Stainless Steel Barb Sea Fishing Hooks

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	1. Nice quality & good service. 2. The material is high quality. 3. OEM service is available. 4. Professional manufacturer.

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fay@pride-cnc.com

Block D, Dianlian Science Park, Matian St., Guangming District, Shenzhen 518106, China

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Latest News

What is a Sea Louse?

R. BRITTON

Last Modified Date: July 05, 2020

A sea louse is a tiny parasitic creature that attaches itself to a living host, usually a fish. There are a number of different species of sea louse, and the most problematic species infest commercial fish, both wild and farmed, such as salmon and trout. The sea louse eats the skin, blood, and mucous of the host fish.

Commercial fish farms provide the perfect breeding ground for sea lice — the plural of sea louse — because of the large numbers of host fish in a comparatively small area. This means that huge numbers of the parasite accumulate and breed rapidly, infecting large quantities of fish and continuing to multiply. Although most farmed fish are treated regularly with chemical insecticides, vast numbers of viable eggs escape the treatment as they pass beyond the farmed waters and infect wild fish. Evidence also suggests that in some areas sea lice are developing a natural resistance to available treatments. The rapidly increasing numbers of sea lice, largely due to commercial fish farms, is putting wild fish populations at serious risk.

A single female sea louse can lay up to 1,000 eggs at a time, which are released in long trailers. The eggs drift freely in the sea for several days before hatching. The newly hatched organism drifts for about 10 days before attaching to a host and beginning to feed. It is not until the sea louse matures, moving around on the host and causing huge amounts of damage, that it becomes life threatening. If left untreated, an infestation of sea lice is often fatal to the host.

These parasites are particularly dangerous to salmon or trout. It takes only a single creature to cause enough damage to kill a juvenile salmon or trout. Serious infestations cause large, open wounds or lesions on the skin and causes extensive fin damage and severe bleeding. This type of extensive damage leaves the host fish open to secondary infection and unable to regulate and sustain its temperature and balance.

If an infected wild fish returns from the sea to fresh water, the sea louse is unable to survive and it falls off the host; this allows the host fish to recover, as long as it does not pick up an infection before the wounds are healed. Although wild fish often survive if they leave the sea early, their growth rate slows; healthy salmon and trout species feed heavily in the sea and grow rapidly before returning to fresh water. A fish with a louse infestation will often return to fresh water much earlier than normal in an attempt to rid itself of the parasite. These fish miss much of the feeding time, which considerably slows their growth rate and the time it takes to reach sexual maturity. This, combined with the host fish very high mortality rate, means the sea louse has a very negative economical and environmental impact.

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