Article Per Year (5 Year)
p-Index From 2019 - 2024
0.408
P-Index
This Author published in this journals
All Journal Jurnal Ilmiah Perikanan dan Kelautan Jurnal Kelautan Tropis Jurnal Perikanan Universitas Gadjah Mada
Namastra Probosunu
Department of Fisheries, Faculty of Agriculture, Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Immunology & microbiology

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
Struktur Komunitas dan Kelimpahan Fitoplankton dan Zooplankton pada Musim Penghujan di Zona Intertidal Pantai Selatan Yogyakarta Ratih Ida Adharini; Namastra Probosunu
Jurnal Kelautan Tropis Vol 24, No 2 (2021): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v24i2.10206

Abstract

Plankton is an organism that plays an important role as a water food reserve, which is influenced by environmental conditions. This study aims to determine the community structure, abundance and biodiversity of phytoplankton and zooplankton in the intertidal zone of south coast of Yogyakarta during the rainy season. The research was conducted at Pantai Drini, Kukup, and Sundak of Gunungkidul District during December 2016 - February 2017. Sampling was conducted on three observation stations in the intertidal zone of Drini Beach, Kukup, and Sundak twice a month. The water samples were taken with plankton nets number 25, then were fluidized in 4% formalin and stored at low temperatures. The results showed diversity index of plankton in Kukup Beach in January at 1.86 while the lowest value in February at Sundak Beach was 0.87. The highest plankton abundance in January at Sundak Beach was 900 individu L-1 while the lowest value in December at Kukup Beach was 217.8 individu L-1. Based on the diversity index of Shannon-Wiener, intertidal coast waters of Yogyakarta in wet season is categorized as moderate, and dominance index is categorized  as low. Plankton merupakan organisme yang berperan penting sebagai cadangan makanan perairan dan dipengaruhi oleh kondisi lingkungan. Penelitian ini bertujuan untuk mengetahui struktur komunitas, kelimpahan dan keanekaragaman plankton pada zona inertidal pantai selatan Yogyakarta selama musim penghujan. Penelitian dilakukan di Pantai Drini, Kukup, dan Sundak Kabupaten Gunungkidul selama bulan Desember 2016 – Februari 2017. Pengambilan sampel dilakukan pada tiga stasium pengamatan di zona intertidal Pantai Drini, Kukup, dan Sundak setiap dua minggu. Sampel air diambil dengan jaring plankton nomor 25, kemudian sampel plankton difiksasi dalam formalin 4% dan disimpan pada suhu rendah. Hasil penelitian menunjukan indeks keanekaragaman jenis plankton tetinggi di Pantai Kukup pada bulan Januari sebesar 1,86 sedangkan nilai terendah pada bulan Februari di Pantai Sundak sebesar 0,87. Kelimpahan plankton tertinggi pada bulan Januari pada Pantai Sundak sebesar 900 individu L-1 sedangkan nilai terendah pada bulan Desember di Pantai Kukup yaitu 217,8 individu L-1. Berdasarkan indeks keanekaragaman Shannon-Wienner maka indeks keanekaragaman di pantai selatan Yogyakarta tergolong rendah-sedang dengan indeks dominansi tergolong rendah.
The Effectiveness of Seaweeds as Biofilter for Reducing Wastewater Nutrient and Preventing Water Pollution from Hybrid Grouper Culture Ratih Ida Adharini; Murwantoko Murwantoko; Namastra Probosunu; Riza Yuliratno Setiawan; Tony Budi Satriyo
Jurnal Ilmiah Perikanan dan Kelautan Vol. 13 No. 2 (2021): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v13i2.28105

Abstract

Highlight ResearchWastewater in hybrid grouper culture should be maintain before resirculate and dispose to aquatic environment to avoid eutrophication.Seaweed that is used for biofilter must be observed for its suitability, performance and effectivity.Ulva sp. has the best effectiveness to reduce nutrient in wastewater of hybrid grouper aquaculture by absorbing then stored into thallus.Ulva sp. is proven has the best SGR and adaptability in wastewater of hybrid grouper culture.AbstractWastewater generated from hybrid grouper culture needs to be managed to improve water quality before being recirculated, or discharged in the aquatic environment. Seaweed biofilter has been proposed in wastewater treatment technology for marine fish farming. This study aimed at comparing which of these species i.e. Ulva sp., Sargassum sp., Gelidium sp., and Dictyota sp.  work best to absorb nutrient wastewater hybrid grouper culture. This research utilized these seaweed as treatments and controls with three replications using Completely Randomized Design. A statistical analysis was conducted to investigate the significant differences in the nutrient absorptions among various seaweed species by using ANOVA and least significant difference. Non-parametric tests namely Kruskal-Walis, Mann-Whitney, and t-test were used with confidence interval of 95%. The results revealed that Ulva sp. has the best ability to reduce the Nitrogen 80%, while Dictyota able to reduce  Phosphor 88% by Dictyota sp. generated from wastewater of hybrid grouper culture. While the highest absorbtion of Total Kjeldahl Nitrogen (104%) and phosphate (182%) that stored in thallus were performed by Ulva sp. Ulva sp. had the best performance and highest growth rate (1.9% d-1) as biofilter in hybrid grouper cultivation than other species.
SEBARAN LOKASI PENELURAN PENYU HIJAU (Chelonia mydas) DI PULAU SANGALAKI KEPULAUAN DERAWAN KABUPATEN BERAU Andi Ibrahim; Djumanto Djumanto; Namastra Probosunu
Jurnal Perikanan Universitas Gadjah Mada Vol 18, No 2 (2016)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.26214

Abstract

Populasi penyu hijau (Chelonia mydas) yang bertelur di kawasan konservasi kepulauan Derawan semakin menurun disebabkan oleh berbagai faktor. Penelitian ini bertujuan untuk mengetahui jumlah peneluran tiap induk penyu hijau dan korelasinya terhadap naungan, lebar pantai berpasir dan fase bulan. Penelitian ini dilakukan pada tanggal 24 Januari–31 Maret 2015 berlokasi di Pulau Sangalaki. Pengamatan induk bertelur dilakukan dengan menyusur pantai tiap malam untuk menemukan induk yang sedang bertelur. Pada induk yang sudah bertelur, maka sarangnya diberi tanda di lokasi tempat bertelur. Pada hari berikutnya dilakukan penggalian sarang, pengambilan telur, dan pengukuran kondisi lingkungan tempat peneluran. Data yang dikumpulkan adalah jumlah telur tiap sarang dan kondisi lingkungan tempat peneluran. Kondisi lingkungan yang diukur meliputi kedalaman sarang, suhu substrat, jarak sarang terhadap naungan dan garis pantai saat surut terendah. Analisis data dilakukan secara deskriptif terhadap jumlah telur dan parameter lingkungan. Hasil penelitian menunjukkan rerata jumlah telur tiap sarang sebanyak 97 butir dengan kisaran 45–127 butir, ukuran panjang karapas 96 cm dengan kisaran 86-107 cm, rerata kedalaman sarang 73 cm dengan kisaran 56-87 cm. Penyu yang bertelur semakin banyak akan menggali sarang semakin dalam, namun tidak ada korelasi antara panjang karapas dengan jumlah telur. Jumlah rerata induk penyu hijau yang bertelur di Pulau Sangalaki adalah 486 ekor/bulan dengan kisaran 168–1085 ekor/bulan. Musim barat dan timur mempengaruhi frekuensi peneluran. Frekuensi peneluran terjadi sepanjang tahun dan frekuensi peneluran paling tinggi terjadi pada bulan Agustus yang bertepatan dengan puncak musim Timur. Frekuensi peneluran pada musim Timur empat kali lebih banyak daripada saat musim Barat. Frekuensi pendaratan penyu hijau tidak dipengaruhi oleh fase bulan. Berdasarkan lokasi penyu hijau bertelur, pantai yang banyak dipilih untuk lokasi bertelur terdapat di sebelah barat laut, timur laut dan selatan Pulau Sangalaki. Sarang penyu hijau lebih banyak ditemukan pada daerah naungan vegetasi (64%) daripada daerah pasir terbuka (36%).
Komunitas Krustasea di Kawasan Mangrove Desa Jangkaran Kabupaten Kulon Progo Sholihat Amalia; Djumanto Djumanto; Namastra Probosunu
Jurnal Perikanan Universitas Gadjah Mada Vol 19, No 2 (2017)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.26968

Abstract

The objective of this study was to determine the diversity and abundance of krustaseans in the mangrove area of Jangkaran Village, Temon District, Kulon Progo Regency. Sampling was done bi-weekly from October 2016 to February 2017 on six stations defined by ecological character. Krustasean sampling was done using cest net, trap net and hand picking along the river with the extent of each collection station about 10 m2. The captured krustasean samples were cleaned, stored in ice-cooled boxes and transported to the laboratories to be identified and grouped according to species, then measured by carapace length and individual weight. Observation of aquatic environment was done by measuring temperature, brightness, water depth, current velocity, pH, salinity, dissolved oxygen, and substrate type. The results of the observation obtained 1 order, 7 families, and 26 species. The family krustaseans found were Coenobitidae, Diogenidae, Grapsidae, Ocypodidae, Palaemonoidae, Penaeidae, and Portunidae. The most dominant species of krustaseans were white shrimp (Penaeus merguiensis) as much as 25.06%, hermit crab (Clibanarius sp.) as much as 10.85%, and Uca annulipes as much as 10.59%. The fewest species of krustaseans found were Varuna yui of 0.13% and Ocypode sp. as much as 0.26%. The abundance value was 25.4 ind / m2, indices of diversity 2.60, richess index 0.87 and index of dominance 0.18.
Co-Authors Andi Ibrahim Djumanto Djumanto Djumanto Djumanto Murwantoko . Ratih Ida Adharini Riza Yuliratno Setiawan Sholihat Amalia Tony Budi Satriyo