Kondisi plankton pada tambak ikan kerapu di Desa Mesjid Lama Kecamatan Talawi Kabupaten Batu Bara, Sumtera Utara

Rumondang Rumondang, Epa Paujiah

Abstract


Abstract. Fishpond is one of the habitats from organisme such as plankton which is have a role as main food resources for organisms with high trophic level (such as fish). This objectives of the study were to determine the condition of plankton in grouper fishponds in Mesjid Lama Village, Talawi District, Batu Bara District. Plankton sampling and water quality measurements were carried out from February to June 2019. The abundance of phytoplankton in grouper fish ponds varied between 1,765-4,113 ind/L. The composition of phytoplankton species found during observation was dominated by diatom groups or Bacillariophyceae classes. The abundance of zooplankton in grouper ponds varied from 330-1,165 ind/L with the lowest abundance found at station 6 with a total of 330 ind/L and the highest abundance was found at station 4 with a number of 1,165 ind/L. The zooplankton genus that is often found is Acartia. Diversity value H '<1 then the value of diversity is small and the water community is low. Evenness value (E) close to value 1 indicates that the presence of plankton species in the fishpond of Kerapu is evenly distributed.
Keywords: Batu Bara, plankton, zooplankton, grouper ponds

Abstrak. Tambak ikan merupakan salah satu habitat organisme perairan seperti plankton yang salah satunya berperan sebagai sumberdaya makanan utama bagi organisme dengan tingkatan tropik di atasnya (termasuk ikan). Tujuan dari penelitian ini adalah untuk mengetahui kondisi plankton pada tambak ikan kerapu di Desa Mesjid Lama Kecamatan Talawi Kabupaten Batu Bara. Pengambilan sampel plankton dan pengamatan kualitas air dilakukan pada bulan Februari sampai Juni 2019. Kelimpahan fitoplankton di tambak ikan kerapu bervariasi berkisar antara 1.765-4.113 ind/L. Kelompok diatom atau kelas Bacillariophyceae merupakan komposisi jenis fitoplankton yang banyak ditemukan selama pengamatan. Kelimpahan zooplankton di tambak ikan kerapu bervariasi berkisar antara 330-1.165 ind/L dengan kelimpahan terendah ditemukan pada stasiun 6 dengan jumlah 330 ind/L dan kelimpahan tertinggi terdapat pada stasiun 4 dengan jumlah 1.165 ind/L. Acartia merupakan genus dari zooplankton yang sering ditemukan. Nilai keanekaragaman H’<1, maka nilai keanekaragaman kecil dan komunitas diperairan tersebut rendah. Nilai kemerataan (E) mendekati nilai 1 yang menunjukan bahwa keberadaan spesies plankton pada tambak ikan kerapu terdistribusi merata.
Kata kunci: Batu Bara, plankton, zooplankton, tambak kerapu merata

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DOI: https://doi.org/10.13170/depik.9.1.14282

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PUBLISHER ADDRESS:

Faculty of Marine and Fisheries
Universitas Syiah Kuala
Jalan Meureubo No. 1, Kopelma Darussalam
Banda Aceh, 23111, Indonesia

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Depik Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan is accredited by Direktorat Jenderal Penguatan Riset dan Pengembangan Kemenristekdikti Republic of Indonesia starts from Volume 7 Number 3, 2018 based on decree letter (SK) No. 30 / E / KPT / 2019, November 11, 2019 (Sinta  2 Grade)