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Preferensi Pakan Alami Kerang Totok (Polymesoda erosa) di Segara Anakan Cilacap

JudulPreferensi Pakan Alami Kerang Totok (Polymesoda erosa) di Segara Anakan Cilacap
Publication TypeStudent Thesis
Year of Publication2012
AuthorsDarussalam
AdvisorsArdli ER, Prabowo RE
DegreeS1
Keywordsindex of preponderance, mangrove, Polymesoda erosa, Segara Anakan
Abstract

Penelitian ini berjudul Preferensi Pakan Alami Kerang Totok (Polymesoda erosa) di Segara Anakan Cilacap.Polymesoda erosa merupakan PhylumMolluscadalam kelas bivalvia yang hidup di ekosistem mangrove dan banyak dijumpai di kawasan hutan Mangrove Segara Anakan.Kondisi lingkungan Segara Anakan sangat mendukung bagi perkembangan organisme perairan termasuk Polymesoda erosa serta pakan alami, karena estuaria baik secara fisik-kimia perairan maupun sebagai lingkungan kaya akan sumber pakan alami untuk perkembangan organisme perairan.Polymesoda erosa memperoleh makanan yang berupa fitoplankton dan zooplankton kecil sebagai suspension feeder maupun filter feeder.Penelitian dilakukan di kawasan hutan Mangrove Segara Anakan dengan tujuan untuk mengetahui preferensi pakan alami Polymesoda erosa serta perbedaan preferensi pakan alami pada lokasi yang berbeda.Materi penelitian menggunakan kerang Polymesoda erosa.Penelitian menggunakan metode survey dengan penentuan stasiun menggunakan metode Purpossive Random Sampling, selain itu dilakukan pengukuran parameter pendukungantara lainsuhu udara dan air, salinitas, pH, bahan organik, serta tekstur substratyang mempengaruhi karakteristik Polymesoda erosa baik secara biologis maupun ekologis. Komposisi pakan alami menggunakan analisis deskriptif dengan Indeks of Preponderance (Ii). Makanan alami Polymesoda erosa berupa fitoplanktondan zooplanktondengan nilai (Ii) terbesar dari Divisio Chrysophyta.Preferensi pakan yang terdapat di dalam lambung Polymesoda erosayaitugenus Coscinodiscus(22,22%), Navicula(16,79%), Nitzschia(6,93%), Naupilius(4,72%), dan Cyclops(4,21%)merupakan spesies yang mendominasi. Komunitas pakan alami yang sering ditemukan di Stasiun 1, 2, 3, dan 4 didominasi oleh genus Coscinodiscus dari Divisio Chrysophyta, sedangkan di Stasiun 5 cenderung didominasi oleh genus Navicula dari Divisio Chrysophyta.
 
The study is entitled The Natural FeedPreferences of Kerang Totok(Polymesoda erosa) in Segara Anakan Cilacap. Polymesodaerosabelongs to a phylum of mollusks in the class of bivalves that lives in mangrove ecosystems and is often found in mangrove forests Segara Anakan. The environment of Segara Anakan is very favorable to the development of aquatic organisms including Polymesodaerosa and its natural feed. The estuary of Segara Anakan bothphysicochemically and environmentally is a natural food sourcefor the development of aquatic organisms. Polymesodaerosaobtains food in the form of phytoplankton and zooplankton as the suspension feeder and the filter feeder.The study was conducted at Segara Anakan Mangrove forest in order to determine the natural food preferences of Polymesodaerosa and to investigate the differences of the natural food preferencesin different area. Polymesoda erosais used as the research material. The research uses survey method; purposive random sampling is used to determine the station. In addition, the environmental parameterssuch as, the air and water temperature, salinity, pH, organic matter, as well as the texture of the substrate which influences the characteristics of Polymesoda erosaboth biologically and ecologicallyare measured. The composition of natural feed uses descriptive analysis with Index of Preponderance (Ii). The natural food of Polymesodaerosa in the form of phytoplanktonand zooplanktonwith the largest value of (Ii) belongs to the Chrysophytadivision. The food preferences contained in the Polymesodaerosaare dominated by genus Coscinodiscus (22.22%), Navicula (16.79%), Nitzschia(6.93%), Naupilius (4.72%), and Cyclops (4.21 %). The community of natural feed that is found in Station 1, 2, 3, and 4 is dominated by genus Coscinodiscusof Chrysophytadivision while station 5 tends to be dominated by genus Navicula from Chrysophyta division.