Rover/sitterDrosophila melanogaster larval foraging polymorphism as a function of larval development, food-patch quality, and starvation

1989 ◽  
Vol 2 (3) ◽  
pp. 301-313 ◽  
Author(s):  
Susanne A. Graf ◽  
Maria B. Sokolowski
Keyword(s):  
Larval Development ◽  
Patch Quality ◽  
Food Patch

scholarly journals Public information for the assessment of quality: a widespread social phenomenon

2002 ◽  
Vol 357 (1427) ◽  
pp. 1549-1557 ◽  
Author(s):  
Thomas J. Valone ◽  
Jennifer J. Templeton
Keyword(s):  
Empirical Work ◽  
Public Information ◽  
Environmental Parameters ◽  
Patch Quality ◽  
Social Phenomenon ◽  
Food Patch ◽  
Complete Understanding ◽  
Future Work ◽  
Benefits And Costs

We propose that the use of public information about the quality of environmental resources, obtained by monitoring the sampling behaviour of others, may be a widespread social phenomenon allowing individuals to make faster, more accurate assessments of their environment. To demonstrate this (i) we define public information and distinguish it from other kinds of social information; (ii) we review empirical work demonstrating the benefits and costs of using public information to estimate food patch quality; (iii) we examine recent work showing that individuals may also be using public information to improve their estimates of the quality of such disparate environmental parameters as breeding patches, opponents and mates; and finally (iv) we suggest avenues of future work to better understand the nature of public information use and when it might be used or ignored. Such work should lead to a more complete understanding of the behaviour of individuals in social aggregations.

Food patch depletion by ruddy ducks: foraging by expectation rules

1989 ◽  
Vol 67 (11) ◽  
pp. 2751-2755 ◽  
Author(s):  
Michael W. Tome
Keyword(s):  
Foraging Behavior ◽  
Prey Density ◽  
Patch Quality ◽  
Food Patch ◽  
Ruddy Ducks ◽  
Patch Depletion ◽  
Glass Aquarium ◽  
Oxyura Jamaicensis

The foraging behavior of six ruddy ducks (Oxyura jamaicensis) was studied in a large concrete and glass aquarium to determine if they used either a number or time expectation rule to decide when to leave a patch of food. Nine trials were conducted in which the prey density in each of two food patches remained constant for three consecutive trials and then was changed. If the foraging ruddy ducks were using an expectation rule to determine when to leave a patch, then the time spent in the patch (time expectation) or number of prey consumed from the patch (number expectation) should not change with a change in patch quality. The results of this experiment were not consistent with the predictions of either the time or number expectation rule. Thus, ruddy ducks appear to use some other measure to determine the appropriate time to leave a food patch.

Effects of ocean acidification on larval development and early post-hatching traits in Concholepas concholepas (loco)

2014 ◽  
Vol 514 ◽  
pp. 87-103 ◽  
Author(s):  
PH Manríquez ◽  
ME Jara ◽  
ML Mardones ◽  
R Torres ◽  
NA Lagos ◽  
...  
Keyword(s):  
Ocean Acidification ◽  
Larval Development ◽  
Concholepas Concholepas
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