Papers by Emmanuel Manangkalangi
AQUASAINS
Pabean Bay is an estuary waters in which salinity fluctuations occur. This fluctuation requires t... more Pabean Bay is an estuary waters in which salinity fluctuations occur. This fluctuation requires that the fish living in this location have the ability to adapt. This research is a preliminary study that aims to identify the diversity of fish species in these waters. The study was conducted from January to June 2015 with sampling at intervals of one month. Fishing was carried out at three stations, namely the inside which is the estuary of the river, the middle part and the outside of the estuary to get a representative sample. The fishing gear used are sero, and trammel nets. During the study, it was found that 78 species of fish were included in 39 families. The number of species in each sampling varies. Among the fish found were mainly the family Gobiidae (10 species) and the Family Leiognathidae, Lutjanidae, Sciaenidae and Tetraodontidae (four species each). Several fish species were found in the larval, juvenile and adult stages, and these conditions illustrate the importance of...
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Jurnal Perikanan Pantura, Mar 30, 2023
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Samakia, Apr 4, 2019
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Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati
Kerang Gafrarium pectinatum, dengan nama lokal mambekorai, ditemukan pada ekosistem mangrove di p... more Kerang Gafrarium pectinatum, dengan nama lokal mambekorai, ditemukan pada ekosistem mangrove di pesisir Manokwari Selatan, Papua Barat. Sampai saat ini, spesies kerang ini masih dimanfaatkan oleh masyarakat setempat sebagai makanan. Penelitian mengenai populasi kerang G. pectinatum di lokasi ini bertujuan untuk mendeskripsikan pola pertumbuhan dan parameter pertumbuhan yang meliputi panjang asimtotik (Lµ), koefisien pertumbuhan (K), dan perkiraan umur (t0). Sampel kerang dikumpulkan pada tiga zona (bagian bawah, tengah, dan atas) dengan menggunakan metode transek dan kuadrat. Pada setiap sampel kerang dilakukan pengukuran panjang cangkang dan berat total. Sebanyak 194 individu kerang berhasil dikumpulkan. Ukuran panjang cangkang dan berat total secara berturut-turut berkisar di antara 19,6-44,1 mm dan 2,15-30,74 g. Nilai b yang diperoleh sebesar 0,7214 dengan pola pertumbuhan alometrik negatif yang menunjukan bahwa pertambahan panjang cangkang lebih cepat dibandingkan berat totalnya...
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IGKOJEI: Jurnal Pengabdian Masyarakat
Turtles are reptiles that spend most of their lives in marine waters and will return to land to r... more Turtles are reptiles that spend most of their lives in marine waters and will return to land to release their eggs at the location where they were hatched. However, changes in land use that cause damage to coastal habitats, catching turtles on land and taking their eggs as well as the threat of predators can cause a decrease in turtle populations. One effort to overcome this is through hatchling breeding activities as was done in Meinyumfoka Village, Manokwari Regency. The objective of the activity is to support community-based conservation through the provision of supporting facilities and community awareness. This activity begins with a site survey, observation and assistance with needs in the captive area, analysis of material needs and costs, organizational activities, and realization of a work plan. This activity was carried out in November-December 2021 in Meinyumfoka Village. The results achieved were the availability of one hatchling hatchery facility measuring 300 cm x 170 ...
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Igya ser hanjop: Jurnal Pembangunan Berkelanjutan
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Biodiversitas Journal of Biological Diversity
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Journal of Marine Research
Komunitas gastropoda sangat penting sebagai komponen dalam rantai makanan dan dekomposisi di ekos... more Komunitas gastropoda sangat penting sebagai komponen dalam rantai makanan dan dekomposisi di ekosistem mangrove. Penelitian ini bertujuan untuk mendeskripsikan struktur komunitas gastropoda (komposisi spesies, pola sebaran, kepadatan, dan indeks keanekaragaman) pada ekosistem mangrove di Pulau Padaidori, Kepulauan Padaido, Kabupaten Biak Numfor. Ada dua stasiun yang dipilih untuk dilakukan pengambilan sampel. Periode pengambilan sampel gastropoda berlangsung pada bulan Agustus-September 2021 dengan menggunakan metode garis transek dan kuadrat. Pengambilan sampel gastropoda dilakukan ketika kondisi air surut. Berdasarkan hasil penelitian diperoleh sebanyak 12 spesies gastropoda yang termasuk dalam enam famili (Cerithiidae, Ellobiidae, Littorinidae, Muricidae, Neritidae, dan Potamididae). Umumnya spesies ditemukan di substrat dasar dan akar vegetasi mangrove, kecuali Littoraria scabra yang ditemukan juga pada bagian batang dan daun mangrove. Kepadatan yang tinggi ditemukan pada spesie...
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Trends in Sciences
               Ellochelon vaigiensis is a monotypic, catadromous, and widespread species through... more                Ellochelon vaigiensis is a monotypic, catadromous, and widespread species throughout Indo-Pacific region. Taxonomy of the species is ancient and somewhat confused by morphological resemblance. Here, we present and compare the morphological characteristics of E. vaigiensis from 3 distinct areas, respectively from the type locality (Waigeo Island, Raja Ampat), from Cendrawasih Bay (Biak Island), and Kaimana (Venu and Aiduma Islands). All the samples belong to E. vaigiensis following the species diagnosis given by Harrison and Senou (1999). No significant differentiation is found for all meristic and morphological characters between specimens caught from the type locality and Biak Island. Nevertheless, specimens from Kaimana have a slender body width compared to specimens from Waigeo Island (type locality) and Biak Island. Specimens from Kaimana also display a longer head and a larger eye diameter than specimens from Biak Island. A canonical discriminant analysis made ...
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Biodiversitas Journal of Biological Diversity
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Jurnal Sumberdaya Akuatik Indopasifik
Ikan kiper, Scatophagus argus (Linnaeus, 1766) adalah salah satu komponen pada ekosistem estuari ... more Ikan kiper, Scatophagus argus (Linnaeus, 1766) adalah salah satu komponen pada ekosistem estuari yang masih sedikit informasi reproduksinya. Oleh karena itu penelitian ini dilakukan dengan tujuan untuk mendeskripsikan aspek biologi reproduksi jenis ikan ini melalui rasio kelamin, ukuran pertama kali matang kelamin, dan musim pemijahan. Pengumpulan contoh ikan yang berasal dari perairan Teluk Pabean dilakukan setiap bulan di antara Januari dan Desember 2015. Alat tangkap yang digunakan adalah sero dan jaring insang. Sebanyak 431 individu berhasil dikumpulkan yang terdiri atas tahap larva, yuwana, pradewasa, dan dewasa. Perbandingan jumlah individu jantan dan betina relatif seimbang (1,00 : 1,05). Ukuran pertama kali matang kelamin individu jantan pada ukuran panjang total 102,95 mm dan 112,44 mm pada individu betina. Komposisi tingkat kematangan gonad dan nilai indeks kematangan gonad menunjukkan adanya aktivitas reproduksi yang berlangsung sepanjang tahun dan meningkat pada Bulan Ja...
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Jurnal Kelautan Tropis, 2022
Manokwari coastal waters are one of the coastal areas that experience very rapid development of d... more 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. Th...
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Research on the potency of arfak rainbowfish as a biocontrol of mosquito larvae was held in Fishe... more 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 inst...
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The study of food preference of arfak rainbowfish (Melanotaenia arfakensis) in Nimbai and Aimasi ... more 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 ri...
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The study was aimed to describe the spawning season of arfak rainbowfish (Melanotaenia arfakensis... more 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 wa...
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This research aimed to describe habitat condition of endemic arfak rainbowfish, Melanotaenia arfa... more 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...
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Jurnal Sumberdaya Akuatik Indopasifik, 2021
Marine tourism is a type of special interest tourism, namely by managing and utilizing marine and... more Marine tourism is a type of special interest tourism, namely by managing and utilizing marine and coastal landscapes, both those that are managed directly such as swimming, boating, snorkeling, diving, or indirectly such as picnics and beach sports. Nusmapi Island has the potential to be developed as a marine tourism object which has the potential for waters and coral reefs that are in good condition. The purpose of this study was to determine the relationship between the level of public perception and the socio-economic conditions of the local community on Nusmapi Island. In October-November 2020 this research was carried out on Nusmapi Island, Manokwari Regency. The descriptive exploratory method is by conducting a survey to the research location. The data collected were analyzed descriptively by tabulating and displayed in the form of pictures, tables, and graphs to provide an explanation of the information obtained in this study. The relationship between the level of perception ...
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Papers by Emmanuel Manangkalangi