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All Journal JIPI (Jurnal IPA dan Pembelajaran IPA) Journal of Fisheries & Marine Biodik: Jurnal Ilmiah Pendidikan Biologi
Ihsan, Muhsinul
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Decision Sciences, Operations Research & Management Education Environmental Science Physics Social Sciences

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Assessment of Microalgal Biodiversity as Bioindicator of Aquatic Ecosystem Health in Kombal Bay, Lombok Island, Indonesia Jayanti*, Ervina Titi; Purwati, Nining; Ihsan, Muhsinul
Jurnal IPA & Pembelajaran IPA Vol 9, No 3 (2025): SEPTEMBER 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jipi.v9i3.48310

Abstract

A good aquatic environment will ensure the availability of clean water, prevent the spread of disease, and support the balance of marine and freshwater ecosystems. Determination of the health status of aquatic environments can use various chemical, physical, and biological parameters. Microalgae are commonly used as bioindicators of changes in the environmental quality of aquatic ecosystems because they have high sensitivity to chemical and physical changes that enter the water. One of the areas with high ecological and economic potential in Indonesia is Kombal Bay, located on Lombok Island, West Nusa Tenggara. This study aims to determine the health level of the Kombal Bay freshwater ecosystem using microalgae as bioindicators. This study is a descriptive exploratory study with qualitative and quantitative approaches. Microalgae determination uses the Algaebase online database guide, diversity analysis uses the Shannon-Wiener diversity index (H) and the evenness index (E). The results showed that there were 23 types of microalgae, the majority of which were members of Bacillariophyta, the diversity of the microalgae community was classified as moderate (H=1.37) with an uneven distribution of species (E=0.43). The combination of these various parameters indicates that the waters of Kombal Bay are lightly to moderately polluted and are starting to show ecological pressure
The Characteristics of Chitosan Derived from Lobster Shells and its Effect on Fungi Activity and Water Stability of Lobster Pellets Ihsan, Muhsinul; Harris, Ali; Mukminah; Megawati; Purwati, Nining; Muliasari, Handa; Priyambodo, Bayu; Jones, Clive; Nankervis, Leo
Jurnal Ilmiah Perikanan dan Kelautan Vol. 17 No. 2 (2025): 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.v17i2.57474

Abstract

Graphical Abstract   Highlights of Research The chitosan was successfully produced from lobster shells Panulirus homarus. The characteristics and quality of chitosan from lobster shells Panulirus homarus were observed. The anti-fungal activity of chitosan was assessed. Chitosan enhances the water stability of lobster pellets.       Abstract Tropical rock lobster aquaculture is a lucrative industry that is currently limited by the lack of appropriate formulated feed. Its nocturnal, benthic feeding behavior necessitates a water-stable feed that maintains integrity under tropical marine conditions without degrading. Chitosan, a biopolymer derived from lobster (Panulirus homarus) shells, has potential applications in aquaculture as an antifungal agent and feed binder. We report on the characteristics of chitosan extracted from the exoskeleton of spiny lobsters (Panulirus homarus), including its effect on fungal activity and water stability of pellets. Chitosan was produced through three main steps: deproteination, demineralization, and deacetylation. The resulting chitosan was characterized through crude composition (AOAC methods), FTIR spectra, and scanning electron microscope (SEM), while antifungal activity was assessed through in vitro assays. Chitosan was used to coat lobster feed pellets by immersion method at different concentrations (0%, 0,5%, 1%, 1,5%, and 2%), and its impact on pellet water stability was assessed. There were three replications in fungal activity and water stability test. The yield of chitosan was 5.9 ± 0.01% of the total shell mass, with 96.99% ± 0.01 degree of deacetylation (DD). The resulting product contained 5.94 ± 0.07% moisture, 36.72 ± 0.05% ash and 2.73 ± 0.08% nitrogen. Chitosan morphology was characterized as an irregular shape with dimensions ranging from 157 to 391 µm, with a combination of striated surface textures. Increasing concentration of chitosan increased water stability of pellets up to 1.5% inclusion, while 0.5% optimized Fusarium sp. inhibition. These findings suggest that chitosan from lobster shells can be sustainably utilized to enhance feed quality, reducing fungal contamination and nutrient leaching in aquaculture systems.
Pengembangan Media Ajar Kontekstual Berbasis Riset Osteoathritis: (The Development of Contextual Learning Media Based on Osteoarthritis Research) Ihsan, Muhsinul; Mukminah, Mukminah; Hadiatussolihah, Hadiatussolihah
BIODIK Vol. 10 No. 4 (2024): Desember 2024
Publisher : Program Studi Pendidikan Biologi FKIP Universitas Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/biodik.v10i4.36536

Abstract

Contextual learning media allows students to make a correlation between knowledge and their daily activities. This media has numerous benefits. However, it has not been developed by MA Banin and Banat Pondok Pesantren Thohir Yasin Lombok Timur. This study was aimed to develop a contextual learning media based on the research of correlation between osteoarthritis, dhuha prayer, and sunbathing. The research and development used 4-D model modified into 3-D, which is define, design, and develop. Research of osteoarthritis was conducted as part of define stage while poster design, validation, and product application were in the next two stages. Resulted poster have been categorized as an excellent poster and achieved positive responses from teachers and students. Learning results of students increase significantly after using the poster as a contextual learning media. This study has succeeded to develop contextual learning media with tremendous responses, and it has positive impacts on the learning results of students. Abstrak. Media pembelajaran kontekstual memilki kelebihan dalam membantu siswa menghubungkan pengetahuan dengan kehidupan sehari-hari. Pengembangan media kontekstual belum dilakukan dengan optimal di MA Banin dan Banat Pondok Pesantren Thohir Yasin Lombok Timur. Tujuan Penelitian ini adalah mengembangkan media ajar kontekstual berupa poster ilmiah berbasis riset pengaruh salat dhuha dan berjemur terhadap penurunan derajat osteoarthritis masyarakat di Desa Lendang Nangka. Model pengembangan yang digunakan adalah 4-D yang dimodifikasi menjadi 3-D, terdiri atas tahap define, design, dan develop. Riset osteoarthritis dilakukan pada tahap define, sedangkan desain poster, validasi, dan uji coba dilakukan pada tahap design dan develop. Poster yang dibuat dikategorikan layak oleh validator dan mendapatkan respon yang sangat baik dari pendidik dan peserta didik. Rata-rata hasil belajar siswa meningkat signifikan dengan N-gain score sebesar 0.40 dan 0.48 yang berada berada pada kategori peningkatan sedang. Media ajar kontekstual berbasis riset osteoarthritis berhasil dikembangkan dan mendapatkan respon sangat baik dari pendidik dan peserta didik. Media ajar ini mampu meningkatkan hasil belajar siswa secara signifikan.
Co-Authors Ali Harris, Ali Hadiatussolihah, Hadiatussolihah Jayanti*, Ervina Titi Jones, Clive Megawati Mukminah Mukminah, Mukminah Muliasari, Handa Nankervis, Leo Priyambodo, Bayu Purwati, Nining