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All Journal Jurnal Mangifera Edu Jurnal Pembelajaran dan Biologi Nukleus Reswara: Jurnal Pengabdian Kepada Masyarakat Bioscientist : Jurnal Ilmiah Biologi Jurnal Aquaculture Indonesia
Helentina Mariance Manullang
Universitas Dharmawangsa
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Economics, Econometrics & Finance Education Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Social Sciences Veterinary

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PENGARUH PEMBERIAN DEBOK PISANG DAN EKSTRAK KACANG PANJANG DENGAN DOSIS YANG BERBEDA SERTA KOMBINASINYA TERHADAP KEPADATAN DAN INDEKS KEANEKARAGAMAN KULTUR INFUSORIA Reza Eka Wardana; Emmy Syafitri; Helentina Mariance Manullang
Jurnal Aquaculture Indonesia Vol 2, No 1 (2022)
Publisher : Prodi Akuakultur Fakultas Perikanan Universitas Dharmawangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46576/jai.v2i1.2048

Abstract

Penelitian Ini dilaksakan pada bulan Februari – Maret 2022, bertempat di Laboratorium Basah Fakultas Perikanan Universitas Dharmawangsa. Penelitian ini bertujuan untuk mengetahui pengaruh, dosis dan indeks keanekaragaman dalam pemberian debok pisang dan ekstrak kacang panjang dengan dosis yang berbeda terhadap kepadatan kultur infusoria. Metode yang digunakan pada penelitian ini adalah metode Rancangan Acak Lengkap (RAL) dengan 4 perlakuan dan 3 ulangan. perlakuannya yaitu : P1= Kontrol (tanpa perlakuan), P2 = Debok pisang 110 gr, P3 = Ekstrak kacang panjang 110 ml/l, P4 = Kombiansi antara debok pisang dan ekstrak kacang panjang 55 gr - 55 ml. Berdasarkan hasil penelitian kepadatan sel tertinggi infusoria yaitu P3 sebanyak (357,66x104 sel/ml), sedangkan untuk kepadatan yang terendah yaitu di P1 sebanyak 16,33x104 sel/ml). Dan untuk laju pertumbuhan harian yang tertinggi yaitu pada perlakuan P3 sebanyak 3,76 sel/ml/hari, dan yang terendah terdapat di P1 sebanyak sebanyak 2,08 sel/ml/hari. Pada penelitian ini, terdapat 2 jenis infusoria yaitu Paramecium sp dan Volvox sp. Kesimpulannya yaitu pengaruh pemberian debok pisang dan ekstrak kacang panjang dengan dosis yang berbeda menunjukan bahwa FHit > FTabel yaitu: 54,936 > 7,59 pada taraf 1% yang berarti berpengaruh sangat nyata (higly-significant) terhadap populasi serta kepadatan infusoria
Effectiveness of Fish Meal Substitution Using Maggot Meal in Floating Pellets on The Growth and Life Survival of Tilapia Fish (Oreochromis niloticus) Florentina Pauli Sirait; Dwi Tika Afriani; Helentina Mariance Manullang
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 10, No 2: Jurnal Pembelajaran Dan Biologi Nukleus July 2024
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v10i2.5836

Abstract

This research was conducted in February-March 2023, at the Dharmawangsa University Laboratory. The purpose of this study was to determine the effectiveness of fish meal substitution using maggot flour in floating pellets on growth, life expectancy of tilapia and FCR (Food Conversion Ratio). Tilapia is widely cultivated by the community so that it has economic value with high market demand. The high price of feed causes many farmers to suffer losses. To overcome the problem of losses, cultivators use maggot as a substitute for fish meal to be used as a local raw material which has the advantage of being relatively cheap, high protein and increasing the digestibility of fish. The research method used experimental methods with the treatment of artificial feeding with fish meal protein sources and maggot flour protein sources and analyzed using the T test. The results of absolute growth research on fish meal pellets were 3.5 and maggot flour pellets 3.6. This shows that maggot flour can be used as a local raw material in the manufacture of fish feed. The results of the survival rate of tilapia by giving fish meal pellets were 60% and giving maggot flour pellets was 55%. Fish meal pellets and giving maggot flour pellets show that they can support the basic needs of fish and can support fish life. The results of the study showed that the FCR value for fish meal pellets was 1.36 and for maggot flour pellets was 1.36.
Effect of Post-Fertilization Timing of a 40°C Heat Shock on the Hatching Rate of Common Carp (Cyprinus carpio Linnaeus, 1758) Eggs Rizki Abdillah Muhammad; Bambang Hendra Siswoyo; Helentina Mariance Manullang
Bioscientist : Jurnal Ilmiah Biologi Vol. 14 No. 3 (2026): September
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v14i3.22372

Abstract

This study aimed to evaluate the effect of the timing of a 40°C heat shock applied at 5, 7, 9, and 11 min post-fertilization on the hatching rate of common carp (Cyprinus carpio) eggs. The experiment was conducted at the Fish Seed Center of Binjai City from April to June 2026 using a completely randomized design with four treatments and three replicates. The experimental unit was the incubation container, with three containers per treatment, 20 eggs per container, and 240 eggs in total, all obtained from a single broodstock pair. Data were analyzed using analysis of variance, polynomial contrasts, and the Least Significant Difference (LSD) test, and the findings were further verified using binomial logistic regression. Heat-shock timing had a highly significant effect on hatching rate (F(3,8) = 35.41; p < 0.001; ω² = 0.90). Mean hatching rates increased monotonically with later heat-shock application, reaching 35.00 ± 5.00%, 50.00 ± 10.00%, 76.67 ± 5.77%, and 86.67 ± 5.77% at 5, 7, 9, and 11 min post-fertilization, respectively. The linear component accounted for 97.3% of the treatment variation (p < 0.001). However, the hatching rate at 11 min did not differ significantly from that at 9 min (difference = 10.00%; LSD₀.₀₅ = 13.03). Therefore, the 11-min treatment produced the highest mean hatching rate among the treatments tested, but it cannot be considered the optimal timing. Because the experiment did not include an unshocked control group, the observed differences reflect the effect of heat-shock timing rather than the effect of heat shock relative to untreated eggs. These findings suggest that earlier heat shock may be more detrimental to embryonic development and should be further evaluated using an untreated control and a broader range of post-fertilization times.
Co-Authors Bambang Hendra Siswoyo Cikal Sudirman Alfager Telaumbanua Dwi Tika Afriani Emmy Syafitri Florentina Pauli Sirait Khairul Khairul Laureny Afrilianti Harefa Muamar Qodhi Anshori Manurung Pebry Aisyah Putri Batubara Pohan Panjaitan Reza Eka Wardana Rian Pratama Rizki Abdillah Muhammad Uswatul Hasan