Table 4 Comparison between treatments of the number (%) of embryos to die at each of Leslie et al.’s²⁸ four developmental stages.

Nesting tactic	Stage	Control	3-day	3.5-day	4-day	8-day	15-day	30-day
Non-arribada	0	7 (32%)	1 (13%)	20 (44%)	10 (30%)	28 (52%)	52 (100%)	54 (100%)
	1	2 (9%)	0 (0%)	5 (11%)	2 (6%)	5 (9%)	0 (0%)	0 (0%)
	2	2 (9%)	1 (13%)	5 (11%)	5 (15%)	6 (11%)	0 (0%)	0 (0%)
	3	11 (50%)	6 (75%)	15 (33%)	16 (48%)	15 (28%)	0 (0%)	0 (0%)
Treatment comparison*		A	A	A	A	A	A	A
Total number of eggs^#		69	51	54	53	54	52	54
Number failed to hatch (%)		22 (32%)	8 (16%)	45 (83%)	33 (62%)	54 (100%)	52 (100%)	54 (100%)
Arribada	0	12 (32%)	17 (52%)	31 (78%)	24 (71%)	24 (67%)	25 (76%)	42 (100%)
	1	8 (21%)	6 (18%)	6 (15%)	2 (6%)	3 (8%)	1 (3%)	0 (0%)
	2	7 (18%)	6 (18%)	0	8 (24%)	1 (3%)	1 (3%)	0 (0%)
	3	11 (29%)	4 (12%)	3 (8%)	0 (0%)	8 (22%)	6 (18%)	0 (0%)
Treatment comparison*		A	A	AB	AB	AB	AB	B
Total number of eggs^#		47	44	42	41	42	41	42
Number failed to hatch (%)		38 (81%)	33 (75%)	40 (95%)	34 (83%)	36 (86%)	33 (81%)	42 (100%)

Olive ridley eggs were collected from non-arribada and arribada nesting females and incubated following different durations of post-oviposition hypoxia.
*When letters above each bar are the same, there was no significant between-group difference in hatching success (Bonferroni corrected Chi-squared test with 21 pair-wise comparisons; p ≤ 0.05).
^#Total number of eggs per treatment excludes those deliberately opened for staging.

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