NDLI: Nest site preference and intrasexual competition in female sockeye salmon, Oncorhynchus nerka

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Nest site preference and intrasexual competition in female sockeye salmon, Oncorhynchus nerka

Content Provider	Semantic Scholar
Author	Adkison, Milo D. Ward, Michael B. Quinn, Thomas P.
Copyright Year	2013
Abstract	Many ecological circumstances present individuals with a conflict between the inherent benefits of a particular habitat and the costs incurred in acquiring or retaining use of the habitat in the face of competition. For example, the reproductive biology of female Pacific salmon (Oncorhynchus spp.) led us to hypothesize that female nest site choice should reflect a compromise between the benefits of obtaining a high quality nest site and the cost of competing for and defending it. To test this hypothesis we studied female sockeye salmon (O. nerka) spawning on beaches in Iliamna Lake, Alaska using a combination of snorkel surveys, tagging, behavior observations, and models. Females showed spatial preferences in nest site selection (for shallower water, where water circulation was higher), aggressive competition in preferred areas was higher, and there was evidence for costs associated with this increased competition. Over the course of the season, spawning activity shifted from shallower to deeper water, consistent with a tradeoff between benefits for embryo survival associated with shallow sites and the costs of competing for them. However, it was also consistent with date-specific optimal sites related to the probability of embryo mortality for eggs spawned in shallow water late in the season, due to annual cycles in lake level and temperature.
Starting Page	385
Ending Page	399
Page Count	15
File Format	PDF HTM / HTML
DOI	10.1007/s10641-013-0159-x
Volume Number	97
Alternate Webpage(s)	https://doc-08-1o-docs.googleusercontent.com/docs/securesc/ha0ro937gcuc7l7deffksulhg5h7mbp1/s95mks7g17cr96b4797l3kfb9b5sdb2s/1541347200000/05139430942857919412/*/0B_sa2AnC9DW4VHhCVmdqNWlnZHc?e=download
Journal	Environmental Biology of Fishes
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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