IN BRIEF - Properties of Gels Formed from Jumbo Squid (Dosidicus gigas) Mantle Muscle
UNITED STATES
Saturday, December 14, 2024
Under Heat and Acid Treatment: Rheological and Calorimetric Analysis
Jumbo squid mantle muscle gels were prepared by using the one-step (90 °C/30 min) and the two-step (30 °C/1 h + 90 °C/30 min) heat treatments (HTs) with and without the addition of d-isoascorbic acid (IAA). Reactive sulfhydryl (-RSH) content, SDS-PAGE protein profiles, gel-forming ability in terms of their texture profile analysis (TPA), folding test (FT), and water holding capacity (WHC) were evaluated on experimental gels.
Additionally, the rheological and calorimetric behaviors of previously prepared sols were monitored. The –RSH content of gels showed no statistical differences (p = 0.05) due to the effect of HT; however, their content was reduced by 18.4% by the addition of IAA.
The TPA showed changes only in cohesiveness (p < 0.05). The FT evaluation indicated that all gels were A–B grade. The WHC of gels increased with the two steps of HT but decreased with the addition of IAA. The rheology and calorimetry of sols remained without major variations.
According to the SOFIA 2026 report presented last week, global aquaculture production registered a new record of 142 million tons in 2024, of which 103 million tons (live weight equivalent) corresponded to aquatic animals and 39 million tons (wet weight) to algae. Asia concentrated 92% of the total, followed by Latin America and the Caribbean (3%), Europe (2%), Africa (2%), North America (0.4%) and Oceania (0.2%).
If only aquatic animals are taken into account (103 million tonnes), aquaculture reached a new record, 53% of the total, having surpassed capture fisheries in the production of aquatic animals in 2021, thus confirming its role as a driver of growth in total aquatic animal production.
Source: ipac.aquacultura | Read the full article here
The Okayama University of Science and Murakami City have launched a joint research project to cultivate chum salmon (Oncorhynchus keta) in a land-based aquaculture system using an innovative land-based closed-recirculation aquaculture system (c-RAS).
Operating at the university’s Next-Generation Aquaculture Center, the initiative marks a major milestone for sustainable aquaculture. The initial batch of juvenile salmon, delivered from Murakami earlier this year, has grown to an average weight of 23 grams and an average length of 13 centimetres.
Murakami has been known as one of Japan’s leading salmon-producing regions along the Sea of Japan coast since the Heian period (794–1185). In recent years, however, climate change has altered the distribution of marine species, resulting in increased predation on released salmon juveniles by species such as yellowtail and Spanish mackerel that have expanded northward into the region.
Source: The Fish Site | Read the full article here
Norway’s government has approved production growth in three salmon farming regions while ordering a capacity reduction in one area under the country’s traffic light system for aquaculture.
The decision, announced by Fisheries and Oceans Minister Marianne Sivertsen Næss on Friday, could result in approximately 8,300 tonnes of additional maximum allowed biomass (MTB) being allocated in green-rated production areas. At the same time, production capacity in one red-rated area will be reduced by an estimated 5,300 tonnes.
The traffic light system determines whether salmon farming capacity can increase, remain unchanged or be reduced based on the impact of sea lice on wild salmon populations.
Source: SalmonBusiness | Read the full article here
Tetra Pakand Spanish seafood producer Jealsa have launched what they describe as the world’s first carton packaging solution for shelf-stable tuna, marking a significant innovation in one of the food industry’s most established categories.
The new packaging, based on Tetra Pak’s Tetra Recart technology, was introduced in Sweden last month through retailer Axfood in a 200ml Mini format and is now being made available to food producers and brands globally.
Developed through a collaboration between the two companies, the solution aims to provide an alternative to traditional metal cans while helping brands stand out in the growing shelf-stable tuna market, which is forecast to reach 12.4 billion units by 2030
MOMBASA – In a historic milestone, the first Our Ocean conference in Africa concluded in Mombasa with 320 commitments from over 100 governments and businesses, valued at $6.4 billion to protect oceans and the blue economy.
Among the key announcements, Canada will allocate $682 million to small craft harbors, and the World Bank will invest $1 billion over two years for resilient blue economies. French Polynesia will expand protection in Tainui Atea by 27,000 square kilometers.
As host, Kenya led with 42 commitments worth $1 billion, including $200 million for electronic monitoring on industrial fishing vessels. This measure aims to curb illegal, unreported, and unregulated (IUU) fishing, which costs Africa between $11 billion and $13 billion annually.
The forum brought together 5,000 delegates and highlighted the role of youth in a continent where 70% of the population is under 35 and views the sea as a source of employment and food security. The World Resources Institute (WRI) confirmed that 78% of historical commitments in the region are complete or in progress, marking a definitive shift toward financing and solutions led by Africa itself.
The sector is cautiously welcoming the new formula, which allows for a four-week fishing closure between January 15 and February 27.
France will maintain the temporary closure of certain fisheries in the Bay of Biscay in 2027 to reduce the accidental capture of cetaceans. The decision was announced by the French Minister of the Sea and Fisheries, Catherine Chabaud, during the Assises de la mer et de la pêche (Sea and Fishing Conference), held on June 18 and 19 in Cherbourg and organized by Le Marin and Ouest-France.
Based on average fuel consumption per vessel, length, fishing gear, and fishing grounds for 2024, the Ministry of Agriculture, Fisheries and Food has just granted the first aid payments to the fleet to alleviate the impact of rising diesel prices. This fulfills its promise made days ago and anticipates a payment to offset the fuel price increase resulting from the conflict in the Middle East. Initially, €6.8 million is being allocated to 4,308 shipowners and 4,650 vessels. They now have five days, starting this Saturday, to correct any errors, accept, or decline the aid.
Source: La Voz de Galicia | Read the full article here
China is continuing to be a major buyer of salmon – and seafood in general - from around the world. The latest data from the Norwegian Seafood Council shows that the huge increase in salmon purchasing which took off late last year shows no sign of letting up, although the pace of increase has slowed down.
The Council says the strong growth shows that the Chinese salmon market still has underlying strengths.
However, it is the lowest growth year-on-year since March 2025, when the market grew by “only” 25%. It is also the lowest monthly import figure since September last year.
Author: Vince McDonagh / Fish Farmer | Read the full article here
The Norwegian Seafood Councilis using Norway’s FIFA World Cup campaign to promote Norwegian seafood, highlighting that more than 500kg of fish and shellfish has been shipped to the national team’s training base in the United States.
National team chef Aron Espeland has relocated from Brasserie France in Oslo to Norway’s hotel in Greensboro, North Carolina, where he is responsible for catering for more than 60 players and staff during the tournament.The Seafood Council used the announcement to highlight seafood’s nutritional credentials, including its protein content, omega-3 fatty acids and vitamin D levels.
Source: SalmonBusiness | Read the full article here