Capital and Income Breeding as Alternative Tactics of Resource Use in Reproduction

Oikos ◽  
1997 ◽  
Vol 78 (1) ◽  
pp. 57 ◽  
Author(s):  
K. Ingemar Jönsson ◽  
K. Ingemar Jonsson
Keyword(s):  
Resource Use ◽  
Alternative Tactics ◽  
Income Breeding ◽  
Capital And Income Breeding

scholarly journals Evidence for use of both capital and income breeding strategies in the mangrove tree crab, Aratus pisonii

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jade Carver ◽  
Morgan Meidell ◽  
Zachary J. Cannizzo ◽  
Blaine D. Griffen
Keyword(s):  
Breeding Season ◽  
Breeding Strategy ◽  
Reproductive Period ◽  
Breeding Strategies ◽  
Mangrove Tree ◽  
Income Breeding ◽  
Aratus Pisonii ◽  
Breeding Seasons ◽  
And Storage ◽  
Capital And Income Breeding

AbstractTwo common strategies organisms use to finance reproduction are capital breeding (using energy stored prior to reproduction) and income breeding (using energy gathered during the reproductive period). Understanding which of these two strategies a species uses can help in predicting its population dynamics and how it will respond to environmental change. Brachyuran crabs have historically been considered capital breeders as a group, but recent evidence has challenged this assumption. Here, we focus on the mangrove tree crab, Aratus pisonii, and examine its breeding strategy on the Atlantic Florida coast. We collected crabs during and after their breeding season (March–October) and dissected them to discern how energy was stored and utilized for reproduction. We found patterns of reproduction and energy storage that are consistent with both the use of stored energy (capital) and energy acquired (income) during the breeding season. We also found that energy acquisition and storage patterns that supported reproduction were influenced by unequal tidal patterns associated with the syzygy tide inequality cycle. Contrary to previous assumptions for crabs, we suggest that species of crab that produce multiple clutches of eggs during long breeding seasons (many tropical and subtropical species) may commonly use income breeding strategies.

LIFETIME NUTRIENT DYNAMICS REVEAL SIMULTANEOUS CAPITAL AND INCOME BREEDING IN A PARASITOID

Ecology ◽  
2005 ◽  
Vol 86 (3) ◽  
pp. 545-554 ◽  
Author(s):  
Jérôme Casas ◽  
Sylvain Pincebourde ◽  
Nicole Mandon ◽  
Fabrice Vannier ◽  
Rémi Poujol ◽  
...  
Keyword(s):  
Nutrient Dynamics ◽  
Income Breeding ◽  
Capital And Income Breeding

scholarly journals Capital and income breeding: the role of food supply

Ecology ◽  
2014 ◽  
Vol 95 (4) ◽  
pp. 882-896 ◽  
Author(s):  
Philip A. Stephens ◽  
Alasdair I. Houston ◽  
Karin C. Harding ◽  
Ian L. Boyd ◽  
John M. McNamara
Keyword(s):  
Food Supply ◽  
Income Breeding ◽  
Capital And Income Breeding

scholarly journals Capital and income breeding traits differentiate trophic match–mismatch dynamics in large herbivores

2013 ◽  
Vol 368 (1624) ◽  
pp. 20120484 ◽  
Author(s):  
Jeffrey Kerby ◽  
Eric Post
Keyword(s):  
Life History ◽  
Reproductive Performance ◽  
Environmental Conditions ◽  
Life History Strategies ◽  
Breeding Strategies ◽  
Large Herbivores ◽  
Income Breeding ◽  
Resource Variability ◽  
Capital And Income Breeding ◽  
Trophic Mismatch

For some species, climate change has altered environmental conditions away from those in which life-history strategies evolved. In such cases, if adaptation does not keep pace with these changes, existing life-history strategies may become maladaptive and lead to population declines. We use life-history theory, with a specific emphasis on breeding strategies, in the context of the trophic match–mismatch framework to form generalizable hypotheses about population-level consumer responses to climate-driven perturbations in resource availability. We first characterize the income and breeding traits of sympatric caribou and muskoxen populations in western Greenland, and then test trait-based hypotheses about the expected reproductive performance of each population during a period of high resource variability at that site. The immediate reproductive performance of income breeding caribou decreased with trophic mismatch. In contrast, capital breeding muskoxen were relatively unaffected by current breeding season resource variability, but their reproductive performance was sensitive to resource conditions from previous years. These responses matched our expectations about how capital and income breeding strategies should influence population susceptibility to phenological mismatch. We argue for a taxon-independent assessment of trophic mismatch vulnerability based on a life-history strategy perspective in the context of prevailing environmental conditions.

Differences in productivity QOL, and resource use in newly diagnosed and established irritable bowel syndrome (IBS) patients

2001 ◽  
Vol 120 (5) ◽  
pp. A634-A634
Author(s):  
P JHINGRAN ◽  
J RICCI ◽  
M MARKOWITZ ◽  
S GORDON ◽  
A ASGHARIAN ◽  
...  
Keyword(s):  
Irritable Bowel Syndrome ◽  
Resource Use ◽  
Newly Diagnosed ◽  
Irritable Bowel
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