Articles

Found 6 Documents
Search

Makroavertebrata Bentos sebagai Bioindikator Kualitas Air Sungai Nimbai Manokwari, Papua Barat Leatemia, Simon Petrus Oktovianus; Manangkalangi, Emmanuel; Lefaan, Paskalina Theresia; Peday, Hans Fence Zakeus; Sembel, Luky
Jurnal Ilmu Pertanian Indonesia Vol 22, No 1 (2017): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (632.349 KB) | DOI: 10.18343/jipi.22.1.25

Abstract

Benthos macroinvertebrates have been used as bioindicators to assess the waters quality of the stream, but still are very rarely to applied in West Papua streams. Benthos macroinvertebrates can describe the stream water quality so that very well be used as bioindicators, due to each species has a different tolerance to interference organic pollutants in waters. This study aimed to assess the water quality of Nimbai stream using benthos macroinvertebrates tolerance level and several water quality parameters. Data retrieval was conducted in JuneJuly and SeptemberOctober 2012 in seven stations (L1L7) from Nimbai upstream to downstream that connected to Prafi river. The water macroinvertebrates were taken using surber with mesh size 200 μm and then was identified at the family level. At L5 station near the oil palm waste disposal installations was contains oil and fat (<1-3 mg/l), which resulted in dissolved oxygen (DO) and pH is lower than the other stations. Similarly the value of H is low (0.83), however, the value of C (0.79) was high that dominated by Oligochaeta. Famili biotic index (FBI) value obtained showed that water quality in the L1L4 stations was in good to excellent condition, but the quality at L5 station is classified as very poor. As the distance far away from the sources of pollution in the L5 station, water quality tends to improve as shown in the L6 and L7 stations. The result of this study shows the important benefits of benthos macroinvertebrates as bioindicators for assessing the quality of stream waters, and can be described aquatic environments disturbance to the benthos macroinvertebrates habitats in Nimbai stream.
Feeding effectivity of the arfak rainbowfish, Melanotaenia arfakensis, Allen 1990 on difference of water turbidity level: a laboratory approach Manangkalangi, Emmanuel; Rahardjo, M. F.; Hadiaty, Renny K.; Hariyadi, Sigid
Jurnal Iktiologi Indonesia Vol 17, No 3 (2017): October 2017
Publisher : Masyarakat Iktiologi Indonesia (MII )

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (916.352 KB) | DOI: 10.32491/jii.v17i3.367

Abstract

The research on feeding effectivity of arfak rainbowfish conducted at Fisheries Laboratory, Faculty of Fishes and Marine Scince, University of Papua in July to December 2016. The purpose of this research is to describe feeding effectivity of the fish at several levels of water turbidity. The fish samples used in the treatment, collected from Nimbai Stream, Prafi River system, Manokwari were acclimatized for a month in the laboratory. The fish were selected based on the body length and categorized into six size classes. Each individual of the fish was treated with 200 individuals of mosquito larvae (instar IV stage) at seven turbidity levels (2.54, 25.07, 50.52, 100.20, 500.60, and 800.40 Nephelome-tric Turbidity Unit, NTU) using particles with size of <63um. Feeding effectivity was indicated by the level of preda-tion in a period of 15 minutes. The results of the research showed that average level of predation did not differ among size classes at the low level of turbidity (<50,52 NTU). The significant decrease in the average level of predation occurred at the higher level of turbidity (<100,12 NTU) with the values range from 23.2% to 65.9%. This indicated a decrease in the feeding effectivity as the turbidity levels increase. AbstrakPenelitian efektivitas ikan pelangi arfak dalam mencari makan dilaksanakan di Laboratorium Perikanan FPIK Univer-sitas Papua pada bulan Juli sampai Desember 2016. Tujuan penelitian ini untuk mendeskripsikan efektivitas ikan pela-ngi arfak mencari makan pada beberapa tingkat kekeruhan air. Contoh ikan yang digunakan dalam perlakuan dikoleksi dari Sungai Nimbai, sistem Sungai Prafi, Manokwari yang diaklimatisasi selama satu bulan di laboratorium. Individu ikan yang digunakan dalam penelitian ini dipilih berdasarkan panjang tubuh dan dikelompokkan ke dalam enam kelas ukuran. Setiap individu ikan diberi perlakuan pakan berupa larva nyamuk (tahap instar IV) sebanyak 200 individu pada tujuh tingkat kekeruhan yang berbeda (2,54; 25,07; 50,52; 100,20; 200,20; 500,60 dan 800,40 Nephelometric Turbidity Unit, NTU) dengan menggunakan partikel berukuran <63um. Efektivitas mencari makan akan ditunjukkan berdasarkan tingkat pemangsaan dalam periode 15 menit. Tingkat pemangsaan rata-rata tidak berbeda pada tingkat kekeruhan yang rendah (<50,52 NTU) dalam setiap kelas ukuran. Penurunan tingkat pemangsaan rata-rata secara nyata mulai berlang-sung pada tingkat kekeruhan yang lebih tinggi (<100,12 NTU) dengan nilai sebesar 23,2%-65,9%. Kondisi ini menun-jukkan penurunan efektivitas mencari makan seiring dengan semakin meningkatnya tingkat kekeruhan air.
IKTIOFAUNA AIR TAWAR PADA BEBERAPA SUNGAI DI AIFAT TIMUR, MAYBRAT, PAPUA BARAT Manangkalangi, Emmanuel
VOGELKOP: Jurnal Biologi Vol 1, No 1 (2018)
Publisher : Jurusan Biologi, FMIPA, Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (556.061 KB) | DOI: 10.30862/vogelkopjbio.v1i1.22

Abstract

ABSTRACTSeven fish species from seven families are found during this study. The most common species found are Melanotaenia irianjaya (9/10 sites). No introduced species were found in any of the sites. Species richness ranged from 1-5 species per site and was highest in Aikrer Usem stream and Aisen stream. This difference between sites is partially attributed to position in order system and fishing effort. Higher order which is a combination of several creeks provided more diverse microhabitat than the lower ones, thus supporting higher fish diversity. A total of three species (42.9%) which endemic to southern Vogelkop Peninsular and northern Bomberai. Most of species are found including carnivorous, with diet consisted of aquatic and terrestrial insects, and the other benthic invertebrates. The presence of prey group is very closely related to the availability of riparian vegetation in the streams and creeks. Recommendations will include implementation of good forest management in the watershed to maintain the pattern of hydrology and water discharge in natural conditions, and also protection of riparian zones that exist as a source of energy for the stream ecosystem and as a buffer against an input from the terrestrial. ABSTRAKDitemukan tujuh spesies ikan dari tujuh famili selama penelitian ini. Spesies yang paling umum ditemukan adalah Melanotaenia irianjaya (9/10 lokasi). Tidak ditemukan spesies ikan introduksi pada lokasi survei. Kekayaan spesies ikan berkisar 1-5 spesies per lokasi dan paling tinggi ditemukan pada Sungai Aikrer Usem dan Sungai Aisen. Perbedaan di antara lokasi ini sebagian berhubungan dengan posisi dalam sistem ordo dan upaya penangkapan. Ordo yang lebih tinggi yang merupakan gabungan dari beberapa anak sungai menyediakan mikrohabitat yang lebih beranekaragam dibandingkan ordo yang lebih rendah, sehingga mendukung keankeragaman ikan yang lebih tinggi. Sebanyak tiga spesies (42,9%) endemik Semenanjung Vogelkop bagian selatan dan Bomberai bagian utara. Sebagian besar spesies yang ditemukan termasuk kelompok karnivora, dengan makannya terdiri danri insekta air dan darat, serta avertebrata bentik lainnya. Keberadaan kelompok mangsa ini sangat berkaitan erat dengan ketersediaan vegetasi riparia yang berada di bagian tepi sungai maupun anak sungai. Rekomendasi yang diberikan meliputi implementasi pengelolaan hutan yang baik di daerah tangkapan air untuk mempertahankan pola hidrologi dan kondisi debit air secara alami serta perlindungan zona-zona riparia yang ada sebagai sumber energi bagi ekosistem sungai dan sebagai penyanggah terhadap bahan masukan dari daratan.
PERTUMBUHAN, UMUR, DAN DIMORFISME SEKSUAL IKAN PELANGI ARFAK, Melanotaenia arfakensis Allen, 1990 DI SISTEM SUNGAI PRAFI, MANOKWARI, PAPUA BARAT Manangkalangi, Emmanuel; Leatemia, Simon P.O.; Sembel, Luky; Lefaan, Paskalina T.; Sala, Ridwan; Rahardjo, M.F.
VOGELKOP: Jurnal Biologi Vol 1, No 2 (2018)
Publisher : Jurusan Biologi, FMIPA, Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (590.279 KB) | DOI: 10.30862/vogelkopjbio.v1i2.52

Abstract

ABSTRACTArfak rainbow fish, Melanotaenia arfakensis is an endemic fish on several river systems in the northeastern part of the Vogelkop peninsula. This study aims to describe the growth, age at first maturity, and sexual dimorphism of this endemic fish on the Nimbai Stream and the Aimasi Stream, the Prafi River system. The fish were caught using handnet, then were measured their standard length and individual weight. Data were analyzed to estimated growth patterns, von Bertalanffy's growth rate, age at first maturity and sexual dimorphism characteristics. The results showed that male growth patterns varied, with a tendency of the increase in body length faster than that of body weight (negative allometric patterns) with b values ranging from 2.886 to 3.132. On the other hand, the female individuals had positive allometric patterns (b values ranged from 3.062 to 3.378). The growth rate (K) of male body length was faster (0.165-0.174) than that of female individuals (0.159-0.163). Male individuals reached the first maturity condition earlier (at age of 1.83-2.18 years) than female individuals (at age of 2.49-2.64 years). Sexual characteristics between the sexes are related to body height starting to appear when fish are of a standard length of larger than 18.22 mm or when male fish begin to approach the time of the first sexual maturity. Understanding of growth, age, and the characteristics of the sexual dimorphism of endemic fish has an important meaning in monitoring population conditions and for conservation efforts in their natural habitat.
KUALITAS PERAIRAN DI TELUK DORERI KABUPATEN MANOKWARI Sembel, Luky; Manangkalangi, Emmanuel; Mardiyadi, Zulfikar; Manumpil, Abraham W
JURNAL ENGGANO Vol 4, No 1 (2019): Jurnal Enggano
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jenggano.4.1.52-64

Abstract

Pasar Sanggeng, pasar Wosi, pelabuhan, PLTD (Pembangkit Listrik Tenaga Disel), perhotelan dan pemukiman penduduk yang terletak di pesisir Teluk Doreri Kota Manokwari, menjadi salah satu pusat aktivitas yang melayani kebutuhan masyarakat. Akibat adanya aktivitas yang tinggi tersebut menyebabkan pembungan sampah-sampah organik dan anorganik tidak terawasi atau terkontrol dengan baik. Kondisi ini berlangsung secara terus menerus setiap hari sehingga dapat menyebabkan terjadi degradasi kualitas perairan. Tujuan Penelitian yaitu untuk mengetahui status kualitas perairan di Teluk Doreri Kabupaten Manokwari. Penelitian dilakukan dari bulan Agustus tahun 2016 bertempat di Laboratorium Kelautan, Ilmu Kelautan Unipa dan Laboratorium Prolink IPB Bogor. Lokasi pengambilan sampel air di sekitar perairan Sawaibu, Wosi, Andai, Sowi dan Perairan Maruni. Data parameter yang diambil melalui pengukuran langsung dan tidak langsung. Pengukuran secara langsung meliputi parameter salinitas, pH, suhu dan oksigen terlarut. Sedangkan pengukuran tidak langsung dengan cara mengambil sampel air. Pengambilan sampel air digunakan untuk penentuan parameter kekeruhan, nitrat, fosfat dan logam berat. Sampel air tersebut langsung dimasukan dalam botol polyetelin dan dikirim ke Prolink IPB Bogor untuk dianalisis. Pengukuran mengacu pada Standard Methods for the Examination of Water and Wastewater (APHA, 1998). Hasil penelitian dari lima lokasi di perairan Teluk Doreri berkisar antara 0,17 – 6,16 NTU untuk kekeruhan, 4,64 – 5,04 untuk pH, 5,1 -6 mg/L untuk oksigen terlarut, 30 – 33 ‰ untuk salinitas, 29, 8 – 30,6 oC untuk suhu air, 0,1 -0,8 mg/L untuk nitrat dan fosfat berkisar 0,08 – 0,16 mg/L. Hasil logam berat cadmium (Cd) menunjukan potensi toksik yang tinggi bagi biota perairan di Teluk Doreri. Parameter logam berat cadmium, nitrat dan fosfat sangat mengkuatirkan serta dapat menyebabkan gangguan terhadap lingkungan khususnya bagi biota perairan. Parameter – parameter tersebut telah melampaui baku mutu yang ditetapkan kementerian lingkungan hidup no 51 tahun 2004.WATER QUALITY IN THE DORERI BAY DISTRICT MANOKWARI. Traditional markets (Pasar Sanggeng and Wosi), port, PLTD (Power Plant), hotels and residential areas are located in the cost of Doreri bay in Manokwari district. Activities in those areas create organic and inorganic wastes that have been used the Doreri bay as a water dump. The waste has been dumped since long time ago and continue up to nowadays.  That cause water quality degradation of Doreri bay. The research objective was to determine the status of water quality in Doreri Bay, Manokwari Regency. The water quality study has been carried out in August 2016 in Marine laboratory of UNIPA and Prolink laboratory in IPB. Water samples collected from Sawaibu, Wosi, Andai, Sowi and Maruni beach.  Data were divided base on the data collection which is directly and indirectly collected. Water salinity, pH, temperature and dissolved oxygen are direct data collection. Turbidity, nitrate, phosphate and heavy metals are indirect data collection that has been analyzed in Prolink IPB. The water has been analyses by using Standard Method for Examination of Water and Wastewater (APHA, 1998). The results show that turbidity of five areas range from 0.17 to 6.16 NTU, pH range from 4.64 to 5.04, dissolved oxygen between 5.1 -6 mg/L, water salinity range from 30-33%, water temperature between 29, 8 - 30.6 oC, 0.1 -0.8 mg/L for nitrate and phosphate between 0.08 - 0.16 mg/L. Heavy metal (cadmium) showed high potential toxic risk on the biota of Doreri bay. Cadmium, nitrate, and phosphate are a heavy metal that categorized as concerned pollutant to the Dorery bay. Those heavy metal have been exceeded the water quality standard base on Ministry of environment number 51-2004. 
Struktur Vegetasi Riparia dan Implikasinya Terhadap Kondisi Habitat Ikan Pelangi Arfak, Melanotaenia Arfakensis di Sungai Nimbai, Manokwari Papua Barat Lefaan, Paskalina Th.; Peday, Hans Fence Zakeus; Leatemia, Simon Petrus Oktovianus; Sembel, Luky; Manangkalangi, Emmanuel
Samakia : Jurnal Ilmu Perikanan Vol 10 No 1 (2019): Samakia: Jurnal Ilmu Perikanan
Publisher : Faculty of Science and Technology University Ibrahimy

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1432.354 KB) | DOI: 10.5281/jsapi.v10i1.258

Abstract

Vegetasi riparia memunyai peran penting dalam menjaga kestabilan perairan, salah satunya adalah sungai. Penelitian ini bertujuan untuk mendeskripsikan struktur vegetasi riparia sehingga dapat diketahui implikasinya terhadap kondisi habitat ikan pelangi arfak di Sungai Nimbai. Penelitian dilakukan pada tiga tipe hutan, yaitu hutan riparia primer, hutan riparia sekunder dan hutan riparia terbuka. Pengumpulan contoh vegetasi riparia dilakukan secara purposif sampling menggunakan petak contoh. Petak berukuran 2 m x 2 m digunakan untuk mencuplik pertumbuhan tingkat semai dan tumbuhan bawah, petak ukuran&nbsp; 5 m x 5 m untuk pertumbuhan tingkat pancang, sedangkan petak ukuran 10 m x 10 m dan 20 m x 20 m, masing-masing untuk pertumbuhan tingkat tiang dan pohon. Hasil identifikasi diperoleh total 35 jenis tumbuhan bawah dan 51 tumbuhan tingkat pohon di ketiga tipe hutan riparia. Berdasarkan hasil analisis struktur vegetasi diketahui bahwa kondisi hutan riparia primer dan hutan riparia sekunder masih relatif mendukung kehidupan ikan pelangi arfak dibandingkan hutan riparia terbuka. Kerapatan tingkat pohon yang lebih tinggi berkaitan dengan tutupan tajuk yang berimplikasi terhadap suhu air menjadi lebih dingin dan kurang berfluktuasi, masukan serasah lebih besar ke rantai makanan di sungai, dan menyanggah partikel tersuspensi masuk ke sungai. Juga fungsi vegetasi riparia dalam aktivitas pemijahan, substrat penempelan telur dan habitat pembesaran larva ikan pelangi arfak. Hasil penelitian ini menunjukkan arti penting struktur vegetasi riparia terhadap kondisi habitat ikan pelangi arfak. Pemahaman mengenai struktur vegetasi juga menjadi informasi dasar bagi upaya rehabilitasi habitat ikan endemik ini untuk mempertahankan keberadaan populasinya alami.