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All Journal Jurnal Ilmu Pertanian Indonesia Journal of Marine Research Biota: Jurnal Ilmiah Ilmu-Ilmu Hayati Jurnal Kelautan Tropis JURNAL ENGGANO Jurnal Sumberdaya Akuatik Indopasifik Jurnal Biologi Tropis Aquasains : Jurnal Ilmu Perikanan dan Sumberdaya Perairan Jurnal Ilmu Kelautan Kepulauan Samakia: Jurnal Ilmu Perikanan Jurnal Iktiologi Indonesia (Indonesian Journal of Ichthyology) Musamus Fisheries and Marine Journal VOGELKOP: Jurnal Biologi Jurnal Perikanan Pantura Cassowary Jurnal Natural IGKOJEI: Jurnal Pengabdian Masyarakat Igya ser hanjop: Jurnal Pembangunan Berkelanjutan Bioscientist : Jurnal Ilmiah Biologi ACROPORA: Jurnal Ilmu Kelautan dan Perikanan Papua

Emmanuel Manangkalangi

Jurusan Perikanan, Fakultas Perikanan Dan Ilmu Kelautan, Universitas Papua, Manokwari

Author-ID : 3092235

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Education Environmental Science Immunology & microbiology Mathematics Physics Social Sciences Veterinary Other

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

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.

Pola Pertumbuhan Gastropoda Monetaria annulus di Teluk Doreri Yuventus Wale Wake; Roni Bawole; Emmanuel Manangkalangi; Luky Sembel; Ridwan Sala
Jurnal Kelautan Tropis Vol 25, No 1 (2022): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v25i1.12293

Manokwari coastal waters are one of the coastal areas that experience very rapid development of development activities from year to year. This condition can disrupt the ecosystem and can also interfere with the growth of gastropods, especially Monetaria annulus. This research was conducted in three locations (Yenkarwar Beach, Nusmapi Island, and Tanjung Manggewa) for two months (October and November 2020). The purpose of this study was to describe the relationship between length and weight, as well as the growth pattern of the gastropod M. annulus in Doreri Bay. Data was collected using a square with a length of 100 m with a width adjusted to the width of the seagrass bed towards the sea. Especially for the location of the waters of Yenkarwar Beach, no individual M. annulus was found during the sampling. The results showed a relationship between length and weight at the locations of Nusmapi I. and Tanjung Manggewa, respectively, namely BT = 0.0017PC2.3883 and BT = 0.0005PC2.8188. The growth pattern of this species from both locations showed that the shell length increased faster than its body weight (negative allometric pattern). The value of b as a derivative of growth indicates better conditions in the sample at Tanjung Manggewa than on Nusmapi Island. This difference in value can be an illustration of the condition of the M. annulus habitat and therefore information on the relationship between length and weight of growth patterns becomes important in efforts to monitor population conditions and their preservation in natural habitats. Perairan pesisir Manokwari merupakan salah satu wilayah pesisir yang mengalami perkembangan kegiatan pembangunan yang sangat pesat dari tahun ke tahun. Kondisi ini dapat mengganggu ekosistem dan juga dapat mengganggu pertumbuhan gastropoda, khususnya Monetaria annulus. Penelitian ini dilakukan di tiga lokasi (perairan Pantai Yenkarwar, Pulau Nusmapi, dan Tanjung Manggewa) selama dua bulan (Oktober dan November 2020). Tujuan dari penelitian ini yaitu untuk mendeskripsikan hubungan panjang dan berat, serta pola pertumbuhan gastropoda M. annulus di Teluk Doreri. Pengumpulan data dilakukan dengan menggunakan kuadrat dengan panjang 100 m dengan lebar yang disesuaikan dengan lebar hamparan lamun ke arah laut. Khusus untuk lokasi perairan Pantai Yenkarwar tidak ditemukan individu M. annulus selama sampling dilakukan. Hasil penelitian menunjukkan hubungan panjang dan berat pada lokasi P. Nusmapi dan Tanjung Manggewa secara berturut-turut, yaitu BT = 0,0017PC2,3883 dan BT = 0,0005PC2,8188. Pola pertumbuhan spesies ini dari kedua lokasi menunjukkan pertambahan panjang cangkang lebih cepat dibandingkan berat tubuhnya (pola alometrik negatif). Nilai b sebagai derivat dari pertumbuhan menunjukkan kondisi yang lebih baik pada sampel di lokasi Tanjung Manggewa dibandingkan Pulau Nusmapi. Perbedaan nilai ini bisa menjadi gambaran kondisi habitat M. annulus dan oleh karena itu informasi mengenai hubungan panjang dan berat pola pertumbuhan menjadi penting dalam upaya pemantauan kondisi populasi dan pelestariannya di habitat alami.

Struktur Vegetasi Riparia dan Implikasinya Terhadap Kondisi Habitat Ikan Pelangi Arfak, Melanotaenia Arfakensis di Sungai Nimbai, Manokwari Papua Barat Paskalina Th. Lefaan; Hans Fence Zakeus Peday; Simon Petrus Oktovianus Leatemia; Luky Sembel; Emmanuel Manangkalangi
Samakia : Jurnal Ilmu Perikanan Vol 10 No 1 (2019): Samakia: Jurnal Ilmu Perikanan
Publisher : Faculty of Science and Technology University Ibrahimy

Riparian vegetation has an important role in maintaining water stability, one of which is the river. This study aims to describe the structure of riparian vegetation so that its implications can be seen for the conditions of rainbow arfak habitat on the Nimbai River. The study was conducted in three forest types, namely primary riparia forest, secondary riparia forest and open riparia forest. Sample collection of riparian vegetation was carried out by purposive sampling using sample plots. Plots measuring 2 m x 2 m are used to sample seedling and understorey growth, plots measuring 5 m x 5 m for growth at the stake level, while plots measuring 10 m x 10 m and 20 m x 20 m, for growth of pole and tree levels respectively. The identification results obtained a total of 35 species of understorey and 51 tree-level plants in all three types of riparian forests. Based on the analysis of vegetation structure, it is known that the condition of primary riparia forest and secondary riparian forest still relatively supports the life of arfak rainbow fish compared to open riparian forest. Higher tree level density associated with canopy cover which has implications for the temperature of the water to be colder and less fluctuating, input larger litter into the food chain in the river, and hold suspended particles into the river. Also, the function of riparian vegetation in spawning activities, substrate attaching eggs and nursery habitat for arfak rainbow fish larvae. The results of this study indicate the importance of riparian vegetation structure on the condition of rainbow arfak fish habitat. An understanding of the structure of vegetation is also a basic information for efforts to rehabilitate this endemic fish habitat to maintain the existence of a natural population.

The potential of arfak rainbowfish Melanotaenia arfakensis Allen 1990 as biocontrol of mosquito larvae Emmanuel Manangkalangi; Simon P. O. Leatemia; Paskalina Th. Lefaan; Hans F. Z. Peday; Luky Sembel
Jurnal Iktiologi Indonesia Vol 15 No 2 (2015): June 2015
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v15i2.65

Research on the potency of arfak rainbowfish as a biocontrol of mosquito larvae was held in Fisheries Laboratory FPPIK, the Universitas Negeri Papua from August to November 2013. The aim of this study was to describe the potency of arfak rainbowfish as a biocontrol of mosquito larvae and compared it with two introduction fish species, Gambusia affinis and Aplocehilus panchax. All of the three species collected from Prafi River, Manokwari were acclimatized for one month in the laboratory. Male individuals were selected and grouped into four size classes according to body length. Three individuals were chosen to represent each species in each size class. Each individual was treated with mosquito larvae (stage IV instars and pupae) of 100 individuals separately, as well as 50 individual instars and pupae simultaneously. The level of predation and selectivity of both prey types was recorded, within 15-minute observation period. All of the three species showed levels of predation on instars and pupae increased with increasing body size. The level of predation on instars was higher than the pupae when the two treatment preys were treated separately. Furthermore, the predation level of arfak rainbowfish on instars and pupae higher than the other two fish species in all size classes, and also the relative degree of selectivity did not differ between the two types of prey in each size class. These results as well as other criteria, indicates M. arfakensis has potential as a biocontrol agent to mosquito larvae. Abstrak Penelitian potensi ikan pelangi arfak sebagai biokontrol larva nyamuk dilaksanakan di laboratorium Laboratorium Perikanan FPPIK Universitas Negeri Papua pada bulan Agustus sampai November 2013. Tujuan penelitian ini untuk mendeskripsikan potensi ikan pelangi arfak sebagai biokontrol larva nyamuk dan membandingkannya dengan dua spesies ikan introduksi Gambusia affinis dan Aplocheilus panchax. Ketiga spesies ini dikoleksi dari daerah aliran Sungai Prafi, Manokwari yang diaklimatisasi selama satu bulan di laboratorium. Dipilih individu jantan dan dikelompokkan berda-sarkan panjang tubuh ke dalam empat kelas ukuran. Tiga individu dipilih mewakili setiap spesies dan kelas ukuran. Setiap individu diberi perlakuan dengan larva nyamuk (tahap instar IV dan pupa) sebanyak 100 individu secara terpisah, serta 50 individu instar dan pupa secara bersamaan. Tingkat pemangsaan dan pilihan kedua tipe mangsa ini dicatat, waktu pengamatan 15 menit. Ketiga spesies menunjukkan tingkat pemangsaan terhadap instar dan pupa semakin meningkat dengan sema-kin besarnya ukuran tubuh, tingkat pemangsaan terhadap instar lebih tinggi dibandingkan pupa pada perlakuan pemberian kedua mangsa secara terpisah. Selanjutnya, tingkat pemangsaan ikan pelangi arfak terhadap instar dan pupa lebih tinggi dibandingkan kedua spesies ikan lainnya pada semua kelas ukuran, serta tingkat pilihan yang relatif tidak berbeda di antara kedua tipe mangsa pada setiap kelas ukuran. Hasil penelitian ini dan juga kriteria lainnya, menunjukkan bahwa ikan pelangi arfak memiliki potensi sebagai agen biokontrol terhadap larva nyamuk.

Kondisi habitat ikan pelangi arfak, Melanotaenia arfakensis Allen, 1990 di Sungai Nimbai, Prafi Manokwari [Habitat condition of arfak rainbowfish, Melanotaenia arfakensis Allen, 1990 at Nimbai Streams, Prafi Manokwari] Emmanuel Manangkalangi; Simon P. O. Leatemia; Paskalina Th. Lefaan; Hans F. Z. Peday; Luky Sembel
Jurnal Iktiologi Indonesia Vol 14 No 1 (2014): Februari 2014
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v14i1.93

This research aimed to describe habitat condition of endemic arfak rainbowfish, Melanotaenia arfakensis at Sungai Nimbai on June-July and September-October 2012. The study site consisted of seven sampling stations for organisms and environmental qualities, from upstream to downstream segment, and each of these stations divided into two habitat types, ie. slow littoral and run areas. The parameters of habitat quality were measured and analysed such as current water, temperature, dissolved oxygen, pH, grease and oil concentration, riparian vegetation, macroinvertebrates composition and abundance, also fish composition and distribution. Riparian vegetation sampling was done at stream sides using 4 m2 plot for seedling and 400 m2 for sapling, pole, and tree categories. Macroinvertebrate and fish at two habitat types were collected using surber of 0.0625 m2 and hand net. The result showed that arfak rainbow-fish were only found at upstream segment. The presence of the species was related to physical and chemical parameters condition that supporting their life, also related to the availability of spawning and nursering habitat for larvae, and the aquatic insects as their food. The absence of the fish at downstream segment, maybe due to the degradation of their habitat condition that related to decreasing riparian vegetation coverage and organic waste flow to stream system, and also the presence of alien fish. The study showed decreasing of the quality and suitable habitat areal for this endemic species decrease, therefore it is need to conserve the natural habitat as the effort to maintain the sustainability of this species populations. Abstrak Penelitian ini bertujuan untuk mendeskripsikan kondisi habitat ikan pelangi arfak, Melanotaenia arfakensis yang endemik di Sungai Nimbai pada bulan Juni-Juli dan September-Oktober 2012. Pada lokasi ini ditetapkan tujuh stasiun pengambilan contoh organisme dan parameter lingkungan dari segmen di bagian hulu sampai ke arah hilir masing-masing dengan dua tipe habitat, yaitu tepi sungai beraliran lambat dan daerah beraliran deras. Parameter kualitas habitat yang diukur meliputi kecepatan aliran air, suhu air, gas oksigen terlarut, pH, konsentrasi minyak dan lemak, kondisi vegetasi riparian, kom-posisi dan kepadatan makroavertebrata air, serta komposisi dan penyebaran spesies ikan. Pengumpulan contoh vegetasi riparian tepi sungai menggunakan petak contoh berukuran 4 m2 untuk tingkat semai dan 400 m2 untuk tingkat pancang, tiang, dan pohon. Pengumpulan contoh makroavertebrata dan ikan kedua tipe habitat menggunakan surber berukuran 0,0625 m2 dan hand net. Hasil penelitian ini memperlihatkan ikan pelangi arfak hanya ditemukan pada segmen sungai di bagian hu-lu. Keberadaan spesies ini berkaitan dengan kondisi parameter fisik-kimiawi perairan yang mendukung kehidupan-nya, tersedianya habitat pemijahan dan perlindungan bagi larva, dan tersedianya makanan berupa insekta air. Keti-dak hadiran ikan ini pada segmen sungai di bagian ke arah hilir disebabkan oleh menurunnya kualitas habitat yang berkaitan dengan berkurangnya tutupan vegetasi riparian dan masuknya limbah organik ke dalam sistem sungai, serta kebera-daan ikan asing. Hasil ini memperlihatkan terjadinya penurunan kualitas dan luasan habitat yang layak bagi spesies ikan ende-mik ini. Oleh karena itu perlu adanya upaya pelestariannya melalui konservasi habitat alami agar populasinya tetap lestari.

Preferensi makanan ikan pelangi arfak, Melanotaenia arfakensis Allen, 1990 di Sungai Nimbai dan Sungai Aimasi, Manokwari [Food preference of arfak rainbowfish, Melanotaenia arfakensis Allen, 1990 in Nimbai and Aimasi Streams, Manokwari] Emmanuel Manangkalangi; M.F. Rahardjo; Djadja S. Sjafei; Sulistiono Sulistiono
Jurnal Iktiologi Indonesia Vol 10 No 2 (2010): Desember 2010
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v10i2.164

The study of food preference of arfak rainbowfish (Melanotaenia arfakensis) in Nimbai and Aimasi streams, and Prafi river system were conducted from June to December 2007. Sampling was carried out monthly for seven months in four different habitat types, i.e. slow littoral, still littoral, pool, and run areas. Results showed that abundance of plankton and macroinvertebrate were found both in slow littoral and medium littoral, especially during low flow period (June to October). Macroinvertebrate that found naturally abundance are insect groups. Arfak rainbowfish are insectivorous, with preponderance index of stomach content during these periods are dominated by insect groups, i.e. Diptera, Ephemero-ptera, Coleoptera, and Trichoptera, so this species categorized as insectivorous. Also, electivity index showed a trend of food specification that naturally abundance. In order to maintain the population of arfak rainbowfish, conservation of their natural habitats is needed, especially riparian zone in channel of stream as its site of food source. AbstrakPenelitian preferensi makanan ikan pelangi arfak (Melanotaenia arfakensis) di Sungai Nimbai dan Aimasi di sistem Sungai Prafi dilaksanakan dari bulan Juni sampai Desember 2007. Pengambilan contoh dilakukan pada empat tipe habitat di dua lokasi penelitian, yaitu: bagian tepi beraliran lambat, bagian tepi beraliran sedang, lubuk, dan daerah beralir-an deras. Hasil penelitian memperlihatkan bahwa kelimpahan plankton dan makroavertebrata ditemukan pada tipe habitat beraliran lambat dan sedang pada saat kondisi debit air rendah (Juni-Oktober). Makroavertebrata yang ditemukan berlimpah adalah kelompok insekta. Ikan pelangi arfak adalah insektivora, terutama didominasi oleh kelompok insekta, ya-itu Diptera, Ephemeroptera, Coleoptera, dan Trichoptera. Indeks pilihan menunjukkan adanya kecenderungan pemilihan makanan yang terdapat dalam kondisi melimpah di perairan. Guna menjaga kelestarian ikan ini, konservasi habitat alaminya sangat diperlukan, terutama zona riparian yang merupakan tapak sumber daya makanannya.

MUSIM PEMIJAHAN IKAN PELANGI ARFAK (Melanotaenia arfakensis ALLEN) DI SUNGAI NIMBAI DAN SUNGAI AIMASI, MANOKWARI [Spawning Season of Arfak Rainbowfish (Melanotaenia arfakensis Allen) in Nimbai and Aimasi Streams, Manokwari] Emmanuel Manangkalangi; M. F. Rahardjo; Djadja S. Sjafei; Sulistiono Sulistiono
Jurnal Iktiologi Indonesia Vol 9 No 1 (2009): Juni 2009
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v9i1.195

The study was aimed to describe the spawning season of arfak rainbowfish (Melanotaenia arfakensis) in Nimbai and Aimasi streams, both are located in Prafi river system. Sampling was conducted from June to December 2007 and carried out monthly in four different habitat types using hand net. A total of 752 individual specimens were collected and consisted of five developmental stages, namely egg, larvae, juvenile, young and adult. There was no different proportion in both sexes, either habitat type or time. This species has relatively low fecund, producing approximately 23-1,351 eggs with relatively large diameter (0.5-1.3 mm). Large egg diameter was distributed in posterior of ovaries, with 2-3 modes, and presence of atretic eggs, and was indicated as multiple spawner fish. However, based on gonado somatic index, condition factor, presence of eggs and larva in limited period showed that there were increased reproductive activities in both locations from June to September, with low water flow condition. Concentration of reproduction activity during dry season to ensure that larva was produced relatively stable and in benign physical condition. In order to maintain the population of this species, both of these streams should be reserved as their natural habitats, thereby its life cycles could go on.

Feeding effectivity of the arfak rainbowfish, Melanotaenia arfakensis, Allen 1990 on difference of water turbidity level: a laboratory approach Emmanuel Manangkalangi; M. F. Rahardjo; Renny K. Hadiaty; Sigid Hariyadi
Jurnal Iktiologi Indonesia Vol 17 No 3 (2017): October 2017
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v17i3.367

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. Abstrak Penelitian 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.

Trophic ecology of fish community at Nimbai Stream: Competition and predation interaction to Arfak rainbowfish, Melanotaenia arfakensis Allen, 1990 Emmanuel Manangkalangi; M. Fadjar Rahardjo; Renny K Hadiaty; Sigid Hariyadi; Charles P. H. Simanjuntak
Jurnal Iktiologi Indonesia Vol 19 No 3 (2019): October 2019
Publisher : Masyarakat Iktiologi Indonesia (Indonesian Ichthyological Society)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32491/jii.v19i3.505

Information on trophic ecology can provide an understanding of the functional role of fish in an ecosystem, including endemic and native fish groups, as well as alien fish that are introduced through anthropogenic activities. The research on the trophic ecology of the fish community in the Nimbai Stream, Prafi River system, is intended to describe the interaction of competition and predation, especially towards endemic fish, Melanotaenia arfakensis. Fish samples were collected monthly from four habitat types, i.e., slow littoral, medium littoral, pool, and run from May 2016 to April 2017. A combination of an electric shocker and a hand net was used to collect fish samples. A total of 16 fish species were collected, consists of one endemic species, namely M. arfakensis, nine species of native fish, and six species of alien fish. The Arfak rainbowfish and three native fish species were categorized as insectivorous, four native fish species as herbivorous, and two other fishes as carnivorous. Three alien fish species also belong to insectivorous, two alien fish species as carnivorous, and one species as herbivorous. The niche breadth of fish communities ranges from 0.071 to 0.857. The trophic niche overlap between the Arfak rainbowfish and three native fish species and three alien fish species was recorded. The results of this study indicate a potential competition and predation interactions between Arfak rainbowfish and native fish as well as with alien fish species. Therefore, introducing alien fish into Prafi River system will disrupt Arfak rainbowfish population. Abstrak Informasi mengenai ekologi trofik dapat memberikan pemahaman tentang peran fungsional ikan dalam suatu ekosis-tem, termasuk pada kelompok ikan endemik, ikan asli, maupun ikan asing yang dimasukkan melalui aktivitas antro-pogenik. Penelitian mengenai ekologi trofik komunitas ikan di Sungai Nimbai, sistem Sungai Prafi, bertujuan untuk mendeskripsikan interaksi kompetisi dan pemangsaan, khususnya terhadap ikan endemik, Melanotaenia arfakensis. Contoh ikan dikumpulkan setiap bulan dari Mei 2016-April 2017 di empat tipe habitat yakni tepi aliran lambat, tepi aliran sedang, lubuk, dan aliran deras. Kombinasi alat electric shocker dan hand net digunakan untuk mengumpulkan contoh ikan. Sebanyak 16 spesies ikan berhasil dikumpulkan yang terdiri atas satu jenis ikan endemik (M. arfakensis), sembilan jenis ikan asli, dan enam jenis ikan asing. Ikan pelangi arfak dan tiga jenis ikan asli termasuk insektivora, empat jenis ikan asli adalah ikan herbivora, dan dua jenis ikan asli lainnya termasuk ikan karnivora. Tiga spesies ikan asing juga termasuk ikan insektivora, dua jenis ikan asing adalah ikan karnivora, dan satu spesies ikan asing lainnya adalah ikan herbivora. Luas relung komunitas ikan berkisar di antara 0,071-0,857. Tumpang tindih relung makanan ditemukan antara ikan pelangi arfak dengan tiga spesies ikan asli serta tiga spesies ikan asing. Hasil penelitian ini menunjukkan adanya potensi interaksi kompetisi dan pemangsaan antara ikan pelangi arfak dan ikan asli serta dengan ikan asing. Introduksi ikan asing ke dalam sistem Sungai Prafi ditengarai akan mengganggu populasi ikan pelangi arfak.

KUALITAS PERAIRAN DI TELUK DORERI KABUPATEN MANOKWARI Luky Sembel; Emmanuel Manangkalangi; Zulfikar Mardiyadi; Abraham W Manumpil
JURNAL ENGGANO Vol 4, No 1
Publisher : Universitas Bengkulu

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.

Co-Authors Abdul Hamid A. Toha Abraham W Manumpil Abraham William Manumpil Agatha Cecilia Maturbongs Agnestesya Manuputty Agnestesya Manuputty, Agnestesya Agustinus Kilmaskossu Alfarani Bawole, Christover Alianto , Bayu Pranata Bayu Pranata, Bayu Bernadus Duwit Bleskadit, Orgenes Charles Parningotan Haratua Simanjuntak Christina Recharda Rusianti Dandi Saleky Daud Orisu Dedi Parenden Defri Yona Djadja S. Sjafei Dwi Setijawati Eda Putri Santi Elsha Prangin Angin Endriano Manalu Endriano Manalu Fajar R.D.N Sianipar Fajar Ria Dwi Natalia Sianipar Fanny Fransina Carolina Simatauw Firdaus, Alif Fitriyah I. E. Saleh Fitriyah I.E Saleh Fitriyah Irmawati Elyas Saleh Fredy C. Eldiester Fredy Christian Eldiester Dan Frida Aprilia Loinenak, Frida Aprilia Frits N. Y. Rumbino Frits N. Y. Rumbino Handayani, Prisilia Hans F. Z. Peday Hans Fence Zakeus Peday Husaema Ida Lapadi Jemmy Manan Jeni, Jeni Johanis P. Kilmaskossu Johanis Paulus Kilmaskossu Kaber, Yuanike Karubuy, Randy Imanuel Sandy Kolibongso, Duait Leatemia, Neafha G. Lenny S. Syafei Luky Sembel Luky Sembel Luky Sembel Luky Sembel M F Rahardjo M. F. Rahardjo M. F. Rahardjo M. F. Rahardjo M. Fadjar Rahardjo M. Fadjar Rahardjo M. Fadjar Rahardjo M.F. Rahardjo M.F. Rahardjo Manan, Jemmy Manohas, Feronika Maria .J. Sadsoeitoeboen Maturbongs, Agatha Cecilia Milansari, Sindi Mina Regina Rumayomi Moses Peday Mudjirahayu Mudjirahayu Mudjirahayu Mudjirahayu Mudjirahayu Mudjirahayu Muhammad Dailami, Muhammad Musyeri, Philipus Natasya, Cendy Nurhani - Widiastuti Nurhani Widiastuti Nurhani Widiastuti Paskalina T Lefaan Paskalina T. Lefaan Paskalina Theresia Lefaan Paulus Boli Philipus Musyeri Prasetyo, Tri Aji Purba, Gandi Y.S. Purba, Gandi Yantri Sevantina Randy Imanuel Sandy Karubuy Renny K Hadiaty Renny K. Hadiaty Renny K. Hadiaty Ridwan Sala Roni Bawole Rumbiak, Ruben B. Saleh, Fitriyah I.E. Saleky, Dandi Saputra, Reyfado W. Satriano N Yoku Selfanie Talakua Selfanie Talakua, Selfanie Selvi Tebaiy Selvi Tebay Sembay, Elsa Ancolina Sembel, Luky Sembel, Luky Setiawan Mangando Setiawan Mangando Sigid Hariyadi Simatauw, Fanny F. C Simatauw, Fanny Fransina Carolina Simon P. O. Leatemia Simon P. O. Leatemia Simon P.O. Leatemia Simon Petrus Octovianus Leatemia Simon Petrus Oktovianus Leatemia Simon Petrus Oktovianus Leatemia Sisilia Mudarehi Slamet Arif Susanto Sulistiono Sulistiono Suruan, Sampari S. Suruan, Sampari Saneraro Syafrudin Raharjo Tebaiy, Selvi Tebay, Selvi Thomas Frans Pattiasina Thomas, Juniati Tanduk Trisnawaty Rica Florentina Siahaan Tutik Handayani Tutik Handayani, Tutik Vera Sabariah Vera Sabariah, Vera Wamaer, Yolanda Widiastuti, Nurhani - Wikram, Wikram Yembise, Leo Y. Yemima Kaliele, Mariance Yenny Risjani Yohanes Aibesa Yuanike Kabera, Yuanike Yulianti Elisabet Demena Yulianti Elisabet Demena Yunus Baab Yuventus Wale Wake Zulfikar Mardiyadi

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