Reproductive success of jack and full-size males in a wild coho salmon population.

Autor:	King EM; College of Fisheries and Ocean Sciences, University of Alaska, 17101 Point Lena Loop Road, Juneau, AK 99801, USA., Tallmon DA; College of Fisheries and Ocean Sciences, University of Alaska, 17101 Point Lena Loop Road, Juneau, AK 99801, USA.; Biology and Marine Biology Program, University of Alaska Southeast, 11066 Auke Lake Way, Juneau, AK 99801, USA., Vulstek SC; National Oceanic and Atmospheric Administration, 17109 Point Lena Loop Road, Juneau, AK 99801, USA., Russell JR; National Oceanic and Atmospheric Administration, 17109 Point Lena Loop Road, Juneau, AK 99801, USA., McPhee MV; College of Fisheries and Ocean Sciences, University of Alaska, 17101 Point Lena Loop Road, Juneau, AK 99801, USA.
Jazyk:	angličtina
Zdroj:	Royal Society open science [R Soc Open Sci] 2023 Apr 05; Vol. 10 (4), pp. 221271. Date of Electronic Publication: 2023 Apr 05 (Print Publication: 2023).
DOI:	10.1098/rsos.221271
Abstrakt:	Despite the wealth of research on Pacific salmon Oncorhynchus spp. life histories there is limited understanding of the lifetime reproductive success of males that spend less time at sea and mature at a smaller size (jacks) than full-size males. Over half of returning male spawners can be jacks in some populations, so it is crucial to understand their contribution to population productivity. We quantified adult-to-adult reproductive success (RS) of jacks and their relative reproductive success (RRS) compared to full-size males in a wild population of coho salmon in the Auke Creek watershed, Juneau, Alaska. We used genetic data from nearly all individuals (approx. 8000) returning to spawn over a decade (2009-2019) to conduct parentage analysis and calculate individual RS. The average adult-to-adult RS of jacks (mean = 0.7 and s.e. = 0.1) was less than that of full-size males (mean = 1.1 and s.e. = 0.1). Jack RRS was consistently below 1.0 but ranged widely (0.23 to 0.96). Despite their lower average success, jacks contributed substantially to the population by siring 23% of the total returning adult offspring (1033 of 4456) produced between 2009 and 2015. Our results imply that jacks can affect evolutionary and population dynamics, and are relevant to the conservation and management of Pacific salmon. Competing Interests: We declare no competing interests. (© 2023 The Authors.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu