Food availability effect on population dynamics of the midge Chironomus riparius: a Leslie modeling approach

2004 ◽  
Vol 175 (3) ◽  
pp. 217-229 ◽  
Author(s):  
S. Charles ◽  
M. Ferreol ◽  
A. Chaumot ◽  
A.R.R. Péry
Keyword(s):  
Population Dynamics ◽  
Food Availability ◽  
Chironomus Riparius ◽  
Modeling Approach

A MODELING APPROACH TO LINK FOOD AVAILABILITY, GROWTH, EMERGENCE, AND REPRODUCTION FOR THE MIDGE CHIRONOMUS RIPARIUS

2002 ◽  
Vol 21 (11) ◽  
pp. 2507 ◽  
Author(s):  
Alexandre R.R. Péry ◽  
Raphaël Mons ◽  
Patrick Flammarion ◽  
Laurent Lagadic ◽  
Jeanne Garric
Keyword(s):  
Food Availability ◽  
Chironomus Riparius ◽  
Modeling Approach

Food supplementation and abundance estimation in the white-footed mouse

2006 ◽  
Vol 84 (8) ◽  
pp. 1210-1215 ◽  
Author(s):  
Pei-Jen L. Shaner
Keyword(s):  
Population Dynamics ◽  
Food Availability ◽  
Robust Design ◽  
Meta Analysis ◽  
Design Model ◽  
Food Supplementation ◽  
Abundance Estimates ◽  
Abundance Indices ◽  
Consumer Population ◽  
White Footed Mouse

Food availability often drives consumer population dynamics. However, food availability may also influence capture probability, which if not accounted for may create bias in estimating consumer abundance and confound the effects of food availability on consumer population dynamics. This study compared two commonly used abundance indices (minimum number alive (MNA) and number of animals captured per night per grid) with an abundance estimator based on robust design model as applied to the white-footed mouse ( Peromyscus leucopus (Rafinesque, 1818)) in food supplementation experiments. MNA consistently generated abundance estimates similar to the robust design model, regardless of food supplementation. The number of animals captured per night per grid, however, consistently generated lower abundance estimates compared with MNA and the robust design model. Nevertheless, the correlations between abundance estimates from MNA, number of animals captured, and robust design model were not influenced by food supplementation. This study demonstrated that food supplementation is not likely to create bias among these different measures of abundance. Therefore, there is a great potential for conducting meta-analysis of food supplementation effect on consumer population dynamics (particularly in small mammals) across studies using different abundance indices and estimators.

A modeling approach to link food availability, growth, emergence, and reproduction for the midgeChironomus riparius

2002 ◽  
Vol 21 (11) ◽  
pp. 2507-2513 ◽  
Author(s):  
Alexandre R. R. Péry ◽  
Raphaël Mons ◽  
Patrick Flammarion ◽  
Laurent Lagadic ◽  
Jeanne Garric
Keyword(s):  
Food Availability ◽  
Modeling Approach

scholarly journals Weather and food availability additively affect reproductive output in an expanding raptor population

Oecologia ◽  
2021 ◽  
Author(s):  
Melanie Nägeli ◽  
Patrick Scherler ◽  
Stephanie Witczak ◽  
Benedetta Catitti ◽  
Adrian Aebischer ◽  
...  
Keyword(s):  
Population Dynamics ◽  
Food Availability ◽  
Reproductive Output ◽  
Weather Conditions ◽  
Interactive Effects ◽  
Food Supplementation ◽  
Nestling Development ◽  
Trade Offs ◽  
Adverse Weather ◽  
Expanding Population

AbstractThe joint effects of interacting environmental factors on key demographic parameters can exacerbate or mitigate the separate factors’ effects on population dynamics. Given ongoing changes in climate and land use, assessing interactions between weather and food availability on reproductive performance is crucial to understand and forecast population dynamics. By conducting a feeding experiment in 4 years with different weather conditions, we were able to disentangle the effects of weather, food availability and their interactions on reproductive parameters in an expanding population of the red kite (Milvus milvus), a conservation-relevant raptor known to be supported by anthropogenic feeding. Brood loss occurred mainly during the incubation phase, and was associated with rainfall and low food availability. In contrast, brood loss during the nestling phase occurred mostly due to low temperatures. Survival of last-hatched nestlings and nestling development was enhanced by food supplementation and reduced by adverse weather conditions. However, we found no support for interactive effects of weather and food availability, suggesting that these factors affect reproduction of red kites additively. The results not only suggest that food-weather interactions are prevented by parental life-history trade-offs, but that food availability and weather conditions are crucial separate determinants of reproductive output, and thus population productivity. Overall, our results suggest that the observed increase in spring temperatures and enhanced anthropogenic food resources have contributed to the elevational expansion and the growth of the study population during the last decades.

Some Aspects of the Population Dynamics ofAsterina Gibbosa(Asteroidea)

1978 ◽  
Vol 58 (2) ◽  
pp. 451-466 ◽  
Author(s):  
R. G. Crump ◽  
R. H. Emson
Keyword(s):  
Population Dynamics ◽  
Body Weight ◽  
Food Availability ◽  
Growth Rates ◽  
Field Studies ◽  
Regular Growth ◽  
Age Classes ◽  
Skeletal Structures ◽  
Availability Factor ◽  
Field Information

Very few field studies of the population dynamics of starfish have been undertaken; such work depends upon being able to age individuals and identify age classes in the field. Information regarding growth rates in asteroids is notoriously difficult to obtain, due primarily to the absence of any method of assessing age, except where clear and obvious recruitment and regular growth provide size/age relationships. Numerous investigations of skeletal structures in asteroids by Smith (1940), Feder (1956), Hatanaka & Kosaka (1959) and Crump (1971) have failed to reveal any trace of growth lines similar to those found by Moore (1935), Jensen (1969) and Ebert (1970) in echinoids. In forcipulate asteroids, it is well established that growth depends primarily on temperature (Vevers, 1949; Hancock, 1958) and the availability of suitable food supplies (Mead, 1900; Galtsoff & Loosanoff, 1939; Smith, 1940; Vevers, 1949; Feder, 1956, 1970; Hancock, 1958). The food availability factor acts in such a way that it is impossible to tell the age of an adult starfish from its size; for example, in the spinulosan asteroid Patiriella regularts (Verrill), Crump (1969) found that specimens kept without food for 44 weeks lost 33 % of the original body weight, whilst P. regularts which had been fed on freshly killed crabs, showed a mean net increase of 629% of the original net weight over the same period.

Sign in / Sign up

Export Citation Format

Share Document