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All Journal JBIO: jurnal biosains (the journal of biosciences) Jurnal Sains dan Teknologi Bioedukasi: Jurnal Pendidikan Biologi Jurnal Obsesi: Jurnal Pendidikan Anak Usia Dini Jurnal Ilmiah Pendidikan Fisika ABDIMAS SILIWANGI Jurnal Basicedu International Journal of Natural Science and Engineering Edumaspul: Jurnal Pendidikan Jurnal Pendidikan dan Konseling JURNAL ILMIAH KOHESI Jurnal Abdidas Mattawang: Jurnal Pengabdian Masyarakat Jurnal Pendidikan Sains dan Komputer Jurnal Ilmiah Multidisiplin (JUKIM) Jurnal Pendidikan dan Ilmu Sosial Abdi Jurnal Publikasi JURNAL MUARA PENDIDIKAN JIPI (Jurnal IPA dan Pembelajaran IPA) Tut Wuri Handayani : Jurnal Keguruan dan Ilmu Pendidikan JURDIAN
Siagian, Gunaria
Universitas HKBP Nommensen Pematangsiantar
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Journal : JBIO: jurnal biosains (the journal of biosciences)

 1 
STRUKTUR POPULASI IKAN GULAMAH (Johnius trachycephalus P.) DI SUNGAI BARUMUN KABUPATEN LABUHAN BATU SUMATERA UTARA Gunaria Siagian; Hesti Wahyuningsih; Ternala A Barus
JBIO: jurnal biosains (the journal of biosciences) Vol 3, No 2 (2017): Jurnal Biosains
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jbio.v3i2.7433

Abstract

Ikan Gulamah (Johnius trachycephalus) merupakan salah satu jenis ikan demersal yang banyak ditangkap oleh nelayan dengan menggunakan trammel net dan gill net, payang dan pukat. Penangkapan  ikan Gulamah di sungai Barumun Kabupaten Labuhan Batu dilakukan setiap hari tanpa batas. Eksploitasi yang tidak terkendalikan dapat mengakibatkan menipisnya stok ikan. Penelitian ini bertujuan untuk mengetahui kepadatan populasi, rasio kelamin, pola pertumbuhan ikan dan hubungan faktor fisik- kimia air dengan kepadatan ikan gulamah (Johnius trachycephalus) di sungai Barumun Kabupaten Labuhan Batu. Pengambilan sampel menggunakan metode purposive sampling pada 5 stasiun penelitian. Pengambilan sampel ikan dilakukan dengan memasang jaring sebanyak 5 ulangan pada masing-masing stasiun dan pada setiap ulangan jaring dibiarkan 1 jam di dalam air. Hasil penelitian menunjukkan bahwa kepadatan ikan Gulamah tertinggi di stasiun I yaitu 0,019 ind/m2 (37 ekor), terendah di stasiun V yaitu 0,003 ind/m2 (6 ekor). Rasio kelamin tertinggi di stasiun IV yaitu 1:8 dan terendah di stasiun I yaitu 1:1,5. Pola pertumbuhan ikan gulamah di stasiun I allometrik positif sedangkan di stasiun II-V allometrik negatif. Ikan gulamah yang didapatkan selama penelitian sebanyak 68 individu. Ikan jantan panjangnya berkisar 10,5 cm - 21,5 cm, ikan betina panjangnya 10,5 cm – 21,6 cm. Frekuensi panjang yang terbanyak (modus) 18,5 cm – 20 cm. Suhu dan kejenuhan oksigen berkolerasi sangat kuat terhadap kepadatan ikan gulamah (Johnius trachycephalus). Kata kunci : ikan Gulamah, struktur populasi, sungai Barumun 
DIVERSITY OF LAND ARTHROPODA ON PEOPLE’S PLANTATIONS AT JAWATONGAH VILLAGE, HATONDUHAN SUB-DISTRICT IN SIMALUNGUN NORTH SUMATERA Gunaria Siagian
JBIO: jurnal biosains (the journal of biosciences) Vol 6, No 3 (2020): Jurnal Biosains
Publisher : Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/jbio.v6i3.19539

Abstract

This study aims to determine the diversity, abundance, dominance index, similarity index and inequality of land arthropods in the people's plantations in the village of Jawatongah, Hatonduhan Subdistrict, Simalungun Regency. This research was conducted in October 2019 until November 2019. Sampling was carried out at 5 stations in the People's plantation in Jawatongah Village, Hatonduhan District, Simalungun Regency. Data retrieval is done 3 times using trap traps. From the results of research and data analysis found 9 orders and 1 family consisting of 9 orders and 16 families consisting of: Formicidae, Flatidae, Silphidae, Anobiidae, Labiduridae, Tephritidae, Culicidae, Rhagionidae, Simuliidae, Blephariceridae, Gryllidae, Anobiidae, Labiduridae, Tephritidae, Culicidae, Rhagionidae, Simuliidae, Blephariceridae, Gryllidae, Anobiidae, Labiduridae, Tephritidae, Culicidae, Rhagionidae, Simuliidae, Blephariceridae, Gryllidae, Acobiidae, Acrididae, Phrididae, Acrididae, Acrididae, Acrididae, Acrididae, Acrididae, Acrididae, Acrididae, Acrididae, Acrididae, Acrididae, Acrididae, Acrididae, Acrididae. Lachesillidae, Liposcelidae, Pholidae, Araneidae, Ageleidae. The highest relative abundance of soil Arthropods was Tephritidae (71, 486%), the lowest was Liposcelidae and Aranidae (0.367%). The diversity index of the Athropods of the soil ranged from 0.996-1.536. The dominance index ranged from 0, 27155 - 0.53598. From these observations it can be seen that in general the Tephritidae group dominates all places in the study location. For the Arthropod similarity index of land in the smallholder plantations of Jawatongah village, Hatonduhan sub-district, Simalungun Regency, ranged between 55.56% - 80%. Knowledge and knowledge about diversity, abundance, status and distribution of animals are very important for humans and need to be preserved to improve the welfare of society, especially in agriculture.
Co-Authors Abdul Razak Andromeda Andromeda Asrizai Asrizai debora exaudi sirait DELANTRI AGUSTINA GULTOM Dian Mars Ade Sitio Donna Cicilia Pangaribuan Endang Fatmawati Fatni Mufit Festiyed Gultom, Binsar Tison Gusar, Martua Reynhat Sitanggang Handoco, Ewin Hardeli Hardeli Hesti Wahyuningsih Irmayu Elfrida Siburian Lufri Lufri manik, ria retno Martua Ferry Siburian Mashudi Alamsyah Masni Veronika Situmorang Masni Veronika Situmorang Masni Veronika Situmorang MASNI VERONIKA SITUMORANG MASNI VERONIKA SITUMORANG MASNI VERONIKA SITUMORANG Maspenalta Sirait Melinia Sianturi Muktar Bahruddin Panjaitan Natalina Purba NIDO JAYA SAMUEL SILALAHI NORAWIDYA F.M. SIALLAGAN Pasaribu, Sunggul Ria Agustina Situmorang Santy Monica Purba Sianturi, Monalisa Frince Silaban, Winarto Silalahi, Mastiur Verawaty Simanjuntak, Hendra Situmorang, Masni Veronika Skunda Diliarosta Sunggul Pasaribu Tambunan, Janwar Tambunan, Lois Oinike Ternala A Barus Titis Wulandari Tomi Apra Santosa Tomi Apra Santosa Uslan Uslan Vani Lastiur Siahaan Yerimadesi Yerimadesi Zulyusri Zulyusri