ThesisOpen AccessMetadata saja
2025•
Peningkatan jumlah penduduk dan aktivitas masyarakat di Tanjung Selor menyebabkan peningkatan sampah plastik hingga 94 ton per hari. Sampah plastik yang masuk ke perairan Sungai Kayan mengalami proses degradasi akibat paparan sinar matahari, arus air, perubahan cuaca, dan mikroorganisme, yang kemudian menghasilkan partikel kecil yang dikenal sebagai mikroplastik. Penelitian ini bertujuan untuk mengidentifikasi mikroplastik pada sedimen Sungai Kayan, Kalimantan Utara. Metode yang digunakan adalah deskriptif kuantitatif. Sampel diambil di empat stasiun menggunakan metode purposive sampling dan teknik grab sampling. Lokasi pengambilan sampel meliputi Stasiun 1 (Tanjung Palas), Stasiun 2 (Tugu Cinta Damai), Stasiun 3 (PDAM Sabanar), dan Stasiun 4 (Selimau). Pengambilan dilakukan pada pagi dan sore hari. Parameter yang dianalisis meliputi kelimpahan, bentuk, warna, dan ukuran mikroplastik. Hasil penelitian menunjukkan empat bentuk mikroplastik: fragmen (529 partikel), film (317 partikel), fiber (215 partikel), dan pellet (9 partikel). Warna yang ditemukan mencakup transparan, hitam, coklat, merah, kuning, hijau, biru, dan putih, dengan warna dominan transparan (354 partikel). Ukuran mikroplastik yang paling umum adalah 100–500 µm (291 partikel), sedangkan ukuran 20 µm paling sedikit ditemukan (2 partikel). Lokasi dengan kelimpahan mikroplastik tertinggi adalah Stasiun 3 (PDAM Sabanar) sebesar 3,08 partikel/gram, dan terendah di Stasiun 2 (Tugu Cinta Damai) sebesar 2,03 partikel/gram. Hasil ini menunjukkan adanya pencemaran mikroplastik pada sedimen Sungai Kayan yang berpotensi berdampak terhadap ekosistem perairan.
ThesisOpen AccessMetadata saja
2025•Skripsi, Thesis, Disertasi, dan Tugas Akhir
Mangrove forests are unique coastal ecosystems found in tropical regions such as Indonesia. Gastropods and bivalves, mollusks with or without shells, are commonly found in mangrove ecosystems, living on or within substrates and attaching to mangrove roots. This study aimed to examine the community structure of mollusks in the Mangrove and Proboscis Monkey Conservation Area (MPMCA) in Tarakan. A quantitative descriptive and survey-based method was used. Fieldwork (in situ) was conducted to identify the composition and abundance of mollusks in the conservation zone. The findings revealed the presence of the Mollusca phylum, consisting of two classes, gastropods with 811 individuals (96.20%) and bivalves with 32 individuals (3.80%). Gastropod abundance was dominated by Nerita sp. (44.0%), followed by Bythinia (25.2%) and Telescopium (23.6%). A single species represented bivalves, Gelonia sp. (kapah clam). The Shannon-Wiener diversity index was very low (H0.1618), indicating low diversity, while the dominance index was high for gastropods (D0.0588) and bivalves (D-0.1582), reflecting an imbalanced mollusk community structure. A rise in gastropod numbers from 749 individuals in 2021 to 811 in 2025 suggests improving the mangrove ecosystem quality in the KKMB Tarakan City.
ThesisOpen AccessMetadata saja
2023•Skripsi, Thesis, Disertasi, dan Tugas Akhir
Abstract Fish resources refer to abundant fish and other marine organisme with the inherent capacity for natural replenishment. A diverse range of fish species is captured using fishing gear known as Stownets. This study assessed the fish variety and catch rates in Muara Bulungan and Muara Sesayap, located in North Kalimantan. The investigation was conducted throughout the period spanninf from October to November of the year 2022. The research employed a quantitative descriptive methodology. The sampling procedure was conducted during the alternating periods of high and low tides in seawater. Samples of fish were obtained from the captures of Tugu fishing gear. A total of 30 distinct species were observed, classified into 3 phla, 7 classes, 16 orders, 18 families, and 29 genera. Gazza is the fish species exhibiting with the lowest abundance is scatophagous, comprising a mere 0,01% of the population. The recorded fish catch rates for the Muara Bulungan fishing are as follows: trip 1 yielded an approximate rate of 2,725 kg/h, trip 2 resulted in a rate of 1,089 kg/h, and trip3 exhibited flow rates for trip 1, trip 2, and trip 3 were 1,834 kg/h, 1,375 kg/h, and 2,581 kg/h , respectively.
ThesisOpen AccessMetadata saja
2021•Skripsi, Thesis, Disertasi, dan Tugas Akhir
Mangrove forest is one of the mangrove crab habitats which is used as a spawning and rearing area. The purpose of the study was to analyze the relationship between mangrove density and the abundance of mangrove crabs in the Mangrove and Crab Conservation Area, Pamusian Village, Tarakan City. The sampling method used is purposive sampling method. carried out at 3 (three) station points and each station consists of 3 plots. In each plot, 2 folding traps were installed. The results showed that the highest density of mangrove species was from the mangrove species Rhizophora mucronata, while the lowest density was from the mangrove species Lumnitzera racemosa. The highest abundance of mangrove crabs was at station 3 and the lowest was at station 2. The correlation between mangrove density and mangrove crab (Scylla serrata) was found to have a tree-level correlation with an R2 value of 0.626 (Strong), tiller level with an R2 value of 0.041 (Very weak). and the seedling level with an R2 value of 0.227 (very weak). The effect of mangrove density on mangrove crabs using a simple linear regression test of 0.65 which means that the relationship between mangroves and mangrove crabs is quite strong, namely 65% while 35% is influenced by other factors.
ThesisOpen AccessMetadata saja
2021•Skripsi, Thesis, Disertasi, dan Tugas Akhir
The waters of Tarakan Island have enormous fishery potential, it can be seen from the diversity of fish caught, these waters are one of the fishing areas with monumental fishing gear, one of which is the Amal Beach on Tarakan Island. This study aims to identify the relative abundance of fish species and classify based on the size of the pomfret (Pampus sp.) caught in the Tugu fishing gear in the Amal Coast waters of Tarakan Island. The research was carried out for 2 months from June to July 2021. The total fish caught were 2,932 fish, which were distributed in 3 phyla, 4 classes, 13 orders, 15 families, 17 genera and 18 species. The relative abundance of fish species ranged from 0.14 – 48.06%, the highest abundance of the species Panaeus merguensi 48.06%, Ilisha sp. 15.04% and Argyrosome sp. 11.94%, while the lowest abundance was from Portunus sp. 0.14%, Pseudorhombus sp. 0.31%, and Paraplausia sp. 0.38%. The total length of pomfret (Pampus sp.) caught ranged from 8.2 – 27.13 cm which was dominated by the size of 8.2 – 11.96, the pomfret caught was juvenile or immature fish with a size smaller than 15 ,9 cm.
ThesisOpen AccessMetadata saja
2021•
Penelitian ini bertujuan untuk menganalisis studi kelimpahan dan dominansi ikan di sungai kecamatan sembakung dan potensi implementasinya pada pembelajaran biologi kelas X SMA. Penelitian ini merupakan penelitian deskriptif eksploratif dengan pendekatan kuantitatif dan kualitatif. Sampel penelitian meliputi seluruh jenis spesies dari kelas pisces yang terdapat di Sungai Kecamatan Sembakung. Hasil penelitian menunjukkan bahwa ditemukan 5 spesies yang termasuk ke dalam 5 genus yang berbeda yaitu Hemibagrus planiceps, Kryptoterus cryptoterus, Hemibagrus capitulum, Acanthogobius flavinamus, Puntius javanicus. (1) Kelimpahan tertinggi yang terdapat di Sungai Kecamatan Sembakung adalah jenis Puntius javanicus dengan indeks kelimpahan 48.28%, yang termasuk kategori tinggi sedangkan kelimpahan terendah yaitu Hemibagrus capitulum dengan indeks kelimpahan 3.56%, yang termasuk kategori rendah. (2) Dominansi tertinggi dominansi tertinggi di Sungai Kecamatan Sembakung yaitu spesies Puntius javanicus dengan indeks dmoninansi sebesar 0,23 sedangkan dominansi terendah yaitu Hemigabrus capitulum dengan indeks dominansi sebesar 0,00 yang masing-masing berkategori rendah. (3) Hasil penelitian yang telah dilakukan berpotensi untuk dijadikan sebagai sumber belajar pada pembelajaran biologi kelas X SMA pada materi Kingdom Animalia, submateri Kelas Pisces. This research investigates the abundance and dominance of fish in the Sembakung sub-district river and its potential implementation in biology class X SMA. The research is exploratory, descriptive research with quantitative and qualitative approaches. The research sample comprises all types of species from the Pisces class found in the Sembakung District River. The results showed that five species belonged to 5 different genera: Hemibagrus Planiceps, Kryptoterus Cryptoterus, Hemibagrus Capitulum, and Acanthogobius Flavinamus, Puntius javanicus. (1) The highest abundance found in the Sembakung District River is the Puntius javanicus species, with an abundance index of 48.28%, which is included in the high category, which is included in the high category. The lowest abundance is the Hemibagrus capitulum, with an abundance index of 3.56%, included in the low category. (2) The highest dominance in Sungai Sembakung District is Puntius javanicus species with a dominance index of 0.23, while the lowest dominance is Hemigabrus capitulum with a dominance index of 0.00, each of which is in the low category. (3) The results of the research that have been carried out can be used as learning resources in biology learning for class X SMA in Kingdom Animalia, sub-material for Class Pisces.
ThesisOpen AccessMetadata saja
2020•
this study aimed to find out morphology and abundance of mudskipper on Sebatik Island and the potential for its implementation as learning materials in biology learning. Bsed on the morphology, mudskipper had 5 differentiating characters from 23 morphometric characters. For the relative abudance, the species that was classified as high was the Periophthalmus chrysospilos Bleeker (80,64%), the moderate abudance was found in the species of Boleophthalmus boddarti Pallas (16,12%), and the lowest abundance was found in the species of Periphthalmodon schlosseri Pallas (3,22%). These was a link between research in biology learning, namely vertebrate material for class X SMA and basic competence 3.8, applying the classification principle to classify animals into phyla based on life. The results of this identification were poured into teaching materials in the form of lesson plans, practical, guides, student worksheets and handouts.
