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GAINESVILLE, Fla. – A camera can accurately count freshwater fish, even in the thickest of underwater vegetation, a key finding for those who manage fisheries and control the invasive plant hydrilla, new University of Florida research shows.
The finding by UF/IFAS scientists can help researchers understand how many and which fish species are using dense plant habitats, said former UF/IFAS graduate student Kyle Wilson.
While cameras have been used to document fish behavior – including eating and breeding ─ this marks the first time scientists have used video to count fish in underwater plant habitats, Wilson said. In addition, no prior studies that used cameras to count fish verified their fish populations.
“It is commonly assumed that dense and invasive plants, like hydrilla, can drastically change fish habitat quality, primarily through changes in dissolved oxygen levels, water chemistry and habitat structure,” Wilson said. “Whether these changes are good or bad for fish has previously remained uncertain due to sampling problems in dense plant habitats. Using underwater cameras, we have shown that fish can and do use habitats we previously thought were too stressful for fish habitat.”
This is a big problem, especially with hydrilla, a plant that has invaded lakes throughout Florida, much of the U.S., Central America, South Africa and Australia, Wilson said. He estimated Florida spent up to $14 million per year throughout the 2000s to manage hydrilla, while the U.S. spent about $100 million per year in the 2000s for aquatic plant management.
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See video here: bit.ly/1Cbois7
GAINESVILLE, Fla. – For every degree Celsius that the temperature increases, the world loses 6 percent of its wheat crop, according to a new global study led by a University of Florida scientist. That’s one fourth of the annual global wheat trade, which reached 147 million tons in 2013.
Senthold Asseng, a UF professor of agricultural and biological engineering, used a computer model approach to reach the finding of temperature increases and wheat production.
“We started this with wheat, as wheat is one of the world’s most important food crops,” said Asseng, whose team’s study was published online Dec. 22 in the journal Nature Climate Change. “The simulations with the multi-crop models showed that warming is already slowing yield gains, despite observed yield increases in the past, at a majority of wheat-growing locations across the globe.”
GAINESVILLE, Fla. – Picture this: Researchers ask you to sit and gaze at plants from a retail store’s garden display. You look at a computer screen, which tracks how long your eyes take to focus on a visual cue and how long you fixate on it.
Those cues can include what the plant looks like, a price tag or how it was grown.
With results of a new national study, researchers now know that computer software allows researchers to link eye movements to the plants people buy, a finding that can tell retailers more about how to use signs to lure potential buyers. Those are important issues for retailers and consumers nationally, but particularly in Florida, where the environmental horticulture industry generates about $12 billion a year, according to University of Florida estimates.
Hayk Khachatryan, a UF assistant professor in food and resource economics, helped conduct the study. Researchers wanted to understand how visual behavior could influence purchasing choices. They studied consumers’ choices as project participants viewed signs showing several plant attributes. For example, the plants might have been grown using water-saving or energy-saving techniques.
“Investigating the link between consumers’ visual behavior and their preferences can significantly improve our understanding of the effects of marketing practices that use visual cues to attract more consumers,” said Khachatryan, who’s based at the Mid-Florida Research and Education Center in Apopka, which is part of the Institute of Food and Agricultural Sciences.
Gainesville, Fla. – Small- and mid-sized growers often cite marketing as one of their greatest challenges. Yet, there never seems to be enough time or money to promote your products directly to those who may want to purchase them. Florida MarketMaker and Florida Food Connect are two resources managed by UF/IFAS that aim to help alleviate the burden of marketing for Florida’s growers. While Florida MarketMaker unites growers with potential markets throughout the state, Florida Food Connect is a tool that links schools with the local producers who can meet their needs.
Florida MarketMaker provides a free and simple, yet powerful, web-based search tool to connect with others across the food production and distribution chain. It is the largest and most in-depth food-related database of its kind, featuring a diverse community of more than 81,000 Florida businesses: farmers/ranchers, fisheries, seafood dealers, farmers markets, food hubs, food pantries, processors/packers, wholesalers, retailers, distributors, wineries, restaurants and other types of buyers.
Essentially, MarketMaker gives growers the power to create their own searchable websites, opening the door for a flood of buyers to discover them.
GAINESVILLE, Fla. — The holiday shopping season is in full swing and, as people ponder what to get for their friends and family, gift cards are often a viable solution for the picky person or the cousin you just don’t know that well. (more …)
GAINESVILLE, Fla. — University of Florida scientists believe they’ve found what could be the first biological control strategy against laurel wilt, a disease that threatens the state’s $54 million-a-year avocado industry.
Red ambrosia beetles bore holes into healthy avocado trees, bringing with them the pathogen that causes laurel wilt. Growers control the beetles that carry and spread laurel wilt by spraying insecticides on the trees, said Daniel Carrillo, an entomology research assistant professor at the Tropical Research and Education Center in Homestead.
But a team of researchers from the Tropical REC and the Indian River Research and Education Center in Fort Pierce have identified a potential biological control to use against redbay ambrosia beetles that could help growers use less insecticide.
GAINESVILLE, Fla. – A new e-book from the University of Arkansas System features University of Florida scientists’ quest to establish a Florida organic strawberry industry.
A chapter titled “Organic open-field and high tunnel strawberry cropping systems for long-term viability of the southeastern industry” examines the participation of five Institute of Food and Agricultural Sciences faculty in the National Strawberry Sustainability Initiative sponsored by the Walmart Foundation.
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GAINESVILLE, Fla. – People concerned with future consequences of their decisions will pay up to 16 cents more for eco-friendly plants, a new University of Florida study shows.
While 16 cents may not seem like much, researchers see any willingness to pay more to help the ornamental plants industry and the environment as good news.
Previous research has investigated the effects of perceived long-term consequences on people’s environmental behavior, including recycling or using public transportation. So UF food and resource economics assistant professor Hayk Khachatryan wanted to understand how differences in people’s perceptions of long- and short-term consequences affect plant preferences and purchase decisions.
GAINESVILLE, Fla. — Recreational anglers who normally fish in the Gulf of Mexico lost up to $585 million from lost fishing opportunities in the year of the Deepwater Horizon oil spill and could be entitled to compensation, according to a new University of Florida study.
After a disaster such as an oil spill, trustees — which could include federal, state or tribal authorities – often attempt to secure financial compensation from those responsible.
In the Gulf oil spill, those monies would not go back to individual fishermen, but instead might fund ecosystem improvements or to stock more fish in the Gulf on the fishermen’s behalf, said UF food and resource economics professor Sherry Larkin.
In December 2012, BP agreed to pay $2.3 billion to commercial fishermen, seafood boat captains and crew, seafood vessel owners and oyster leaseholders, but trustees have yet to seek compensation on behalf of recreational fishermen.
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GAINESVILLE, Fla. – A University of Florida-led research team’s development of a tracking system could change the way companies ship fresh fruits and vegetables, letting them know which produce is closest to expiration and providing consumers the freshest products available. (more …)