Under pressure: comparing in situ and boat tagging methods using time-to-event analyses

Table 5 Cox proportional hazards models examining probability of presence for fish tagged on the boat (n = 35) at both 4 and 6 days after tagging

Days after tagging	Hazards model	AICc	ΔAICc	χ²	df	p
4	Handling time	66.00	0.00	4.17	1	0.04
	Handling time + family	67.08	1.08	5.76	2	0.06
	Tagging time	68.13	2.13	2.37	1	0.10
	Null	68.26	2.26
	Handling time + tagging time + family	68.60	2.60	6.96	3	0.07
	Tagging time + surgery count	69.12	3.12	3.79	2	0.20
	Tagging time + surgery count + family	70.64	4.64	5.06	3	0.20
	Handling time + tagging time + month + family	70.67	4.67	7.30	4	0.10
	Tagging time + surgery count + month + family	72.31	6.31	5.84	4	0.20
	Handling time + tagging time + surgery count + month + family	72.91	6.91	8.34	5	0.10
	Depth + tagging time + surgery count + month + family	74.85	8.85	5.86	5	0.30
	Depth + tagging time + surgery count + month + fish size + family	77.79	11.79	5.90	6	0.40
6	Handling time + family	77.51	0.00	8.28	2	0.02
	Handling time	77.55	0.04	5.43	1	0.02
	Handling time + month + family	78.13	0.62	10.32	3	0.02
	Month	79.66	2.15	3.22	1	0.07
	Handling time + tagging time + month + family	79.75	2.24	11.22	4	0.02
	Family + month	79.85	2.34	5.43	2	0.07
	Tagging time + month + family	80.73	3.22	6.96	3	0.07
	Null	81.06	3.55
	Tagging time + fish size + month + family	81.61	4.10	9.98	4	0.06
	Handling time + tagging time + surgery count + month + family	82.28	4.77	11.73	5	0.04
	Tagging time + surgery count + month + family	84.22	6.71	9.33	5	0.10
	Depth + tagging time + surgery count + month + family	87.07	9.56	9.36	6	0.20

Models are ranked by AICc values. All models include probability of presence as the dependent variable and list independent variables included in each individual model. p-values are from the log-rank test

ISSN: 2050-3385