scholarly journals Bottom–up trophic effects on fisher Pekania pennanti harvest age structure: associations with mast, voles and owls

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Janet E. Greenhorn ◽  
Jeff Bowman ◽  
Simon T. Denomme-Brown ◽  
Danielle M. Ethier
Keyword(s):  
Age Structure ◽  
Bottom Up ◽  
Trophic Effects ◽  
Pekania Pennanti

scholarly journals Evidence for bottom–up trophic effects on return rates to a second spawning for Atlantic salmon (Salmo salar) from the Miramichi River, Canada

2012 ◽  
Vol 69 (9) ◽  
pp. 1656-1667 ◽  
Author(s):  
Gérald Chaput ◽  
Hugues P. Benoît
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Prey Availability ◽  
Positive Association ◽  
Small Fish ◽  
Bottom Up ◽  
Return Rates ◽  
Atlantic Salmon Salmo Salar ◽  
Trophic Effects ◽  
Short Period

Abstract Chaput, G., and Benoît, H. P. 2012. Evidence for bottom–up trophic effects on return rates to a second spawning for Atlantic salmon (Salmo salar) from the Miramichi River, Canada. – ICES Journal of Marine Science, 69: 1656–1667. Increased return rates of consecutive repeat-spawning Atlantic salmon (Salmo salar) have been noted in the Miramichi River during the past two decades, and the short period for their reconditioning at sea suggests that they occupy the southern Gulf of St Lawrence ecosystem. A 40-year time-series of observations was used to examine linkages between return rates to a second spawning for Atlantic salmon in the Miramichi River and changes in the small fish community of the southern Gulf of St Lawrence that is potential prey for adult salmon. The positive association between the variations in the return rates of repeat spawners and the variations in the small fish biomass index early in the reconditioning year at sea provides evidence that abundant food supplies after return to sea following first spawning may be beneficial for the survival of Atlantic salmon to a second consecutive spawning. In contrast, no association was found between prey availability and return rates of alternate repeat spawners that presumably recondition outside the Gulf of St Lawrence.

scholarly journals Artificial light at night causes top‐down and bottom‐up trophic effects on invertebrate populations

2018 ◽  
Vol 55 (6) ◽  
pp. 2698-2706 ◽  
Author(s):  
Jonathan Bennie ◽  
Thomas W. Davies ◽  
David Cruse ◽  
Richard Inger ◽  
Kevin J. Gaston
Keyword(s):  
Artificial Light ◽  
Top Down ◽  
Light At Night ◽  
Bottom Up ◽  
Trophic Effects

Psychology and Culture: Top Down Versus Bottom Up?

PsycCRITIQUES ◽  
2005 ◽  
Vol 50 (19) ◽  
Author(s):  
Michael Cole
Keyword(s):  
Top Down ◽  
Bottom Up
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