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Full-Text Articles in Life Sciences
Spawning Salmon Disrupt Trophic Coupling Between Wolves And Ungulate Prey In Coastal British Columbia, Chris T. Darimont, Paul C. Paquet, Thomas E. Reimchen
Spawning Salmon Disrupt Trophic Coupling Between Wolves And Ungulate Prey In Coastal British Columbia, Chris T. Darimont, Paul C. Paquet, Thomas E. Reimchen
Nonindigenous Pests and Biological Invasions Collection
Background: As a cross-boundary resource subsidy, spawning salmon can strongly affect consumer and ecosystem ecology. Here we examine whether this marine resource can influence a terrestrial wolf-deer (Canis lupus-Odocoileus hemionus) predator-prey system in coastal British Columbia, Canada. Data on resource availability and resource use among eight wolf groups for three seasons over four years allow us to evaluate competing hypotheses that describe salmon as either an alternate resource, consumed in areas where deer are scarce, or as a targeted resource, consumed as a positive function of its availability. Faecal (n = 2203 wolf scats) and isotopic analyses (n = 60 …
Behavioural Interactions Between The Introduced Plague Minnow Gambusia Holbrooki And The Vulnerable Native Australian Ornate Rainbowfish Rhadinocentrus Ornatus, Under Experimental Conditions, K. Keller, C. Brown
Sentience Collection
The impact of the plague minnow Gambusia holbrooki on the ornate rainbowfish Rhadinocentrus ornatus was investigated by comparing the behavioural response and microhabitat preferences of populations of R. ornatus collected from locations that are sympatric and allopatric with G. holbrooki. Rhadinocentrus ornatus populations from sympatric areas exhibited a significantly higher frequency of intraspecific chases, spent significantly more time at an intermediate depth and were nipped significantly less often by G. holbrooki compared to the allopatric R. ornatus populations. The frequency of intraspecific chases by all R. ornatus populations were greatest immediately following G. holbrooki exposure and increased further with repeated …