Pengaruh Konsentrasi Sublethal Diazinon 60 EC Terhadap Udang Windu (Penaeus monodbn Fab.) Stadia Pasca Larva

ENI YUNIASTUTI. J 201 92 0746. Pengaruh Konsentrasi Sublethal Diazinon 60 EC Terhadap Udang Windu (Penaeus monodbn Fab.) Stadia Pasca Larva (dibawah bimbingan Hendarko Sugondo dan Jafron Wasicallidayat). Insektisida diazinon 60 EC sangat potensial mencemari perairan dan banyak digunakan di area pertanian dewasa ini. Penggunaan insektisida ini dapat membahayakan kehidupan organisme perairan seperti udang windu (Penaeus monodon Fab.) Penelitian ini bertujuan untuk mengetahui nilai LC 50-96 jam diazinon 60 EC, engetahui dan mengkaji pengaruh konsentrasi sublethal diazinon 60 EC terhadap pertumbuhan dan perbedaan konsumsi pakan udang windu stadia pasca larva. Metode penelitian menggunakan metode "bioassay" statis, meliputi 3 tahapan, yaitu : penentuan batas konsentrasi ambang, penentuan konsentrasi LC 50-96 jam dan penentuan konsentrasi sublethal. Rancangan yang digunakan adalah Rancangan Acak Lengkap dengan perlakuan 6 konsentrasi diazinon 60 EC dan dilakukan dengan 3 kali ulangan. Hasil pengujian menunjukkan bahwa nilai batas konsentrasi ambang diazinon 60 EC terhadap udang windu stadia pasca larva adalah 10-5-10-2 ppm, dan nilai konsentrasi LC 50-96 jam sebesar 6,4 x 10-4 ppm. Adapun konsentrasi sublethal yang diperlakukan adalah (3,2 x 10-5 ppm), (6,4 x 10-5 ppm), (9,6 x 10-5 ppm), (1,28 x 10-4 ppm), (1,6 x 10-4 ppm). Konsentrasi sublethal tersebut telah menghambat pertumbuhan, serta mengurangi konsumsi pakan udang windu stadia pasca larva. The Effect of Diazinon 60 EC Sublethal Concentration On The Penaeid Shrimp (Penaeus monodon Fab.) Pasca Larvae Phase (Hendarko Sugondo and Jafron Wasiq Hidayat). Diazinon 60 EC Insenticide is very potential to pollute the aquatic ecosystem. Mostly applied in agriculture areas in this time. This utilization of insecticide can endanger to aquatic organism such as Penaeus monodon. This research is purpose to know the lethal concentration (LC) 50-96 hours of diazinon 60 EC, to observe the effect of diazinon 60 EC sublethal concentration on the growth, and difference feeding consumption. Research is done by bioassay static method, consist of 3 step : namely, i.e threshold concentration limit, LC 50-96 hours concentration and sublethal concentration. Research design is Complete Randomiz-d Design of 6 treatment of diazinon 60 EC concentration and undertaken on three repetitions. As a result, threshold concentration limit of diazinon 60 EC on the Penaeus monodon pasca larvae phase is 10-5-10-2 ppm. Effective concentration (LC 50-96 hours is 6,4 x 10-4 ppm. The sublethal concentration can applied are (3,2 x 10-5 Pipm), (6,4 x 10-5 ppm), (9,6 x 10-5 ppm), (1,28 x 10-4 ppm), (1,6 x 10-4 ppm). That sublethal concentration have inhibition growth and decrease feeding consumption of Penaeid shrimp pasca larvae phase

The Impact of Mangrove Restoration on the Social Economy of the Community of Batu Panjang Village, Rupat Island, Riau Province: english

Mangrove restoration is an effort to restore degraded mangrove ecosystems with the aim of increasing environmental sustainability, biodiversity conservation and providing social and economic benefits for the community. This research aims to determine the extent to which mangrove restoration can influence the socio-economic life of the community in Batu Panjang Village, Bengkalis Regency. The research method used is descriptive qualitative by systematically analyzing and processing data based on the results of observations and interviews with farmer groups, village officials and stakeholders in Batu Panjang Village. The results of this research show that restoration activities provide (1) a positive impact on increasing community knowledge and understanding regarding the function and role of mangroves in coastal area conservation efforts, (2) community empowerment has been carried out by forming a farmer group, namely the Jeram Batu Panjang (JBP) group and the STYA group which plays a role from the land clearing stage, to the planting stage, (3) but has not yet provided/shown a significant impact in increasing income which will affect the social and economic conditions of the community in Batu Panjang Village, Rupat District. This is shown by the research results that the income earned by the community from mangrove restoration activities from the land clearing stage to the planting stage is only around IDR 475,000 on average, still far below the Bengkalis Regency Minimum Wage of IDR 3,599,029.72

Threats to Mangrove Ecosystems and Their Impact on Coastal Biodiversity: A Study on Mangrove Management in Langsa City

The coastal area is a complex and interconnected system of diverse ecosystems, with mangrove ecosystems standing out as one of the most productive. However, global mangrove ecosystems, including those in Langsa City, face multiple threats from human activities and natural hazards. This study focuses on examining the various threats impacting the mangrove ecosystem in Langsa City, including tourism and urban development, climate change, regional development, human activities, and sedimentation. Mangrove ecosystems have specific requirements for survival, making these threats particularly concerning. Through field observations and analysis, this study explores the impact of these threats on the mangrove ecosystem's well-being and its correlation with the overall coastal biodiversity. Additionally, the research delves into the management practices implemented by the local government to preserve the mangrove ecosystems. The findings reveal the severity of threats to the mangrove ecosystem's viability and its implications for coastal biodiversity sustainability. The study also sheds light on the local government's mangrove management system, providing valuable insights into current conservation efforts. By understanding the threats faced by the mangrove ecosystem and the management practices in place, this research contributes to the preservation and sustainable use of this vital coastal resource