Distribusi Ikan pada Wilayah Genangan Berbeda di Danau Tempe, Sulawesi Selatan

Abstract

<strong>Fish Distribution at Different Inundation Areas in Lake Tempe, South Sulawesi. </strong>Lake Tempe area consists of permanent standing watersand non-permanent area (flooded area). This study aims to investigate the species and its relative abundance distribution, as well as the distribution of size, condition factor, and gonad maturity stage of dominant species at those different areas. Sampling was carried at high water level period (March, June, and August 2017) in 18 stations, stations 1 to 13 represent the non-permanent inundation areas, and stations 14 to 18 represent the permanent inundation area. Fish was caught using various gears. Fish was identified morphologically and the number was counted. The size of the dominant species was measured and the gonad maturity stage was determined. Data were analyzed using descriptive and inferential statistics. The results of this study show that the highest number of species is found in non-permanent inundation areas. Species that are only found in non-permanent inundation areas are <em>Clarias batrachus</em>, <em>Anabas testudineus</em>, <em>Pangasianodon hypopthalmus</em>, and <em>Trichopodus pectoralis</em>. The dominant fish in the non-permanent inundation area are <em>Oxyeleotris marmorata</em>, <em>Channa striata</em>, <em>Oreochromis niloticus</em>, <em>Trichopodus trichopterus</em>, and <em>Pterygoplichthys pardalis</em>. These fishes have contributed significantly to capture fisheries production. The most abundant fish is <em>Barbonymus gonionotus</em>. The condition factor and the gonad maturity stage of the <em>B. gonionotus</em>in in the both areas were not significantly different. Larger fishes and higher relative abundance of <em>B. gonionotus</em>, when the water level was rising, were found in permanent inundation area. It can be concluded that the existence of those different inundation areas is important for fisheries productivity in Lake Tempe

Fish Diversity and Water Quality of Ayamaru Lake, West Papua

“…The dissolved oxygen content range was between 2.48-9.91 mg per liter or on average of 6.08 mg/liter. Compared with Tempe Lake [12], the dissolved oxygen was around 1.9-10.4 mg/l. As well temperature, the oxygen will decrease depending on the depth.…”

“…Generally, lake waters have pH value above seven or an average of 8. The pH of Ayamaru Lake was relatively the same as some lakes in Indonesia, such as Kerinci Lake (7.1 -8.2) [13] and Tempe Lake (6.6-8.6) [12]. In 2012, the Ayamaru lake was unique water, that as the karst area, the pH tended to alkaline (pH>7) with a high hardness level [14].…”

HUBUNGAN KARAKTER PANJANG, POLA PERTUMBUHAN DAN KONDISI IKAN TAWES (Barbonymus gonionotus Bleeker, 1849) DI DANAU BATUR, BALI

“…Salah satu spesies dari famili Cyprinidae yang tersebar luas di perairan umum daratan Indonesia adalah ikan tawes (B. gonionotus). Spesies ikan ini tersebar di Sumatera (Samitra dan Rozi, 2019;Efizon et al, 2021), Jawa (Budiharjo, 2001;Ayyubi et al, 2019), Sulawesi (Dina et al, 2020), Kalimantan (Dahruddin et al, 2021), hingga Papua (Dwirastina dan Marson, 2021). Ikan tawes merupakan spesies ikan yang dikembangan untuk budidaya dan telah diintroduksi ke banyak perairan (Muchlisin, 2013), salah satunya adalah Danau Batur di Pulau Bali.…”

Reproductive biology climbing perch Anabas testudineus (Bloch 1792) at Danau Tempe Kabupaten Wajo South Sulawesi

“…Berdasarkan laporan Nasution (2015), ikan yang dominan ditemukan yaitu sepat siam (Trichopodus pectoralis) dan ikan nilem (Osteochilus vittatus); selanjutnya berdasarkan data Dinas Kelautan dan Perikanan (2016), ikan sepat siam (T. pectoralis), nila (Oreochromis niloticus), dan tawes (Barbonymus gonionotus); Dina et al (2020) melaporkan ikan paling dominan yang ditemukan baik pada wilayah danau yang tergenang permanen maupun tidak tergenang permanen yaitu ikan tawes. Dominannya ikan-ikan introduksi menjadi masalah terhadap menurunnya keanekaragaman ikan asli.…”