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SEKSUALITAS DAN PERKEMBANGAN GAMET SPONGE LAUT AAPTOS AAPTOS SCHMIDT Haris, Abdul; Soedharma, Dedi; Zamani, Neviaty P.; Pariwono, John I.; Rachmaniar, Rachmaniar
Jurnal Natur Indonesia Vol 14, No 3 (2012)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (271.347 KB) | DOI: 10.31258/jnat.14.3.205-211

Abstract

This research was aimed to know the characteristics of gamet development of marine sponge Aaptos aaptos living in tropical waters of Barrang Lompo Island, Spermonde Archipelago, South Sulawesi. In order to know gamet development, it was conducted three periods of sample collection at each moon phase. After sample collection, the specimen were put into tissue cassette and then were removed to fixative solution of FAACC (for 100 mL = 10 mL formaldehyde solution of 37?40%: 5 mL glacial acetic acid: 1.3 g calcium chloride dihydrate: 85 mL destilate water) for +48 hours, and then were removed to 70% alcohol for temporary storage before doing histological preparation following standard procedure. Sexuality of marine sponge Aaptos aaptos living in Barrang Lompo Island is gonochoric. Spermatocyt developed in spermatic cyst, while oocyt developed in the mesohyl. Stage of male gamet development was divided into four phases i.e. spermatocyt I phase, spermatocyt II phase, spermatocyt III phase, and spermatocyt IV (spermatid) phase, similarly, female gamet develop- ment was divided into four phases i.e. oocyt I phase, oocyt II phase, oocyt III, oocyt IV phase. Each phase of gamet development had specific characterstics different from among each others.
RESPONS SUHU PERMUKAAN LAUT DAN KLOROFIL-A TERHADAP KEJADIAN ENSO DAN IODM DI WILAYAH INDO-PASIFIK TROPIS Putra, Andry Purnama; Atmadipoera, Agus S.; Pariwono, John I.
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 12 No. 1 (2020): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2068.911 KB) | DOI: 10.29244/jitkt.v12i1.30693

Abstract

Fenomena anomali laut-atmosfer antar-tahunan dari El Nino Southern Oscillation (ENSO) dan Indian Ocean Dipole Mode (IODM) di wilayah Indo-Pasifik Tropis memberikan dampak pada ekosistem laut, hidrologi dan variabilitas iklim. Penelitian ini bertujuan untuk menganalisis pola spasial dan variabilitas temporal suhu permukaan laut (SPL) dan klorofil-a permukaan (Chl-a) terkait dengan ENSO dan IODM di Indo-Pasifik Tropis. Data deret waktu bulanan dari tahun 1980-2017 (37 tahun) diperoleh dari pusat data global, dan dianalisis menggunakan metode empirical orthogonal function (EOF). Hasil penelitian menunjukkan nilai tiga terbesar pertama dari SPL (Chl-a) menjelaskan 81,7% (76%) dari total explained variance. Struktur spasial SPL mode-1 (56%) membentuk seperti dua kutub asimetris antara timur dan barat Pasifik Tropis dengan pola yang berbeda di lepas Pantai Peru. Pola ini diduga berhubungan dengan tahun normal atau La Nina. Selanjutnya, kondisi EL Nino dan IODM diduga tergambarkan oleh SPL mode-2 (19%), dengan fase negatif dominan di atas ekuator Pasifik dan menghilangnya area upwelling di lepas Pantai Peru.