Researchers have published the first experiments to gauge the ability of a biologically inspired robotic fish to induce fear-related changes in mosquitofish. Their findings indicate that even brief exposure to a robotic replica of the mosquitofish’s primary predator—the largemouth bass—can provoke meaningful stress responses in mosquitofish, triggering avoidance behaviors and physiological changes associated with the loss of energy reserves, potentially translating into lower rates of reproduction.
“To the best of our knowledge, this is the first study using robots to evoke fear responses in this invasive species,” says Maurizio Porfiri, professor at the Tandon School of Engineering at New York University. “The results show that a robotic fish that closely replicates the swimming patterns and visual appearance of the largemouth bass has a powerful, lasting impact on mosquitofish in the lab setting.”
The team exposed groups of mosquitofish to a robotic largemouth bass for one 15-minute session per week for six consecutive weeks. The robot’s behavior varied between trials, spanning several degrees of biomimicry. Notably, in some trials, the researchers programmed the robot to incorporate real-time feedback based on interactions with live mosquitofish and to exhibit “attacks” typical of predatory behavior—a rapid increase in swimming speed.
Although pangasius exports to the German market decreased following the general trend of the EU region for more than 10 years from 2008 to 2018, but in recent years, especially in the first 5 months of 2019, the export value of pangasius to the German market continued to rose. Particularly in May, 2019, pangasius export value to this market hiked up: 144,7% compare to the same period in 2018. By the end of May, 2019, the export value of Vietnamese pangasius exported to Germany reached USD 14.7 million, up 74.6% compared to the same period in 2018.
It can be said that Germany is one of good importers for Vietnamese pangasius in the EU. According to ITC statistics, in the first 4 months of 2019, the average import prices of frozen fillets pangasius (HS 030462) ranged from USD 3.5 to USD 3.96/kg.
Currently, there are about 15 enterprises exported pangasius to the Germany, most of which are concentrated in the two provinces of Dong Thap and Can Tho. Frozen fillets pangasius products accounts for more than 90% of pangasius export structure of enterprises to Germany.
Malta is paying too high a price for the fish farming industry, the Democratic Party said on Sunday as it hit out at large patches of slime blighting the coast.
In a statement, it observed that a consortium which owns a huge blue-fin tuna farm just off Comino was said to have applied for a PA permit.
"This is peak season for tuna fattening before slaughtering begins in October, and our coastal waters from Armier to Sliema are again polluted with slime. This is not naturally occurring foam, but slime. This time round, Comino has also been adversely hit," the party said.
Aquatic animal diseases are the most significant constraints to development and management of aquaculture. Aquatic animal diseases included non-infectious and infectious disease. An aquatic animal is highly affected by infectious diseases such as bacterial, viral, fungi and parasites. Viral aquaculture diseases are difficult to diagnose and control with the medication. No specific treatment is available for viral aquaculture diseases. Viral aquaculture diseases included infectious hematopoietic necrosis (IHN), viral hemorrhagic septicemia (VHS), channel catfish virus disease (CCVD), and infectious pancreatic necrosis (IPN). The aquaculture industry is a fast-growing industry but it’s facing major challenges such as prevention and treatment of diseases among shrimp and aquaculture species.
Advancement in the field of aquaculture therapeutics favors the growth of the viral aquaculture disease treatment market. Growing demand for the effective drug for the viral aquaculture disease treatment expected to boost up the growth of the market. Increasing incidence of viral infectious diseases among aquaculture species propels the demand for the viral aquaculture disease treatment therapeutics. Globally increasing consumption of fishes boosts up the growth of the viral aquaculture disease treatment therapeutics. Growing research and development in the field of veterinary medicines and increasing demand for aquaculture expected to favor the growth of the viral aquaculture disease treatment market. Increasing production of aquaculture species and growing government programs for animal health expected to propel the growth of the viral aquaculture disease treatment market. Moreover, strict regulation regarding the approval of new drug and vaccine expected to restrain the growth of the viral aquaculture disease treatment market. Unavailability of effective treatment option expected to hamper the growth of global viral aquaculture disease treatment market.
The ghost netting Matt Waller hauled out of seemingly pristine waters near Boston Island, in South Australia last year was the last straw.
The tourism operator spends his days showing tourists the beauty of the islands south of Port Lincoln as they head out to dive with the ultimate ocean predator, great white sharks, or playful endangered Australian sea lions.
Mr Waller's workplace is dotted with isolated islands that have remained largely untouched since Matthew Flinders mapped the area in 1802.
We applaud the government for its successful endeavours to increase fish production in the country—efforts that have resulted in Bangladesh ranking third in producing fish from inland water bodies, according to a report by the UN’s Food and Agriculture Organization (FAO) in 2018’. In the 2016-2017 fiscal year, Bangladesh produced a total of 41,34,000 metric tonnes of fish, including a first-time surplus of 84,000 tonnes. One of the ways this has been possible is by prioritising conservation of jatka (small hilsa) and other species through periodic bans on catching, transporting and selling fish from natural water bodies like the rivers and the sea. This ensures safe breeding and spawning of fish and helps to protect their fries. The bans, however, while significantly increasing fish production, have a detrimental effect on the fisher communities as their survival depends on the amount of fish they can catch and sell each day. During the bans, the fisherfolk are essentially jobless and fall into financial hardship.
At a recent seminar, discussants highlighted the need to help out the fishermen during these lean times when they cannot fish. Long-term planning is needed for this which would ensure alternative livelihoods and also provide adequate allowances to the fishermen and their families, most of whom are poor and lead miserable days during the ban periods. The government should start registering fishermen so that they can be properly monitored and assisted. The state minister for fisheries and livestock gave his assurance at the seminar that the irregularities in distribution of food during the ban periods have been reduced significantly in recent times which we hope is something that will be sustained.
Life saving medication manufactured in Belgium and fresh salmon from Norway are just two of the commodities that have been transported across the world by Emirates SkyCargo.
Since the start of its services to Belgium and Norway in September 2014, the freight division of Emirates has flown over 235,000 tonnes of cargo to and from these countries, stimulating trade and helping local businesses reach global markets.
Emirates SkyCargo has facilitated over 60,000 tonnes of exports from Belgium over the last five years. Soon after the launch of passenger flight services to Brussels, the air cargo carrier also started scheduled freighter operations to the city in 2015.
Snow crab sold for world record USD 46,000 Japan
A snow crab caught off Tottori Prefecture was sold for a record JPY 5 million (USD 46,000) at auction, the local fisheries association said Thursday.
The value paid in the auction is actually a &qu...