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Mollusk Diversity in Percut Sei Tuan Silvofishery Ponds, North Sumatra, Indonesia Ipanna Enggar Susetya; Mohammad Basyuni; Muhammad Rakezza Rifzy Rifzy; Rizka Amelia; Yuntha Bimantara; Rusdi Leidonald; Amanatul Fadhilah
Jurnal Ilmiah Perikanan dan Kelautan Vol. 15 No. 2 (2023): 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.vi.37772

Highlight Research We found 16 species of mollusks with a total of 15 species from the gastropod class and 1 species from the Bivalvia class bivalves in the silvofishery ponds, recording a total of 369 individuals. The density of mollusks in July in pond I was 3.6 ind/m2, while it was 10.66 ind/m2 in pond II. The mollusk diversity index in October after rehabilitation was included in the high diversity category because the value of H' was 1.6 - 3.0. Pond I has a diversity index value of 1.89 and pond II 1.82. The value of C-organic concentration in both ponds ranged from 3.00% to 5.72%, which is the optimum level for mollusk growth. Abstract Silvofishery is a system that combines mangrove and fishery to protect mangrove ecosystems and restore their functions, one of which is as a habitat for macrozoobenthos. Investigate the mollusks and mangrove density. Mollusk sampling was carried out on sub-plots measuring 1 x 1 m² in the mangrove vegetation transect, and mangrove density was measured by counting the number of trees directly on all of the mangrove species at two silvofishery ponds. A total of 16 species of mollusks were found at the observation site, consisting of gastropods and bivalves. The density of mollusks in July was 20 ind/m2 in pond I, while it recorded 9 ind/m2 in pond II. In October, after pond II rehabilitation, the density was inversely proportional to July, and the highest density was found in pond I at 10 ind/m2, while pond II measured 9 ind/m2. After rehabilitation, the index value H' decreased in pond I and pond II from 2.82 and 2.98 to 2.52 and 2.68, respectively. The mangrove density was 887 ind/ha in pond I and 686 ind/ha in pond II. The substrate in both ponds was clay. Nitrate concentration values "‹"‹in the substrate in both ponds ranged from 0.27% to 0.29%, phosphate recorded a percentage of 0.07–0.09%, and C-organic ranged from 3.00% to 5.72%. The water's physicochemical parameters and the type and content of the substrate were still suitable for mollusk life.

Alginate Profile, Antioxidant, and Antibacterial Activities of Brown Algae Sargassum cristaefolium from Pane Island, North Sumatera Astrid Fauzia Dewinta; Ipanna Enggar Susetya; Khairunnisa Khairunnisa; Mai Suriani; Syahira Addina; Amanatul Fadhilah
Jurnal Ilmiah Perikanan dan Kelautan Vol. 15 No. 2 (2023): 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.v15i2.41621

Highlight Research Alginate content produced by Sargassum cristaefolium in three different parts of the thallus has food grade quality. The alginate chemical profile of cristaefolium in three different thallus part had a significant effect. Antioxidant activity of cristaefolium extract was in the moderate category. Antibacterial activity of cristaefolium extract against aquatic pathogenic bacteria has moderate and strong effectiveness. Abstract Sargassum, an ubiquitous variant of algae in North Sumatera, has grown wildly on Pane Island with the type, namely, Sargassum cristaefolium. This study aimed to determine the characteristics of alginates, antioxidative ability, and antibacterial ability. Alginate was extracted via the acid pathway method from three different parts of the thallus and was then characterized physically and chemically. Antioxidant activity using the DPPH method and the total phenol with a gallic acid standard. Antibacterial activity using the well diffusion method. The characteristics of alginate include yields of 53.61% ± 2.21%, viscosity of 11.44 ± 1.54 cPs, whiteness index of 56.55 ± 1.71, acidity degrees of 9.83 ± 0.34, moisture content of 9.63% ± 0.53%, ash content of 23.17% ± 0.76%, Pb and Hg levels of 0.065 ± 0.01 ppm, 0.034 ± 0.003 ppm. The IC50 value of antioxidant activity being 134.408 ± 0.04 ppm, moderate category. Extract concentration of 8 mL can inhibit the E. coli and E. tarda with inhibitions of 10.60 ± 0.72, 14.03 ± 2.97 mm. Although other pathogenic bacteria can be inhibited optimally at an extract concentration of 10 mL with inhibitions of 11.03 ± 1.43, 9.07 ± 0.20, 11.20 ± 1.56, 12.80 ± 3.01 mm. Alginates isolated in S.cristaefolium from Pane Island met food grade standards except for its viscosity. S. cristaefolium from Pane Island is a moderate antioxidant. Likewise, its antibacterial ability was moderate however it was strong against aquatic gram-negative bacteria.

MORFOMETRI DAN BATIMETRI DANAU PALAS ASRI KECAMATAN MEDANG DERAS KABUPATEN BATUBARA Rusdi Leidonald; Ade Septiya Jumiani Rambe; Ahmad Muhtadi; Amanatul Fadhilah
AQUACOASTMARINE: Journal of Aquatic and Fisheries Sciences Vol. 3 No. 1 (2024): AQUACOSTMARINE: Journal of Aquatic and Fisheries Sciences
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jafs.v3i1.14645

Morfometri danau merupakan karakteristik fisik dari badan danau yang dapat menggambarkan berbagai potensinya. Tujuan dari penelitian ini adalah untuk mengetahui aspek morfometri dan batimetri di perairan Danau Palas Asri Kecamatan Medang Deras Kabupaten Batubara. Penelitian ini dilakukan pada bulan Oktober sampai November 2022. Pengambilan data yang dilakukan pada penelitian ini adalah data keliling danau, data kedalaman, panjang dan lebar danau, debit air serta kualitas air. Data-data tersebut diolah menggunakan Arcmap. Hasil dari penelitian ini adalah Danau Palas Asri (Danau A dan Danau B) secara berturut-turut memiliki luas 33.231 dan 26.544 , panjang maksimum 337,29 m dan 340,26 m, lebar maksimum 130,42 m dan 119,40 m serta panjang keliling danau 1.152,27 m dan 859,63 m. kedalaman maksimum 2,5 m dan 2,8 m, kemiringan rata-rata 4,72% dan 4,69%. Volume air danau yang dapat dimanfaatkan sebanyak 49.938,74 dan 44.062,64 dengan waktu tinggal air sekitar 20-21 hari dan 23-24 hari. Parameter kualitas fisika kimia air Danau Palas Asri (Danau A dan Danau B) secara berturut-turut adalah memiliki rata-rata Total Suspended Solid (TSS) 10,66 mg/L dan 9,33 mg/L, Total Dissolved Solid (TDS) 85,36 mg/L dan 67,96 mg/L, Daya Hantar Listrik (DHL) 15,36 S/cm dan 11,63 S/cm, Fosfat 0,10 mg/L dan 0,11 mg/L. Nilai TSI berkisar 16,05 - 21,10 status trofik Danau Palas Asri tergolong oligotrofik yaitu kondisi produktivitas dan unsur hara rendah. Kata Kunci : Batimetri, danau, kesuburan perairan, morfometri danau,

MORFOMETRI DAN BATIMETRI DANAU PALAS ASRI KECAMATAN MEDANG DERAS KABUPATEN BATUBARA Rusdi Leidonald; Ade Septiya Jumiani Rambe; Ahmad Muhtadi; Amanatul Fadhilah
AQUACOASTMARINE: Journal of Aquatic and Fisheries Sciences Vol. 3 No. 1 (2024): AQUACOSTMARINE: Journal of Aquatic and Fisheries Sciences
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jafs.v3i1.14645

Morfometri danau merupakan karakteristik fisik dari badan danau yang dapat menggambarkan berbagai potensinya. Tujuan dari penelitian ini adalah untuk mengetahui aspek morfometri dan batimetri di perairan Danau Palas Asri Kecamatan Medang Deras Kabupaten Batubara. Penelitian ini dilakukan pada bulan Oktober sampai November 2022. Pengambilan data yang dilakukan pada penelitian ini adalah data keliling danau, data kedalaman, panjang dan lebar danau, debit air serta kualitas air. Data-data tersebut diolah menggunakan Arcmap. Hasil dari penelitian ini adalah Danau Palas Asri (Danau A dan Danau B) secara berturut-turut memiliki luas 33.231 dan 26.544 , panjang maksimum 337,29 m dan 340,26 m, lebar maksimum 130,42 m dan 119,40 m serta panjang keliling danau 1.152,27 m dan 859,63 m. kedalaman maksimum 2,5 m dan 2,8 m, kemiringan rata-rata 4,72% dan 4,69%. Volume air danau yang dapat dimanfaatkan sebanyak 49.938,74 dan 44.062,64 dengan waktu tinggal air sekitar 20-21 hari dan 23-24 hari. Parameter kualitas fisika kimia air Danau Palas Asri (Danau A dan Danau B) secara berturut-turut adalah memiliki rata-rata Total Suspended Solid (TSS) 10,66 mg/L dan 9,33 mg/L, Total Dissolved Solid (TDS) 85,36 mg/L dan 67,96 mg/L, Daya Hantar Listrik (DHL) 15,36 S/cm dan 11,63 S/cm, Fosfat 0,10 mg/L dan 0,11 mg/L. Nilai TSI berkisar 16,05 - 21,10 status trofik Danau Palas Asri tergolong oligotrofik yaitu kondisi produktivitas dan unsur hara rendah. Kata Kunci : Batimetri, danau, kesuburan perairan, morfometri danau,

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