Sentences with phrase «guppies lived»

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Studies in the wild and the lab have mostly supported this idea, but guppies living in waterfall - strewn streams in Trinidad seem to buck the theory.

Not exact matches

Studying the fish in their native habitats in Venezuela and Trinidad, he realized the guppies that lived in the pools below waterfalls tended to have very dull coloration.

But intelligence does matter to the tropical fish, as big - brained guppies outwit predators to live longer than slower witted peers.

But whatever the explanation, he has always suspected that smell must be important for these fish and he's pleased that this new side of the guppy's sex life has finally been revealed.

Live birth also occurs in some non-mammalian species, such as guppies and hammerhead sharks; thus it is not a distinguishing characteristic of mammals.

Researchers in Hawaii found that guppies released in the 1920s drove down native fish populations, perhaps by competing with them for food and living space, and had likely changed the cycle of nutrients in water: Guppy - rich areas showed increased levels of dissolved nitrogen — from ammonium in fish urine and gill excretions — which, in turn, stimulated algae growth.

Led by Dr. Gregor Rolshausen, then a postdoctoral researcher at McGill working with Prof. Andrew Hendry, the team went to study the guppy fish living in polluted areas, comparing their morphology and genetic makeup to those of similar guppies from non-polluted parts of Trinidad.

Unlike the majority of fish in which females lay eggs that are later fertilized by males, live - bearers — which include species such as mollies, platies, guppies, swordtails and mosquitofish — have internal fertilization.

But new studies of guppies suggest that we need more sophisticated theories to describe how evolution shapes life span.

The latest salvo in Macro-Nutrient Land is the Calorie Restriction Diet, inspired by animal experiments in which mice, guppies, water fleas, yeast, spiders, Labrador retrievers, a microscopic water invertebrate called the rotifer, and rhesus monkeys are said to live longer on diets that restrict caloric intake.13 Researchers are encouraged by the longevity of a single monkey who has reached 38 years on a diet in which the portion of monkey chow — dried compressed pellets of wheat, corn, soybean, alfalfa, fish and brewer's yeast — has been cut by 30 percent compared to controls.

Looks like it should be chasing guppies or salmon or sharks, not taking kids to school, which is its proper place in life.

Turtles also can be prompted to exercise by feeding them live fish, such as goldfish and guppies, which they have to catch to consume.

But, as we stood on the shore at Hawks Nest, near where she used to live, I pointed out landmarks from tales I'd told the kids about my childhood — there's the sandbank where Aunty Kathryn cut her foot... here's where we caught guppies in buckets... those little balls of sand are made by the crabs digging... Nana Peg would wake us at 6 am to swim in the king tides, the water would go right up to those boats resting on the grass... my great - grandmother lived on a houseboat that was beached just over there...»

We stood on the shore at Hawks Nest, near where she used to live, and I pointed out landmarks from tales I'd told the kids about my childhood — there's the sandbank where Aunty Kathryn cut her foot... here's where we caught guppies in buckets... those little balls of sand are made by the crabs digging... Nana Peg would wake us at 6 am to swim in the king tides, the water would go right up to those boats resting on the grass... my great - grandmother lived on a houseboat that was beached just over there...»

We stood on the shore and I pointed out landmarks from tales I've told the kids about my childhood — there's the sandbank where Aunty Kathryn cut her foot... here's where we caught guppies in buckets... those little balls of sand are made by the crabs digging... Nana Peg would wake us at 6 am to swim in the king tides, the water would go right up to those boats resting on the grass... my great - grandmother lived on a houseboat that was beached just over there...