Jurnal Ilmiah PLATAX最新文献

{"title":"Length and Weight Diversity of Sarden spp landed at TPI Aertembaga Bitung City","authors":"Fransine B. Manginsela, A. V. Lohoo, R. Lasabuda, Yogi Rustandi","doi":"10.35800/jip.v12i1.52863","DOIUrl":"https://doi.org/10.35800/jip.v12i1.52863","url":null,"abstract":"Fish are vertebrates that live all or part of their lives in water, breathe with gills, are equipped with fins for movement and balance, and are cold-blooded (poikilotherm). Lemuru fish are grouped into fish (poikilotherm). Lemuru fish are grouped in the order Cluipeiformes which is part of small pelagic fish. The research was carried out in January-August 2023 to determine the diversity of total length and weight as well as the relationship between the length and weight of male and female lemuru fish, which was carried out using quantitative descriptive methods. Of the 135 lemuru fish individuals observed, there were 40 male individuals with a total length of between 13,184-15,589 cm and 95 female individuals which were longer between 12,083-16,420 cm, and the weight of male individuals between 17,450 - 43,040 grams and female individuals were 19,630 - 52,470 grams. The length-weight regression equation for females is W = 0.018204 L 2.76026 and for males W = 0.01179 L 2.89363..\u0000Keywords: panjang , small pelagic, growth status.\u0000Abstrak\u0000Ikan adalah vertebrata yang seluruh atau sebagian hidupnya di air, bernafas dengan insang, dilengkapi sirip untuk pergerakan dan keseimbangannya serta berdarah dingin (poikilotherm). Ikan lemuru dikelompokkan pada  adalah ikan (poikilotherm). Ikan lemuru dikelompokkan pada ordo Cluipeiformes yang menjadi bagian ikan pelagis kecil. Penelitian dilaksanakan pada bulan Januari-Agustus 2023 bertujuan menentukan keragaman panjang total dan berat serta hubungan panjang berat ikan lemuru jantan dan betina yang pelaksanaannya menggunakan metode deskriptif kuantitatif. Dari 135 individu ikan lemuru yang diamati ada 40 individu jantan dengan panjang total selang 13,184-15,589 cm dan 95 individu betina yang lebih panjang selang 12,083-16,420 cm, dan berat individu jantan selang 17,450 - 43,040 gram dan selang individu betina 19,630 – 52,470 gram. Persamaan regresi panjang-berat betina adalah W = 0.018204 L 2,76026 dan jantan W = 0.01179 L 2,89363.\u0000Kata kunci: panjang, berat, regresi, korelasi, Bitung.","PeriodicalId":508273,"journal":{"name":"Jurnal Ilmiah PLATAX","volume":"236 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140480825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mapping Benthic Habitat Distribution and Coral Reef Health Index in Ternate Island and Tidore Island, North Maluku","authors":"Simon I. Patty, J. Souhoka, P. Makatipu, M. P. Rizqi","doi":"10.35800/jip.v12i1.54054","DOIUrl":"https://doi.org/10.35800/jip.v12i1.54054","url":null,"abstract":"Coral reefs are underwater marine organisms whose coverage can be identified using remote sensing technology utilizing satellite imagery. The benthic habitats classification and coral reef health index analysis were carried out on the Ternate and Tidore islands in June 2021. This study aims to map the distribution of benthic habitat as well as calculate the value of the coral reef health index. The processing of satellite imagery data from Landsat 8, using ENVI 5.3 and ArcGIS 10.1 software. The \"depth invariant index\" algorithm is used in the image sharpening process (Lyzenga, 1981). The maximum likelihood classification technique is used to identify substrate type, with a confusion matrix used to test its accuracy. The coral reef health index assessment is based on the condition of live coral cover, resilience level, and reef fish biomass. The results from water column image classification showed that there were four classes of habitat, i.e. coral, seagrass, sand, and rubble with an overall accuracy value of 85.86% and kappa coefficient of 0.80605. The total area of classified coral reefs is 1152.85 hectares. The coral reef health index values ranged from 2 to 8 with an average of 5, which translates to a moderate percentage of live coral cover, high resilience, and low fish biomass.\u0000Keywords: coral reefs, benthic habitat, health index, Landsat 8 images.\u0000 \u0000Abstrak\u0000Terumbu karang merupakan objek tutupan bawah air laut yang dapat diidentifikasi menggunakan teknologi penginderaan jauh yakni memanfaatkan citra satelit. Klasifikasi habitat bentik dan analisis indeks kesehatan terumbu karang telah dilakukan di pulau Ternate dan pulau Tidore pada bulan Juni 2021. Penelitian ini bertujuan untuk memetakan sebaran habitat bentik serta mengetahui nilai indeks kesehatan terumbu karang. Pengolahan data citra Landsat 8 dengan perangkat lunak ENVI 5.3 dan ArcGIS 10.1. Proses penajaman citra menggunakan algoritma “depth invariant index” (Lyzenga, 1981). Teknik klasifikasi maximum likelihood digunakan untuk identifikasi objek dasar perairan dan uji akurasi menggunakan confusion matrix. Penilaian indeks kesehatan terumbu karang berdasarkan kondisi tutupan karang hidup, tingkat resiliensi dan biomassa ikan karang. Hasil klasifikasi citra kolom air mendapatkan empat kelas habitat yaitu karang, lamun, pasir dan pecahan karang mati (rubble) dengan nilai akurasi keseluruhan sebesar 85,86 % dan koefisien kappa sebesar 0,80605. Total luasan area terumbu karang hasil klasifikasi adalah 1152,85 ha. Nilai indeks kesehatan terumbu karang berkisar antara 2 sampai 8, dengan rata-rata 5 yang menggambarkan persentase tutupan karang hidup sedang, tingkat resiliensi tinggi dan biomassa ikan rendah.\u0000Kata kunci: terumbu karang, habitat bentik, indeks kesehatan, citra Landsat 8.","PeriodicalId":508273,"journal":{"name":"Jurnal Ilmiah PLATAX","volume":"93 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140484751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}