Widyastuti Umar
Departemen Ilmu Kelautan, Fakultas Ilmu Kelautan Dan Perikanan, Universitas Hasanuddin

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

Kerapatan Clathria reinwardti dan Spheciospongia inconstans di Reef Flat Pulau Barranglompo, Kepulauan Spermonde, Makassar Abdul Haris; Widyastuti Umar; Reski Adiguna; Andi Muh. Agung Pratama
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.v24i2.10761

Abstract

This study aims to determine the density of the sponges Clathria reinwardti and Spheciospongia inconstans in the reef flat of Barranglompo Island, Spermonde Archipelago, Makassar. The method used is belt transect using a roll meter as a reference for distance. The starting point of the roll meter ± 50 m from the shoreline is drawn perpendicularly to the end of the reef reef by 3 transects with a distance of ± 50m between the roll meters. At each 25m interval the observations were made using a belt transect size of 15m × 5m as the limit of the observation. In each quadrant transect, were done first is documenting of each sponge then count the number of species present in each quadrant. The results showed that the density of Clathria reinwardti at stations I and II were 0.13 and 0.14 m-2 respectively and were not significantly different, while those at stations III and IV were 0.25 and 0.31 m-2 respectively and not significantly different. Station I and II are significantly different from stations III and IV. The density of Spheciospongia inconstans at station I 0.02 m-2, station II 0.14 m-2, station III 0.67 m-2, and station IV 0.44 m-2. The sponge density of S. inconstans between stations was significantly different. The density of C. reinwardti at stations III and IV was higher and significantly different than stations I and II, while the highest density of S. inconstans was found at station III followed by station IV, station II, and station 1, and was significantly different among the four stations.  Penelitian ini bertujuan untuk mengetahui kerapatan spons Clathria reinwardti dan Spheciospongia inconstans di reef flat Pulau Barranglompo, Kepulauan Spermonde, Kota Makassar. Metode yang digunakan adalah belt transect dengan menggunakan roll meter sebagai acuan jarak. Titik awal roll meter ±50 m dari garis pantai secara tegak lurus ditarik sampai batas akhir reef reef sebanyak 3 transek dengan jarak ±50m antar roll meter. Pada setiap interval 25m pengamatan dilakukan menggunakan belt transect ukuran 15m × 5m sebagai batasan pengamatan. Pada setiap transek kuadran, pertama-tama yang dilakukan adalah mengambil gambar setiap spons kemudian menghitung jumlah jenis yang terdapat pada setiap kuadran. Hasil penelitian, kerapatan spons Clathria reinwardti di stasiun I dan II masing-masing 0.13 dan 0.14 m-2 dan tidak berbeda nyata, sedangkan di stasiun III dan IV masing-masing 0.25 dan 0.31 m-2 dan tidak berbeda nyata. Stasiun I dan II berbeda nyata dengan stasiun III dan IV. Kerapatan spons Spheciospongia inconstans  pada stasiun I 0.02 m-2, stasiun II 0.14 m-2, stasiun III 0.67 m-2, dan stasiun IV 0.44 m-2. Kerapatan spons Spheciospongia inconstans antar stasiun berbeda nyata. Kerapatan Clathria reinwardti pada stasiun III dan IV lebih tinggi dan berbeda nyata daripada stasiun I dan II, sedangkan kerapatan Spheciospongia inconstans tertinggi didapatkan pada stasiun III disusul kemudian stasiun IV, stasiun II, dan stasiun 1, serta berbeda nyata di antara keempat stasiun tersebut.
Low Genetic Diversity Study on Leopard Coral Grouper Plectropomus leopardus (Perciformes: Serranidae) from Sulawesi, Indonesia Andi Aliah Hidayani; Asmi Citra Malina A. R. Tasakka; Widyastuti Umar; Md. Jobaidul Alam; Amit Kumer Neogi; Sapto Andriyono
Jurnal Ilmiah Perikanan dan Kelautan Vol. 14 No. 2 (2022): 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.v14i2.32815

Abstract

Highlight ResearchThe leopard coral grouper Plectropomus leopardus was identified and analysed based on molecular approach.Genetic diversity within two regions in Gorontalo, Sulawesi successfully performed using connectivity analysis.Three haplotypes of Plectropomus leopardus from two region in Gorontalo as one of economical important marine fish species. AbstractBar-cheek coral trout (P. leopardus) is the flagship of the grouper in the live fish market in Asia. Unfortunately, the potential of the grouper is still partly produced from natural catches. Even though hybridisation activities have also started to be carried out, there still have not been many studies on the genetic diversity of these fish. The application of molecular identification has been widely applied in marine aquatic animal species, which are very likely to occur due to errors in terms of shape and colour in the morphological character. DNA information has been beneficial in efforts to the breeding program and develop grouper aquaculture activities. DNA barcoding was used for the molecular identification and haplotype analysis of P. leopardus from two locations in Gorontalo, Sulawesi, Indonesia. A total of 14 fish samples were collected from two traditional fish markets around Kwandang and Sumalata Gulf in the northern part of Gorontalo Province, Sulawesi. This study identified and found three haplotypes from both regions. Molecular identification using Cytochrome c Oxidase subunit I (COI) gene region on mitochondrial DNA. Besides Mega7 for phylogenetic reconstruction, the data analysis using DnaSP6, Arlequin Ver.3.5.2.2, and Network 5.0.1.1. The first Haplotype is a mixed population between the Kwandang Gulf and the Sumalata Gulf, then the Kwandang Gulf haplotype and the Sumalata Gulf haplotype. The genetic distance between Kwandang Gulf haplotype and Sumalata Gulf haplotype is 0.003984, classified as a shallow genetic distance and needs more samples from another region to figure out leopard coral grouper around Indonesia.