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Electrofishing. Scientists carrying out a population and species survey using electrofishing equipment. Electrofishing is a fishing technique that uses direct current electricity flowing between a submerged cathode and anode. This affects the movements of nearby fish so that they swim toward the anode, where they can be caught or stunned.
This 16th-century fish stall shows many traditional fish products. The term fish processing refers to the processes associated with fish and fish products between the time fish are caught or harvested, and the time the final product is delivered to the customer. Although the term refers specifically to fish, in practice it is extended to cover ...
Fish preservation is the method of increasing the shelf life of fish and other fish products by applying the principles of different branches of science in order to keep the fish, after it has landed, in a condition wholesome and fit for human consumption. [1][2] Ancient methods of preserving fish included drying, salting, pickling and smoking.
P. zijsron. Binomial name. Pristis zijsron. Bleeker, 1851. The longcomb sawfish, narrowsnout sawfish or green sawfish (Pristis zijsron) is a species of sawfish in the family Pristidae, found in tropical and subtropical waters of the Indo-West Pacific. It has declined drastically and is now considered a critically endangered species. [1][3][4][5]
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 ...
A 1.3 m (4.3 ft) sawfish had a 33 cm (13 in) catfish in its stomach. [71] It had been suggested that sawfish use their saw to dig/rake in the bottom for prey, [79] but this was not observed during a 2012 study, [74] or supported by later hydrodynamic studies. [77] Large sawfish often have rostral teeth with tips that are notably worn. [35]
Pristis perotteti J. P. Müller & Henle, 1841. The largetooth sawfish (Pristis pristis, syn. P. microdon and P. perotteti) is a species of sawfish in the family Pristidae. It is found worldwide in tropical and subtropical coastal regions, but also enters freshwater. It has declined drastically and is now critically endangered. [1][3][4]
A 52 mm (2.0 in) hole saw with pilot bit. A 115 mm (4.5 in) diamond hole saw. A hole saw (also styled holesaw ), also known as a hole cutter, [ 1] is a saw blade of annular (ring) shape, whose annular kerf creates a hole in the workpiece without having to cut up the core material. It is used in a drill. Hole saws typically have a pilot drill ...