Spawning salmon density influences fruit production of salmonberry ( Rubus spectabilis )
نویسندگان
چکیده
منابع مشابه
Exposure to high temperature influences the behaviour, physiology, and survival of sockeye salmon during spawning migration
Since 1996, some populations of Fraser River sockeye salmon (Oncorhynchus nerka Walbaum in Artedi, 1792) have begun spawning migrations weeks earlier than normal, and most perish en route as a result. We suspect that a high midsummer river temperature is the principal cause of mortality. We intercepted 100 sockeye during normal migration near a spawning stream and measured somatic energy and as...
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We studied some of the factors that might influence energy use in spawning Atlantic salmon (Salmo salar). Single females were placed into an experimental channel with either one or three males, after which spawning was monitored continuously. Male status was confirmed using genetic parentage analysis. Daily fat loss was monitored with the Torry Fish Fatmeter and validated through biochemical an...
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Phenological dynamics are controlled by environmental factors, disturbance regimes and species interactions that alter growth or mortality risk. Ecosystem engineers can be a key source of disturbance, yet their effects on the phenologies of co-occurring organisms are virtually unexplored. We investigated how the abundance of a dominant ecosystem engineer, spawning sockeye salmon (Oncorhynchus n...
متن کاملOxidative stress in Pacific salmon (Oncorhynchus spp.) during spawning migration.
The energetic and physiological challenges of spawning migrations in semelparous Pacific salmon (Oncorhynchus spp.) have been well characterized. However, the accompanying costs associated with oxidative stress during this nonfeeding migration and the potential connection to senescence have not been explored. Oxidative stress is caused by an imbalance between free radical production and absorpt...
متن کاملThe role of density-dependent and –independent processes in spawning habitat selection by salmon in an Arctic riverscape
Density-dependent (DD) and density-independent (DI) habitat selection is strongly linked to a species' evolutionary history. Determining the relative importance of each is necessary because declining populations are not always the result of altered DI mechanisms but can often be the result of DD via a reduced carrying capacity. We developed spatially and temporally explicit models throughout th...
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ژورنال
عنوان ژورنال: Ecosphere
سال: 2020
ISSN: 2150-8925,2150-8925
DOI: 10.1002/ecs2.3282