scholarly journals Maternal food supplementation and perceived predation risk modify egg composition and eggshell traits but not offspring condition

2019 ◽  
Vol 222 (19) ◽  
pp. jeb201954
Author(s):  
Chiara Morosinotto ◽  
Robert L. Thomson ◽  
Erkki Korpimäki ◽  
Rafael Mateo ◽  
Suvi Ruuskanen
Keyword(s):  
Predation Risk ◽  
Food Supplementation ◽  
Egg Composition ◽  
Perceived Predation Risk

Perceived predation risk, parasitism, and the foraging behavior of a freshwater snail (Potamopyrgus antipodarum)

1998 ◽  
Vol 76 (10) ◽  
pp. 1878-1884 ◽  
Author(s):  
Edward P Levri
Keyword(s):  
Predation Risk ◽  
Foraging Behavior ◽  
Freshwater Snail ◽  
Potamopyrgus Antipodarum ◽  
Plain Water ◽  
Fish Diet ◽  
Fish Predator ◽  
Size Dependent ◽  
Individual Size ◽  
Perceived Predation Risk

Foraging behavior can be influenced by such factors as predation risk, individual size, and parasite infection. Snails (Potamopyrgus antipodarum) placed in tanks with large rocks were exposed to four types of water: (1) water with crushed snails, (2) water from a tank in which fish (Gobiomorphus cotidianus) were fed only trout chow, (3) water from a tank where the fish were also fed snails, and (4) plain water. Snails could respond by moving to the top of rocks (where algal food was present) or to the bottom of rocks (where the predation risk was lower). The snails responded to fish chemicals by moving to the bottom of rocks. The response was dependent on snail size and fish diet. Smaller snails moved to the bottom of rocks more than larger snails did. Trematode-infected snails were found on top of the rocks more than other classes of snails, but infected snails still moved to the bottom of rocks in response to the fish predator. Snails eaten by fish in the field tend to be smaller than snails in the overall available population. Thus, snails that are more vulnerable to predation respond more intensely to the odor of fish by moving to the bottom of rocks. This size-dependent response to fish appears to be independent of the occurrence of trematode infection.

Food supplementation and predation risk in harsh climate: interactive effects on abundance and body condition of tit species

Oikos ◽  
2016 ◽  
Vol 126 (6) ◽  
pp. 863-873 ◽  
Author(s):  
Chiara Morosinotto ◽  
Alexandre Villers ◽  
Rauno Varjonen ◽  
Erkki Korpimäki
Keyword(s):  
Predation Risk ◽  
Body Condition ◽  
Interactive Effects ◽  
Food Supplementation ◽  
Harsh Climate

Functional Traits, Flocking Propensity, and Perceived Predation Risk in an Amazonian Understory Bird Community

2016 ◽  
Vol 187 (5) ◽  
pp. 607-619 ◽  
Author(s):  
Ari E. Martínez ◽  
Juan P. Gomez ◽  
José Miguel Ponciano ◽  
Scott K. Robinson
Keyword(s):  
Predation Risk ◽  
Functional Traits ◽  
Bird Community ◽  
Perceived Predation Risk

scholarly journals Experimental manipulation of perceived predation risk and cortisol generates contrasting trait trajectories in plastic crucian carp

2020 ◽  
Vol 223 (4) ◽  
pp. jeb213611
Author(s):  
Jerker Vinterstare ◽  
Kaj Hulthén ◽  
P. Anders Nilsson ◽  
Helen Nilsson Sköld ◽  
Christer Brönmark
Keyword(s):  
Predation Risk ◽  
Crucian Carp ◽  
Experimental Manipulation ◽  
Perceived Predation Risk
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