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All Journal Journal of Marine Resources and Coastal Management
Christiananda
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science

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Potential utilization of fish waste as the glue from Kawakawa (Euthynnus affinis) scales, skin, and bones Christiananda; Ardiansyah, Mohammad Bagus Rizan; Samudra, Muhammad Farhan Satya Bintang; Ramadhanu, Rizky Akbar
Journal of Marine Resources and Coastal Management Vol. 5 No. 1 (2024)
Publisher : UIN Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/mrcm.v5i1.2093

Abstract

Waste from fish scales, skin and bones in the fishing industry are currently only used as fish meal or handicrafts. Fish waste is very abundant, especially in fish that are widely consumed by the public, such as little tuna or Kawakawa (Euthynnus affinis). Therefore, innovations are needed in processing fish scales, skin and bones waste, namely as ingredients in making fish glue. Fish glue is an adhesive resulting from the extraction of fish scales, skin and bones which contains collagen, which can be hydrolyzed in hot water and dilute acid to form fish glue. The aim of this research is to determine the effect of using fish skin, scales and bone waste materials on the results of glue products. The research method is by extracting bones, scales, and skin of Kawakawa using 5% CH3COOH solution in a ratio of 1: 1, then filtered to obtain fish glue. This study used two treatments: the use of raw materials of bones, scales, and fish skin (Sample-1) and fish skin and scales only (Sample-2). The results of research showed that Sample-2 showed a higher total rendement or yield than Sample-1. In addition, Sample-2 has a more intense color than Sample-1. It is necessary to demineralize the raw materials (fish waste) to increase the results of collagen extraction.
Assessment of sea level rise and tidal flood vulnerability in the coastal region of Jepara, Central Java, Indonesia Christiananda; Sawiji, Asri; Santoso, Eko Hadi
Journal of Marine Resources and Coastal Management Vol. 5 No. 2 (2024)
Publisher : UIN Sunan Ampel Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29080/mrcm.v5i2.2201

Abstract

The coastal region of Jepara, Central Java, is increasingly vulnerable to environmental hazards due to rising sea levels, land subsidence, and climatic variability. Recent public concerns regarding the potential submergence of parts of Jepara and the possible reappearance of the ancient Muria Strait underscore the need for a scientific assessment of regional coastal stability. This study aims to evaluate the impacts of sea level rise on the vulnerability of Jepara’s coastal areas to tidal inundation. Using secondary data from 2013 to 2024, the analysis includes trends in mean sea level (MSL), sea surface temperature (SST), and documented land subsidence in nearby coastal cities. The results indicate an average annual MSL increase of 4.23%, with projections reaching up to 3.83 meters by 2050 if current trends persist. SST also shows a consistent upward trend, contributing to thermal expansion and sea level rise. Tidal flood mapping reveals that rice fields and coastal settlements are the most affected land uses, with 1,960.66 hectares of agricultural land and 207.48 hectares of residential area exposed to periodic inundation. The compounded effects of sea level rise, SST increase, and subsidence suggest an urgent need for mitigation planning and adaptive infrastructure to reduce future flood risks.
Co-Authors Ardiansyah, Mohammad Bagus Rizan Asri Sawiji Ramadhanu, Rizky Akbar Samudra, Muhammad Farhan Satya Bintang Santoso, Eko Hadi