Population Synchrony in Mayflies: A Predator Satiation Hypothesis

Evolution ◽  
1982 ◽  
Vol 36 (4) ◽  
pp. 810 ◽  
Author(s):  
Bernard W. Sweeney ◽  
Robin L. Vannote
Keyword(s):  
Predator Satiation ◽  
Population Synchrony ◽  
Satiation Hypothesis

scholarly journals POPULATION SYNCHRONY IN MAYFLIES: A PREDATOR SATIATION HYPOTHESIS

Evolution ◽  
1982 ◽  
Vol 36 (4) ◽  
pp. 810-821 ◽  
Author(s):  
Bernard W. Sweeney ◽  
Robin L. Vannote
Keyword(s):  
Predator Satiation ◽  
Population Synchrony ◽  
Satiation Hypothesis

Chemical defences of fruits and mast-fruiting of dipterocarps

1999 ◽  
Vol 15 (5) ◽  
pp. 695-700 ◽  
Author(s):  
Shinya Numata ◽  
Naoki Kachi ◽  
Toshinori Okuda ◽  
N. Manokaran
Keyword(s):  
Seed Production ◽  
Effective Means ◽  
Field Observations ◽  
Predator Satiation ◽  
Reproductive Synchrony ◽  
Chemical Defences ◽  
Mast Fruiting ◽  
Defence Strategy ◽  
Satiation Hypothesis

Mast-fruiting is the intermittent and synchronous production of large fruits by a population of plants at long intervals (Herrera et al. 1998, Kelly 1994). Several hypotheses have been proposed concerning the adaptive advantages of mast-fruiting (Janzen 1971, 1974; Kelly 1994), and some field observations have provided evidence for these hypotheses (Norton & Kelly 1988, Shibata et al. 1998, Sork 1993). The predator-satiation hypothesis is one well-known explanation for reproductive synchrony in plants and animals (Janzen 1971, 1974; Kelly 1994). This hypothesis claims that mast fruiting at irregular intervals of several years is an effective means of satiating vertebrate fruit predators: low seed production can only support low densities of predators during the periods between mast-fruiting events, but more fruits are produced than predators can consume in masting years (Janzen 1971, Kelly 1994). Thus, it may be said that mast-fruiting is a defence strategy of plants against post-dispersal vertebrate fruit predators.

A test of the predator satiation hypothesis, acorn predator size, and acorn preference

2018 ◽  
Vol 48 (2) ◽  
pp. 237-245 ◽  
Author(s):  
C.H. Greenberg ◽  
S.J. Zarnoch
Keyword(s):  
Removal Rate ◽  
Red Oak ◽  
Positive Trend ◽  
White Oak ◽  
Predator Satiation ◽  
Removal Rates ◽  
Crop Size ◽  
Predator Size ◽  
Satiation Hypothesis ◽  
Acorn Removal

Mast seeding is hypothesized to satiate seed predators with heavy production and reduce populations with crop failure, thereby increasing seed survival. Preference for red or white oak acorns could influence recruitment among oak species. We tested the predator satiation hypothesis, acorn preference, and predator size by concurrently measuring acorn production, mouse abundance, and white versus red oak acorn removal rates in exclosures allowing access by mice (HW), squirrels and smaller-sized vertebrates (WW), or all-sized vertebrates (C) for 12 years. Annual removal rate varied, but virtually all acorns were eventually removed from all exclosure types all years except one. Acorns were removed more slowly from HW than from WW or C exclosures, indicating that large vertebrates were not major acorn consumers, locally. Red and white oak acorn removal rates were similar except in two years, when red oak acorns were removed more rapidly. Removal slowed with increasing acorn crops, suggesting that heavy crops can “swamp” predators. Removal rate was negatively correlated with crop size the previous fall. A positive trend between mouse abundance and crop size the previous fall was evident; abundance decreased sharply the year following crop failures but not after moderate or heavy crops, suggesting that poor crops can dampen acorn predation the following year.

Population synchrony in ecological systems

2008 ◽  
Vol 50 (4) ◽  
pp. 325-327 ◽  
Author(s):  
Akiko Satake ◽  
Itsuro Koizumi
Keyword(s):  
Ecological Systems ◽  
Population Synchrony
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