Table 1.

Statistical comparisons among median TTMs and metamorphosis rates for each treatment in laboratory-based experiments for five crab species. (***Asterisks indicate a significant difference in TTMs between treatments (p < 0.05, Kruskal–Wallis test).)

species	total no. individuals (n)	treatment (habitat)	variance within replicates	variance among replicates	median TTM (hour)	H-statistic	p-value	metamorphosis rate
H. sexdentatus	24	North Reef	462.6	57.9	58	34.0	<0.001***	8.1
	24	Mahurangi Harbour	639.2	37.7	74			6.8
	24	Pakiri Beach	735.2	31.9	105			6.7
	24	silent	760.5	2.7	105			6.8
Cyclograpsus lavauxi	24	North Reef	182.4	112.0	39	13.6	0.004***	11.4
	24	Mahurangi Harbour	291.0	63.4	48			9.5
	24	Pakiri Beach	336	13.0	69			9.9
	24	silent	304	183	72			9.1
Cymo andreossyi	30	Coconut Reef	336.1	0.4	66	35.5	<0.001***	9.4
	30	Horseshoe Reef	370.1	14.9	78			8.9
	30	Lagoon	405.5	0.4	96			7.9
	30	silent	437.5	26.8	99			8.5
S. aspera	15	Coconut Reef	415.9	13.4	36	25.4	<0.001***	20
	15	Horseshoe Reef	426.9	9.5	42			14.7
	15	Lagoon	436.7	1.4	54			13.8
	15	silent	306	32.2	54			10.2
G. tenuicrustatus	10	Coconut Reef	415.9	13.4	54	47.9	<0.001***	8.9
	10	Horseshoe Reef	432.3	88.7	72			8.3
	10	Lagoon	543.3	20.6	96			8.7
	10	silent	306	32.2	102			9.6