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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.

Akumulasi Biomasa Fitoplankton yang Diukur sebagai Klorofil-a di Perairan Teluk Doreri, Provinsi Papua Barat Alianto Alianto; Yorry Kambanussy; Luky Sembel; Baigo Hamuna
Jurnal Kelautan Tropis Vol 23, No 2 (2020): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v23i2.5428

The accumulation of phytoplankton biomass measured as chlorophyll-a is highly depends on the availability of ammonia and silicate in the waters. The purpuses of the study were examining the concentration of chlorophyll-a and its relation with ammonia and silicate in the waters of Doreri Bay, Manokwari Regency, West Papua Province. Water sampling is carried out at 10 stations. Parameters measured include chlorophyll-a, ammonia and silicate. The measurement results of chlorophyll-a concentration ranged from 0.23-3.77 μg/L with an meanof 0.82 μg/L. Ammonia and silicate concentrations ranged from 2.35-4.11 μM with an mean of 2.64 μM and 2.00-7.50 μM with an mean of 3.91 μM, respectively. The relationships of chlorophyll-a concentration with ammonia and silicate showed positive and negative relationships, respectively. Akumulasi biomasa fitoplankton yang diukur sebagai klorofil-a sangat tergantung pada ketersediaan amonia dan silikat di perairan. Penelitian bertujuan untuk mengetahui konsentrasi klorofil-a serta hubungannya dengan amonia dan silikat di perairan Teluk Doreri, Kabupaten Manokwari, Provinsi Papua Barat. Pengambilan contoh air dilakukan pada 10 stasiun. Parameter yang diukur meliputi klorofil-a, amonia dan silikat. Hasil pengukuran konsentrasi klorofil-a berkisar dari 0,23-3,77 μg/L dengan rata-rata sebesar 0,82 μg/L. Konsentrasi amonia dan silikat secara berturut-turut berkisar dari 2,35-4,11 μM dengan rata-rata sebesar 2,64 μM dan 2,00-7,50 μM dengan rata-rata sebesar 3,91μM. Hubungan konsentrasi klorofil-a dengan amonia dan silikat secara berturut-turut menunjukkan hubungan positif dan negatif.

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.

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.

Analisis Kandungan Logam Berat Kadmium (Cd) pada Gastropoda Conus spp. di Hamparan Lamun Perairan Pesisir Manokwari, Propinsi Papua Barat Randy Imanuel Sandy Karubuy; Jemmy Manan; Emmanuel Manangkalangi; Luky Sembel; Dandi Saleky
Jurnal Kelautan Tropis Vol 26, No 3 (2023): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v26i3.15872

Manokwari coastal waters are one of the coastal areas that experience very rapid development of development activities from year to year. This condition allows the input of waste such as heavy metal cadmium (Cd) into the waters of Manokwari. This research was conducted in the coastal area of Manokwari (BLK Beach, Lemon Island, and Tanjung Manggewa) for three months (February-April 2020). The purpose of this study was to describe the concentration of heavy metal cadmium (Cd) in Gastropod Conus on the Manokwari Coast and to determine the relationship between heavy metal content of cadmium (Cd) in Conus with shell size, wet weight, and dry weight. Data analysis includes Atomic Absorption Spectrophotometer (AAS), linear regression, and descriptive analysis. Based on the research results obtained, the average content of cadmium in Conus in Manokwari waters is 0.06-0.22 mg/kg. The heavy metal content in Conus is still below the specified threshold so it is still fit for consumption. The relationship between the heavy metal content of Cd in Conus with shell length, wet weight, and dry weight are positive with the regression equation successively y = -0.065 + 0.002x, y = 0.054 + 0.005x, and y = 0.061 + 0.014x which shows that the content Heavy metal Cd in Conus is influenced by shell length, wet weight, and dry weight. Perairan pesisir Manokwari merupakan salah satu wilayah pesisir yang mengalami perkembangan kegiatan pembangunan yang sangat pesat dari tahun ke tahun. Kondisi ini memungkinkan adanya masukan limbah seperti logam berat kadmium (Cd) ke perairan Manokwari. Penelitian ini dilakukan di wilayah pesisir Manokwari (Pantai BLK, Pulau Lemon, dan Tanjjung Manggewa) selama tiga bulan (Februari-April 2020). Tujuan dilakukannya penelitian ini untuk mendeskripsikan konsentrasi logam berat kadmium (Cd) pada Gastropoda Conus di Pesisir Manokwari serta mengetahui hubungan kandungan logam berat kadmium (Cd) dalam Conus dengan ukuran cangkang, berat basah, dan berat kering. Analisis data meliputi Spektrofotometer Serapan Atom (SSA), regresi linear, dan analisis deskriptif. Berdasarkan hasil penelitian yang didapatkan, kandungan rata-rata kadmium pada Conus di perairan Manokwari yaitu sebesar 0,06-0,22 mg/kg. Kandungan logam berat dalam Conus masih dibawah ambang yang ditentukan sehingga masih layak untuk dikonsumsi. Hubungan antara kandungan logam berat Cd dalam Conus dengan panjang cangkang, berat basah dan berat kering adalah positif dengan persamaan regresi berturut-turut y = -0,065 + 0,002x, y = 0,054 + 0,005x dan y = 0,061 + 0,014x yang menunjukan bahwa kandungan logam berat Cd dalam Conus dipengaruhi oleh panjang cangkang, berat basah dan berat kering.

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