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Kompleksitas Obyek dan Running-Wheel Mempengaruhi Novel Object Recognition Test pada Mencit (Mus musculus) HANIM, NISFA; WIDYASTUTI, SALMAH; ALFIYAN, ACHMAD; AKBAR, MUHAMMAD AZHARI; JULIANDI, BERRY
Jurnal Sumberdaya Hayati Vol. 4 No. 1 (2018)
Publisher : Departemen Biologi, Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsdh.4.1.7-11

Abstract

This research aimed to confirm the tendency of mice to novel object, effect of exercise (in running-wheel) toward memory of mice and to test tendency of mice in avoiding predator signal in novel object. Novel object recognition test (NORT) used to test the memory the day after acquisition phase (NORT I) and memory one week after exercise was given (running-wheel) (NORT II). The result showed that there was no tendency of mice in exploring toward novel object in both NORT I and NORT II. This might happen because the complexity of familiar object higher than novel object, so the familiar object could accommodate more activities. Exercise using running-wheel in mice had an effect on memory, it could be seen in decreasing duration of object exploration time from NORT I to NORT II. There was no tendency in avoiding predator’s signal on novel object which was attached by urine addition (odor signal).
THE IDENTIFICATION OF MICROPLASTICS IN GILLS AND DIGESTIVE TRACT IN TILAPIA FISH (Oreochromis mossambicus) IN LAKE TOBA Simbolon, Licia Larosa; Sudibyo, Mufti; Hanim, Nisfa
BIOLINK (Jurnal Biologi Lingkungan Industri Kesehatan) Vol. 11 No. 2 (2025): Biolink February
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/biolink.v11i2.13963

Abstract

Microplastics threaten the survival of aquatic organisms including fish in Lake Toba. This study aims to identify the type and abundance of microplastics found in the gills and digestive tract of tilapia (Orochromis mossambicus) in cages and non-cages of Lake Toba, Samosir Regency. Sampling was conducted in February-March 2024 at three stations namely Tanjung Bunga, Palipi, Simarsasar with sampling at each location of 10 caged and non-caged fish each. Extraction of microplastics using the Fenton. Observation parameters included gill weight, gut length, and abundance of microplastics in the gills and digestive tract. The results revealed that the majority of microplastics identified in cages and non-cages were fiber and filament types, with non-cage fish having a higher abundance of microplastics than cage fish.
DISTRIBUTION OF Charybdis (Archias) padangensis Leene & Buitendijk, 1952 (CRUSTACEA: DECAPODA: BRACHYURA) IN THE WATERS OF SUMATRA AND JAVA Hanim, Nisfa; Farajallah, Achmad; Widayat, Kanthi Arum i; Mashar, Ali
JURNAL BIOSAINS Vol. 10 No. 3 (2024): JBIO : JURNAL BIOSAINS (THE JOURNAL OF BIOSCIENCES)
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jbio.v10i3.61142

Abstract

Until this decade, Charybdis (Archias) padangensis was only from Padang, West Sumatra. It was reported first and the only one in 1952. We obtained several crab samples based on the by-catch from daily fishermen in several locations. Based on morphological identification, we obtained several Charybdis (Archias) padangensis individuals from two locations in Sumatra and one location in Java. The results of this research add to data on the distribution of the species, which was previously only known from the locality type.