Aqusains: Jurnal Ilmu Perikanan dan Sumberdaya Perairan

Pendugaan stok ikan tenggiri (Scomberomorus commerson) yang didaratkan di pelabuhan perikanan provinsi kalimantan barat

Dwiro Yoel

This study aims to estimate the stock of Narrow-barred Spanish Mackerel (Scomberomorus commerson) landed at the Fisheries Port of West Kalimantan Province. We used secondary data at 2015 to 2024 for gillnet fishing fleet. The collected data were Catches and fishing trips. We used the Catch Per Unit Effort (CPUE), the Schaefer Surplus Production Model, and Exploitation Rate Analysis. The result showed a CPUE values fluctuated between 432 and 729 kg/trip, with the highest recorded at 2022 and the lowest at 2023. The Maximum Sustainable Yield (MSY) in 1,335,956 Kg per year. The exploitation rate during the observation period was below 80% of the MSY value, classifying in Underfishing Level. These findings indicate that the stock of S. commerson in West Kalimantan Waters remains relatively healthy and not optimally utilized yet.

ANALISIS ANTIBAKTERI MENGGUNAKAN METODE CAKRAM DAN UJI TOKSISITAS BSLT (Brine Shrimp Lethality Test) DARI EKSTRAK JAMUR SIMBION SPONS

David Febriansyah David

Bacterial resistance to antibiotics has increased the demand for new antibacterial agents from natural sources, including marine organisms. This study evaluated the antibacterial activity and toxicity of sponge-associated fungal extracts. Antibacterial activity against Escherichia coli was tested using the disc diffusion method, while toxicity was assessed using the Brine Shrimp Lethality Test (BSLT). The extract was obtained by maceration with 95% methanol and tested at various concentrations. The extract showed antibacterial activity, with the largest inhibition zones at 100 and 1,000 ppm after 24 hours, which decreased after 48 hours. BSLT results showed 100% mortality of Artemia salina larvae at concentrations ≥100 ppm. The main BSLT test revealed a dose–response relationship, with higher doses and longer exposure reducing larval survival. These results indicate that sponge-associated fungal extracts are promising antibacterial agents, although their toxicity requires further evaluation.

Dampak Tumpahan Minyak Teluk Balikpapan Terhadap Ekosistem Pesisir dan Laut (Kajian Literatur)

Zidan Fachriza

Indonesia is an archipelagic country with a vast ocean territory and a strategic position for shipping activities. In addition to its strategic shipping lanes, Indonesia also has natural resources in the form of petroleum, one of which is located in Balikpapan. Ship traffic in the area has the potential to cause oil spills into the sea. Oil spills can be caused by several things, such as tanker accidents, pipe leaks, oil spills during transport to ships, and ship fires. On March 31, 2018, an oil spill occurred in Balikpapan Bay, resulting in marine pollution. Disruption of environmental functions is one of the impacts of this pollution. the purpose of this paper is to further examine the damage to ecosystems caused by oil spills in the sea and coastal areas of Balikpapan Bay. Based on the results obtained, there are several discussions, namely regarding the causes of oil spills, the impact on the marine ecosystem, the impact on the social and economic aspects of the community, and efforts to mitigate and recover from the oil spill in Balikpapan Bay.

a Pemanfaatan Lingkungan Sekitar Sekolah sebagai Sumber Belajar dalam Mengenalkan Keanekaragaman Hayati kepada Siswa

Jurnia_ewita jurnia

Biodiversity is an important topic in biology learning, playing a significant role in fostering students' ecological awareness. Unfortunately, biology instruction in schools is often theoretical and underutilizes the potential of the surrounding environment as a learning resource. This conceptual article discusses the importance of utilizing the school environment to introduce students to biodiversity. School environments such as parks, gardens, or surrounding areas with diverse flora and fauna can serve as engaging natural laboratories. By implementing an environmental-based learning approach, students can learn contextually, actively, and meaningfully. The results of the conceptual analysis indicate that students' direct involvement in observing and recognizing the biodiversity around them can improve their understanding of biological concepts, foster environmental awareness, and strengthen their scientific character. Therefore, utilizing the school environment as a learning resource not only enriches the learning experience but also serves as an effective strategy for instilling the values of biodiversity conservation from an early age.

Analisis Penerimaan Konsumen dan Kelayakan Finansial Bumbu Instan Abon Ikan Dengan Penambahan Daun Jeruk Purut (Citrus histrix)

Cevan Cantata Gurusinga

Abon ikan umumnya memiliki aroma amis sehingga diperlukan kreasi dengan penambahan daun jeruk purut (Citrus hystrix) untuk mengurangi aroma amis pada abon tersebut. sehingga diperlukan penambahan daun jeruk perut pada bumbu instan abon ikan. Sebagai produk baru bumbu abon ikan ini perlu dilakukan analisis penerimaan konsumen serta kelayakan finansial. Tujuan penelitian ini untuk menganalisis penerimaan konsumen terhadap bumbu instan abon ikan dengan penambahan daun jeruk purut dan menganalisis kelayakan finansial dari usaha bumbu instan abon ikan. Penelitian ini dilakukan dengan metode eksperimen dengan menggunakan Rancangan Acak Lengkap (RAL) dengan perlakuan penambahan daun jeruk purut yaitu P1 (0 gram), P2 (2 gram), P3 (4 gram), P4 (6 gram) dan P5(8 gram). Hasil penelitian menunjukkan bahwa pengaplikasian bumbu instan memiliki pengaruh yang berbeda sangat nyata pada parameter warna, aroma, dan rasa. Sedangkan untuk parameter tekstur tidak berbeda nyata terhadap penerimaan konsumen dan bumbu yang menjadi perlakuan terbaik adalah bumbu dengan perlakuan 3 dengan 4 gram daun jeruk purut. Dari hasil analisis finansial usaha bumbu instan abon ikan dapat dikatakan layak dijalankan dikarenakan, NPV sebesar 874.515.101, IRR = 187,8% > tingkat suku bunga, Net B/C = 1,290 > 1 dan PP = 1 tahun 2 bulan 3 hari dengan proyeksi umur usaha untuk 10 tahun produksi.

TINGKAT KERAPATAN DAN TUTUPAN VE TINGKAT KERAPATAN DAN TUTUPAN VEGETASI MANGROVE ESTUARI PERANCAK

Gede Agus Surya Pratama

Hutan mangrove merupakan hutan yang terdapat di kawasan pesisir pantai yang fungsinya menahan air laut atau laju gelombang pada saat terjadinya pasang tertinggi. Tujuan dari penelitian ini adalah untuk mengetahui tingkat kerapatan dan tutupan vegetasi mangrove di perancak. Metode yang digunakan adalah dengan survei lapangan dan analisis citra satelit. Hasil yang diperolej yaitu Kerapatan mangrove pada tahun 2024 adalah 0,040-1 dan pada tahun 2025 0,040-1 dengan jenis vegetasi yang mendominasi adalah Bruguiera dan Rhizopora. Kualitas air di Lokasi penelitian Adalah suhu sebesar 30,4˚C, Ph 8,4 dan Salitas perairan Adalah 32. Substrat yang ada dilokasi penelitian Adalah tekstur kasar (pasir dan lempung berpasir)

Analisis Mikroplastik pada Saluran Pencernaan dan Insang Ikan Petek (Leiognathus splendens) di Sungai Remu Papua Barat Daya

Nurfitri Rahim, Siti Hajaria Kilwo

Mikroplastik merupakan salah satu polutan yang menjadi perhatian global karena berdampak buruk terhadap organisme akuatik dan kesehatan manusia. Penelitian ini bertujuan untuk menganalisis keberadaan mikroplastik pada saluran pencernaan dan insang ikan petek (Leiognathus splendens) yang ditangkap di Sungai Remu, Kota Sorong, Papua Barat Daya. Pengambilan sampel dilakukan di tiga stasiun berbeda menggunakan metode purposive sampling. Identifikasi mikroplastik dilakukan dengan metode digesti menggunakan larutan KOH 10%, kemudian diamati di bawah mikroskop stereo. Hasil penelitian menunjukkan bahwa total mikroplastik yang ditemukan terdiri atas empat jenis, yaitu fiber, film, fragmen, dan pellet. Fiber merupakan jenis yang paling dominan dengan jumlah 11 partikel, diikuti oleh film (10 partikel), fragmen (2 partikel), dan pellet (1 partikel). Distribusi mikroplastik pada organ menunjukkan bahwa usus lebih banyak mengandung mikroplastik dibandingkan insang, terutama di stasiun hilir. Pola spasial mengindikasikan bahwa jumlah mikroplastik meningkat dari hulu ke hilir, sejalan dengan meningkatnya aktivitas antropogenik di sekitar sungai. Hasil ini memperkuat bukti bahwa Sungai Remu telah mengalami pencemaran mikroplastik yang cukup serius, yang dapat menimbulkan risiko ekologis bagi biota perairan maupun kesehatan manusia yang mengonsumsi ikan dari perairan tersebut.

PENENTUAN KUALITAS BENIH BERDASARKAN HUBUNGAN PANJANG DAN BERAT YUWANA IKAN KERAPU CANTANG DALAM FASE PENDEDERAN RECIRCULATING AQUACULTURE SYSTEM (RAS

Jeremy Saut Raya Tuah Saragih

This study aimed to analyze the length-weight relationship and identify the growth pattern of juvenile hybrid grouper (Epinephelus fuscoguttatus × Epinephelus lanceolatus) during the nursery phase in a Recirculating Aquaculture System (RAS).The research employed a sample size of 95 juveniles for each of the two size groups (10 cm and 11 cm). The 10 cm group exhibited a mean total length of 107.10 mm and a mean weight of 20.77 g, while the 11 cm group had a mean total length of 117.44 mm and a mean weight of 30.31 g. Linear regression analysis demonstrated a negative allometric growth pattern in both groups, indicating that length growth was more pronounced than weight gain. The coefficients of determination (R2) were 0.420 for the 10 cm group and 0.642 for the 11 cm group, suggesting that 42% and 64.2% of the variation in body weight, respectively, was attributable to changes in body length. Throughout the study, environmental water quality parameters were maintained within the optimal range as specified by the Indonesian National Standard (SNI). In conclusion, although the juveniles demonstrated negative allometric growth, the RAS proved effective in sustaining a favorable rearing environment. Further research encompassing different developmental stages is recommended to achieve a more comprehensive understanding of the species' growth dynamics.

Analisis Kelayakan Finansial Udang Vaname di Desa Bratasena Adiwarna Kecamatan Dente Teladas Kabupaten Tulang Bawang

Rafiqah Amany Rele

Udang vaname dari sudut pandang ekonomi memiliki prospek dan laba yang menguntungkan meskipun seringkali mengalami tantangan finansial dan teknis yang lebih besar. Penelitian ini bertujuan mengidentifikasi dan mengkaji alasan petambak masih bertahan dan tetap melakukan budidaya udang vaname serta menganalisis kelayakan finansial dan sensitivitas usaha budidaya udang vaname. Penelitian ini menggunakan metode studi kasus yang dilakukan di Desa Bratasena Adiwarna, Kecamatan Dente Teladas, Kabupaten Tulang Bawang pada Bulan Januari sampai Februari 2025. Responden dalam penelitian ini berjumlah 70 orang petambak menggunakan metode proportional random sampling. Penelitian ini menggunakan metode analisis kelayakan finansial meliputi NPV, Net B/C, Gross B/C, Payback Period, IRR, dan analisis sensitivitas, serta analisis deskriptif kualitatif meliputi faktor internal dan eksternal. Hasil penelitian menunjukkan bahwa alasan terbanyak yang mendasari petambak masih membudidayakan udang vaname karena komitmen pada usaha. Penelitian ini menunjukkan bahwa budidaya udang vaname memberikan nilai NPV sebesar Rp828.872,784, IRR sebesar 74,85 persen, Gross B/C sebesar 1,57, Net B/C sebesar 9,24, Payback Period sebesar 4,78. Budidaya udang vaname masih layak diusahakan apabila terjadi penurunan harga jual udang vaname sebesar 15 persen, kenaikan biaya pakan sebesar 20 persen, dan penurunan produksi sebesar 28 persen.

STUDY ON WATER QUALITY AND POLLUTION CAPACITY OF SILANDAK RIVER, SEMARANG

Berliana Putri Debora, Siti Mira Rahayu, Ratna Suharti, Iya Purnama Sari

The Silandak River has a function as a water supplier in agricultural irrigation and drainage systems to reduce flood risk. The water quality of the Silandak River is declining due to household waste, factory waste, fish pond activities, and fishing boats that disrupt the ecosystem. This study aims to analyze the level of pollution and the carrying capacity of the pollution load in the Silandak River. This research was conducted in July-September. Sampling was carried out at six stations that are suspected of having the potential to experience pollution. The results of the water quality analysis of the Silandak River show that the values of TSS, nitrite, total phosphate, BOD, COD, and DO are not under the class II water quality standards of Government Regulation No. 22 of 2021, while the values of TDS, nitrate, and ammonia still meet the quality standards. The results of the Pollution Index (IP) analysis at Stations I, II, III, and VI are in moderate pollution conditions while Stations IV and V are in heavy pollution conditions. The river capacity for TSS, nitrite, phosphate, BOD, COD, and DO parameters has exceeded the pollutant quota at each observation station. Meanwhile, for the parameters of TDS, nitrate, and ammonia, it is still in the pollutant quota so it is still in the safe category. Pollution that occurs in the Silandak River is associated with high COD and BOD parameters. This is caused by domestic waste and factory industry inputs to the river.