pdf Population Structure and Genetic Stock Identification of Trout (Salmo trutta) of the Middle Shannon and Lough Ree Catchments INTERIM REPORT Popular

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Population Structure and Genetic Stock Identification of Trout (Salmo trutta) of the Middle Shannon and Lough Ree Catchments INTERIM REPORT

Population Structure and Genetic Stock Identification of Trout (Salmo trutta) of the Middle Shannon and Lough Ree Catchments

INTERIM REPORT

In 2014, IFI in collaboration with Queen’s University Belfast (QUB) began a three-year research programme to examine the genetic diversity of brown trout in the Middle Shannon and Lough Ree Catchments, in tandem with two other catchments. The Middle Shannon and Lough Ree Catchments include two of the River Shannon’s largest sub-catchments’ (River Inny and River Suck), one of its three largest lakes (Lough Ree) and three other lakes which are regarded as important brown trout fisheries (Loughs’ Owel, Ennell, Derravaragh and Sheelin). Genetic profiling of the trout stocks has already been completed on the Lough Sheelin subcatchments (in press) and on Lough Ennell (Massa Gallucci and Mariani, 2011).

The main objectives of the middle Shannon and Lough Ree study were:

  • To investigate if there are a number of discrete genetic stocks of brown trout within the Middle Shannon and Lough Ree catchments.
  • To understand how important each genetic group is to the fishery.
  • Examine the behaviour and other processes occurring within individual populations and between populations over their life span.
  • Estimate the percentage contribution of the various sub-catchments to the adult brown trout stocks of Lough Ree and a small number of other brown trout lakes (Loughs’ Owel and Derravaragh).
  • Investigate if the River Inny and River Suck arterial drainage scheme impacted on the genetic diversity of brown trout within the Middle Shannon and Lough Ree catchment.

Preliminary results from the genetic analysis are presented in this report. A final report will be available mid 2017.