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Melihat Hukum Fisika di Balik Gerakan Berenang Ikan di Air Pratiwi Restu Murti; Dadiono, Muh. Sulaiman
Academic Letters Vol 2 No 1 (2026)
Publisher : PT. Gyandharma Global Media

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.64781/669980

Abstract

Kemampuan ikan berenang dengan cepat dan efisien merupakan hasil dari penerapan alami hukum fisika, terutama yang berkaitan dengan gaya gerak, hambatan air, dan aliran fluida. Artikel ini bertujuan menjelaskan bagaimana hukum fisika memengaruhi kecepatan renang ikan dengan pendekatan sederhana yang mudah dipahami oleh pembaca umum. Pembahasan mencakup prinsip aksi reaksi, pengaruh hambatan air, bentuk tubuh ikan, serta pemanfaatan pusaran air. Hasil kajian literatur menunjukkan bahwa ikan tidak hanya mengandalkan kekuatan otot, tetapi juga memanfaatkan bentuk tubuh dan pola gerak untuk mengurangi hambatan dan menghemat energi. Pemahaman ini memberikan gambaran bahwa alam telah mengembangkan sistem gerak yang sangat efisien, yang kini banyak ditiru dalam teknologi modern.
Review of Calotes versicolor an invasive lizard species on the island of Java Pratiwi Restu Murti
Indo Journal of Multidisciplinary Science Vol 2 No 1 (2026): On Going
Publisher : PT. Gyandharma Global Media

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Calotes versicolor, or the oriental garden lizard, is a species of lizard native to South Asia and parts of mainland Southeast Asia. However, in recent decades, its distribution has expanded through human introductions to various archipelagic regions, including Indonesia. On the island of Java, C. versicolor is increasingly found in densely populated areas, agricultural areas, yards, and forest edges. This review article aims to examine the origins of C. versicolor in Java, potential introduction routes, factors for successful invasion, and its impact on local species and ecosystem structure. The method used is a desk study through a review of scientific literature from Google Scholar and online articles. The results of the study indicate that C. versicolor likely spread to Java through inter-island trade routes, agricultural transportation, and human movement routes from the colonial period to the modern era. This lizard's high habitat tolerance, effective reproduction, and opportunistic behavior make it a potential competitor to local lizards such as Bronchocela jubata, Eutropis multifasciata, and several native insect species. Ecological impacts include competition for space and food, predation on invertebrates and small vertebrates, and the potential spread of pathogens. This study emphasizes the importance of population monitoring and regional biosecurity policies to prevent the expansion of the impact of this invasive species in Java.