Showing posts with label nutrients. Show all posts
Showing posts with label nutrients. Show all posts

Friday, 12 June 2015

Fish declines linked to effects of excess nutrients on coastal estuaries



Date:June 8, 2015

Source:University of California - Santa Cruz

Summary:A comprehensive study of a major California estuary has documented the links between nutrient runoff from coastal land use, the health of the estuary as a nursery for young fish, and the abundance of fish in an offshore commercial fishery. The study focused on Elkhorn Slough and Monterey Bay on California's central coast.


Tuesday, 18 March 2014

Eat more, die young: Why eating a diet very low in nutrients can extend lifespan

Date:
March 17, 2014

Source:
Wiley

Summary:
A new evolutionary theory claims that consuming a diet very low in nutrients can extend lifespan in laboratory animals, a finding which could hold clues to promoting healthier aging in humans. Scientists have known for decades that severely restricted food intake reduces the incidence of diseases of old age, such as cancer, and increases lifespan. The most widely accepted theory is that this effect evolved to improve survival during times of famine.


Monday, 25 February 2013

Raw Meat Diet May Not Be Enough for Cats (or Tigers): Pet Owners Risk Increased Pathogens, Nutrient Imbalances


Feb. 18, 2013 — Animal scientists say a raw meat diet is a good source of protein for cats, but pet owners may need to supplement with other nutrients.

In a new paper in the Journal of Animal Science, researchers from the University of Illinois at Urbana-Champaign and Omaha's Henry Doorly Zoo and Aquarium analyzed the value of raw meat diets for cats and exotic felids. The researchers used several tests to evaluate the nutrients in meat from bison, cattle, horses and elk.

To test how the different diets affected cats, the researchers collected blood serum and fecal samples from domestic cats and captive African wildcats, jaguars and Malayan tigers. The researchers also used cecectomized roosters to analyze amino acid digestibility in the different diets. Cecectomized roosters have had an organ called the cecum removed, which allows scientists to better analyze amino acids in their waste.

They found that raw meat diets met many nutrient requirements for cats, but there were some gaps. None of the diets contained the recommended levels of linoleic acid, the horsemeat did not provide the levels of arachidonic acid recommended for kittens, gestating females and lactating females.

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