologis perairan di zona penyangga kawasan reservat danau panggang dengan analisis kualitas air dan biological indeks; (b) menganalisis konfigurasi ruang dari aktivitas di lokasi dan nilai sumberdaya perairan dari karakter bioekologis; (c) menilai kondisi keseluruhan atribut perairan di zona penyangga; (d) memetakan profil zonasi untuk menjelaskan kondisi eksisting di lokasi penelitian. Metode analisis kualitas air dan biological indeks serta kuissioner disertai statistik deskriptif dan pemetaan. Konsentrasi bahan organik yang tinggi berasal dari limbah organik dan tingkat biodiversitas fitoplankton lebih dominan daripada zooplankton berupa kelompok Chlorophyta air tawar sebagai pakan alami bagi larva dan benih ikan. Struktur pemukiman di lokasi terhadap perairan 50-75%, pembudidaya dan nelayan sebagai profesi utama dengan 2-10 jenis ikan yang tertangkap serta 4 jenis yang kehadirannya rendah. Pemetaan faktor penyebab kerusakan zona penyangga berasal dari peningkatan pemukiman 30%, prilaku masyarakat, intensitas penangkapan dan illegal fishing

Abstract