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Table 1 Population structure of rainbow trout

From: Genetic (co)variance of rainbow trout (Oncorhynchus mykiss) body weight and its uniformity across production environments

 

Subpopulation I

Subpopulation II

 

1996

1999

1997

2000

Number of parents and families

Sires, dams

57, 129

37, 94

65, 79

95, 121

Sires per dam, mean (range)

1.00 (1-1)

1.00 (1-1)

2.41 (1-3)

1.63 (1-3)

Dams per sire, mean (range)

2.26 (1-4)

2.54 (1-4)

2.93 (1-5)

2.06 (1-5)

Full-sib families, family tanks

129, 129

94, 135

191, 259

197, 197

Number of fish with records

Freshwater nucleus station

4994

3084

8099

5998

Fish per full-sib family

38.7

32.8

42.4

30.4

Seawater station

2573

2442

8351

7499

Fish per full-sib family

19.9

26.0

43.7

38.1