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All Journal Bioscientist : Jurnal Ilmiah Biologi Equator Science Journal (ESJ)
Abd. Rauf
Universitas Tadulako
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Education Environmental Science Immunology & microbiology Physics Social Sciences

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Community Structure of Fiddler Crabs (Uca) in the Mangrove Ecosystem of Lalombi Village, South Banawa District, Donggala Regency Berlinda Austin Paliwan; Bustamin; Abd. Rauf; Syech Zainal; Moh Sabran; Raya Agni
Bioscientist : Jurnal Ilmiah Biologi Vol. 14 No. 1 (2026): March
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.v14i1.19867

Abstract

This study aimed to analyze the community structure of fiddler crabs (Uca) in the mangrove ecosystem of Lalombi Village, South Banawa District, Donggala Regency, and to utilize the research findings as instructional media in the form of a flipbook. This ecological study employed a quantitative descriptive approach based on community structure analysis, with samples collected using purposive sampling. The parameters analyzed included species composition, density, the Shannon–Wiener diversity index, the Simpson dominance index, and the evenness index, along with environmental variables such as temperature, salinity, pH, and substrate type. The results showed that the fiddler crab community in the mangrove ecosystem of Lalombi Village consisted of five species, namely Uca annulipes, Uca lactea, Uca forcipata, Uca tetragonon, and Uca dussumieri. Abundance varied across sampling stations, and the overall diversity level was classified as low to moderate. The occurrence frequency of these five fiddler crab species was very low. The recorded densities were 6 ind/m² for Uca annulipes, 3 ind/m² for Uca lactea, 5 ind/m² for Uca forcipata, 7 ind/m² for Uca tetragonon, and 3 ind/m² for Uca dussumieri, with a low dominance index. The environmental physicochemical conditions recorded for fiddler crab habitat were a temperature of 30°C, water pH of 8.25, salinity of 31, and a muddy substrate type. Overall, the fiddler crab community structure in the mangrove ecosystem of Lalombi Village was relatively stable, characterized by low to moderate diversity, low dominance, and a clumped distribution pattern influenced by substrate conditions and mangrove density.
The Abundance of Gastropoda in Bonebula Beach Central Banawa Sub-District and The Utilization as Learning Media Safaat Safaat; Musdalifah Nurdin; Syech Zainal; Abd. Rauf
Equator Science Journal Vol. 2 No. 3 (2024): Equator Science Journal (ESJ)
Publisher : CV. Dharma Samakta Edukhatulistiwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61142/esj.v2i3.135

Abstract

The objective of this study is to describe the abundance of gastropods in the marine waters of Bonebula Beach, Banawa Tengah Subdistrict, and to utilise the findings as a learning resource in the form of electronic pocket books. The research methodology employed is descriptive quantitative research, with the location determined through purposive sampling, resulting in the designation of three observation stations. Station 1 is situated within the seagrass ecosystem, Station 2 within the mangrove ecosystem, and Station 3 within the coral ecosystem. The sampling was conducted using a free collection method. The findings revealed the presence of 19 species of gastropods belonging to 13 families and six orders. The abundance of gastropods on Bonebula Beach is classified as moderate, representing 18.33% of the total population. The percentage of content experts, design experts and media experts is 85%, 85.33% and 84.29%, respectively, with an average feasibility rating of 84.87%. This indicates that the electronic pocket book medium is highly feasible for use.
Microplastic Analysis in the Digestive Tract of Squid (Loligo sp.) Sold at a Traditional Market in Palu City and Its Application as an Educational Medium Ni Kadek Apriyani; Fatmah Dhafir; Abd. Rauf; Achmad Ramadhan; Moh. Sabran; Masrianih
Bioscientist : Jurnal Ilmiah Biologi Vol. 14 No. 2 (2026): June
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.v14i2.20735

Abstract

This study aimed to identify the morphological types of microplastics present in the digestive tracts of squid (Loligo sp.) sold at a traditional market in Palu City. A descriptive approach combining quantitative and qualitative analyses was employed. A total of 10 fresh squid specimens were randomly selected from a single vendor at Lasowani Traditional Market. The digestive tracts were isolated, digested using 10% potassium hydroxide (KOH), and incubated at 40°C for 96 h. The recovered particles were subsequently classified and counted, and microplastic abundance was calculated. Three morphological types of microplastics—fibers, films, and fragments—were detected in the digestive tracts of the 10 squid specimens. A total of 948 particles were recorded, corresponding to a mean abundance of 94.8 particles per individual. Films were the most prevalent type, accounting for 48.4% of the total particles, followed by fragments at 26.7% and fibers at 24.9%. These findings indicate that film-type microplastics were dominant in the digestive tracts of the examined squid. Based on the research findings, an educational poster was also developed and subjected to expert validation. The poster achieved a feasibility score of 82.23%, indicating that it was highly suitable, based on the validation results, for use as a learning resource in biology education.
Co-Authors Achmad Ramadhan Berlinda Austin Paliwan Bustamin Fatmah Dhafir Hj. Musdalifah Nurdin Masrianih Ni Kadek Apriyani Raya Agni Safaat Safaat Syech Zainal