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All Journal Reswara: Jurnal Pengabdian Kepada Masyarakat Bioscientist : Jurnal Ilmiah Biologi Jurnal Aquaculture Indonesia
Bambang Hendra Siswoyo
Fakultas Perikanan Universitas Dharmawangsa Medan
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Economics, Econometrics & Finance Education Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Social Sciences Veterinary

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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 Aksioman Jaya Hia Alvin Nandiko Ginting Aried Sumekar Ario Pandi Mollen Cikal Sudirman Alfager Telaumbanua Dedy Husrizal Syah, Dedy Husrizal Dwi Tika Afriani Eli Sartika Emmy Syafitri Filbert Ivan Hulu Helentina M Manullang Helentina M Manullang Helentina Mariance Manullang Helentina Mariance Manullang Irwanmay Irwanmay Kaisa Alhani Lubis M. Arif Rahman Muhd. Rizky Marpaung Pebry Aisyah Putri Batubara Retno Juli Pertiwi Rizki Abdillah Muhammad Sadarman Kristian Gea Toibbullah Siregar Tri Hadi Setiawan Tubagus Luthfianda Uswatul Hasan Uswatul Hasan Uswatun Hasan