Table 1.

Offspring length (MO_lw) and mass (MO_mw) of those sighted in the breeding colony compared to those not sighted by cohort. P-values based on independent t-tests.

Cohort	MOlw				MOmw
	Mean sighted	Mean not sighted	df	P	Mean sighted	Mean not sighted	df	P
1998	110.1	107.9	154	0.012	54.6	51.6	82	0.048
1999	110.4	108.6	256	0.003	53.7	51.4	88	0.068
2000	109.8	108.0	247	0.015	51.8	50.1	94	0.263
2001	111.2	110.4	265	0.199	54.4	52.1	159	0.038
2002	112.4	110.6	250	0.002	53.3	52.6	133	0.556