Krill fishery

Krill fishery is the profitable fishery of krill, small shrimp-like marine animals that live in the oceans world-wide. Estimates for how much krill there is vary wildly, depending on the methodology used. They range from 125–725 million tones of biomass globally. The total global harvest of krill from all fisheries amounts to 150 – 200,000 tones annually, mainly Antarctic krill (Euphausia superb) and North Pacific krill (E. Pacifica).

Krill are rich in protein (40% or more of dry weight) and lipids (about 20% in E. superb). Their exoskeleton amounts to some 2% of dry weight of chitin. They also contain traces of a wide array of hydrolytic enzymes such as proteases, carbohydrates, nucleases and phospholipids, which are intense in the digestive gland in the cephalothoraxes of the krill.

Pollination

Pollination is an important step in the reproduction of seed plants: the transfer of pollen grains (male gametes) to the plant carpel, the organization that contains the ovule (female gamete). The accessible part of the carpel is called a stigma in the flowers of angiosperms and a micro Pyle in gymnosperms. The study of pollination brings mutually many disciplines, such as botany, horticulture, entomology, and ecology. Pollination is significant in horticulture because most plant fruits will not develop if the ovules are not fertilized. The pollination process as communication between flower and vector was first addressed in the 18th century by Christian Konrad Sprengel.

Stratosphere

From the Latin word "stratus" meaning a scattering out. The stratosphere extends from the troposphere's 7 to 17 km (23,000 – 60,000 ft) range to about 50 km (160,000 ft). Temperature in crease through height. The stratosphere contains the ozone layer, the division of the Earth's atmosphere which contains comparatively high concentrations of ozone. "Relatively high" means a few parts per million—much higher than the concentrations in the lower atmosphere but still small compare to the main components of the atmosphere. It is frequently located in the lower portion of the stratosphere from approximately 15 to 35 km (50,000 – 115,000 ft) above Earth's surface, although the thickness varies seasonally and geographically.