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Table 1 Summary of results testing for differences between various groups.

From: Intraspecific divergence in sperm morphology of the green sea urchin, Strongylocentrotus droebachiensis: implications for selection in broadcast spawners

 

Measure

Year

Spawn

Pacific

West Atlantic

East Atlantic

Pop

 

F

P

t

P

F

P

F

P

F

P

F

P

F

P

HL

0.55

0.46

1.22

0.2287

2.32

0.09777

8.27

<0.0001

11.23

<0.0001

44.47

<0.0001

36.48

<0.0001

HW

0.46

0.50

3.88

0.0005

7.31

0.00097

5.4

<0.0001

25.76, 9.13

<0.0001, <0.0001

15.82

<0.0001

23.61

<0.0001

AL

0.04

0.84

-0.56

0.5765

0.61

0.61723

8.86

<0.0001

10.98

<0.0001

4.51

0.0008

8.43

0.0005

TOTAL

0.00

0.98

-0.53

0.598

0.95

0.42989

6.79

<0.0001

10.36

<0.0001

4.4

0.001

2.9

0.0612

MA

3.62

0.06

2.45

0.0194

4.84

0.008

13.23

<0.0001

12.5

<0.0001

0.76

0.5789

8.15

<0.0001

  1. Results for trait differences between measurement events (Measure), 2006 and 2007 West Atlantic sperm traits (Year), among spawnings within an individual (Spawn), among individuals within populations (Pacific, West Atlantic, East Atlantic), and among populations (Pop). For HW, individual differences within West Atlantic reported for 2006 and 2007, respectively, and Pop reflects separate accounting for the West Atlantic population by year. Sperm traits are head length (HL), head width (HW), axoneme length (AL), total length (TOTAL), midpiece area (MA).