Effect of using fresh palm oil and used palm oil as a fatliquoring agent to the physical quality of tilapia fish skin in vegetable tannery

Fish skin is one of the alternative materials to replace the common animal skin that used in the leather tannery. This research was carried out by vegetable tanning to the tilapia fish skin using selected concentration of fresh palm oil and used palm oil. The study aims to find out the physical quality of leather through the using of fresh and used palm oil as fatliquoring agent in the vegetable tannery process. The same concentration of fresh palm oil (5%) and used palm oil (5%) were used in this study. The parameter of tensile strength, elongation, and shrinkage temperature as physical quality was observed in triplicates. Based on the results, tensile strength and leather elongation were significantly increased, while the shrinkage temperature was not significantly affected. In conclusion, the addition of palm oil caused the increasing tilapia fish skin quality that can be used for commercial products, and it became the alternative material that could be use in vegetable tannery processing.

Effect of using fresh palm oil and used palm oil as a fat liquoring agent to the chemical quality of leather from tilapia fish skin

Tilapia skin has a high value in the form of tanned tilapia skin. One of the factors that play an important role in the tanning process is the using of tanning agents. This research was carried out by vegetable tanning to the tilapia fish skin using selected concentration of fresh palm oil and used palm oil. The study aims to find out the chemical quality of leather through the using of fresh and used palm oil as fat liquoring agent in the vegetable tannery process. The same concentration of fresh palm oil (10%), and used palm oil (10%) were used in this study. The parameter of fat content, and water content as chemical quality was observed in triplicates. Based on the results, the fat content of the leather using fresh palm oil (19.265%) was significantly increased (p<0.05) compared to used palm oil (15.825%), while the water content was also significantly different (p<0.05). In conclusion, the addition of palm oil improved the moisture of tilapia fish skin and become softer that can be used for commercial products, and it became the alternative material that could be use in vegetable tannery processing.

Exploration Of Knowledge And Attitudes Of Remang Fish Skin Cracker Producers Related To Food Labeling In Indramayu Cracker Industry Area

As many as 20 out of 30 producers who sell remang fish skin crackers with incomplete food labels and consumers still pay less attention to the food labels on the product packaging. This study aims to explore the knowledge and attitudes of remang fish skin cracker producers on food labels in the Indramayu Cracker Industrial Area. In-depth interviews with 16 producers were conducted using a case study approach with 5 (five) domains, namely knowledge of food labels, attitudes towards food labels, skills to making food labels, perceptions of food labels (images), and marketing strategies. The results showed that based on the knowledge, attitudes, and skills of remang fish skin cracker producers on food labels, it was stated that the producers were able to make food labels.

Relationships between pond water and tilapia skin microbiomes in aquaculture ponds in Malawi

Intensification of fish farming practices is being driven by the demand for increased food production to support a rapidly growing global human population, particularly in lower-middle income countries. Intensification of production, however, increases the risk of disease outbreaks and thus likelihood for crop losses. The microbial communities that colonise the skin mucosal surface of fish are poorly understood, but are important in maintaining fish health and resistance against disease. This skin microbial community is susceptible to disruption through stressors associated with transport, handling and the environment of intensive practices, and this risks the propagation of disease-causing pathogens. In this study, we characterised the microbial assemblages found on tilapia skin — the most widely farmed finfish globally — and in the surrounding water of seven earthen aquaculture ponds from two pond systems in distinct geographic regions in Malawi. Metabarcoding approaches were used to sequence the prokaryotic and microeukaryotic communities. We found 92% of prokaryotic amplicon sequence variants were common to both skin and water samples. Differentially enriched and core taxa, however, differed between the skin and water samples. In tilapia skin, Cetobacterium, Paucibacter, Pseudomonas and Comamonadaceae were enriched, whereas, the cyanobacteria Cyanobium, Microcystis and/or Synechocystis, and the diatom Cyclotella, were most prevalent in pond water. Ponds that clustered together according to their water prokaryotic communities also had similar microeukaryotic communities indicating strong environmental influences on prokaryotic and microeukaryotic community structures. While strong site-specific clustering was observed in pond water, the grouping of tilapia skin prokaryotes by pond site was less distinct, suggesting fish microbiota have a greater buffering capacity against environmental influences. The characterised diversity, structure and variance of microbial communities associated with tilapia culture in Malawi provides the baseline for studies on how future intensification practices may lead to microbial dysbiosis and disease onset.HighlightsTilapia skin communities vary in different ponds but share some common taxaPond sites have a stronger influence on water microbiome community structure than in fish skinSelected skin-associated taxa could be used to monitor dysbiotic eventsThe fish skin microeukaryotic community is complex and poorly characterised

Acellular fish skin grafts for the management of wounds in dogs and cats: 17 cases (2019–2021)

OBJECTIVE To report the clinical outcomes of the use of acellular fish skin grafts (FSGs) for the management of complex soft tissue wounds of various etiologies in dogs and cats. ANIMALS 13 dogs and 4 cats with complex wounds treated with FSGs between February 2019 and March 2021. PROCEDURES Medical records were reviewed for information regarding cause, location, size of the wound, management techniques, complications, and clinical outcomes. RESULTS In dogs, the number of FSG applications ranged from 1 to 4 (median, 2 graft applications). The time between each application ranged from 4 to 21 days (median, 9.5 days). Time to application of the first FSG ranged from 9 to 210 days (median, 19 days). Wounds closed by second-intention healing following the first fish skin application between 26 and 145 days (median, 71 days; n = 12). In cats, 1 or 2 FSGs were used, and the wounds of 3 of 4 cats healed completely by secondary intention. The wounds of 1 dog and 1 cat did not heal. There were no adverse events attributed to the use of the FSGs. CLINICAL RELEVANCE For dogs and cats of the present study, complete healing of most wounds occurred with the use of FSGs, the application of which did not require special training, instruments, or bandage materials.

Alutiiq Fish Skin Traditions: Connecting Communities in the COVID-19 Era

The Alutiiq, Indigenous inhabitants of the coastal regions of Southwest Alaska, created garments made from fish skins, especially salmon, expertly sewn by women from Kodiak Island. Traditionally, Alutiiq education focused on acquiring survival skills: how to navigate the seas in all weathers, hunting, fishing and tanning animal skins. Today, many Alutiiq people continue to provide for their families through subsistence fishing, honouring the ocean and navigating difficult times by listening to their collective wisdom. This paper describes the series of fish skin tanning workshops taught by June Pardue, an Alutiiq and Inupiaq artist from Kodiak Island that connected participants in Alaska Native communities during the COVID-19 isolation months. Through an online platform, June passed on expert knowledge of the endangered Arctic fish skin craft, assisting participants in coping with the pandemic crisis by tapping into their knowledge of the natural world, cultural resourcefulness, storytelling abilities and creative skills. Brought into the digital age, the fish skin workshops strengthened connections among Alutiiq and Alaskan craftspeople while establishing new connections with an expanded network of fashion designers, museum curators, conservators and tanners. Finally, the paper highlights how fish skin Indigenous practices address the United Nations Sustainable Development Goals (SDGs) regarding poverty, health and well-being, gender equality, clean water and sanitation, decent work and economic growth, social inequality, responsible consumption and production, climate change and maritime issues.