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Kebiasaan Makanan Beberapa Jenis Ikan di Ekosistem Mangrove Lubuk Kertang, Sumatera Utara Ananingtyas S Darmarini; Desrita Desrita; Onrizal Onrizal
Jurnal Kelautan Tropis Vol 26, No 2 (2023): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v26i2.16143

Abstract

Mangrove ecosystems are very important for coastal waters, one of which is as a provider of food sources for biota in the surrounding waters. This study aims to determine the food habits of several types of fish found in the waters around the Lubuk Kertang mangrove ecosystem, Langkat, North Sumatra. The research location is a mangrove restoration area with the main species Rhizopora apiculata. The research was conducted in January 2021. The collection of fish samples was carried out using gill net with 1.5 inchi which is commonly used by fishermen. Sampling was carried out by spreading the net three times. The tested fish samples consisted of 46 individuals with 12 species, 9 families, and 6 orders. The highest number of fish caught was Clupeiformes with a percentage of 41.67%, while the order found with a low percentage was Beloniformes (2%). The families found in large numbers were Mugillidae, the families found in low numbers were Lutjanidae and Serranidae. The species caught the most is Chelon subviridis. Stomach contents analysis was performed with the Index of Preponderance (IP). Based on the type of food found in the stomach contents of the test fish, there were various types of food consisting of 11 types, namely phytoplankton, zooplankton, squid, fish (juvenile fish), crabs, shrimp, shellfish, litter, moss, pieces of insect bodies, and plant parts. The types of food that the plant fragments are found in are 9 fish species, phytoplankton (7 species), shrimp (7 species), and litter (5 species).  Ekosistem mangrove sangat penting bagi perairan salah satunya adalah sebagai penyedia sumber makanan biota pada perairan di sekitarnya. Penelitian ini bertujuan untuk mengetahui kebiasaan makanan beberapa jenis ikan yang ditemukan di perairan sekitar ekosistem mangrove Lubuk Kertang, Langkat, Sumatera Utara. Lokasi penelitian merupakan merupakan wilayah restorasi mangrove dengan vegetasi utama Rhizopora apiculata. Penelitian dilakukan pada bulan Januari 2021. Pengumpulan sampel ikan dilakukan dengan menggunakan jaring gill net dengan ukuran 1.5 inchi yang biasa digunakan oleh nelayan. Sampling dilakukan dengan melakukan tiga kali tebar jaring. Sampel ikan uji terdiri dari 46 individu dengan 12 spesies, 9 famili, dan 6 ordo. Jumlah ikan terbanyak yang tertangkap adalah Clupeiformes dengan persentase sebesar 41.67%, sedangkan ordo yang ditemukan dengan persentase yang rendah adalah Beloniformes (2%). Famili yang ditemukan dalam jumlah besar adalah Mugillidae, famili yang ditemukan dengan jumlah rendah adalah Lutjanidae dan Serranidae. Spesies yang paling banyak tertangkap adalah jenis Chelon subviridis. Analisis isi perut dilakukan dengan Indeks of Preponderance (IP). Berdasarkan jenis makanan yang ditemukan pada isi perut ikan uji, terdapat berbagai jenis makanan yang terdiri dari 11 jenis yaitu fitoplankton, zooplankton, cumi-cumi, ikan (juvenil ikan), kepiting, udang, cangkang kerang, serasah, lumut, potongan tubuh serangga, dan potongan tubuh tumbuhan. Jenis makanan potongan tumbuhan terdapat pada 9 spesies ikan, fitoplankton (7 spesies), udang (7 spesies) dan serasah (5 spesies). 
Diversity and Abundance of Plankton From Peunaga, Cut Ujong Estuary, Meulaboh, West Aceh Eka Lisdayanti; Eko Perbowo Dian Hermawan; Ananingtyas S Darmarini; Rahmawati Rahmawati; Nurul Najmi
Juvenil Vol 5, No 1: Februari (2024)
Publisher : Department of Marine and Fisheries, Trunojoyo University of Madura, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/juvenil.v5i1.24657

Abstract

ABSTRACTThe research aims to determine the structure of the plankton community in the waters of Gampong Peunaga Cut Ujong, Meureubo, Meulaboh, West Aceh. The study was conducted in September 2023. The collection point consisted of 3 stations, and sampling was carried out at high tide with three repetitions. The filtering process uses a plankton net with a mesh size of 30 µm. Phytoplankton at the research location consists of five classes, namely Cyanophyceae, Euglenophyceae, Chlorophyceae, Bacillariophyceae, and Dinophyceae. Meanwhile, zooplankton consists of 7 groups consisting of Protozoa, Rotifera, Crustacea, Polychaeta, Gastropoda, Pelecypoda, and Nematoda. Phytoplankton has the highest percentage in the Bacillariophyceae class, reaching 71.7%, and the lowest 1% (Dinophyceae, Euglenophyceae, and Chlorophyceae). The abundance of phytoplankton at station three during the study ranged between 2,025,600 cells/m3 - 6,710,400 cells/m3 and zooplankton in the range of 23,400 ind/m3 - 33,480 ind/m3. The average diversity index (H') for phytoplankton was 1.04, the uniformity index (E) was 0.40, and the dominance index (C) was 0.50. Meanwhile, zooplankton has values H' (1.42), E (0.65), and D (0.36). To maintain the Peunaga estuary area as an ideal buffer area, it is recommended to regularly monitor the community structure of aquatic biota (plankton, benthos, and fish).Keywords: buffer ecosystem, community structure, dominance index, Navicula sp.
KEPADATAN MAKROZOOBENTOS DI PERAIRAN PEUNAGA RAYEUK, KECAMATAN MEUREUBO, KABUPATEN ACEH BARAT Sarah, Yuni; Najmi, Nurul; Darmarini, Ananingtyas S; Heriansyah, Heriansyah
JURNAL PERIKANAN TROPIS Vol 10, No 1 (2023)
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jpt.v10i1.4834

Abstract

Macrozoobenthos are aquatic organisms that live on the bottom and surface of the waters, and are influenced by bottom substrate and water quality. This study aimed at determining the density of macrozoobenthos in Peunaga Rayeuk Waters, Meureubo District, West Aceh Regency in terms of species composition, diversity, uniformity, and dominance. This research was conducted from May to June 2021 in the waters of Peunaga Rayeuk, Meureubo District, West Aceh Regency. Purposive random sampling was employed to collect the data in four stations. Based on the results of the study, 15 types of macrozoobenthos grouped into 3 classes were found, namely bivalves, gastropods and malokostraca. The macrozoobenthos density values at four stations ranged from 308.52 to 1357.49 ind/m2. The percentage value of macrozoobenthos composition by class showed that bivalves had the lowest percentage, as much as 13%, and the highest percentage was the gastropods, as much as 54%. The diversity index (H) ranged from 1.21 to 3.31 which was classified as medium to high category. The uniformity index (e) ranged from 0.81 to 0.92 and was classified as high category, while the Dominance Index (C) ranged from 0.21 to 0.54 and categorized as low to moderate category. The water quality parameter values was still in normal conditions and support the life of macrozoobenthos