Table 1 Four indices of migration difficulty for Fraser Chinook salmon.

From: Seasonal variation in the lipid content of Fraser River Chinook Salmon (Oncorhynchus tshawytscha) and its implications for Southern Resident Killer Whale (Orcinus orca) prey quality

 

Spring 52

Spring 42

Summer 52

Summer 41

Fall 41

Mean elevation (m)

713

570

606

350

93

Mean distance (km)

994

392

705

523

112

Mean work

712.9

223.6

464.9

186.5

11.3

Mean slope

375.3

726.2

426.1

341.9

409.3

  1. Mean elevation (m) and distance from freshwater entry (km) of spawning ground, work [(elevation × distance)/1000] and slope (elevation/distance) × 500. Data used to determine elevation and migration distance taken from the literature64,65,66,67,68,69,70.
Back to article page