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All Journal NIKe Jurnal Ilmiah Perikanan dan Kelautan | Fisheries and Marine Scientific Journal
Miftahul Khair Kadim
Program Studi Manajemen Sumber Daya Perairan, Fakultas Kelautan dan Teknologi Perikanan, Universitas Negeri Gorontalo
Agriculture, Biological Sciences & Forestry Environmental Science Social Sciences

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Indeks Ekologi Gastropoda di Kawasan Perairan Kecamatan Tilamuta Kabupaten Boalemo Faradila Putri Nasaru; Miftahul Khair Kadim; Sitty Ainsyah Habibie; Sandrianto Djunaidi
The NIKe Journal VOLUME 13 ISSUE 3 | SEPTEMBER 2025
Publisher : Fakultas Kelautan dan Teknologi Perikanan - Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/nj.v13i3.32466

Abstract

This study aimed to determine gastropod diversity and the current ecological conditions of the waters in Tilamuta District, Boalemo Regency. Sampling was conducted in April 2025, distributed across three stations. Samples were collected during low tide using a belt transect method covering an area of 150 m2. Identification results revealed a total of 2204 gastropod individuals, representing 12 families: Columbellidae, Cerithiidae, Conidae, Cypraeidae, Strombidae, Littorinidae, Turbinidae, Trochidae, Muricidae, Neritidae, Patellidae, and Vasidae, with a total of 21 species identified. The Shannon Diversity Index (H') indicated a low level of diversity (H' < 2) in the study area. Conversely, the dominance index for the study site ranged from 0.75 to 1.00, signifying a high level of dominance. Furthermore, evenness patterns, as indicated by the J' and Ep indices, all showed values below 1, suggesting an uneven distribution of gastropod species. The study results reveal that the aquatic environment of Tilamuta District, Boalemo Regency, shows signs of pollution, stemming from impaired environmental conditions in the waters, evidenced by low biodiversity.
Indeks Kemerataan dan Dominansi Gastropoda di Perairan Pesisir Pantai Moodulio Kabupaten Bone Bolango Provinsi Gorontalo Windi Deptianingsih Asama; Miftahul Khair Kadim; Sitti Nursinar; Sandrianto Djunaidi
The NIKe Journal VOLUME 13 ISSUE 3 | SEPTEMBER 2025
Publisher : Fakultas Kelautan dan Teknologi Perikanan - Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/nj.v13i3.32535

Abstract

Indonesia's marine biological diversity is exceptionally rich, encompassing all existing phyla. Among them, the class Gastropoda represents the largest group within the Phylum Mollusca. Organisms inhabiting hard substrates in intertidal zones exhibit remarkable adaptability to dynamic conditions. Gastropods, in particular, demonstrate a high capacity for adaptation, enabling their survival across various habitats. The level of gastropod species diversity in a given aquatic environment is influenced by several factors, including physical environmental conditions. This study investigates the impact of environmental parameters on the evenness and dominance of gastropods, as well as the effects of environmental changes on these community characteristics. Sampling was conducted at three stations along the coastal area of Bone Bolango Regency. An observational procedure employing a census method was used for sample collection, and purposive sampling determined the sampling points based on specific criteria. Gastropod specimens were collected using a hand-picking technique within a 150 m² transect area, observing the entire station's hard substrate. Water quality data were subsequently analyzed using a pollution index. A total of 422 gastropod individuals were recorded across all stations, representing eight families: Conidae, Cypraeidae, Muricidae, Turbinidae, Neritidae, Strombidae, Tegulidae, and Turbinellidae. Nineteen species were identified from the three research locations. The diversity indices calculated for the three locations are as follows: The Shannon-Wiener diversity index (H′) showed values less than four, indicating moderate diversity. The Simpson's dominance index (D) had values close to one, suggesting a high level of dominance. The Pielou's evenness index (J′) approached one, indicating high evenness within the gastropod community.
Co-Authors Faradila Putri Nasaru Sandrianto Djunaidi Sitti Nursinar Sitty Ainsyah Habibie Windi Deptianingsih Asama