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All Journal HAYATI Journal of Biosciences Prosiding Seminar Biologi Biocelebes ZOO INDONESIA Journal of Tropical Ethnobiology Zoo Indonesia
Anang Setiawan Achmadi
Museum Zoologicum Bogoriense, Pusat Penelitian Biologi LIPI Gedung Widyasatwaloka, Jl. Jakarta-Bogor Km. 46, Cibinong 16911, Jawa Barat
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Other

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Journal : zoo indonesia

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QUANTIFYING PELAGE COLORATION OF SOUTHEAST ASIA SPINY RATS GENUS Maxomys (MURIDAE: RODENTIA) USING SPECTROPHOTOMETRIC MEASUREMENTS Anang Setiawan Achmadi; Hitoshi Suzuki
ZOO INDONESIA Vol 27, No 2 (2018): Desember 2018
Publisher : Masyarakat Zoologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52508/zi.v27i2.4045

Abstract

We documented preliminary study of coat color variations within Maxomys, one of the most common rats in the Southeast Asian region. We sampled the skin specimens that mostly deposited at Museum Zoologicum Bogoriense, Indonesia. Quantitative measurements of coat color using spectrophotometer revealed no significant difference in the dorsal pelage showing mostly dark brown (L*= 25-30, a*= 5-7, b*= 10-15). The ventral colorations were variable among the species. We classified five different color types based on the measurements: whitish grey (M. baeodon, M. whiteheadi, M. musschenbroekii, M. bartelsii, and M. dollmani), orange dark brown (M. hylomyoides), chestnut orange (M. ochraceiventer), yellowish brown (M. alticola) and creamy white (M. rajah, M. hellwaldii, and M. surifer). These fur color characteristics can be useful in species recognition, together with the craniometric features. Furthermore, molecular study of coat color variation within Maxomys spp. is needed to elucidate the mechanisms of phenotypic variation in morphology that affect the patterns of divergence, speciation and evolutionary history of Maxomys. Here, we failed to obtain the sequences from Maxomys using Mc1r (melanocortin-1 receptor) gene, and probably will be better to use other gene such as ASIP (agouti signaling peptide) gene.
COMPARISON BETWEEN Trachypithecus auratus AND Trachypithecus cristatus BRAIN SIZE IN INDONESIA Endah Dwijayanti; Anang Setiawan Achmadi; Maharadatunkamsi Maharadatunkamsi; Nanang Supriatna
ZOO INDONESIA Vol 29, No 1 (2020): Juli 2020
Publisher : Masyarakat Zoologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52508/zi.v29i1.3977

Abstract

Taxonomic studies on Trachypithecus species in Indonesia define that this genus separated into two species that are Trachypithecus auratus and Trachypithecus cristatus with Trachypithecus auratus auratus as a subspecies. To determine relative brain size differences between species of the genus Trachypithecus in Indonesia and to examine clinal variation, a study related to brain size and morphological characters that affect the brain size is carried out. This study analyzes the brain volume between both species and examines its relationship with morphometric measurement and variables such as sex, age, and specimen location. Brain volumes were calculated from braincase volumes using 0.5 mm silica gel as mini beads. This study reveals that there are significant differences in relative brain size inter-species, sex, age and interaction among variable. Overall, T. auratus have a bigger brain size than T. cristatus, and the brain size of males are larger than females. The older individual tends to have similar brain size with younger ones. The different relative brain size on age level influenced by GSL size. Allometric body size affects the size of the brain directly. Also, there is a clinal trend in relative brain size. Trachypithecus auratus brain size is increasing from West Java to Lombok island. Further study is needed to understand the influence of external factor such as ecological and social factors on brain size in Trachypithecus.
Co-Authors Annawaty Annawaty, Annawaty Bambang Suryobroto Dwijayanti, Endah Endah Dwijayanti Esti Munawaroh Hari Nugroho Hitoshi Suzuki Jacob A. Esselstyn Jacob A. Esselstyn, Jacob A. KANTHI ARUM WIDAYATI Kevin C. Rowe Kevin C. Rowe, Kevin C. Maharadatunkamsi Maharadatunkamsi Nanang Supriatna Risdayanti Adi Purba St. Aisyah Sijid Y. Purwanto Zulkurnia Irsaf