INTEGRATED OF FISHERIES SCIENCE adalah Jurnal Perikanan yang memuat artikel-artikel ilmiah yang merupakan hasil penelitian yang telah ditelaah dengan baik oleh para editor di bidangnya. Berdasarkan hasil kajian sesuai bidang perikanan meliputi aspek perikanan tangkap, pengelolaan wilayah pesisir, pengolahan hasil perikanan, budidaya, konservasi, dan bidang ilmu lainnya yang berkaitan. Jurnal ini diharapkan dapat menyalur gagasan dari setiap peneliti dan sebagai sumber referensi bagi mahasiswa dosen dan masyarakat.
Lembaga Penelitian dan Pengabdian, Universitas Kristen Papua
Fish Community Structure and Response to Anthropogenic Pressure in the Mangrove Ecosystem of Kladufu Village, East Sorong District
The mangrove ecosystem in Kladufu Village, East Sorong District, faces escalating pressure from land conversion and settlement expansion, which threatens to alter estuarine fish community structures. This study evaluated species composition, abundance, and community responses to environmental gradients and anthropogenic stressors in the area. Field sampling was conducted over four weeks using gill nets (1-, 2-, and 3-inch mesh sizes) across two stations representing relatively intact and fragmented mangrove habitats. Concurrent physicochemical measurements were recorded. Ten fish species were documented, primarily belonging to Leiognathidae and Mugilidae. Abundance patterns exhibited a pronounced spatial shift: Station I (salinity 30‰) was dominated by Mugil cephalus (35.9%), while Station II (salinity 20‰, adjacent to residential areas) showed absolute dominance by Aurigequala fasciata (51.5%). Diversity and evenness indices ranged from moderate to low, accompanied by elevated dominance values at the impacted site, indicating community simplification driven by habitat degradation and domestic effluent inputs. Salinity gradients and mangrove conversion emerged as the principal drivers of species distribution. These findings highlight the urgent need for targeted mangrove rehabilitation and ecosystem-based fisheries management to maintain the area’s ecological function as a nursery ground and sustain local coastal fisheries.
Copyright (c) 2026 INTEGRATED OF FISHERIES SCIENCE
Length-Weight Relationship and Negative Allometric Pattern of Male Mackerel (Rastrelliger kanagurta) at Sorong Fish Landing Site, Southwest Papua
Rastrelliger kanagurta is a small pelagic fish commodity with high economic value and is vulnerable to overfishing. This study aimed to analyze the length-weight relationship as an indicator of growth pattern of Indian mackerel landed at the Fish Landing Site (TPI) of Sorong City, West Papua. Sampling was conducted purposively from April to June. A total of 191 fish were measured for total length (mm) and body weight (g). The length-weight relationship was analyzed using logarithmic linear regression, followed by a t-test to determine the growth pattern (isometric or allometric). The results showed that the caught fish were dominated by the length class of 185.5–200.5 mm (31.9%) and weight class of 71.5–86.5 g (28.3%). The combined regression coefficient b (April–June) was 2.2498, with a calculated t-value (1.6125) < t-table (1.9725) at 95% confidence level, indicating a negative allometric growth pattern. This means that length gain is faster than weight gain, suggesting relatively slender body condition, presumably due to fishing pressure or food limitation. These findings confirm that the population of Indian mackerel in Sorong waters has experienced a shift in growth pattern, necessitating adaptive management measures such as mesh size regulation and enhanced monitoring of fishing grounds
Effectiveness of Hand Line and Kite Line Fishing Gear in Tuna (Thunnus sp.) Fisheries in Makbon Waters, Sorong Regency
Large pelagic tuna (Thunnus sp.) is a high-value fishery resource that significantly contributes to Indonesia’s fishing industry. This study evaluates the effectiveness of two primary fishing gear types—hand line and kite line—in tuna fisheries in Makbon waters, Sorong Regency, West Papua. Field research was conducted using a survey approach with direct observations on 14 fishing trips. Results demonstrated that hand line yielded 52 tuna individuals (65.8% effectiveness), while kite line yielded 27 individuals (34.2% effectiveness). This difference is significant and influenced by technical factors including operational depth, gear selectivity, and target fish behavior. Hand line effectively reaches optimal tuna depths and exhibits higher selectivity for catching marketable-sized individuals. This research emphasizes the importance of appropriate gear selection in enhancing catch productivity while maintaining tuna resource sustainability. Policy recommendations include regulating hand line use as the primary fishing gear and implementing monitoring systems to ensure the capture of adult fish
Community Dependence and Participation in Mangrove Management: A Case Study in Kladufu Village, Km 10, East Sorong
Mangrove forests on the coast of West Papua hold high ecological and economic values, yet utilization pressure continues to increase. This study aimed to analyze the impacts of mangrove utilization activities on ecosystem conditions and on the socio-economy of the community in Kladufu Village Km 10, East Sorong District, Sorong City. The research was conducted with using a descriptive survey method with semi-structured interviews of 31 purposively selected respondents. Data were analyzed descriptively (quantitative and qualitative). Results showed that most respondents were male (58.1%); of productive age, with low education levels (elementary school 38.7%, junior high school 35.5%); and worked as housewives, stone collectors, mangrove loggers, or fishermen. As many as 67.7% of respondents very frequently utilized mangroves, mainly for firewood and construction materials. Logging frequency was very high (61.3%). Nevertheless, 41.9% of respondents perceived mangrove conditions as better than three years earlier due to replanting activities. Community participation in management was mostly voluntary (71.0%) and motivated by confidence in local knowledge (80.6%). A total of 83.9% desired involvement from the planning stage through to benefit sharing. The utilization impacts on the ecosystem were twofold: improvement in rehabilitated areas versus degradation elsewhere. Impacts on the community were reflected in high economic dependence, alongside strong ecological awareness and social capital. Capacity building and livelihood diversification are needed to achieve mangrove sustainability.
Diversity of Seagrass Types and Conditions in the Waters of Suprau, Maladum Mes District
Seagrass beds are one of the ecosystems located in coastal areas or shallow marine waters. The uniqueness of seagrasses compared to other marine plants lies in their extensive root system and rhizome network. This type of rooting system causes seagrass leaves to become dense, which greatly benefits the productivity of the seagrass bed ecosystem. This study aimed to determine the species diversity and condition of seagrass beds on Suprau Beach, Maladum Mes District. Three seagrass species were found on Suprau Beach: Halodule pinifolia, Halodule uninervis, and Cymodocea serrulata, with relative cover percentages of 50%, 33.3%, and 16.7%, respectively. Based on the analysis of seagrass bed conditions in Suprau Waters, the ecosystem was classified as damaged or poor/unhealthy and impoverished according to the Indonesian Minister of Environment Decree No. 51 of 2004.
Condition of Live Stone Coral Cover on Suprau Beach, Maladoom Mes District, Sorong City
Coral reefs are tropical marine ecosystems that are very important for the sustainability of fishery resources and coastal protection. This study aims to evaluate the condition of live stony coral cover at Suprau Beach, Maladoom Mes District, Sorong City using the Point Intercept Transect (PIT) method. Observations were conducted at three stations at a depth of 3-5 meters. The results showed that the average live coral cover was 45.33%, which is classified as moderate. Specifically, Station I had excellent coral cover (80%) dominated by Non-Acropora corals of the Coral Branching type from the Porites family; Station II showed moderate conditions (34%) with a dominance of Non-Acropora corals of various life forms; and Station III was in a damaged condition (20%) with high coverage of dead corals covered with algae (52%) and sand (24%). Water quality conditions at all three stations still support coral growth, with parameters such as temperature (29-32°C), salinity (31-35 ppt), pH (7.5 ppt), and water clarity (4-8.5 m) within the optimal range. High sedimentation at Stations II and III is the main factor limiting coral growth, caused by community activities such as beach reclamation, pier construction, and hill excavation around the waters. This study provides basic information for the development of strategies for the rehabilitation and management of coral reef ecosystems in Sorong City.
The Impact of the Moratorium Policy on Fishery Companies (PT) in Sorong City
This study aims to determine the impact of the moratorium on the operation of (PT) fishery in Sorong and for export activities of fisheries, especially commodities demersal fish and shrimp. The moratorium imposed on large ships over 30 GT, ship construction abroad, boats that use trawling gear and replace the court transhipment at sea. This research conducted in the area of Sorong by selecting the relevant agencies are performed in the unit supervisor PSDKP Sorong, Syahbandar fisheries, and fishing companies to conduct interviews and collect data relating to the object of research that matters concerning the company's operations and activities of fishery product exports. Of the results of research conducted, the impact of the moratorium on the operation of (PT) fishery is the discontinuation of the company's operations in Sorong area, the export of fishery products stalled, stalled enlargement levy export fishery products to the local government, the termination of employment of the crew, activities loading and unloading in the fishing port decreases. The impact of the moratorium is not profitable for the company (PT) fishery, income levies, the livelihood of the crew and the fishing port of Sorong city workers.
Identifikasi Timbulan Sampah Non-Organik Di Pulau Soop Distrik Sorong Kepulauan, Kota Sorong, Papua Barat Daya
Indonesia is said to be one of the countries contributing to plastic waste in the world. Therefore, the Government through the Ministry of Maritime Affairs and Fisheries has launched a priority program for handling plastic waste in the sea as an effort to reduce plastic waste. One form of support in handling plastic waste is to identify the potential for research-based waste generation in coastal areas and small islands. This research was conducted on Soop Island, Sorong Islands District, Sorong City, Southwest Papua from October to November 2024 with the aim of analyzing and identifying non-organic waste by knowing the amount, weight, and density of waste. This research method uses qualitative and quantitative. Qualitative research methods include observation, visual analysis, literature studies, and interviews. For quantitative methods calculating the amount of waste based on type per unit area. From the results of the study, it is known that the non-organic waste identified on Soop Island consists of plastic, plastic foam/styrofoam, glass and ceramics, metal, paper and cardboard, rubber, and other materials. The type of plastic waste dominates the most with a density of 8.33 pcs/m2 with a waste weight reaching 238.75 gr/m2. Meanwhile, the lowest waste density is in the paper and cardboard waste type with a density of 0.03 pcs/m2 with a weight of 2.38 gr/m2.
Lumut Sutra (Chaetomorpha sp.) Sebagai Pakan Alternatif Untuk Pertumbuhan dan Kelangsungan Hidup Ikan Nila (Oreochromis niloticus) Di Distrik Ayamaru Utara Kabupaten Maybrat
Yubiah Village is a village located in North Ayamaru District, Maybrat Regency, West Papua Province. The community of Yubiah Village is largely engaged in freshwater fish farming, and one of the main cultured species is Nile tilapia. This fish is chosen not only because it is easy to cultivate but also because it has good marketability. Freshwater sources in Yubiah Village are abundant, making freshwater aquaculture easy to carry out. The purpose of this study was to determine the effect of silk algae (Chaetomorpha sp.) as an alternative feed on the growth and survival of Nile tilapia. The research was conducted from October to November 2022 in Yubiah Village, North Ayamaru District, Maybrat Regency, West Papua Province. This study used a Completely Randomized Design (CRD) consisting of three treatments and one control. The results of the study led to the following conclusions: The measurement of absolute weight gain of Nile tilapia showed that the best growth occurred in Treatment C with 80 grams of silk algae as an alternative feed, followed by Treatment B with 60 grams, and Treatment A with 75 grams, while the lowest growth was obtained in Treatment D (without silk algae). The highest survival rate of Nile tilapia was found in Treatment C (28 grams), where fish were given a higher amount of silk algae three times a week. This was followed by the other treatments.
ANALISIS KESESUAIAN EKOWISATA MANCING DAN BERENANG DI BENDUNGAN SEMTU DISTRIK AYAMARU TENGAH KABUPATEN MAYBRAT
Indonesia memiliki lebih dari 500 danau dengan luas keseluruhan lebih dari 5.000km atau sekitar 0,25% dari luasan daratan Indonesia. Salah satu dari 500 danau tersebut yaitu Danau Ayamaru yang sudah di buat menjadi Bendungan Semtu yang terletak di Kabupaten Maybrat, Provinsi Papua Barat dan menjadi aset masyarakat dan sumberdaya alam serta berpendapat bagi nelayan, pencegahan banjir dan objek wisata. Untuk mengetahui potensi dan permasalahan di Kawasan wisata Bendungan Semtu, Distrik Ayamaru Tengah, Kabupaten Maybrat. Untuk mengetahui kesesuaian Kawasan wisata Bendungan Semtu, Distrik Ayamru Tengah, Kabupaten Maybrat. Penelitian dilaksanakan pada bulan November–Desember 2021. Penelitian di laksanakan di Bendungan Semtu, Distrik Ayamaru Tengah Kabupaten Maybrat. Penelitian di bagi menjadi 2 stasiun stasiun 1 di bagian utara Bendungan Semtu dan stasiun 2 di bagian selatan Bendungan Semtu sehinga ke 2 stasiun ini digunakan sebagai tempat penelitian. Kegiatan wisata yang akan dikembangkan hendak di sesuaikan dengan potensi sumberdaya dan peruntukannya. Setiap kegiatan wisata mempunyai persyaratan sumberdaya dan lingkungan yang sesuai objek wisata yang akan dikembangkan berdasarkan tabel kesesuaian untuk berkemah, mancing dan berenang. Berdasarakan perhitungan kesesuaian ekowisata danau kategori berenang pada stasiun 1 dan 2 di Bendungan Semtu di ketahui masuk dalam nilai sangat sesuai dengan persentase sebesar 83,33%. Sedangkan perhitungan kesesuaian untuk ekowisata mancing di peroleh perbedaan nilai pada ke 2 stasiun yaitu pada stasiun 1 memiliki persentase 60% dan stasiun 2 53,3% berdasarkan data ini dapat di ketahui bahwa peruntukan ekowisata mancing di Bendungan Semtu berada dalam kategori sesuai.
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Structure of Mangrove Community in Klaurung District, Klablim Village, Sorong City
As a typical ecosystem for coastal areas, mangrove ecosystems have many functions and benefits in supporting the sustainability of other ecosystems involved in it. Mangrove forests play an important role in stabilizing coastlines and helping to reduce the impact of natural disasters such as tsunamis and hurricanes. This study aims to determine the extent of mangrove cover in Klablim Vilage, Klaurung District. The method used in this research is line transect, which is carried out by making a perpendicular line to the land by making maps or plots. One of the advantages of using this method is that it is more efficient. This method is faster, requires less equipment, and requires fewer observers. The results of this study found the diversity of mangrove species in Klablim Village, Klaurung District, consisting of Rhizophora sp, Xylocarpus sp, Bruguier asp and Soneratia sp. The relative frequency of mangroves found in Klablim Village, Klaurung District, is Rhizophora sp 62.5%, Xylocarpus sp 12.5%, Bruguiera sp 12.5% ​​as well as Soneratia sp 12.5%. The relative density of mangroves found in Klablim Village, Klaurung District, for the species Rhizophora sp 68%, Xylocarpus sp 16%, Bruguierasp 8% and Soneratia sp 8%. The relative cover for Rhizophora sp species was 92.3%, Xylocarpus sp 5.11% species, Bruguiera sp 1.27% and Soneratia sp 1.27%.
Copyright (c) 2024 INTEGRATED OF FISHERIES SCIENCE
Comparative Analysis Of Cakalang (Katsuwonus Pelamis) Catch Results Before And During The Covid-19 Pandemic In Sorong District
Pole and line in the waters of Sorong have contributed significantly to the level of fishery production in West Papua. Based on data from the related service, the production of catches is quite large and there is an increase from year to year. Catching fish using pole and line fishing gear by looking for schools of surface fish that cluster in large enough numbers. The purpose of this study was to determine the comparison of catches before and during the covid 19 pandemic to the catches of Pole and Line vessels at PT. Radios Apirja Sorong and to find out the impact of Pole and Line crew income before and during the covid-19 pandemic The average catch of pole and line vessels at PT. Radios Apirja Sorong before the COVID-19 pandemic (2019) was 77.57 tons per month while the average catch during COVID-19 (2020) was 69.78 tons per month, so the average pole and line boat catch before COVID -19 can be said to be still good, but during the COVID-19 pandemic the average catch decreased (minus) by 7.79 tons per month.
Study of Percentage of Coral Cover Using Manta Tow Method in Matan Island Waters, Raja Ampat Regency
The waters of Matan Island are one of the waters found in Raja Ampat Regency, this water area has very diverse water resources, one of which is coral reef ecosystems. This study aims to determine the percentage of coral reef cover and coral reef conditions using the Manta Tow method. During the observations, it was found that the percentage of coral reef cover along 10 observation points with an average coral cover percentage of 29%, for dead corals with a cover percentage of 16%, coral fractures 23%, 19% sand and other biota 13%. Conditions along the observation trajectory are dominated by coral reefs and coral fractures. The distribution of coral fractures on Matan Island was caused by explosives used by local fishermen which caused damage to coral reefs.
Copyright (c) 2023 INTEGRATED OF FISHERIES SCIENCE
Identifying Types Of Household Waste And Countermeasure In Saoka Village Sorong City, West Papua
The research Objective was to identify the types of households that exist in the Saoka sub-district in Maladum mes district at 4 RT and countermeasures. The method used is descriptive method, what is meant by qualitative here is looking for meaning, understanding, and understanding of a phenomenon, events, as well as human life by being directly and/or indirectly involved in a researched, contextual, and comprehensive setting. Based on the results of research conducted in sud-district Saoka at 4 RT, garbage the most are types of inorganic waste, plastic waste, bottle waste, and garbage. The way to handle waste that is done is by: (1) recycling and (2) burning.
Whale Shark (Rhincodon typus) conservation as eco-tourism in the Kwatisore Village area, Yaur District, Nabire Regency, Papua Province
Whale shark (Rhincodon typus) conservation as ecotourism in the kwatisore Village area, Yaur District, Nabire Regency, Papua Province was carried out with the aim of knowing the types of Whale Shark (Rhincodon typus) conservation activities and the ecotourism potential of Kwatisore Village, Yaur District, Nabire Regency. From the results of research in Kwatisore Village, Yaur District, using the observation method and interview method, the results obtained were whale shark conservation activities, the potential for eco-tourism in Kwatisore village, and whale shark conservation involving various parties, the Cendrawasih Bay National Park Center, WWF-Indonesia. Conservation International, The Nature conservancy, Fisheries and maritime Service, Tourism, Youth Culture and Sports Office of Nabire Regency, conservation cadres and the people of Kwatisore village.
The Effect of Different Types of Bait on Catches in Huhate (Pole and Line) in the Southern Misool Waters of The Raja Ampat Islands
The operation of the pole and line fishing gear is very dependent on the availability of live bait and also some fishing aids used to support the operation of the fishing gear. Pole and line is a type of fishing gear consisting of a fishing rod, fishing line and non-linking hooks. The purpose of this study was to determine the type of bait that has the most influence on pole and line catches. The research was conducted in March-April 2020 in South Misol, Raja Ampat Regency. The method used is coefisien method. The results showed that the different types of white castle bait and black castle bait in this study affect the number of catches. This can be seen in the catch of the white castle bait 65% and the black castle bait 35%. The results showed that using pole and line fishing gear with white castle live bait is better used.
Study On The Utilization Of Wharf In Supporting Loading And Unloading Activities And Mooring For Fishing Boats At Fish Landing Base (PPI) Klaligi, Sorong City
The purpose of this research is to be able to describe the condition of the PPI Klaligi pier in Sorong City, to determine the level of stakeholder satisfaction in utilizing the PPI pier. The method used in street vendors is quantitative descriptive, namely through direct observation/observation, interviews, filling out questionnaires and literature study. Based on the research results, the condition of the PPI wharf is currently in good condition, the level of stakeholder satisfaction with jetty dock services and facilities is as follows: Loading and unloading: 73% of stakeholders are satisfied with the level of loading and unloading services at PPI Klaligi wharf. Mooring: 80% of stakeholders are satisfied with the level of mooring service at PPI. Physical condition: 73% of stakeholders are quite satisfied with the physical condition of the PPI pier. Capacity: 80% of stakeholders are dissatisfied with the capacity and size of the PPI Klaligi pier.
Struktur komunitas bivalvia pada ekosistem mangrove di Kelurahan Kladufu Distrik Sorong Timur
Penelitian ini dilakukan untuk mengetahui komposisi jenis, kepadatan dan indeks bivalvia. Penelitian dilakukan di daerah mangrove Kelurahan Kladufu Distrik Sorong Timur. Dengan jumlah stasiun pengamatan III yaitu, pada daerah mangrove dekat pemukiman warga, daerah mangrove samping muara sungai dan daerah mangrove ujung pantai muara sungai. Metode penelitian yang digunakan yaitu metode transek garis dan transek kuadrat kemudian di analisis. Hasil yang didapat adalah 6 jenis bivalvia, yaitu Polymesoda erosa yang terdapat pada stasiun I (15), II (23) dan III (1), Saccrostrea echinata yang terdapat pada stasiun II (50), Anadara granosa yang terdapat pada stasiun III (42), spesies yang belum dketahui terdapat pada stasiun III (3), Saccostrea cucullata yang terdapat pada stasiun III (30) dan Pilsbryoconcha exilis yang hanya terdapat pada stasiun II (1). Nilai kepadatan yang paling tinggi yaitu berjenis Saccostrea echinata dengan kepadatan mutlak 3,33 dan kepadatan relatif 67,56. Indeks keanekaragaman komunitas bivalvia berkisar antara 0–0, 52. Kisaran nilai tersebut menggambarkan bahwa komunitas bivalvia di kategorikan rendah. Indeks keseragaman yang di peroleh yaitu 0–0,51. Hal ini di kategorikan rendah. Indeks dominasi berkisar antara 0,0001–1. Kesimpulan yang di dapat yaitu, telah ditemukan 6 jenis bivalvia. Dari setiap jenis yang ditemukan, diperoleh kepadatan tertinggi pada jenis Saccostrea echinata. Keanekaragaman komunitas bivalvia berada dalam kondisi tidak stabil (parameter lingkungan dan substrat kurang mendukung). Indeks keseragaman yang di peroleh rendah artinya jenis bivalvia yang ditemukan pada tiap stasiun relatif seragam (variasi jenis yang ditemukan sangat rendah). Nilai dominasi mendekati 1 (C <0.5), mengindikasikan bahwa terdapat organisme tertentu yang mendominasi seperti Polymesoda erosa pada stasiun I saccostrea echinta pada stasiun II dan Anadara granosa pada stasiun III.
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Pengaruh Perbedaan Salinitas Terhadap Pertumbuhan Benih Ikan Nila (Oreochromis niloticus)
Nila dapat hidup di air tawar, air payau dan air laut dengan kadar garam antara 0-35 ppt. Ikan nila Oreochromis niloticus air tawar dapat dipindah ke air asin dengan proses adaptasi bertahap, yaitu dengan menaikkan kadar garam sedikit demi sedikit dan juga dapat langsung di pelihara pada air bersalinitas. Pada Penelitian ini dilakukan tanpa proses adaptasi terlebih dahulu. Untuk meningkatkan produksi budidaya khususnya ikan nila Oreochromis niloticus, dapat dilakukan dengan cara mengetahui media pemeliharaan yang optimal bagi pertumbuhan ikan tersebut. Tujuan dari penelitian ini adalah untuk mengkaji pengaruh salinitas berbeda terhadap pertumbuhan benih ikan Nila Oreochromis niloticus serta mengetahui salinitas terbaik dalam media pemeliharaan benih ikan nila Oreochromis niloticus. Penelitian dilaksanakan pada bulan Juni - Agustus tahun 2016, bertempat di Kampus Politeknik KP Sorong. Ikan uji yang digunakan adalah benih ikan nila Oreochromis niloticus berukuran 4 cm dan berat 0,51 gram. Metode yang digunakan adalah Rancangan Acak Lengkap (RAL) dengan 5 perlakuan. Selanjutnya menggunakan Analysis of Variance (ANOVA) dengan taraf kepercayaan 95% (F < 0,05) yang kemudian di lanjutkan dengan uji lanjut Duncan. Hasil yang diperoleh menunjukkan bahwa pada perlakuan 20 ‰ menunjukkan pengaruh yang berbeda nyata, tetapi dari tingkat rata-rata setiap perlakuan, pertumbuhan panjang mutlak yang tertinggi pada perlakuan B ( 5‰) sebesar 0,95 cm, dan di susul perlakuan C sebesar 0,88 cm, dan di ikuti perlakuan A (kontrol) sebesar 0,83 cm, perlakuan D (15‰) sebesar 0,80 cm dan yang terendah pada perlakuan E (20‰) sebesar 0,53 cm. Untuk pertumbuhan berat mutlak tertinggi pada perlakuan C (10‰) sebesar 1,52 gram, dan di susul perlakuan A (10‰) sebesar 1,33 gram, dan di ikuti perlakuan B (5‰) sebesar 1,26 gram, perlakuan D (15‰) sebesar 1,02 gram dan yang terendah perlakuan E (20‰) sebesar 0,37 gram. Tingkat kelangsungan hidup benih ikan nila terbaik pada perlakuan A (Kontrol) 86,67%,kemudian perlakuan B (5‰) yakni sebesar 76,67%, dan di susul perlakuan C (10‰) sebesar 73,33%, perlakuan D (15‰) sebesar 70,00 % dan terendah pada perlakuan E (20‰) sebesar 36,67%. Ikan nila dapat hidup pada kisaran suhu antara 27 – 30 dan pH air media antara 6,8 - 7,9 ppm.
Identifikasi Dan Prevalensi Serangan Ektoparasit Ikan Mas (Cyprinus Carpio L.) Pada Area Pembudidaya Ikan Di Kabupaten Sorong
Pemeriksaan parasit yang dilakukan selama penelitian di laboratorium Penguji Stasiun Karantina Ikan Pengendali Mutu Kelas II Sorong, sampel ikan diambil dari petani tambak dari beberapa Kampung/Desa di Kabupaten Sorong, tujuan dari penelitian ini adalah untuk mengetahui jenis -jenis ektoparasit yang menyerang ikan mas (Cyprinus carpio L). Metode yang digunakan adalah metode survei melalui pengambilan sampel dikolam secara langsung untuk mengidentifikasi parasit pada ikan mas, data yang dikumpulkan meliputi data primer dan data sekunder. Data primer diperoleh langsung dari hasil pemeriksaan parasit yang dilakukan. Data sekunder diperoleh dari instansi terkait yang berhubungan dengan data yang diperlukan serta ditambahkan dengan literatur yang mendukung kelengkapan dan kejelasan mengenai data yang didapatkan tersebut. Parasit yang ditemukan dari 30 ekor ikan mas (Cyprinus carpio L) ada empat jenis yang terdiri dari golongan cacing monogenea ada 2 jenis parasit yaitu Gyrodactylus sp dan Dactylogyrus sp jenis protozoa ada Tricodina sp, jenis crustacea ada parasit Lernea sp, dari empat jenis parasit tersebut parasit yang paling banyak menyerang pada ikan mas adalah jenis Dactylogyrus sp dan Gyrodactylus sp . Nilai prevalensi tertinggi untuk Dactylogyrus sp terdapat pada pembudidaya ikan di Kampung Malaos dengan nilai 90% untuk Kampung Klagana dan Kampung Makotyamsa nilai masing-masing 70 %, sedangkan Dactylogyrus sp nilai Prevalensi tertinggi 70% berada di Kampung Makotyamsa. Untuk nilai Intensitas tertinggi terdapat pada parasit Gyrodactylus sp di Kampung Klagana dengan nilai Intensitas 3.8 dan Gyrodactylus sp nilai Intensitas 3.33 berada pada Kampung Malaos.
Analisis Karakter Morfologi dan Morfoanatomi (gonad) Ikan Rainbow Sorong Melanotaenia fredericki Berdasarkan Tekanan Ekologi Habitat Sungai Hutan
Melanotaenia Fredericki (Fowler, 1939) Subordo Melanotaeniodei, Ordo Arheriniformes adalah jenis ikan air tawar, tergolong ikan hias yang memiliki sebaran di daerah Sorong dan sekitarnya. Penelitian ini bertujuan untuk menganalisis karakter morfologi dan karakte rmorfoanatomi (gonad) Ikan Rainbow Sorong (Melanotaenia fredericki) asal Sungai Hutan Lindungdan Sungai Malasaum. Metode yang digunakan yaitu observasi lapangan dan analisis laboratorium dengan menggunakan Statistika V.8 Scater Flots dan Statistika Uji T Komparatif. Berdasarkan hasil dapat disimpulkan bahwa analisis morfologi menunjukkan adanya 5 (lima) karakter yang saling tumpang tindih antara populasi asal Sungai Hutan Lindung dan populasi asal Sungai Malasaum (tidak ada perbedaan mencolok). Populasi pada Sungai Hutan Lindung mencirikan karakter batang ekor lebih tinggi dan karakter gonad lebih kecil. Sebaliknya populasi pada Sungai Malasaum mencirikan karakter batang ekor lebih pendek dan karakter gonad lebih besar.
Struktur Komunitas Gastropoda Pada Ekosistem Mangrove Di Kelurahan Klamana Distrik Sorong Timur Kota Sorong
Ekosistem mangrove merupakan ekosistem pesisir yang memiliki produktifitas, nilai ekonomis, dan nilai ekologis tinggi. Gastropoda merupakan salah satu spesies dari filum Moluska yang paling banyak dijumpai pada ekosistem mangrove dan keberadaanya sangat dipengaruhi faktor – faktor lingkungan (biotik dan abiotik). Penelitian bertujuan untuk mengetahui jenis dan jumlah Gastropoda yang ada pada ekosistem mangrove di Kelurahan Klamana. Parameter air yang diukur meliputi suhu, salinitas, pH tanah, DO (Dissolved Oxygen), pH air dan tipe sendimen. Tenik pengambilan sampel (sampling) menggunakan metode linetransek kuadran Hasil penelitian menunjukan di ekosistem mangrove Kelurahan Klamana ditemukan 9 spesies dari 4 family Gastropoda dan Terebralia sulcata (family Potamididae) yang paling banyak ditemukan dengan 81 individu, serta substrat yang ada pada lokasi pengambilan data yaitu lumpur dan lumpur berkerikil.Analisa struktur yang diukur yaitu Indeks Keanekaragaman ( ),Indek keseragaman (E), Indeks Dominasi (D) dan kepadatan.