Predation on Pacific salmonid eggs and carcass's by subyearling Atlantic salmon in a tributary of lake Ontario

Evidence of energy and nutrient transfer from invasive pink salmon (Oncorhynchus gorbuscha) spawners to juvenile Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) in northern Norway

“…This may provide an indication of the size range of juvenile Atlantic salmon and brown trout capable of feeding on pink salmon eggs in northern Norwegian rivers. However, subyearling Atlantic salmon as small as 70 mm long consumed the eggs of introduced Pacific salmon (Chinook, coho and steelhead salmon) that ranged between 5.3 and 7.2 mm in diameter in Salmon River, NY (Johnson et al, 2016).…”

“…have been introduced (Johnson et al, 2016). In a tributary of Salmon River (NY), juvenile Atlantic salmon and brown trout, species native to the tributaries of the Great Lakes, were observed to feed on Pacific salmon eggs (Johnson et al, 2016;Johnson & Ringler, 1979;Stauffer, 1971).…”

“…have been introduced (Johnson et al, 2016). In a tributary of Salmon River (NY), juvenile Atlantic salmon and brown trout, species native to the tributaries of the Great Lakes, were observed to feed on Pacific salmon eggs (Johnson et al, 2016;Johnson & Ringler, 1979;Stauffer, 1971). Age-2 and older brown trout fed heavily on coho salmon eggs in the fall (Stauffer, 1971) and eggs constituted >90% of the diets of young brown trout (Johnson & Ringler, 1979).…”

“…There is considerable evidence of stream-resident salmonids feeding on Pacific salmon eggs from the Pacific Northwest United States (Bilby et al, 1998;Wipfli, 2009), Alaska (Denton et al, 2010;Scheuerell et al, 2007), and the North American Great Lakes, where pink, Chinook (Oncorhynchus tshawytscha), and coho salmon (O. kisutch) have been introduced (Johnson et al, 2016). In a tributary of Salmon River (NY), juvenile Atlantic salmon and brown trout, species native to the tributaries of the Great Lakes, were observed to feed on Pacific salmon eggs (Johnson et al, 2016;Johnson & Ringler, 1979;Stauffer, 1971). Age-2 and older brown trout fed heavily on coho salmon eggs in the fall (Stauffer, 1971) and eggs constituted >90% of the diets of young brown trout (Johnson & Ringler, 1979).…”

“…Age-2 and older brown trout fed heavily on coho salmon eggs in the fall (Stauffer, 1971) and eggs constituted >90% of the diets of young brown trout (Johnson & Ringler, 1979). Further studies in tributaries of Salmon River found that Pacific salmon eggs and carcass tissue represented an important dietary component to subyearling Atlantic salmon in both the fall and spring (Johnson et al, 2016). Juvenile Atlantic salmon have also been observed to feed on the eggs of pink salmon in the rivers Indera and Pulonga, Kola Peninsula, north-eastern Russia (Rasputina et al, 2016).…”