Diel Pattern of Predation Risk in Microtine Rodents

Oikos ◽  
1993 ◽  
Vol 68 (3) ◽  
pp. 510 ◽  
Author(s):  
Stefan Halle
Keyword(s):  
Predation Risk ◽  
Diel Pattern ◽  
Microtine Rodents

Do scent marks increase predation risk of microtine rodents?

Oikos ◽  
2001 ◽  
Vol 95 (2) ◽  
pp. 275-281 ◽  
Author(s):  
Minna Koivula ◽  
Erkki Korpimäki
Keyword(s):  
Predation Risk ◽  
Scent Marks ◽  
Microtine Rodents

scholarly journals Why lemmings have indoor plumbing in summer

1996 ◽  
Vol 74 (10) ◽  
pp. 1947-1949 ◽  
Author(s):  
Rudy Boonstra ◽  
Charles J. Krebs ◽  
Alice Kenney
Keyword(s):  
Predation Risk ◽  
Ultraviolet Light ◽  
Canadian Arctic ◽  
Falco Tinnunculus ◽  
Vegetation Growth ◽  
Hunting Activity ◽  
Microtine Rodents ◽  
Dicrostonyx Groenlandicus ◽  
High Predation ◽  
Buteo Lagopus

The faeces and urine of microtine rodents are visible in ultraviolet light, and diurnal raptors, such as European kestrels (Falco tinnunculus) and rough-legged buzzards (Buteo lagopus), have the ability to see in ultraviolet light. It has been reported that in Fennoscandia, these raptors use this ability to concentrate their hunting activity in spring on areas where microtines are abundant. We hypothesized that in arctic tundra areas in summer, intense avian predation pressure and short vegetation should select for microtine behaviour that would minimize their exposure to these raptors. We dug up 62 collared lemming (Dicrostonyx groenlandicus) burrows in the Canadian Arctic and all had underground latrines. Latrines are not hidden underground in winter, when lemmings live under the snow, build nests above ground, and defecate above ground, nor does this occur in microtine species living in temperate areas, where summer vegetation growth is greater. Thus, high predation risk may influence not only where prey forage but also where they defecate.

Elevated nest predation risk promotes offspring size variation in birds with prolonged parental care.

2019 ◽  
Author(s):  
Gretchen F. Wagner ◽  
Emeline Mourocq ◽  
Michael Griesser
Keyword(s):  
Predation Risk ◽  
Reproductive Cycle ◽  
Perceived Risk ◽  
Nest Predation ◽  
Bird Species ◽  
Size Variation ◽  
Egg Laying ◽  
Offspring Size ◽  
Natural Predation ◽  
Risk Spreading

Predation of offspring is the main cause of reproductive failure in many species, and the mere fear of offspring predation shapes reproductive strategies. Yet, natural predation risk is ubiquitously variable and can be unpredictable. Consequently, the perceived prospect of predation early in a reproductive cycle may not reflect the actual risk to ensuing offspring. An increased variance in investment across offspring has been linked to breeding in unpredictable environments in several taxa, but has so far been overlooked as a maternal response to temporal variation in predation risk. Here, we experimentally increased the perceived risk of nest predation prior to egg-laying in seven bird species. Species with prolonged parent-offspring associations increased their intra-brood variation in egg, and subsequently offspring, size. High risk to offspring early in a reproductive cycle can favour a risk-spreading strategy particularly in species with the greatest opportunity to even out offspring quality after fledging.

scholarly journals Plumage brightness, vigilance, escape potential, and predation risk in male and female Eurasian Siskins (Spinus spinus)

The Auk ◽  
2014 ◽  
Vol 131 (1) ◽  
pp. 61-72 ◽  
Author(s):  
Jordi Pascual ◽  
Juan Carlos Senar ◽  
Jordi Domènech
Keyword(s):  
Predation Risk ◽  
Male And Female
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