http://repository.unmul.ac.id/handle/123456789/16 2026-06-26T12:08:26Z http://repository.unmul.ac.id/handle/123456789/59727 Fish community diversity and conservation status in coral reef and seagrass ecosystems of Teluk Singkama coastal village, East Kalimantan, Indonesia Jusmaldi, Jusmaldi The coastal waters of Teluk Singkama village, Sangatta Selatan District, East Kalimantan, encompassing seagrass meadows at Pantai Pasir Putih and coral reefs at Teluk Kaba, represent ecologically significant habitats that sustain diverse fish assemblages and support local livelihoods. The objective of this study was to analyze fish diversity and conservation status in these two ecosystems, thereby providing baseline information for sustainable management. Fish sampling was conducted in February 2025 using a traditional stationary fishing gear known as a set net (“sero”), with purposive sampling locations selected based on ecological considerations and expected migration routes of fish, and standardized collections performed every two days. A total of 176 individuals from 37 species, 20 families, and 5 orders were recorded in coral reefs, while 299 individuals from 23 species, 19 families, and 8 orders were documented in seagrass beds. Shannon-Wiener diversity indices revealed moderate diversity in both ecosystems, with coral reefs exhibiting higher diversity (H’ = 2.95) compared to seagrass beds (H’ = 2.44). Sørensen similarity analysis indicated 51.17% overlap between habitats, reflecting ecological connectivity while maintaining distinct assemblage structures. Conservation assessment based on the IUCN Red List categorized 40 species as Least Concern (LC), two species as Data Deficient (DD), and eight species as unlisted, suggesting relatively low immediate extinction risks but highlighting gaps in conservation knowledge. Ecologically, the findings emphasize the complementary roles of seagrass and coral reef ecosystems, with seagrass supporting higher abundance and coral reefs sustaining greater taxonomic richness, underscoring the necessity of conserving both habitats as interconnected units. Socio-economically, the exploitation of 23 species for local consumption and trade demonstrates strong community reliance on coastal biodiversity, necessitating continuous monitoring and adaptive management. Importantly, these results provide a critical baseline for sustainable coastal resource management in East Kalimantan, ensuring that biodiversity conservation and community livelihoods can be balanced in long-term planning. - 2026-06-20T00:00:00Z http://repository.unmul.ac.id/handle/123456789/58933 Truss morphometric and meristic analysis of Nile tilapia (Oreochromis niloticus) strains from cultivation ponds in Samarinda City, Indonesia Jusmaldi, Jusmaldi; Satri; Nova, Hariani Abstract. Currently, many strains or varieties of Nile tilapia (Oreochromis niloticus Linnaeus, 1758) are kept by fish cultivators in Indonesia, such as red tilapia, white tilapia, black tilapia, and various hybrid crosses. These strains have been selectively bred or naturally occurring variants that exhibit different colors, patterns, growth rates, and other desirable traits. The large diversity of phenotypes in the form of strains in Nile tilapia opens opportunities to be utilized in breeding and aquaculture programs. However, the utilization of phenotypic diversity for breeding and cultivation purposes requires an introduction to the characteristics of these strains. The purpose of the study was to determine the morphological diversity between the varieties of Nile tilapia, including black tilapia, white tilapia, red tilapia, stocky tilapia, and larasati tilapia, from the collection and to estimate their relationships based on the level of diversity and similarity between populations. Morphological characterization was carried out using truss morphometric and meristic methods. Truss morphometric data were applied to principal component analysis (PCA), while meristic character data were analyzed descriptively by reviewing the literature. Kinship of five strains was tested by cluster analysis. The results of this study show that the character that strongly contributes to the differences in morphological shape in black and stocky tilapia are characters B1 (the distance from the front of the base of the ventral fin to front of the anal fin) and characters B3 (the distance from the front end of the base of dorsal fin rays to the front of the anal fin base), while the body shapes of red tilapia, white tilapia, and larasati tilapia tend to be more similar. Based on cluster analysis, it reveals that larasati tilapia, red tilapia, and white tilapia cluster into a single group, whereas stocky tilapia and black tilapia tend to form a distinct group. There are no significant differences between red tilapia, white tilapia, larasati tilapia, stocky tilapia, and black tilapia based on meristic characters. 2025-05-31T00:00:00Z http://repository.unmul.ac.id/handle/123456789/58815 Dokumen Korespondensi TJNPR Marliana, Eva 2025-09-07T00:00:00Z http://repository.unmul.ac.id/handle/123456789/58691 Dokumen Hibah Penelitian 2016-2017 Eva Marliana Marliana, Eva 2016-03-16T00:00:00Z