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Pola Distribusi Dan Biomassa Gastropoda Di Perairan Sedati, Sidoarjo, Jawa Timur

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Pola Distribusi Dan Biomassa Gastropoda Di Perairan Sedati, Sidoarjo, Jawa Timur IR-PERPUSTAKAAN UNIVERSITAS AIRLANGGA RINGKASAN SITI FADLIYAH. Pola Distribusi dan Biomassa Gastropoda di Perairan Sedati, Sidoarjo, Jawa Timur. Dosen Pembimbing Utama Yudi Cahyoko, Ir., M.Si. dan Dosen Pembimbing Serta Luthfiana Aprilianita Sari, S.Pi., M.Si. Indonesia dikenal sebagai negara kepulauan yang mempunyai wilayah laut dan perairan sebesar 75%. Indonesia memiliki kekayaan begitu besar untuk moluska yang salah satunya gastropoda (siput laut). Perairan Sedati merupakan salah satu wilayah pesisir Kabupaten Sidoarjo yang memiliki potensi sumberdaya moluska berupa siput laut. Penangkapan moluska tanpa memikirkan keberadaan moluska dapat menyebabkan penurunan populasi moluska yang dapat mempengaruhi pola distribusi dan biomassanya dalam perairan. Pola distribusi dan biomassa gastropoda pada suatu perairan ditentukan oleh lingkungan abiotik, biotik dan toleransi gastropoda terhadap masing-masing faktor lingkungan. Penelitian ini bertujuan untuk mengetahui pola distribusi dan biomassa gastropoda di perairan Sedati, Sidoarjo, Jawa Timur. Penelitian ini menggunakan metode observasi dengan analisis deskriptif. Penentuan titik pengambilan sampel menggunakan metode purposive sampling. Sedangkan pengambilan sampel menggunakan metode Stratified Random Sampling. Parameter utama yang diamati adalah indeks distribusi (Id), indeks kepadatan (Q) dan indeks biomassa (B). Parameter pendukung adalah kualitas air, oseanografi (angin, arus dan curah hujan), bahan organik substrat dan fraksi substrat. Jenis-jenis gastropoda yang ditemukan dan dominan hidup di perairan Sedati pada bulan Oktober hingga Desember adalah Natica vitellus, Notocochlis tigrina, Babylonia spirata, Turricula javana, Cryptospira ventricosa, Murex trapa, Rapana venosa, Nassarius olivaceus dan Nassarius stolatus. Identifikasi gastropoda dilakukan dengan pengukuran panjang dan berat, serta melihat ciri-ciri morfologinya yang menggunakan buku acuan Abbott and Dance, Hossain et al. dan World Register of Marine Species (WoRMS). Pola distribusi gastropoda di perairan Sedati memiliki pola penyebaran seragam dan mengelompok. v SKRIPSI POLA DISTRIBUSI DAN… SITI FADLIYAH IR-PERPUSTAKAAN UNIVERSITAS AIRLANGGA Kepadatan gastropoda di perairan Sedati pada stasiun A, stasiun B dan stasiun C tidak menunjukkan perbedaan yang signifikan (p>0,05). Nilai kepadatan dan biomassa gastropoda di stasiun C lebih besar dari stasiun A dan B dengan nilai tertinggi pada bulan Desember. Nilai biomassa rata-rata gastropoda tertinggi sebesar 0,78 ton/km2 dan nilai kepadatan rata-rata gastropoda tertinggi sebesar 5 ind/10m2 yaitu pada bulan Desember di stasiun C. Tingginya kepadatan dan biomassa tersebut dikarenakan tidak terjadi penyebaran yang tinggi pada bulan Desember. Pola distribusi dan biomassa gastropoda di perairan Sedati dipengaruhi oleh kondisi lingkungan, kondisi oseanografi dan kegiatan penangkapan oleh nelayan setempat. vi SKRIPSI POLA DISTRIBUSI DAN… SITI FADLIYAH IR-PERPUSTAKAAN UNIVERSITAS AIRLANGGA SUMMARY SITI FADLIYAH. Distribution Patterns and Biomass of Gastropods in Sedati Waters, Sidoarjo, East Java. Advisor Lecturer Yudi Cahyoko, Ir., M.Si. and Luthfiana Aprilianita Sari, S.Pi., M.Si. Indonesia is known as an archipelago which has 75% of sea and water areas. Indonesia has so much wealth for mollusks, one of which is gastropods. Sedati waters is one of the coastal areas of Sidoarjo Regency which has the potential of mollusk resources in the form of sea snails. Catching mollusks without thinking about the presence of mollusks can cause a decrease in mollusk populations which can affect the distribution patterns and biomass in the waters. The distribution pattern and biomass of gastropods in waters is determined by the abiotic environment, biotic, and gastropod tolerance to each environmental factor. This study aims to determine the distribution patterns and gastropod biomass in Sedati waters, Sidoarjo, East Java. This research uses observation method with descriptive analysis. Determination of sampling points using purposive sampling method. While sampling uses the Stratified Random Sampling method. The main parameters observed were distribution index (Id), density index (Q), and biomass index (B). The supporting parameters are water quality, oceanography (wind, currents and rainfall), substrate organic matter and substrate fraction. Gastropods found and dominant in Sedati waters in October to December are Natica vitellus, Notocochlis tigrina, Babylonia spirata, Turricula javana, Cryptospira ventricosa, Murex trapa, Rapana venosa, Nassarius olivaceus and Nassarius stolatus. Gastropod identification is done by measuring the length and weight, and looking at morphological characteristics using the reference book Abbott and Dance, Hossain et al. and World Register of Marine Species (WoRMS). Gastropod distribution patterns in Sedati waters have a uniform and group distribution patterns. Gastropod density in Sedati waters at station A, station B, and station C did not show a significant difference (p> 0.05). Gastropod density and biomass vii SKRIPSI POLA DISTRIBUSI DAN… SITI FADLIYAH IR-PERPUSTAKAAN UNIVERSITAS AIRLANGGA value at station C is greater than station A and station B with the highest value in December. The highest average gastropod biomass value is 0,78 ton/km2 and the highest average gastropod density value is 5 ind/10m2 which is in December at Station C. High density and biomass is caused by the absence of high distribution in December. Distribution Patterns and Biomass of Gastropods in Sedati Waters are influenced by environmental conditions, oceanographic conditions, and fishing activities by local fishermen. viii SKRIPSI POLA DISTRIBUSI DAN… SITI FADLIYAH IR-PERPUSTAKAAN UNIVERSITAS AIRLANGGA KATA PENGANTAR Puji syukur kehadirat Allah SWT atas limpahan rahmat dan hidayah-Nya, sehingga penulis dapat menyelesaikan Skripsi yang berjudul Pola Distribusi dan Biomassa Gastropoda di Perairan Sedati, Sidoarjo, Jawa Timur. Skripsi ini disusun berdasarkan hasil penelitian yang telah dilaksanakan di Perairan Sedati, Sidoarjo, Jawa Timur pada bulan Oktober hingga Desember 2019. Skripsi ini disusun sebagai salah satu syarat untuk memperoleh gelar Sarjana Perikanan pada Program Studi Akuakultur, Fakultas Perikanan dan Kelautan, Universitas Airlangga Surabaya. Penulis menyadari bahwa penulisan Skripsi ini masih jauh dari kata sempurna, sehingga kritik dan saran sangat penulis harapkan demi perbaikan dan kesempurnaan Skripsi ini. Penulis berharap semoga Skripsi ini dapat bermanfaat dalam memberikan informasi bagi masyarakat luas. Surabaya, 12 April 2020 Penulis ix SKRIPSI POLA DISTRIBUSI DAN… SITI FADLIYAH IR-PERPUSTAKAAN UNIVERSITAS AIRLANGGA UCAPAN TERIMAKASIH Penulis menyadari bahwa dalam penyusunan Skripsi ini tidak terlepas dari dukungan orang-orang terdekat penulis. Melalui kesempatan ini, penulis menyampaikan terima kasih kepada Allah SWT karena telah melimpahkan rahmat-Nya kepada penulis sehingga dapat menyelesaikan Skripsi ini dengan tepat waktu dan juga ucapan terima kasih kepada: 1. Ibu Prof. Dr. Mirni Lamid, drh., MP., selaku Dekan Fakultas Perikanan dan Kelautan Universitas Airlangga Surabaya. 2. Bapak Yudi Cahyoko, Ir., M.Si., Ibu Luthfiana Aprilianita Sari, S.Pi., M.Si. dan Bapak Kustiawan Tri Pursetyo, S.Pi., M.Vet. selaku dosen pembimbing yang telah memberikan bimbingan, arahan dan saran hingga terselesaikannya laporan Skripsi ini. 3. Bapak Boedi Setya Rahardja, Ir., MP., Ibu Rahayu Kusdarwati, Ir., M.Kes. dan Bapak Sudarno, Ir., M.Kes. selaku dosen penguji Skripsi. 4. Seluruh staf pengajar dan staf pendidikan Fakultas Perikanan dan Kelautan Universitas Airlangga. 5. Kedua orang tua tercinta Bapak Hasan dan Ibu Zainab yang memberikan dukungan tiada henti bagi kelangsungan perkuliahan saya. 6. Mohammad Isa Anshari yang selalu memberikan semangat dan doa hingga terselesaikannya laporan Skripsi ini. 7. Sahabat tersayang Rinjani, Firda, Prischa, Selyna dan Yuniar yang selalu ada sejak semester pertama. 8. Rekan penelitian Ayum, Hanum, Sindy, Nurul, Nanda, Eric, Kukuh, Bila, Cesar, Dimas, Fachrul dan Vina yang telah bekerja sama dengan baik dalam penelitian. 9. Serta teman-teman Orca yang sangat luar biasa. x SKRIPSI POLA DISTRIBUSI DAN… SITI FADLIYAH .
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