Table 3 Mean ± standard deviation, min, max, and sample sizes for calculated whole-body lipid content (% wet weight) for Fraser River Chinook Management Units measured at the Albion test fishery in 2020.

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

Sample size

28

9

72

966

473

Lipid content (%)

 Mean

12.8 ± 2.3A

12.2 ± 1.7

12.7 ± 2.3A

10.8 ± 1.8B

7.3 ± 1.6C

 Min

8.4

10.7

7.9

3.4

2.1

 Max

16.3

16.3

17.1

19.8

15.6

Energy density (kcal/kg)

 Mean

1900 ± 194

1849 ± 147

1890 ± 196

1728 ± 151

1436 ± 138

 Min

1539

1720

1487

1101

985

 Max

2200

2205

2271

2229

2143

Fork length (mm)

 Mean

660.9 ± 67.4AB

584.7 ± 70.9

658.3 ± 55.0A

638.2 ± 49.8B

671.5 ± 61.4A

 Min

507

458

484

426

493

 Max

752

734

751

826

865

Weight (kg)

 Mean

7.0 ± 2.4AB

4.8 ± 2.1

7.1 ± 1.9A

6.4 ± 1.6B

8.2 ± 2.6C

 Min

2.7

3.2

2.7

2.3

3.6

 Max

11.3

10.4

11.8

13.2

17.7

Run timing 2020

 First

2020-04-21

2020-04-22

2020-07-02

2020-07-16

2020-08-24

 50%

2020-07-13

2020-07-15

2020-08-13

2020-08-28

2020-09-21

 Last

2020-09-07

2020-08-02

2020-09-04

2020-09-29

2020-10-27

  1. Significant differences denoted by different letters (due to small sample size Spring 42 not included in analyses).