Seasonal and interpopulational variability in fecundity, egg size, and elemental composition (CHN) of eggs and larvae in a grapsoid crab, Chasmagnathus granulatus

Table 2 Chasmagnathus granulatus

Variable	Factor	df effect	MS effect	df error	MS error	F	P-level
Egg dry mass (μg)	Population	1	119.8170	52	0.323969	369.8409	0.000000*
	Time	1	32.1540	52	0.323969	99.2503	0.000000*
	Population × time	1	3.2422	52	0.323969	10.0079	0.002603*
Larva dry mass (μg)	Population	1	125.5280	34	0.680471	184.4722	0.000000*
	Time	1	30.2489	34	0.680471	44.4529	0.000000*
	Population × time	1	1.9378	34	0.680471	2.8477	0.100662
Egg volume (mm³)	Population	1	0.000231	26	0.000001	329.8146	0.000000*
	Time	1	0.000064	26	0.000001	92.0329	0.000000*
	Population × time	1	0.000007	26	0.000001	10.2023	0.003656*
Larva volume (mm³)	Population	1	0.000724	28	0.000014	52.95454	0.000000*
	Time	1	0.000260	28	0.000014	18.99485	0.000160*
	Population × time	1	0.000023	28	0.000014	1.65606	0.208674

Two-way ANOVA comparing dry mass and volume of eggs and larvae between Mar Chiquita and San Antonio populations, time (beginning versus end of reproductive seasons; data from beginning pooled from seasons 2002–2003 and 2003–2004); interaction between these factors
*Significant values of P (α = 0.05)

ISSN: 1438-3888