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A medieval view of fish processing, by Peter Brueghel the Elder (1556). There is evidence humans have been processing fish since the early Holocene. For example, fishbones (c. 8140–7550 BP, uncalibrated) at Atlit-Yam, a submerged Neolithic site off Israel, have been analysed. What emerged was a picture of "a pile of fish gutted and processed ...
The swim bladder, gas bladder, fish maw, or air bladder is an internal gas-filled organ that contributes to the ability of many bony fish (but not cartilaginous fish [ 1]) to control their buoyancy, and thus to stay at their current water depth without having to expend energy in swimming. [ 2] Also, the dorsal position of the swim bladder means ...
Girardoni air rifle. The Girandoni air rifle is an air gun designed by Italian inventor Bartolomeo Girandoni circa 1779. The weapon was also known as the Windbüchse ("wind rifle" in German). One of the rifle's more famous associations is its use on the Lewis and Clark Expedition to explore and map the Louisiana Purchase of 1803.
Captive bolt pistol. A captive bolt pistol (also known as a captive bolt gun, a cattle gun, a stunbolt gun, a bolt gun, a stun gun and a stunner) is a device used for the stunning of animals prior to slaughter . The goal of captive bolt stunning is to inflict a forceful strike on the forehead with the bolt in order to induce unconsciousness.
According to the Food and Agriculture Organization (FAO), a total of 156.2 million tons of fish, crustaceans, molluscs, and other aquatic animals were captured in 2011. This is a sum of 93.5 million tons of wild animals and 62.7 million tons of farmed animals. 56.8% of this total was freshwater fish, 6.4% diadromous fish, and 3.2% marine fish, with the remainder being molluscs, crustaceans ...
Sheridan Products Inc. was formed to produce Pneumatic Air Pellet Rifles with production beginning in March 1947. In the early 1940s Co-founder Ed Wackerhagen, dissatisfied with a pellet gun used by his son, set out to build one of the finest airguns in history. The design was to incorporate the philosophy: "Performance is the sum total of many ...
The white bubbles are due to the diffused air aeration system. The activated sludge process is a type of biological wastewater treatment process for treating sewage or industrial wastewaters using aeration and a biological floc composed of bacteria and protozoa. It is one of several biological wastewater treatment alternatives in secondary ...
Selenochlamys ysbryda, the ghost slug, is a species of predatory air-breathing land slug. It is a shell-less pulmonate gastropod mollusc in the family Oxychilidae, [ 2] although when first described it was assumed to be in the Trigonochlamydidae . The species was first recognised from various sites in Wales [ 3] and was formally described and ...