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Asian Clam Invasive Species Found in Longford

11th September 2014
Asian Clam Invasive Species Found in Longford

#asianclam – Inland Fisheries Ireland has prohibited angling at the 'hotwater' stretch in Lanesborough, Co. Longford. This emergency response it due to the confirmation of the presence of Asian Clam, Corbilcula fluminea, downstream of the ESB powerplant at the top of Lough Ree. Inland Fisheries Ireland has deployed a rapid response team to erect signs in the location prohibiting angling on this fishery until further notice.

Anglers must be aware of the dangers posed to other waters. Asian clam can spread on fishing equipment such as keep nets, landing nets, boats, rods and clothing. A decision has been made to close this section of the fishery as a temporary measure to avoid the accidental spread of Asian Clam to other waters. The fishery will reopen at the earliest opportunity once bio-security measures for anglers can be introduced. These measures will include disinfection facilities for all angling equipment.

Inland Fisheries Ireland officers received a report this morning, Thursday 11th September 2014, and responded immediately to the popular fishing area. Dr. Joe Caffrey, a Senior Research Officer with Inland Fisheries Ireland, attended the location also and confirmed the presence of the invasive species this afternoon. An initial assessment further downstream did not show signs of a presence of the invasive. A full assessment will be carried out and a meeting is scheduled to take place on Monday 15th September between the relevant agencies to agree the next steps, to ensure that there no further spread towards Lough Ree occurs.

Like the Zebra Mussel (Dreissena polymorpha), Asian Clam has the ability to become highly invasive in a short period of time and at high densities it can alter the food web and compete with native mussel species. Asian clam are known to aggressively out compete native invertebrate communities, limit phytoplankton biomass, biofoul water intakes, alter benthic habitats, add biologically available nitrogen and phosphorus to systems, and impact aesthetic and recreational values of public beaches, lake front properties and swimming areas. Their high rates of filtration, metabolism, reproduction, tolerance to wide ranges of habitats, and juvenile dispersal allows Asian clam to aggressively expand ranges and to rapidly re‐invade areas; limiting management, reducing restoration efforts and impacting native benthic communities. Asian clam are capable of both filter feeding (feeding from the water) and pedal feeding (feeding directly from the sediment).

A fish stock survey carried out by Inland Fisheries Ireland on Lough Ree in March 2014 also included grab sampling for the Asian Clam invasive in 200 sites over the entire lake. No Asian Clam was found at that time.Asian Clam invasive species found in Longford – Angling prohibited until further notice

Inland Fisheries Ireland has prohibited angling at the 'hotwater' stretch in Lanesborough, Co. Longford. This emergency response it due to the confirmation of the presence of Asian Clam, Corbilcula fluminea, downstream of the ESB powerplant at the top of Lough Ree. Inland Fisheries Ireland has deployed a rapid response team to erect signs in the location prohibiting angling on this fishery until further notice.

Anglers must be aware of the dangers posed to other waters. Asian clam can spread on fishing equipment such as keep nets, landing nets, boats, rods and clothing. A decision has been made to close this section of the fishery as a temporary measure to avoid the accidental spread of Asian Clam to other waters. The fishery will reopen at the earliest opportunity once bio-security measures for anglers can be introduced. These measures will include disinfection facilities for all angling equipment.

Inland Fisheries Ireland officers received a report this morning, Thursday 11th September 2014, and responded immediately to the popular fishing area. Dr. Joe Caffrey, a Senior Research Officer with Inland Fisheries Ireland, attended the location also and confirmed the presence of the invasive species this afternoon. An initial assessment further downstream did not show signs of a presence of the invasive. A full assessment will be carried out and a meeting is scheduled to take place on Monday 15th September between the relevant agencies to agree the next steps, to ensure that there no further spread towards Lough Ree occurs.

Like the Zebra Mussel (Dreissena polymorpha), Asian Clam has the ability to become highly invasive in a short period of time and at high densities it can alter the food web and compete with native mussel species. Asian clam are known to aggressively out compete native invertebrate communities, limit phytoplankton biomass, biofoul water intakes, alter benthic habitats, add biologically available nitrogen and phosphorus to systems, and impact aesthetic and recreational values of public beaches, lake front properties and swimming areas. Their high rates of filtration, metabolism, reproduction, tolerance to wide ranges of habitats, and juvenile dispersal allows Asian clam to aggressively expand ranges and to rapidly re‐invade areas; limiting management, reducing restoration efforts and impacting native benthic communities. Asian clam are capable of both filter feeding (feeding from the water) and pedal feeding (feeding directly from the sediment).

A fish stock survey carried out by Inland Fisheries Ireland on Lough Ree in March 2014 also included grab sampling for the Asian Clam invasive in 200 sites over the entire lake. No Asian Clam was found at that time.

Published in Angling
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