Changes

==Sea Lice==

==Sea Lice==

[[Image:Sea Lice.jpg|right|thumb|200px|Sea Lice - Copyright Joseph G. Kunkel at The Kunkel Fish & Aquatic Invert Site]]

[[Image:Sea Lice.jpg|right|thumb|200px|Sea Lice - Copyright Joseph G. Kunkel at The Kunkel Fish & Aquatic Invert Site]]

*Economic imortance to the fish farming industries

*Economic importance to the fish farming industries

**Especially in North American and in Northern Europe

**Especially in North American and in Northern Europe

*''Lepeophtheirus'' is found only the Northern hemisphere

*''Lepeophtheirus'' is found only in the Northern hemisphere

*''Caligus'' is found worldwide

*''Caligus'' is found worldwide

'''Control'''

'''Control'''

*Ectoparasites

*Ectoparasiticides

*Hidden antigen vaccine

*Hidden antigen vaccine

*Wrasse which feed on sealice

*Wrasse which feed on sealice

*Managment improvements

*Management improvements

**E.g. ''All in, all out'' and 6 week fallowing

**E.g. ''All in, all out'' and 6 week fallowing