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All Journal Al Jahiz: Journal of Biology Education Research Mantis Journal of Fisheries
Putri, Rahayu Dian Eka
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Social Sciences

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Development of a Constructivist-Oriented Teaching Module with Mind Maps for High School Biology Learning on the Excretory System Nengsih, Rodiantifitri; Qadariah, Nosi; Putri, Rahayu Dian Eka
Al Jahiz Vol 5 No 2 (2024): Al-Jahiz: Journal of Biology Education Research, July-December 2024
Publisher : Fakultas Tarbiyah dan Ilmu Keguruan UIN Jurai Siwo, Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32332/al-jahiz.v5i2.9711

Abstract

One of the efforts to bridge students' activities in constructing their knowledge is through constructivist-oriented modules equipped with mind maps. This research aims to develop a constructivist-oriented module with mind maps for the topic of the excretory system and to assess the validity, practicality, and effectiveness of the developed learning module. This study is a development research that employs the Four-D Models, which include the stages of Definition, Design, Development, and Dissemination, though the dissemination stage was not carried out. The results indicate that the constructivist-oriented module equipped with mind maps is valid, practical, and effective. The average module validation score is 3.54, the average practical test score by teachers is 3.23, the average practical test score by students is 3.54, and the effectiveness of the module can be observed from students' motivation, activity, and learning outcomes.
PERTUMBUHAN Nannochloropsis sp. YANG DIKULTUR PADA SKALA SEMI-MASSAL DAN MASSAL DI UPTD BPBALP TELUK BUO, PADANG, SUMATERA BARAT Virnando, Irvan; Bareta, Ainun Rohmawati; Lisna, Lisna; Pratama, Giri; Afkar, Zawil; Cahyono, Hari; Putri, Rahayu Dian Eka
Mantis Journal of Fisheries Vol. 2 No. 03 (2025): Desember 2025
Publisher : Department of Fisheries, Animal Science Faculty, Universitas Jambi.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/mjf.v2i03.50125

Abstract

Natural feed plays a crucial role as a primary nutrient source that is easily digested and suitable for the physiological needs of larvae during early life stages. Nannochloropsis sp. is widely used as a main natural feed for larvae of various aquaculture commodities, making its stable and high-quality availability essential for hatchery success. This study aimed to evaluate Nannochloropsis sp. culture techniques at semi-mass and mass scales and to determine cell density as an indicator of feed quality. The study employed direct observation during the culture period and descriptive analysis of cell density and water quality. Culture procedures at both scales included tank preparation, seawater filling, inoculation, cell density measurement, and harvesting, with differences only in tank size and inoculum volume. Results showed that peak cell density on day five reached 42,326,000 cells/mL in the semi-mass scale and 39,400,000 cells/mL in the mass scale, followed by a decline on day six. The study concludes that the Nannochloropsis sp. culture technique applied at UPTD BPBALP Teluk Buo is effective in supporting phytoplankton supply for hatchery operations.
Co-Authors Afkar, Zawil CAHYONO, HARI Lisna, Lisna Nengsih, Rodiantifitri Pratama, Giri Qadariah, Nosi Rohmawati Bareta, Ainun Virnando, Irvan