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All Journal METAMORFOSA Journal of Biological Sciences Jurnal Biologi Udayana Bumi Lestari Ecotrophic, Journal of Environmental Science SIMBIOSIS
Joko Wiryatno
Jurusan Biologi F.MIPA Universitas Udayana, Bukit Jimbaran - Bali
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Energy Environmental Science Immunology & microbiology

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Pengaruh Pemberian Pakan Alami Kopepoda Jenis Acartia sp. Terhadap Pertumbuhan Nener Bandeng (Chanos chanos) Dionisius Darmawan Sutanto; Deny Suhernawan Yusup; Joko Wiryatno
Metamorfosa: Journal of Biological Sciences Vol 6 No 2 (2019)
Publisher : Prodi Magister Ilmu Biologi, Fakultas MIPA, Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/metamorfosa.2019.v06.i02.p15

Abstract

Copepods is a zooplankton which is common to be found in the seas and one of the primary food of fish larvae. Copepods believed to be one of the key of aquaculture development because it has higher nutritional value. One of the most researched copepods species is Acartia sp. because having shorter life cycle and the most easily found compared to other copepods species. However information about copepods growth still limited. The research of copepods species Acartia sp. growth was aimed to collect information about Acartia sp. body length and width so that it can known whether fish larvae mouth opening match with copepods body size. This research was done in March 2017 at Gondol Reseach Institute of Mariculture, Gondol, Bali. Acartia sp. sample was collected from mass culture pond’s outlet pipe as much as 250 mL with three repetitions so the total sample was 750 mL then around 1 mL was taken to be observed in the microscope dissecting set which equipped with micrometer at 64 times magnification for measurement process. Variable to be observed was Acartia sp. body length and width. From the research it was known Acartia sp. has four phase of life cycle which is egg, nauplii, copepodit, and adult. Acartia sp. eggs have a measurement around 0,04 mm to 0,05 mm, then nauplii sized around 0,069 mm to 0,182 mm, while copepodit sized around 0,363 mm to 0,584 mm, and the adults sized around 0,865 mm. Acartia sp. has a rapid population growth because one adult Acartia sp. can produce 16 eggs.
PERTUMBUHAN, HISTOPATOLOGI OVARIUM DAN FEKUNDITAS IKAN NILA MERAH (OREOCHROMIS NILOTICUS) SETELAH PAPARAN PESTISIDA ORGANOFOSFAT IRIANI SETYAWATI; NGURAH INTAN WIRATMINI; JOKO WIRYATNO
Jurnal Biologi Udayana Vol 15 No 2 (2011): Jurnal Biologi
Publisher : Program Studi Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana

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Abstract

Fish cultures in rice fields or areas that use water from a pesticide-polluted irrigation or river, are particularly vulnerable to the negative impact of pesticides. This study aims to assess the effect of organophosphates on growth, ovarian histopathology and fecundity of red tilapia (Oreochromis niloticus). After acclimatization, 160 fishes (fingerlink stage) were kept in four ponds sized 2x1,5x0,8 m each. This study used a complete randomized block design and organophosphate administration through the feed. The study used four groups: control, and variations in dose of 2 ml (D1), 6 ml (D2), and 10 ml (D3) of pesticide per 100 grams of pellet, which is given in the morning (treatment) and in the evening (regular feed). Data were taken at week 3, 6, and 9, then the organophosphate treatments were stopped, and the last data were taken at week-18. Statistical analysis was performed by Anova and Duncan's Multiple Range Test. The results showed that the organophosphate pesticide inhibits the growth by reducing fish length and weight, reducing ovarian weight, increasing the number of oocyte atresia, damaging structure of the ovarian histology, and decreasing fecundity by reducing the number of egg production in the ovarian of red tilapia.
SEBARAN BULU BABI (ECHINOIDEA) DI KAWASAN PADANG LAMUN PANTAI MERTA SEGARA, SANUR-BALI Timothy Herman Laning; Deny Suhernawan Yusup; Joko Wiryatno
Jurnal Biologi Udayana Vol 18 No 2 (2014): JURNAL BIOLOGI
Publisher : Program Studi Biologi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Udayana

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Abstract

Tujuan penelitian adalah untuk melihat sebaran hewan bulu babi di kawasan padang lamun Pantai Merta Segara, Sanur. Penelitian ini telah dilakukan sebanyak tiga kali ulangan pada saat keadaan surut dari bulanOktober 2012 sampai Februari 2013 di Pantai Merta Segara, Sanur. Penelitian ini menggunakan 4 transek sejajar garis pantai dengan panjang 50 meter, dengan 15 kuadrat berukuran 10x2,5m pada masing-masing transek. Jarak antar transek adalah interval 20 meter. Hasil pengamatan diperoleh 9 spesies (5 famili), yaitu Diadema savignyi, Diadema setosum, Diadema palmeri, Echinothrix calamaris, Echinometra mathei, Echinocardium sp., Mespilia globulus, Tripneustues gratilla dan   Toxopneustes sp.Indeks keragaman yang sedang (H’= 2,43) menunjukanpola penyebaran yang merata (E = 0,76) dan tingkat dominansi yang rendah (D = 0,25). Aktifitas penambatan kapal dan aktivitas wisatawan diduga berdampak netatif terhadap keberadaan lamun yang secara tidak langsung mengancam keberadaan bulu babi. Selain itu, ditemukan adanya keterkaitan antara jumlah spesies bulu babi dengan tipe substrat pasir halus sebagai habitatnya.
MAKROZOOBENTHOS PANTAI PERERENAN (KABUPATEN BADUNG): JENIS, STATUS, DAN MANFAATNYA BAGI MASYARAKAT Ngurah Intan Wiratmini; Joko Wiryatno; A.A.G. Raka Dalem
Bumi Lestari Journal of Environment Vol 8 No 2 (2008)
Publisher : Environmental Research Center (PPLH) of Udayana University

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Abstract

The research was undertaken on Pererenan beach in the Regency of Badung, Bali Province, between September and December, 2006. The study sites occur close to the downstream of Bausan creek, the location of which were part of ”Subak Kedungu” irrigation system (east of the creek) and ”Subak Munggu Tegal Lantang” irrigation system (west of the creek). Samples were taken on low tides periods of the intertidal zones of the beach. Samples were stratified randomly taken on three kinds of substrates: on sand and coral substrates on the west, sand substrates in the middle and hard sandstone on the east, each of which consist of five quadrates of 40 cm x 40 cm. Results of this research showed that on the site have been successfully identified 17 species of macrozoobenthic fauna. None of them were classified as protected species. The macrozoobenthic fauna on Parerenan beach had a medium level of index of diversity (IK = 2,598). This meant that, the beach ecosystem in Pererenan was in a stable condition with a medium level of diversity. From the benefit and problems related to their occurrence, it can be described that macrozoobenthic organisms on this study sites, some can be consumed. Besides, there were also some species which dangerous to human because they can cause bleeding, or dangerous hurt caused by sharp needles.
JENIS TUMBUHAN DAN KONDISI HUTAN MANGROVE DI NUSA LEMBONGAN DAN NUSA CENINGAN, KECAMATAN NUSA PENIDA, KABUPATEN KLUNGKUNG I G. A. Sugi Wahyuni; N. M. Susun Parwanayoni; Joko Wiryatno
Bumi Lestari Journal of Environment Vol 7 No 2
Publisher : Environmental Research Center (PPLH) of Udayana University

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Abstract

This research was undertaken in Nusa Lembongan and Nusa Ceningan, District ofNusa Penida, Klungkung Regency, between 2005-2006. This reserach was aimed to find outthe size of area and the status of mangrove forest, kind of species, as well as problems facedby the forest related to its conservation status. From this research it was revealed that thesize of the area where the mangrove available in Nusa Lembongan was around 212 ha, andthere was also mangrove forest in Nusa Ceningan about 15 ha. There were 13 species offlora available on mangrove ecosystem which were classified as true mangroves, while 9kinds were asociated mangroves. From the field observation it was revealed that there is apossible threat to the mangrove forest if there is no good management strategy. Someactivities which were available on the mangrove forest that were potentially provided impactsto sustainability of the forest, such as the use for anchoring boats and mangrove touractivities.
KAJIAN DEGRADASI LAHAN MANGROVE DI PESISIR DESA LABUHAN SANGORO KECAMATAN MARONGE KABUPATEN SUMBAWA Lalu Samsul Rizal; I.P.G Ardhana; Joko Wiryatno
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 8 No 1 (2014)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

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Abstract

The aims of the research was to determine the perceptions of stakeholders (Community, Government and Employers), to know the potential of mangrove species and determine the impact of mangrove degradation on fish and non-fish biota, at Labuhan Sangoro coastal village. This study was conducted for three months from April to June 2012. Data were analyzed descriptively using a Likert scale for the perception of stakeholders. Potential mangrove species was examined using transects and to determine the impact of mangrove degradation on species diversity of aquatic fauna associated with mangrove were obtained by observation of nonparticipant method. The results showed that perceptions of stakeholders towards preservation and conservation of mangrove land, the 87% strongly agreed, 66% agreed and 22% disagreed, government and employers 86% strongly agree, 78% agree and disagree 3%, but not yet to the application phase. The potential of mangrove type in the coastal village of Labuan Sangoro at Station 1, 2, 3, and 4 by R. mucronata and R. stylosa, Transect I dominated by Rhizophora mucronata, R. stylosa, R. apiculata, Sonneratia alba, Lumnitzera racemosa and Ceriops tagal, transect II by Avicennia marina, R. mucronata and R. stylosa, Transect III by A. marina and R. mucronata and transect IV by R. mucronata and R. stylosa. Fish eatch on the condition of low and high degradation condition, the dominant fish species caught is Beronang (Siganus sp), non-fish species dominated by Crab (Scylla serrata). The number of catches in the low mangrove land degradation conditions wais 2,609 species of fish and non-fish tail 4678, on the high mangrove degradation conditions, the fish catch was 1,090 and non-fish was 1,114. The diversity, uniformity and the dominance of species, classified in the category of low and moderate levels.
PENILAIAN EFEKTIFITAS PENGELOLAAN TAMAN WISATA ALAM LAUT (TWAL) TELUK KUPANG NUSA TENGGARA TIMUR ROLINDA INNEKE FOENAY; N.K Mardani; Joko Wiryatno
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 6 No 2 (2011)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

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Abstract

Damage to coral reef ecosystems in the Bay of Kupang reaching 30.6%. Activities to restore coral reefs are also conducted through coral transplantation programs. Although this activity was relatively successful, but the power of coral reefs to recover relatively longer, while coral mining and destructive fishing in the areas within the region is still on going. The purpose of this research is (1) to investigate the effectiveness and efficiency of management 1WAL Kupang Bay. (2) To investigate condition of coral reefs live in Kupang Bay after the management and (3) to investigate condition of socioeconomic the communities around Kupang Bay after the management. The method of research used observation and direct observation in the field, with socioeconomic data retrieval techniques using quesioner and coral reef data using Line Intercept 'Jransect (LI11 method and discovery of documents which contain about the development of coral cover. The results showed that the communities around Kupang Bay 1WA L not know and was not involved in the preparation of management plan 1WA L Kupang Bay. Data on coral reefs show that damage continues to occur with a marked decline in coral cover prosesntase. Following up on these circumstances will require collaborative management mechanism that involves the community as one of the stakeholders in the area of the bay 1WAL Kupang.
KAJIAN KERUSAKAN DAN STRATEGI PENGELOLAAN TERUMBU KARANG DI KAWASAN KONSERVASI LAUT DAERAH (KKLD) GILI SULAT DAN GILI LAWANG LOMBOK TIMUR NUSA TENGGARA BARAT Ahmad Subhan; I.P.G Ardhana; Joko Wiryatno
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 8 No 1 (2014)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

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Abstract

Coral reef and its life within is a high value natural resources. Management of KKLD GiliSulat-GiliLawas has been going for 8 years, however the management was still not maximal, in particular on preservation of coral reef ecosystem in the conservation area, and community commitment in managing and conserving fish resources and other biota. Therefore, to improve management planning, study need to be done with the aim to find out destruction level of coral reef at KKLD GiliSulat – GiliLawang, based on coverage percentage, fishermen, private sector and government perception. Also to identify policy related with coral reef management in this area, then to formulate its management strategies. Results of the survey shows that in general, average condition of the coral reef in this area is fair (lifeform= 49,26%). Recommended management strategies in KKLD GiliSulat-GiliLawang include SO strategies (Strength - Opportunity) which are coral reef management should be based on ecotourism, increasing community involvement in managing the coral reed and improve institutional strength of KPPL, and maximizing function and task of UPTD KKLD. WO strategies (Weakness - Opportunity) are increasing monitoring, give training on coral reef conservation, improving partnership in management, and increasing quality and quantity of KKLD human resources. ST strategies are (Strength – Threats) socialization of regulation, increasing effective coordination among stake holder, accurate analysis of environmental impact and improve research and sustainable diversification on fishing businesses. WT strategies are (Weakness-Threats) compliance to law, involving all parties in every decision made and making a good coastal areas plan.
STRUKTUR KOMUNITAS MAKROZOOBENTOS PADA TIGA MUARA SUNGAI SEBAGAI BIOINDIKATOR KUALITAS PERAIRAN DI PESISIR PANTAI AMPENAN DAN PANTAI TANJUNG KARANG KOTA MATARAM LOMBOK HUSNAYATI HARTINI; I Wayan Arthana; Joko Wiryatno
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 7 No 2 (2012)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

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Abstract

Increasing the human activity may lead to decrease utilization of river waters quality. The purpose of this study were to find out structure of macrozoobenthos community as bioindicator of waters quality in three estuaries of Ampenan district; find out the chemical and physical conditions of waters; determine the relationship of physical chemical of waters and macrozoobenthos diversity indices. The study was conducted by dividing of each estuary into 10 stations. Community structure and physical chemical waters parameters was analyzed descriptively. The relationship of physical and chemical waters quality parameters with macrozoobenthos diversity indices was analyzed by regression. The results showed that 8 species found in the estuary of Berenyok, 11 species in the estuary of Ancar and 12 species in the estuary of Jangkok. Conditions of community structure in three estuaries balanced enough up to unstable. Physical and chemistry waters quality in three estuaries are still below the quality standard except for Hg. In Berenyok and J angkok estuaries Hg values obtained in excess of standard quality. Pollution levels in the three estuaries ranging from moderate to heavily polluted. There is a linear correlation between macrozoobenthos diversity indices and DO parameter in each estuary.
THE POTENTIAL OF CHITINASE ENZYMES PRODUCED BY CHITINOLYTIC BACTERIA ISOLATED FROM SHRIMP SHELLS AS BIOCONTROL CANDIDATES IN CONTROLLING PLANT PESTS Faldy Efriant Pangemanan; Ida Bagus Gede Darmayasa; Joko Wiryatno
SIMBIOSIS Vol 8 No 1 (2020)
Publisher : Jurusan Biologi Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (377.09 KB) | DOI: 10.24843/JSIMBIOSIS.2020.v08.i01.p01

Abstract

Plant pests is one of the problem in agriculture sector that can cause decreasing of harvest productivity. Plant pest invasion will be increased in rainy season, so it need to be controlled. Biological control by chitinolytic bacteria is one of many ways to avoid the using of chemical pesticide. The purpose of this research to find the type of chitinolytic bacteria and utilizing the enzyme chitinase as plant pest biocontrol. Test has been done with spray method of 5 mL with 10%, 20%. 30%, 40% and 50% concentration with 7 treatments include positive and negative controls and 3 repetition. Observation of larva death done for 24 hours after spray, where every 6 hours observations are made. Pseudomonas is a genus that has been identified as chitinolytic bacteria. Larva death is indicated by with percentage result insignificant death which is shown at the 10 – 30% concentration. The percentage result significant death which is shown at the 40 – 50% concentration. 40% and 50% is most effective concentration in killing fruit fly (Drosophila sp.).
Co-Authors Ahmad Subhan Anak Agung Gde Raka Dalem Deny Suhermawan Yusup Dionisius Darmawan Sutanto Faldy Efriant Pangemanan Husnayati Hartini I Gede Agus Pradana Putra I Gusti Ayu Sugi Wahyuni I Gusti Putu Ayunda Pratiska I Wayan Arthana I.P.G Ardhana Ida Bagus Gede Darmayasa Ida Bagus Made Suaskara IRIANI SETYAWATI Job Nico Subagio Lalu Samsul Rizal MADE SUSUN PARWANAYONI N.K Mardani Ngurah Intan Wiratmini Ni Luh Eka Wulandewi Ni Putu Mery Yanti ROLINDA INNEKE FOENAY Timothy Herman Laning