River- and Sex-Specific Annual Survival Rates of Mature Anadromous Alewife (Alosa pseudoharengus)

Table 5

Apparent annual survival rates (ϕ), total instantaneous mortality (Z), and mean expectation of future life (years) with 95% lower (LCL) and upper (UCL) confidence limits estimated using capture-mark-recapture analyses for adult alewife Alosa pseudoharengus PIT tagged and monitored during consecutive spawning runs from 2013–2019 in the La Coupe (LC), LaPlanche (LP), and Missaquash (MS) rivers, Chignecto Isthmus, Canada.

	ϕ	ϕ	ϕ	Z	Z	Z	Future life (years)	LCL	UCL
		LCL	UCL		LCL	UCL
LC	0.434	0.371	0.500	0.83	0.69	0.99	1.20	1.01	1.44
LP	0.343	0.228	0.403	1.07	0.91	1.48	0.93	0.68	1.10
MS	0.348	0.320	0.377	1.06	0.98	1.14	0.95	0.88	1.03
2014	0.336	0.304	0.370	1.09	0.99	1.19	0.92	0.84	1.01
2015	0.441	0.399	0.483	0.82	0.73	0.92	1.22	1.09	1.37
2016	0.394	0.347	0.442	0.93	0.82	1.06	1.07	0.94	1.22
2017	0.417	0.341	0.496	0.87	0.70	1.08	1.14	0.93	1.43
OVERALL	0.396	0.368	0.425	0.93	0.86	1.00	1.08	1.00	1.17

Note. Marginal means, treating each river, year or both as contributing equally to the overall mean.