Tag Archives: Freshwater survival

Babine River Sockeye Migration and Predation Assessment

Lake Babine Nation Fisheries (LBNF) plans to work with Fisheries and Oceans Canada (DFO) to continue the investigation of the behaviour and ecology of Babine River sockeye fry. The proposed project is composed of four relatively discrete components which include:

  1. early life history behaviour and migration;
  2. extent and rate of predation on juvenile sockeye;
  3. egg-to-fry and fry-to-smolt survival, frequency of occurrence of disease and parasites and condition as a function of length and weight; and
  4. presence and behaviour of sockeye fry rearing in downstream slow water habitats to obtain evidence of a riverine juvenile sockeye ecotype.

Other observed adverse effects that may affect sockeye fry survival and overall sockeye production will be documented. These studies are intended to address the diminished abundance of Late Run Upper and Lower Babine River sockeye in their juvenile freshwater environment.



Babine Lake Sockeye Smolt Enumeration – Mark-Recapture

The Lake Babine Nation Fisheries Department (LBNF), in collaboration with the DFO, propose to build on success in the smolt project by continuing to operate the Babine smolt enumeration facilities to provide sockeye smolt emigration estimates and smolt fitness data for the Babine Lake Watershed. Smolt production and fitness are effective indicators of Babine Lake ecosystem health which can be used to initiate and direct resource management initiatives intended to protect the Babine Lake watershed. We believe that continuous data from the Babine smolt enumeration fence would provide important information on Babine sockeye population status that will contribute critical information to the understanding the large inter-annual variations in returns observed in the past two decades. An uninterrupted set of sockeye smolt population data over multiple years will help address one of the most fundamental questions of salmon stocks management — under which conditions are freshwater or marine environments the primary driver determining salmon returns?