Jurnal Biologi UNAND
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Inventarisasi Jamur Tingkat Tinggi (Basidiomycetes) di Gunung Singgalang Sumatera Barat
Get PDFThe macrofungi of Basidiomycetes was collected in Singgalang mountain and then identified in Microbiology Laboratory, Department of Biology, Faculty of Sciences, Andalas University. The aim of this study was to identify the macrofungi from Basidiomycetes. This study used direct survey method to collect macrofungi from the field. This study identified 22 genera which belong to 10 family and 6 orders. Most of the fungi were belong to subclass of Hymenomycetidae.Keywords: basidiomycetes, inventories, macrofungi
Laju Pertumbuhan Belut Sawah (Monopterus albus Zuiew) dengan Pemberian Berbagai Pakan
Get PDFThis experiment aimed to determine growth rate of farm swamp eel under various food supply. The experiment used Completely Random Design (CRD) with four treatments and three replications. The treatments were various food supply i.e: earthworms, snails, floating pellets and sinking pellets. The results showed that various foods gave significant difference on the growth rate of the eel in term of absolute weight, daily growth, food conversionand food efficiency. There were nosignificant difference on absolute length and survival rate of the eel. The highest value of the absolute weight and daily growth during 60 days feeding was found at feeding earthworm. The highest value of food efficiency and food conversion was found at feeding sinking pellets. Keyword: swamp eel, physiology, growth, food
Komunitas Makrozoobentos di Sungai Batang Ombilin Sumatera Barat
Get PDFThe study about community of macrozoobenthos at Batang Ombilin River, West Sumatra has been done from November 2012 until March 2013. This study aimed to know the composition and structure of macrozoobenthic community. This research carried out by using survey method and purposive sampling technique. Sampling site determined in six stations. In each station were collected five samples by using Surber net (30x30 cm2). The result showed that community of macrozoobenthos were found 34 species consist of Insecta 20 species, Gastropoda 5 species, Olighocaeta 4 species, Hirudinea 2 species, Lamellibranchiata, Arachnida and Turbellaria one species respectively. The highest relative density was Gastropoda (46.27 %) and the lower was Arachnida (0.28 %).  Average population was 130.18 ind/m2, and the highest density has found at Station I (391.07 ind/m2), the lower at Station V (37.77 ind/m2). Dominant species in each station were variated. Average diversity index was 1.73, the highest was found at Station V (H’=2.22) and the lowest at Station III and IV (H’=1.19).The composition of macrozoobenthos among stations  were different, with low similarity index ranged from 14.28 % - 36.36 %.Key words : Batang Ombilin, Makrozoobenthos, Composition, Structure
Isolasi dan Karakterisasi Bakteri Amilotermofilik Dari Sumber Air Panas Sungai Medang
Get PDFThe research on isolation and characterization of amylothermophilic bacteria has been done in Research Laboratory of Microbiology, Biology Department, Mathematics and Natural Sciences Faculty, Andalas University, Padang. The aimed to obtain amylothermophilic isolate and describe their characteristic. The study used purposive sampling method and descriptive analysis. The study results obtained four amylothermophilic isolates with amylolitic index ranged from 2.23 until 3.51 were different macroscopic characters, rod shape, motile and produce catalase enzyme, three isolates were Gram positive and spore forming, one isolate was Gram negative
Jenis-Jenis Kumbang Tinja (Coleoptera: Scarabaeidae) di Hutan Pendidikan dan Penelitian Biologi (HPPB) Universitas Andalas, Padang
Get PDFA study about dung beetles species was conducted at the Educational and Biological Research Forest. Pitfall trap method was used to collect dung beetles which cow, cat and human feses were put above each of the trap. The beetles colection was conducted at four locations (river, permanent plot, camp and villa). A total of 10 species of dung beetles that belong to two subfamilies, three tribes and five genera was collected. About three species were not reported in previous studies in West Sumatra.Keywords: Coleoptera, Scarabaeidae, Pitfall trap, West Sumater
Induksi PLB Anggrek Vanda sumatrana Schltr. Liar Pada Media MS dengan Penambahan BAP dan NAA serta Ploidisasi dengan Kolkisin
Get PDFThe study about PLB induction of wild Vanda sumatrana Schltr. on MS media suplement with BAP and NAA and ploidisation by colchicine treatment was conducted from December 2014 until November 2015 at the Laboratory of Genetics and Cell Biology and Laboratory of Plant Physiology and Tissue Culture, Biology department, Faculty of Mathematic and Natural Science, Andalas University, Padang. The study aimed to 1) knowing the best concentration of 6-Benzyl amino purin (BAP) and α-Naphtalene acetic acid (NAA) for Protocorm Like Bodies (PLB)  induction from shoot tip of V. sumatrana, 2) knowing the PLB response of V. sumatrana to concentrations and soak period of colchicine and 3) find the effective concentrations and soak period of colchicine to induce tetraploid on PLB of V. sumatrana. Shoot tips from in-vitro cultured of V. sumatrana were subcultured on Murashinge and Skoog (MS) medium supplement with 3 mg/l BAP + 0,5 mg/l NAA, 3 mg/l BAP and 1,5 mg/l BAP. PLB of diploid V. sumatrana from the best treatment were soaked in 0.05% and 0.1% colchicine for 24 and 48 hours respectively in MS liquid medium, as control were set PLB without colchicine treatment. The results showed that MS medium supplemented with 1.5 mg/l BAP was the best formula to induce PLB. The highest percentage of survival rate of PLB and percentage of survived PLB regenerated shoot was obtained from 0.05% colchicine with 24 hours soak period treatment. The effective treatment to induce tetraploid on PLB of V. sumatrana Schltr. was obtained from 0.05% colchicine solution for 24 hours soak period
Deskripsi Gejala dan Tingkat Serangan Penyakit Bercak pada Batang Tanaman Buah Naga Merah (Hylocereus polyrhizus, L.) di Padang Pariaman, Sumatera Barat
Get PDFStudy of symptom and disease severity of stem spotting disease on red dragon fruit (Hylocereus polyrhizus, L.) was conducted from December 2012 to February 2013 in Padang Pariaman, West Sumatera. Laboratory and screen house work were carried out at Solok Tropical Fruit Research Institute and microbiology laboratory of Biology Department at Faculty of Mathematics and Natural Science, Andalas University, Padang. This study used direct observation method and the data was analyzed descriptively. Objectives of the research were to characterize and identify the causes of stem spotting disease symptom and then to measure disease incidence in production centers of dragon fruit in Padang Pariaman, West Sumatra. The result showed that percentage of stem spotting disease of dragon fruit was 99,5% while disease severity index of it was 2,2 (moderate severity). Disease symptoms were spotting/patches of brown to black round surrounded by yellow halo. The pathogen was identified as Colletotrichum gloeosporoides.
Keywords: Dragon fruit, stem spotting, identificatio
Jenis-Jenis Cacing Parasit Saluran Pencernaan pada Hamster Syria Mesocricetus auratus (Waterhause, 1839) di Kota Padang
Get PDFA study about gastrointestinal helminths of Mesocricetus auratus (Waterhause, 1839) in Padang, West Sumatera was conducted from March to July 2013. This study was aimed to identify species of gastrointestinal helminths and to determine the prevalence of gastrointestinal helminths of M. auratus in Padang. Sampling was conducted by using Purposive methods. Those samples were examined by using direct observation, floating-centrifuge and sedimentation method. A total of four helminths species that belonging to two phylums and four orders was collected. The obtained helminths were Hymenolepis nana Siebold, 1852 (Cyclophyllidea), Syphacia obvelata Rudolphi, 1802 (Ascaridida), Sp. 1 (Strongylida), and Sp. 2 (Enoplida). The prevalence of Syphacia obvelata, Hymenolepis nana, Sp. 1 and Sp. 2 were 57,1%, 50%, 17,1% and 17,1%, respectively
Studi Mikromorfologi Kapsul dan Spora serta Implikasinya terhadap Pengelompokkan Lumut Pogonatum P. Beauv. (Polytrichaceae)
Get PDFThe micromorphology capsule and spore are important characters for identification and clarification of problematic taxa in Bryophyta. The number of Pogonatum species in West Sumatra are still unclarified. The purpose of this study is to identify and to make a Pogonatum cluster based on micromorphology of capsule and spore characters. This study has been conducted from March to August 2013. Samples were directly collected in two exploration routes namely Cagar Alam Lembah Anai (Kandang Ampek - Mega Mendung route) and Singgalang Mountain (Pandai Sikek - Top Singgalang route). The micromorphology of capsule and spore of Pogonatum were observed using a Scanning Electron Microscope (SEM). The results showed that five species of Pogonatum (P. ciratum, P. microstomum, P. macrophyllum, P. Teysmannianum , and P. cf. urnigerum) were identified. The key characters of Pogonatum was nematodontous peristome teeth, monolete spore type, prolate spore shape with granulate and echinate ornamentation. Cluster analysis of 44 individuals indicated that Pogonatum tends to be in the same group. Based on micromorphological analysis, the results supported that Pogonatum was similar to Polytrichum.
Keywords: peristome teeth, Pogonatum, Polytrichum, SEM, spor
Kelimpahan Populasi dan Kondisi Habitat Labi-Labi (Dogania subplana: Reptilia: Trionychidae) di Kawasan Kampus Universitas Andalas Padang
Get PDFA study on population and habitat of forest softshelled turtle (Dogania subplana: Reptilia: Trionychidae) has been conducted from January to March 2014. This study aimed to understand population abundance and to describe non-natural and natural habitats. Population abundances were found out through searching, counting and release methods. Habitats were described based on physic-chemical, potential food-resource and vegetation factors. The turtles were more abundance in non-natural habitat (33 individual of 640 m²) than natural habitat (5 individual of 5.100 m²). The turtles were abundance in sand and gravel streams of non-natural habitat and sand and rocky streams of natural habitat. The turtles prefered in slow streams (0-10 cm/s) and neutral pH (7.1-7.6).Keywords: population abundance, non-natural habitat, natural habitat, Dogania subplana