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Tag: "larval" at biology news

Amino acids in nectar enhance butterfly fecundity: A long awaited link

.... Butterflies raised under natural, nitrogen poor larval food conditions laid more eggs when fed nectar containing amino acids. These results provide the long missing evolutionary link between costly nectar amino acid production by plants, nectar preferences of and fitness benefits to butterflies. This ar...

New project aims to make large-scale lobster farms feasible

... need to collect larvae from the wild. The lobster larval growth cycle is extremely complicated and as yet reproduction and growth to adulthood has not been accomplished in captivity in reliable numbers. Development of collection methods to get enough larvae to support large-scale commercial culture has so...

Symbiotic bacteria protect hunting wasps from fungal infestation

...caused increased fungal infestations and increased larval mortality ?in fact, little larval survival ?suggesting that the bacteria produce antibiotics that work against pathogenic fungi. These...

Beneficial Beetles Battle Pesky Saltcedar

...happens when the insect is in its caterpillar-like larval stage or has matured into a quarter-inch-long adult beetle. Besides disrupting the natural surroundings needed by native plants, birds, fish and other forms of life, saltcedar plays havoc with farm roads and fields. For example, when rivers and stre...

University of Nevada, Reno research team discovers hormone that causes malaria mosquito to urinate

...ing a way to control insects that are pests at the larval stage, a path that has them instead potentially paving the way for better mosquito control. A potential solution to the problem of killing insects at any stage of development may be found in peptide hormones, small proteins in all animals that regul...

Hormones and growth: The control of body size and developmental growth rate in fruit flies

...y understood. Both studies examine the control of larval development in the fruit fly Drosophila. Fruit flies undergo three successive larval stages and molts before undergoing metaphorphosis and emerging as adult flies. In insects, it was pr...

Scientists find a maturity gene in fly

...named ecdysone, which is emitted by a gland as the larval stages end. When the gene was disabled, the fly la... Works: Stop Eating and Grow Up! "In insects, the larval period is exclusively devoted to growth," says Thummel. "Insects are pests because, in their larval ...

MWG Biotech expands siMAX?siRNA portfolio with new scales, lengths and design tools

...named ecdysone, which is emitted by a gland as the larval stages end. When the gene was disabled, the fly la... Works: Stop Eating and Grow Up! "In insects, the larval period is exclusively devoted to growth," says Thummel. "Insects are pests because, in their larval ...

miRNAs and musculature

...eting (Dmir-1 KO). A defect is only revealed when larval growth is initiated by feeding, which triggers paralysis and eventually death of Dmir-1 KO larvae. Analysis of the mutant larvae after feeding reveals disrupted somatic musculature, strongly suggesting a role for Dmir-1 in the maintenance of muscl...

Elusive salamanders have role in developing new sampling models

...she has extended the date of recorded residence by larval flatwoods salamanders in Fort Stewart ponds by two...s consists of field experimentation to compare the larval capture efficiency of methods in use at Fort Stewart with methods used by other researchers for othe...

Researchers find gland that tells fruit flies when to stop growing

...in, assesses the fly's size as it grows during the larval stage. The gland then sends hormonal signals when it senses the fly has reached a size appropriate to enter adulthood. The scientists found they could use the pathway that sends insulin to a fly's cells to genetically manipulate the size of the prot...

How Fruitflies Know It's Time for Lunch

...enetic analysis to gain insight into the adult and larval neural networks that use taste information to regulate eating. Specifically, they found that several types of neurons responsible for coordinating taste signals express the gene hugin (hug), a gene linked to abnormal eating activity and expressed in ...

Leading lampreys to slaughter: Pheromone for scourge of Great Lakes identified

...can be synthesized in bulk, extracts of water from larval lamprey nurseries are being used to trap adults on an experimental basis in Michigan streams. "Using these extracts has been shown to work," said Sorensen. "Capture rates are up six-fold." Most lamprey traps have been simple, rather ineffective de...

Jefferson scientists identify gene defect leading to abnormal skin development and cancer

...can be synthesized in bulk, extracts of water from larval lamprey nurseries are being used to trap adults on an experimental basis in Michigan streams. "Using these extracts has been shown to work," said Sorensen. "Capture rates are up six-fold." Most lamprey traps have been simple, rather ineffective de...

UF scientists reveal ancient origin of vertebrate skeleton

...nds the first five years of its development in the larval stage before it finally morphs into a boneless fish - is none other than collagen. This vital structural molecule is found in all vertebrates with backbones and jaws, including humans. "It was thought collagen was a relatively recent invention in ve...

Gene needed for butterfly transformation also key for insects like grasshoppers

... and is found only at the transition between their larval and pupal stages. To understand how metamorphosis evolved in insects, the UW researchers examined how the broad gene functions in direct-developing insects, which don't have a pupal stage. "We found that it is expressed throughout the nymphal stages...

UF scientists reveal ancient origin of vertebrate skeleton

...nds the first five years of its development in the larval stage before it finally morphs into a boneless fish - is none other than collagen. This vital structural molecule is found in all vertebrates with backbones and jaws, including humans. "It was thought collagen was a relatively recent invention in ve...

Thin tough skin, slow-growing gills protect larval Antarctic fish

...ty of Illinois atUrbana-Champaign say, because the larval fish of at least two species of notothenioids that...l biology. "We finally got a chance to look at the larval fish, and it seems that they don't always have to have antifreeze proteins to survive." Cziko, who ...

For the first time: Longevity modulated without disrupting life-sustaining function

...in worms, they lived longer than normal, but their larval development and reproduction were disrupted. "So,...ong life with fewer progeny and a tendency to halt larval development and enter a dormant, hibernation-like stage in which they can hang on for months but don...

Even fish don't swim well when they're young!

... fish more than 99% of the mortality occurs in the larval stage so anything that might explain what holds them back is useful". Müller will present her research on Monday 3rd April, at the Society for Experimental Biology's Annual Main Meeting in Canterbury [session A5]. The 'burst-and-coast' method of swi...

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