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Dwi Anggorowati Rahayu
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Jurnal Riset Biologi dan Aplikasinya
Published by Universitas Negeri Surabaya
ISSN : -     EISSN : 26559927     DOI : 10.26740/jrba
Core Subject : Health, Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology Medicine & Pharmacology
Jurnal Riset Biologi dan Aplikasinya is a peer-reviewed journal that strives to provide scientific information on the research results which focused on biological science (Ecology, Animal and Botanical Systematics, Microbiology, Zoology, Botany, Biotechnology, and Genetics and Evolution) and biological education (Innovation of Biology Learning, Assessment and Evaluation in Biology, and Media of Biology)
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ecology, Evolution, Behavior and Systematics
Articles 2 Documents
 1 
Search results for , issue "vol. 8 no. 1 (2026)" : 2 Documents clear
Morphological Distinction and Phenotypic Variance of Mystus (Mystus gulio, M. nigriceps, and M. singaringan) from Java Island, Indonesia: Morphological analysis of three Javanese Mystus (Mystus gulio, M. nigriceps, and M. singaringan) Ni Putu Anggun Larasati; Elok Amalia; Bintang Rhafsyanjani; Muhammad Dailami; Abd Rahem Faqih; Ating Yuniarti; Wahyu Endra Kusuma
Jurnal Riset Biologi dan Aplikasinya Vol. 8 No. 1 (2026)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrba.v8n1.p1-17

Abstract

Genus Mystus is widely distributed across Indonesia with eleven currently valid species. Three species are confirmed to inhabit Java Island: Mystus gulio, M. nigriceps, and M. singaringan. Due to their similar morphological appearances and relatively subtle diagnostic features, species identification and discrimination between these three species is somewhat challenging. This study evaluates the morphological differentiation of M. gulio, M. nigriceps, and M. singaringan at both interspecific and intraspecific levels using samples collected across Java Island. Morphological data including thirty morphometric and five meristic characters from 143 individuals in sampling sites were analyzed using Principal Component Analysis (PCA) and UPGMA clustering. PCA (75.32% total variance) effectively discriminated the three species, identifying maxillary barbel length and adipose-fin base length as the primary diagnostic characters. Intraspecific analyses revealed high morphological homogeneity across geographic sampling sites; however, significant phenotypic variance was observed, primarily attributed to ontogenetic allometric growth in juveniles and localized environmental plasticity. Despite testing for novel morphometric and meristic markers, this study reinforces the reliability of traditional adipose and barbel proportions as the definitive tools for field identification. These results provide a critical morphological baseline essential for the conservation, germplasm verification, and potential domestication of these indigenous aquatic resources. Highlighted Finding 1. Maxillary barbels and adipose fins are key diagnostic traits for Javanese Mystus2. PCA results reveal a unique morphological divergence in the Bogor M. singaringan3. Findings prioritize M. singaringan for farming and M. nigriceps for conservation Graphical View
Freshwater Snails Diversity and Distribution in the Kaduara Sulfurous Spring, Sumenep, Madura, Indonesia Fara Salsa Refalina Sidarta; Reni Ambarwati; Nur Rohmatin Isnaningsih
Jurnal Riset Biologi dan Aplikasinya Vol. 8 No. 1 (2026)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jrba.v8n1.p18-33

Abstract

Sulfurous spring habitats represent chemically extreme aquatic environments that typically support limited freshwater biodiversity; however, the gastropod fauna of such habitats in tropical Indonesia remains largely undocumented. This study aimed to document the diversity, morphology, morphometry, and physicochemical associations of freshwater gastropods inhabiting the Kaduara Sulfurous Spring, Sumenep, Madura Island, Indonesia. Specimens were collected on 17 July 2024 using the hand-picking method at one sampling point (coordinates: -7.1237°S, 113.6062°E), preserved in 70% alcohol. Physicochemical parameters were measured in situ, and sulfur content was determined gravimetrically following SNI 02-1760-2005. A total of seven freshwater gastropod species from two families were recorded: Stenomelania rustica, Stenomelania torulosa, Stenomelania sp., Mieniplotia scabra, and Melanoides tuberculata (Thiaridae), along with Neritina cornuta and Clithon sp. (Neritidae). The spring exhibited a water temperature of 29°C, pH of 7, and total sulfur content of 0.077% (770 mg/L). Shell dimensions of all recorded species were consistent with published reference ranges, indicating normal growth under the prevailing conditions. This study provides the first systematic record of freshwater gastropod diversity in a sulfurous spring ecosystem in Sumenep, Madura, establishing a critical baseline for future biodiversity monitoring in chemically stressed spring habitats.

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