Niken Tunjung Murti Pratiwi
1Department of Aquatic Resources Management, Faculty of Fisheries and Marine Sciences, Institut Pertanian Bogor

Published : 6 Documents
Articles

Found 6 Documents
Search

The potency of plankton as natural food for hard-lipped barb larvae (Osteochilus hasselti C.V.) Pratiwi, Niken Tunjung Murti; Winarlin, .; Frandy, Yuki Hana Eka; Iswantari, Aliati
Jurnal Akuakultur Indonesia Vol 10, No 1 (2011): Jurnal Akuakultur Indonesia
Publisher : Jurnal Akuakultur Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (279.993 KB)

Abstract

Plankton is aquatic organism that can be utilized as natural food. Hard-lipped barb is one of herbivorous fish that most of its life using plankton as its food source. Growing phytoplankton in pond can be conducted by providing nutrient source, such as fertilizing.  In this study, we examined the growth of hard-lipped barb larvae related to the existence of natural food in different fertilized ponds.  Four types of fertilizer were applied i.e. 100% organic fertilizer (PO), mixing of 85% organic and 15% inorganic fertilizer (PCa), mixing of 60% organic and 40% inorganic fertilizer, and 100% inorganic fertilizer (PA). Hard-lipped barb larvae were put into ponds after fertilizing process. Plankton was observed in ponds and larval intestines (Index of Preponderance and Ivlev Index). The growth of hard-lipped barb larvae was also observed. The result showed that larvae tend to utilize phytoplankton from the class of Bacillariophyceae and zooplankton in the early of its life. Utilizing plankton with those compositions as natural food in the early period generates a good growth performance.  The best performance of growth was shown by larvae in PA treatment which utilized most on zooplankton in the early period. Key words: fertilizer, natural food, hard-lipped barb, plankton   ABSTRAK Plankton merupakan organisme akuatik yang dapat digunakan sebagai sumber pakan alami. Ikan nilem merupakan salah satu jenis ikan herbivora yang hampir sepanjang hidupnya memanfaatkan plankton sebagai sumber makanannya. Cara untuk menumbuhkan fitoplankton di kolam adalah dengan menyediakan sumber nutrien, di antaranya melalui pemupukan. Oleh karena itu, penelitian ini dilakukan untuk mempelajari tingkat pertumbuhan larva ikan nilem berkaitan dengan keberadaan pakan alami yang ditumbuhkan pada media dengan jenis pupuk berbeda. Dalam penelitian ini diterapkan empat jenis pupuk berbeda, yaitu 100% pupuk organik (PO), campuran 85% pupuk organik dan 15% pupuk anorganik (PCa), campuran 60% pupuk organik dan 40% pupuk anorganik, dan 100% pupuk anorganik (PA).  Larva ikan nilem ditebar di kolam setelah proses pemupukan. Pengamatan dilakukan terhadap keberadaan plankton di kolam dan di usus (Indeks Preponderance dan Ivlev).  Di samping itu juga dilakukan pengamatan pertumbuhan larva.  Berdasarkan hasil penelitian diketahui bahwa fitoplankton dari kelas Bacillariophyceae dan zooplankton banyak dimanfaatkan oleh larva di awal hidupnya.  Pemanfaatan plankton dengan komposisi tersebut sebagai pakan alami di awal masa pemeliharaan menghasilkan pertumbuhan yang baik.  Larva dengan pertumbuhan yang paling baik ditunjukkan oleh perlakuan PA yang memanfaatkan zooplankton lebih besar di awal masa pemeliharaan. Kata kunci: ikan nilem, pakan alami, plankton, pupuk
Distribusi Spasial Fitoplankton di Perairan Pesisir Tangerang Wulandari, Dwi Yuni; Pratiwi, Niken Tunjung Murti; Adiwilaga, Enan Mulyana
Jurnal Ilmu Pertanian Indonesia Vol 19, No 3 (2014): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1948.006 KB)

Abstract

This study was conducted in describing the spatial distribution of phytoplankton in the coast of Tanggerang based on species composition and abundance. This study held on April and August 2013 in 10 sampling station. Sample survey method used to collect the data. Morisita Index of Dispersion used to describe the distribution pattern of phytoplankton and Bray-Curtis Index used to describe the similarity of sampling station based on its abundances of phytoplankton. Based on result of the study, the phytoplankton in the coast of Tangerang consist of three classes, which is Bacillariophyceae (24 genera), Dinophyceae (3 genera), and Cyanophyceae (2 genera). The result shows that the highest composition and abundance is from the species of Bacillariophyceae. The distribution pattern of phytoplankton is group distribution. The distribution of species of phytoplankton and its abundance is different even the sampling station is near each other and environmental parameters that influence. Keywords: phytoplankton, spatial distribution, the coast of Tangerang
Distribusi Spasial Fitoplankton di Perairan Pesisir Tangerang Wulandari, Dwi Yuni; Pratiwi, Niken Tunjung Murti; Adiwilaga, Enan Mulyana
Jurnal Ilmu Pertanian Indonesia Vol 19, No 3 (2014): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1948.006 KB)

Abstract

This study was conducted in describing the spatial distribution of phytoplankton in the coast of Tanggerang based on species composition and abundance. This study held on April and August 2013 in 10 sampling station. Sample survey method used to collect the data. Morisita Index of Dispersion used to describe the distribution pattern of phytoplankton and Bray-Curtis Index used to describe the similarity of sampling station based on its abundances of phytoplankton. Based on result of the study, the phytoplankton in the coast of Tangerang consist of three classes, which is Bacillariophyceae (24 genera), Dinophyceae (3 genera), and Cyanophyceae (2 genera). The result shows that the highest composition and abundance is from the species of Bacillariophyceae. The distribution pattern of phytoplankton is group distribution. The distribution of species of phytoplankton and its abundance is different even the sampling station is near each other and environmental parameters that influence.
Penentuan Daya Dukung Perairan untuk Perikanan Alami (Studi Kasus: Situ Cilala, Kabupaten Bogor) MZ, Novita; Soewardi, Kadarwan; Pratiwi, Niken Tunjung Murti
Jurnal Ilmu Pertanian Indonesia Vol 20, No 1 (2015): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1690.011 KB)

Abstract

This study aimed to assess the aquatic carrying capacity for extensive fishing. The study was conducted in Cilala Lake, Jampang Village, Bogor. The carrying capacity was determined based on primary productivity using the chlorophyll value, which is indicating the existence of phosphate in waters. The result showed that carrying capacity of Cilala Lake for extensive fishing was 3.51 tons/year. Tilapia was the fish which could be restocked, because it has high tolerance to waters condition and there’s not prey or predator for this fish. If fish for restocking was assumed about 25 g in size and would be about 250 g after 46 months (harvest size), then the maximum stocked was 15.602 fingerlings/year for two periods. The number of fish pen cage available on the lake should be considered in calculating the number of fish for restocking.
Produktivitas dan Serapan Nutrien Harian Spirogyra sp. dan Hydrodictyon sp. Pratiwi, Niken Tunjung Murti; Ayu, Inna Puspa; Nugraha, Bayu
JURNAL BIOLOGI INDONESIA Vol 12, No 1 (2016): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (821.599 KB) | DOI: 10.14203/jbi.v12i1.2325

Abstract

This research aimed to analyze the potency of primary productivity (PP) and daily nutrients uptake ofSpirogyra sp. and Hydrodictyon sp. The research was conducted using Randomized Block Design andCompletely Randomized Design. Randomized Block Design was used to determine the difference of PP ofboth filamentous microalgae in different time periods. Completely Randomized Design was used to determinethe difference of daily net primary productivity and total amount of nutrients utilization by both filamentousmicroalgae in the same light intensity. The observations showed that Spirogyra sp. dan Hydrodictyon sp. hassame PP (p>0,05), both in total (daily) and time periods. The morning PP of two filamentous microalgae weredifferent from the daylight (p<0,05), and the daylight has different value from the afternoon (p<0,05), but therewere similar value of PP between morning and afternoon (p>0,05). Spirogyra sp. and Hydrodictyon sp. hassimilar capability in uptaking nutrients daily and in time periods observations (p>0,05).Keywords: Hydrodictyon sp., nutrients, primary productivity, Spirogyra sp.
Struktur Komunitas Fitoplankton di Danau Toba, Sumatera Utara Rahman, Arif; Pratiwi, Niken Tunjung Murti; Hariyadi, Sigid
Jurnal Ilmu Pertanian Indonesia Vol 21, No 2 (2016): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (728.096 KB) | DOI: 10.18343/jipi.21.2.120

Abstract

Lake Toba is the largest lake in Indonesia, located in the Province of North Sumatra. Lake Toba is used to aquaculture, agricultural, tourism, and residential areas. These activities will produce organic and anorganic matter that can affect water quality and can cause eutrophication. Some indicators of eutrophication are an increase in phytoplankton biomass and changes in phytoplankton community structure. The aim of this study was to describe the phytoplankton community structure in Lake Toba. This study was conducted on 20-24 October 2014 at 23 stations around the Samosir Island, Lake Toba. The results showed that the phytoplankton abundance ranged 216-68.319.716 cells/m3. The phytoplankton composition consists of 35 genera from four classes: Cyanophyceae, Chlorophyceae, Bacillariophyceae, and Dinophyceae. Chyanophyceae is a dominant phytoplankton groups based on the composition of abundance (&gt;40%). Structure of phytoplankton communities in Lake Toba dominated by Anabaena.