Morphological plasticity of uceng fish (Nemacheilus spp.): A statistical exploration of water quality influences in East Java’s river

Authors

  • Dwi Anggorowati Rahayu Biology Study Programme, Universitas Negeri Surabaya, Surabaya, Indonesia
  • Endik Deni Nugroho Department of Biology Education, Universitas Nahdlatul Ulama Pasuruan, Pasuruan, Indonesia
  • Cahya Ajeng Valenta Tresna Sulung Biology Study Programme, Universitas Negeri Surabaya, Surabaya, Indonesia
  • Rusdianto Rusdianto Research Center for Biosystematics and Evolution, BRIN Cibinong, Bogor, Indonesia
  • Noorhidayah Binti Mamat Institute of Biological Sciences, University of Malaya, Kuala Lumpur, Malaysia

DOI:

https://doi.org/10.33503/ebio.v10i01.1383

Keywords:

Morphometics, native fish, plasticity, uceng, water quality

Abstract

Morphological plasticity in aquatic organisms is an adaptive phenomenon that enables species to respond to changing environmental conditions, particularly in native fish species such as the Uceng fish. This study aims to: (1) describe the morphological variation of the Uceng fish and water quality parameters in three river locations in East Java; (2) analyze the relationship between water quality parameters and the morphological characteristics of the Uceng fish; (3) identify the water quality parameters that most affect morphological variation of fish through PCA analysis; and (4) model the relationship between water quality parameters as independent variables and fish morphological characteristics as dependent variables. This research employed a correlational approach with a cross-sectional comparative design, comparing fish samples from three different geographic locations: Blitar, Pasuruan, and Lumajang. Data analysis was conducted using correlation analysis, PCA, and multiple regression modeling. Measurement of the Morphological Characteristics of the Uceng Fish, Morphometric Measurement (14 characters). The results showed a significant negative correlation (r = -0.155, p = 0.017) between environmental factors and fish morphology, with approximately 33% of the morphological variation explained by the combination of environmental factors (DO, temperature, COD, and TDS). PCA analysis identified DO as the parameter with the strongest positive influence, while temperature, COD, and TDS showed negative effects. These findings emphasize the species’ adaptive capacity and underline the importance of monitoring environmental quality to support biodiversity conservation in increasingly impacted river ecosystems of East Java.

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2025-07-24

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Rahayu, D.A. et al. 2025. Morphological plasticity of uceng fish (Nemacheilus spp.): A statistical exploration of water quality influences in East Java’s river. Edubiotik : Jurnal Pendidikan, Biologi dan Terapan. 10, 01 (Jul. 2025), 332–348. DOI:https://doi.org/10.33503/ebio.v10i01.1383.

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