This meant the bugs took four years to complete a breeding cycle.

These disrupt the breeding cycle but may take time to be effective and will need to be repeated.

Ideal conditions allowed the fleas' eggs to hatch quickly and escalated the breeding cycle.

Many benthic crustaceans have a non-seasonal breeding cycle, and some raise their young in a brood pouch.

They reproduce every two to three years, and only produce one or two offspring per breeding cycle.

The trio were part of a gang which stole 34,000 of livestock and equipment from a breeding farm.

Then you get volunteers thinking they're working in a conservation farm but instead it's a breeding farm for the hunting industry, and they've paid lots of money to come over.

The family also have a breeding farm that houses 500 horses.

A petition was gathered by anti-vivisectionists receiving over 28,000 signatures opposing the building of the beagle breeding farm.

He operated a horse breeding farm throughout his career.

The company's application had been rejected following a long campaign by local wildlife groups, which were concerned about the loss of breeding habitat for lapwings, skylarks and grey partridge.

With lots of stagnant water around to provide a breeding habitat, more people have been bitten than during a normal year.

Sometimes it competes with other sucker species and redhorse for breeding habitat.

The island also provides roosts and breeding habitat for a variety of seabird species.

Its breeding habitat comprises braided river systems, open paddocks and cultivated land, lake beaches, subalpine tundra and herbfields.

And now, grouped on a ridge, we look down on our prize: a large elephant breeding herd browsing the lion-dense forest.

Fifty join the breeding herd and 400 are sold for meat or to zoos as lion food.

Just ten companies account for 35 per cent of the breeding herd.

We tracked leopards in the cold, bright dawns, saw serval cats and roan antelopes and huge breeding herds of elephants, but never spotted another vehicle.

As of 2013, the center hosted 127 horses divided into 13 breeding herds and three bachelor herds.

Regular introductions of tweaked mozzies could well devastate a breeding population and prevent others from invading, but only for a while.

It said that while this did not indicate a breeding population, it did show that the pest had not been eliminated.

At the start of the century the national breeding population was down to 160 pairs.

The hope was that some of them would return and start a breeding population.

That's 11 percent above the long-term (1955-2008) average breeding population.

Kittiwakes, for example, use the bridge as a nesting site; the most inland breeding site for these ocean-travelling gulls in the world.

They believed that they had found a breeding site.

The common darter dragonfly was prospecting for a breeding site.

There may be a breeding site nearby.

It serves as a breeding site for 39,000 pairs of the birds, and supports around 10 percent of the world population.

The future lies with a combination of conventional breeding with precise gene-editing, rather than gene transplants from other species.

This will also assist efforts to produce new varieties of pea, both by genetic engineering and by conventional breeding.

So its new blackcurrant breeds are all engineered and propagated using conventional breeding methods.

No one knows how much genetic modification was involved and, as with all other new varieties of foods produced by conventional breeding, it has never been assessed for safety.

The scientists argued that crops had been artificially improved for centuries through conventional breeding techniques, which led to genetic changes.