[MARINE_BIOLOGY_INTERNATIONAL] DIE-OFF, CARP - USA: (MICHIGAN)

 

DIE-OFF, CARP - USA: (MICHIGAN)
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Date: Mon 20 Jun 11
Source: WHMI radio [edited]
<http://whmi.com/news/article/12517>

Large number of dead carp reported at Kensington Metropark
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A large number of carp have died at Kent Lake in Kensington Metropark. Kensington is part of the Huron-Clinton Metropark system and park patrons and local listeners have reported seeing large numbers of dead carp floating in the water and all over the shores.

Officials tell WHMI that they are working with the Michigan Department of Natural Resources on the issue. Communication specialist Denise Semion says the fish kill could be from spawning stress and a rapid rise in water temperature or from other causes, such as a virus that affects mostly carp. Semion says they will be meeting with the DNR and will provide more information once that happens but in the meantime, visitors may see dead carp in the lake.

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[The summer temperatures have caused the water temperatures to rise above the comfort level of fish that are stressed due to spawning.

Koi herpesvirus (KHV), also known as cyprinid herpesvirus-3 or CyHV-3, is a highly contagious viral disease capable of causing significant morbidity and mortality in common carp (_Cyprinus carpio_). In many countries, the common carp is a food fish and also has been selectively bred for the ornamental fish industry, where it is known as koi.

The most significant sign of KHV is the sudden appearance of mass mortality within 1 and 2 days of initial infection. Aside from mass mortality, the other common signs are white patches or necrosis of the gills. Other clinical signs are sunken eyes, bleeding gills, and secondary bacterial infection or parasite infestation.

The article does not provide much information, with the exception that carp seem to be the only species involved. A necropsy of some fish with appropriate laboratory testing would help determine the cause of the dead carp. - Mod.TG

The state of Michigan can be located on the HealthMap/ProMED-mail interactive map at <http://healthmap.org/r/0_ua>. - Sr.Tech.Ed.MJ]

[see also:
2010
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Undiagnosed fish die-off - USA (02): (NJ) koi herpesvirus susp.
20100528.1773
Koi herpesvirus, carp - USA: (CA) 20100523.1707
2009
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Koi herpesvirus, carp - USA: (AZ) 20090703.2395 Koi herpesvirus disease - USA (AZ) 20090613.2186
2006
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Koi herpesvirus - USA (TX) 20060707.1867] .................................................sb/tg/mj/sh/ll
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