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      Analisis Makanan dan Kebiasaan Makan Ikan Menga (Sicyopterus lagocephalus Pallas, 1770) di Sungai Cibareno, Sukabumi, Jawa Barat

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      Date
      2024
      Author
      Poernama, Akhsan Faezya
      Ridwan
      Mashar, Ali
      Kurniawan
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      Abstract
      Sungai Cibareno merupakan salah satu sungai yang bermuara di teluk Palabuhanratu, Jawa Barat. Di Sungai Cibareno direncanakan akan dibangun bendungan yang bernama Bendung Caringin. Adanya bendungan ini diperkirakan dapat memberikan dampak pada ekosistem seperti perubahan kualitas air dan kondisi habitat Sungai Cibareno. Penelitian ini bertujuan untuk mengkaji ekologi trofik ikan menga di Sungai Cibareno dan hasil penelitiannya diharapkan dapat dijadikan dasar dalam mengelola ikan menga khususnya di Sungai Cibareno. Pengambilan sampel dilakukan pada bulan Mei hingga September 2022 di bagian hulu dan hilir Sungai Cibareno. Hasil penelitian menunjukkan bahwa ikan menga merupakan ikan herbivora dengan makanan nabati sebesar 95,4265% dan makanan hewani sebesar 5,0969%. Semakin besar ukuran ikan menga, komposisi nabati semakin meningkat. Ikan menga di bagian hilir ditemukan cenderung lebih memiliki variasi dan jumlah makanan yang lebih tinggi dibandingkan dengan ikan menga di bagian hulu. Berdasarkan luas relung dan tumpang tindih makanan, ikan menga tergolong kedalam ikan generalis yang memiliki peluang persaingan antar ukuran yang tinggi dalam mencari makanan ketika terjadi kelangkaan pakan. Hasil analisis isi saluran pencernaan menunjukkan bahwa ikan menga tergolong ikan herbivora dan aktif mencari makan di dasar perairan pada malam hari.
       
      Cibareno River is one of the river that flow into Palabuhanratu Bay, West Java. There are plans to construct an irrigation weir on Cibareno River named Bendung Caringin. The construction of this weir could impact the ecosystem, potentially water quality and habitat condition in Cibareno River. This research aims to study the trophic ecology of red-tailed goby in Cibareno River with the result serving as a management standard for this species particularly at this river. Sample collection was carried out from May to September 2022 at both upstream and downstream of the river. The result indicates that the red-tailed goby is herbivorous with starch content of 95,4265% and animal content of 5,0969%. The starch content increases the size of the fish. The downstream red-tailed goby tend to have a greater variety and quantity of food compared to their upstream counterpart. Based on niche breadth and niche overlap, this species are categorized as a generalist, with a high potential for competition for food resource during periods of scarcity. The result of red-tailed goby digestive tract content suggest it primarily herbivorous and actively foraging foods in the water bottom at night.
       
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      http://repository.ipb.ac.id/handle/123456789/157416
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      • UT - Aquatic Resources Management [2592]

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