Struktur Komunitas Dan Indeks Fisiologis Ikan Sebagai Indikator Kondisi Ekosistem Perairan Pasir Pengaraian Riau

Agus Putra AS, Indra Suharman, Afrah Junita, Saiful Mahdi

Abstract


Perairan umum Pasir Pengaraian Riau merupakan habitat penting bagi ikan air tawar serta berperan dalam menjaga keseimbangan ekosistem. Penelitian ini bertujuan untuk menganalisis struktur komunitas dan kondisi fisiologis ikan di perairan Pasir Pengaraian. Struktur komunitas dianalisis menggunakan kelimpahan relatif, indeks keanekaragaman Shannon-Wiener (H’), indeks keseragaman (E), dan indeks dominansi (C), sedangkan kondisi fqisiologis dievaluasi melalui Viscerosomatic Index (VSI) dan Hepatosomatic Index (HSI). Identifikasi ikan dilakukan berdasarkan karakteristik morfologis. Hasil penelitian menunjukkan bahwa ditemukan 961 individu yang terdiri atas 30 spesies dari 11 famili, dengan famili Cyprinidae sebagai kelompok dominan, khususnya genus Labiobarbus dan Barbonymus. Nilai indeks keanekaragaman (H’) sebesar 2,75 menunjukkan keanekaragaman sedang, indeks keseragaman (E) sebesar 0,81 menunjukkan komunitas yang relatif stabil, dan indeks dominansi (C) sebesar 0,09 menunjukkan tingkat dominansi yang rendah. Nilai VSI berkisar antara 0,93–12,38, sedangkan HSI berkisar antara 0,01–4,76. Selain itu, nilai faktor kondisi (FK) ikan berkisar antara 0,07– 4,65, yang menunjukkan variasi kondisi tubuh dan status energi antarspesies. Secara umum, perairan Pasir Pengaraian masih mampu mendukung komunitas ikan yang beragam dan relatif stabil. Integrasi analisis komunitas dan fisiologis memberikan gambaran yang lebih komprehensif mengenai kondisi ekosistem serta mendukung pengelolaan sumber daya perikanan air tawar secara berkelanjutan

Keywords


Ikan Air Tawar; Keanekaragaman; Struktur Komunitas; Riau

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DOI: https://doi.org/10.46576/jai.v5i2.8616

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