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All Journal Bioscientist : Jurnal Ilmiah Biologi
Purwatiningsih
University of Jember
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology Social Sciences

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Morphometric Description of Polistes tepidus from Ternate Island and Obi Island (Wallacea, Indonesia) Wahyu Agung Bintoro; Hari Nugroho; Purwatiningsih
Bioscientist : Jurnal Ilmiah Biologi Vol. 14 No. 1 (2026): March
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v14i1.19639

Abstract

This study aimed to descriptively compare the morphometric measurements of two Polistes tepidus specimens from Ternate Island and Obi Island preserved in the Museum Zoologicum Bogoriense. The research was conducted by measuring morphometric characters using a Leica Z6 APO microscope and L.A.S. 4.13 software. The observed characters included the head, thorax, wings, and metasoma, which were measured from three viewing angles: frontal, lateral, and dorsal. A total of 33 morphometric characters of the paper wasp were examined, and the mean measurements were analyzed using Microsoft Excel. The results showed that the morphometric measurements of P. tepidus from the two different locations, Ternate Island and Obi Island, exhibited size variation in several body characters. In general, P. tepidus individuals from Ternate Island had larger body sizes than those from Obi Island for most morphometric characters. Habitats with abundant food resources may allow individuals to develop larger body sizes. The morphometric differences between P. tepidus from Ternate and Obi Islands may also be explained by the effects of geographic isolation and the differing ecological conditions of the two islands. The islands of the Wallacea region are known for their high environmental heterogeneity, and insect populations therefore often exhibit morphological differences among regions. These findings highlight the need for broader sampling to further test geographic differentiation.
DHF Prevention Efforts in Sumbersari Jember: Assessment of Aedes aegypti Resistance Status to Deltamethrin Reni Puspitasari; Hidayatur Rohmah; Husnatun Nihayah; Purwatiningsih; Eva Tyas Utami; Susantin Fajariyah; Asmoro Lelono
Bioscientist : Jurnal Ilmiah Biologi Vol. 14 No. 1 (2026): March
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v14i1.19883

Abstract

This study aims to determine the resistance status of Ae. aegypti to the deltametrin insecticide in Sumbersari Jember Village. A total of 100 2nd generation female Ae. aegypti were tested using the CDC bottle bioassay with a deltamethrin dose of 10 μg/ml and a diagnostic time of 30 minutes. Molecular detection using AS-PCR was also performed to detect kdr mutations at position 1016 of the VGSC gene. Mortality data was calculated using Ms.Excel with a confidence level of 95%. The molecular wight of the PCR product is calculated using a gel analyzer application.  The results of the CDC bottle bioassay show that the Ae aegypti population is still tolerant to the insecticide deltamethrin (91,25% in mortality rate). However, molecular analysis confirms the presence of a mutation at position 1016 of the voltage-gated sodium channel (VGSC) gene (homozygous mutation), which is known to be the primary target of pyrethroid insecticides. These findings indicate that although phenotypic resistance has not yet fully developed, the mosquito population has shown early indications of target-site insensitivity to deltamethrin, which has the potential to develop into resistance under sustained selection pressure. Further use of deltamethrin insecticide may potentially increase phenotypic resistance, namely a decrease in mosquito mortality after exposure to deltamethrin insecticide. Therefore, an integrated vector control strategy and routine monitoring of mosquito resistance status in the region are required.
Co-Authors Asmoro Lelono Eva Tyas Utami Hari Nugroho Hidayatur Rohmah Husnatun Nihayah Reni Puspitasari Susantin Fajariyah Wahyu Agung Bintoro