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All Journal EKSAKTA : Jurnal Penelitian dan Pembelajaran MIPA Jurnal Eduscience (JES)
Helentina Mariance Manullang
Fakultas Perikanan Universitas Dharmawangsa Medan
Agriculture, Biological Sciences & Forestry Education Other

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PENGARUH SUHU TERHADAP DERAJAT PENETASAN TELUR IKAN MASKOKI Carassius auratus (Linnaeus, 1758) Helentina Mariance Manullang
JURNAL EDUSCIENCE (JES) Vol 6, No 2 (2019): Jurnal Eduscience (JES)
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (441.706 KB) | DOI: 10.36987/jes.v6i2.1415

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh suhu terhadap derajat penetasan telur ikan maskoki Carassius auratus (Linnaeus, 1758), dan untuk mengetahui suhu terbaik yang menghasilkan derajat penetasan tertinggi ikan maskoki. Penelitian dilaksanakan di Laboratorium Basah Fakultas Perikanan Universitas Dharmawangsa. Penelitian ini menggunakan metode eksperimen dengan rancangan acak lengkap dengan 4 taraf perlakuan dan 3 ulanagan. Berdasarkan hasil analisis variansi diperoleh bahwa perlakuan suhu memberikan pengaruh sangat nyata terhadap derajat penetasan telur ikan maskoki. Hasil analisis variansi menunjukkan bahwa perlakuan suhu berpengaruh sangat nyata (Highly Significant),  terhadap derajat penetasan ikan mas koki.  Berdasarkan Uji Least Significant Difference (LSD), perlakuan terbaik adalah suhu 30 o C dengan derajat penetasan sebesar 93,67%.
KEPADATAN POPULASI DAN NISBAH KELAMIN IKAN BUTUH KELENG (Butis butis) DI SUNGAI BELAWAN Helentina Mariance Manullang; Khairul Khairul
Eksakta : Jurnal Penelitian dan Pembelajaran MIPA Vol 5, No 2 (2020): Eksakta : Jurnal Penelitian dan Pembelajaran MIPA
Publisher : Fakultas Keguruan Dan Ilmu Pendidikan, UM-Tapsel

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/eksakta.v5i2.91-97

Abstract

Belawan River stores a fairly high diversity of fish, one of which is the crazy fish (Butis butis). A study of the bioecology of crazy fish has not done in Indonesia. They are considering the lack of bioecology of this fish in Indonesia. At the same time, bioecology data is needed by various parties as data and important information to know the condition of the fish population in nature. The purpose of this research is to know the population density and genital ratio of fish need keleng in Belawan River. This research is exploration. The location of fish sampling used a purposive sampling method.  Fish arrested one time each month using a fishing rod. The collected fish are taken in total length and weight and identified the type of gender. Processing data using the application program Microsoft Excel 2010. The results showed the population density of fish at Station 1 (0.91 individual/m2), Station 2 (0.92 individual/m2, and station 3 (0.35 individual/m2). Sex ratio at Station 1, male fish (66%) and female (34%), Station 2, male fish (50,60%) and females (49,40%) and Station 3, male (50,77%) and females (49,23%).
Co-Authors Khairul Khairul