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All Journal Jurnal Biologi Universitas Andalas JURNAL BIOLOGI PAPUA
Trijoko Trijoko
Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Materials Science & Nanotechnology

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Species Diversity of Earthworm in the Field of Biology Gadjah Mada University Sita Ratnawati; Niken Satuti Nur Handayani; Trijoko Trijoko
Jurnal Biologi Universitas Andalas Vol 7, No 2 (2019)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbioua.7.2.126-135.2019

Abstract

The Earthworms are one of the invertebrate species which hasn’t backbone. The Earthworm has lived in a few habitats, for example in the humid of forest ground with the high density of cover canopy. Field of Biology UGM is an artificial forest and has a high density of cover canopy  and this condition can supported the living habitat of earthworms. The aim of this research were investigated species diversity of earthworm in the field of Biology UGM.. Sampling method was carried out with purposive random sampling method. Result obtained that the earthworms in the field Biology of UGM consist of three species. The Three species were Pheretima hawayana, Pheretima sp., and Eudrilus eugeniae. Data analysis was used UPGMA method by 3.1 MVSP Program and obtained that generally, similarity percentage of P. hawayana, Pheretima sp., dan E. eugeniae interspecies more than 55 %. Whereas similarity percentage of P. hawayana and  Pheretima sp. more than 85 %.
Morfologi dan Geometri Morfometri Holthuisana sp. (Crustacea, Decapoda, Gecarcinucidae) dari Danau Sentani, Papua Rury Eprilurahman; Burhan Amirudien; Trijoko Trijoko
Jurnal Biologi Papua Vol 14, No 2 (2022)
Publisher : Jurusan Biologi FMIPA Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (883.586 KB) | DOI: 10.31957/jbp.1722

Abstract

Holthuisana is a freshwater crab member of the family Gecarcinucidae which has a distribution in eastern Indonesia to Australia. This study was aimed to determine the variations in the shape of carapace and chelae within genus Holthuisana collected from Sentani Lake, Papua using analysis of geometric morphometric. The morphological characters confirmed the specimen examined belong to genus Holthuisana. The results showed that male crabs had slightly larger carapace length and width than females. The length and width of the large chelae in male crabs are greater than that of females. The ratio of carapace length and width to male is 6:5, and female is 5:4. The ratio of the length and width of the chelae (propodus) in male crabs is 9:5, and in females 2:1. Based on the 16 landmarks of carapace, there are no significant different between male and female crabs. Thus, based on 12 landmarks of chelae, the large right cheliped shows different variations between males and females. The large right cheliped of the males shows more convex on polex and propodus compare to the females. The large left cheliped shows variations that are not much different.Key words: freshwater crab; geometric morphometrics; morphological characters; New Guinea
Co-Authors Burhan Amirudien Niken Satuti Nur Handayani Ratnawati, Sita Rury Eprilurahman