TABLE 2.

Results of Welch two sample t tests to evaluate the effects of collection date and whether or not embryos were collected from females placed in enclosures.

Variable	Group mean		t	df	p
Date of collection	Early	Late
Age (days)	19.78	25.65	−5.46	73.3	6.26 × 10−7
Stage a	41.83	43.89	−5.34	67.1	1.20 × 10−6
Mass (mg)	5.66	5.74	−0.26	20.1	.79
Enclosure	Yes	No
Age	23.91	18.95	−4.44	99.7	2.36 × 10−5
Stage	41.56	43.23	−4.40	109.5	2.50 × 10−5
Mass	6.00	5.37	2.16	37.6	.037

Note: Tests evaluate embryos from four clutches collected at the Pulaski County site, with N = 160 for age and stage and N = 40 for mass.

^a Harrison (1969).