Data from: Opposing effects of mortality factors on progeny operational sex ratio may thwart adaptive manipulation of primary sex ratio
Despite extensive research on mechanisms generating biases in sex ratios, the capacity of natural enemies to shift or further skew operational sex ratios following sex allocation and parental care remains largely unstudied in natural populations. Male cocoons of the sawfly Neodiprion abietis (Hymeno...
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ftdryad:oai:v1.datadryad.org:10255/dryad.141629 2023-05-15T17:22:49+02:00 Data from: Opposing effects of mortality factors on progeny operational sex ratio may thwart adaptive manipulation of primary sex ratio Moreau, Gaétan Eveleigh, Eldon S. Lucarotti, Christopher J. Morin, Benoit Quiring, Dan T. Newfoundland Canada 2017-06-06T20:54:02Z http://hdl.handle.net/10255/dryad.141629 https://doi.org/10.5061/dryad.4c058 unknown doi:10.5061/dryad.4c058/1 doi:10.1002/ece3.3071 doi:10.5061/dryad.4c058 Moreau G, Eveleigh ES, Lucarotti CJ, Morin B, Quiring DT (2017) Opposing effects of mortality factors on progeny operational sex ratio may thwart adaptive manipulation of primary sex ratio. Ecology and Evolution 7(13): 4973-4981. 2045-7758 http://hdl.handle.net/10255/dryad.141629 balsam fir sawfly differential mortality pupal stage Article 2017 ftdryad https://doi.org/10.5061/dryad.4c058 https://doi.org/10.5061/dryad.4c058/1 https://doi.org/10.1002/ece3.3071 2020-01-01T15:48:38Z Despite extensive research on mechanisms generating biases in sex ratios, the capacity of natural enemies to shift or further skew operational sex ratios following sex allocation and parental care remains largely unstudied in natural populations. Male cocoons of the sawfly Neodiprion abietis (Hymenoptera: Diprionidae) are consistently smaller than those of females, with very little overlap, and thus, we were able to use cocoon size to sex cocoons. We studied three consecutive cohorts of N. abietis in six forest stands to detect cocoon volume-associated biases in the attack of predators, pathogens, and parasitoids and examine how the combined effect of natural enemies shapes the realized operational sex ratio. Neodiprion abietis mortality during the cocoon stage was sex-biased, being 1.6 times greater for males than females. Greater net mortality in males occurred because male-biased mortality caused by a pteromalid parasitic wasp and a baculovirus was greater and more skewed than female-biased mortality caused by ichneumonid parasitic wasps. Variation in the susceptibility of each sex to each family of parasitoids was associated with differences in size and life histories of male and female hosts. A simulation based on the data indicated that shifts in the nature of differential mortality have different effects on the sex ratio and fitness of survivors. Because previous work has indicated that reduced host plant foliage quality induces female-biased mortality in this species, bottom-up and top-down factors acting on populations can affect operational sex ratios in similar or opposite ways. Shifts in ecological conditions therefore have the potential to alter progeny fitness and produce extreme sex ratio skews, even in the absence of unbalanced sex allocation. This would limit the capacity of females to anticipate the operational sex ratio and reliably predict the reproductive success of each gender at sex allocation. Article in Journal/Newspaper Newfoundland Dryad Digital Repository (Duke University) Canada |
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Open Polar |
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Dryad Digital Repository (Duke University) |
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ftdryad |
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unknown |
topic |
balsam fir sawfly differential mortality pupal stage |
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balsam fir sawfly differential mortality pupal stage Moreau, Gaétan Eveleigh, Eldon S. Lucarotti, Christopher J. Morin, Benoit Quiring, Dan T. Data from: Opposing effects of mortality factors on progeny operational sex ratio may thwart adaptive manipulation of primary sex ratio |
topic_facet |
balsam fir sawfly differential mortality pupal stage |
description |
Despite extensive research on mechanisms generating biases in sex ratios, the capacity of natural enemies to shift or further skew operational sex ratios following sex allocation and parental care remains largely unstudied in natural populations. Male cocoons of the sawfly Neodiprion abietis (Hymenoptera: Diprionidae) are consistently smaller than those of females, with very little overlap, and thus, we were able to use cocoon size to sex cocoons. We studied three consecutive cohorts of N. abietis in six forest stands to detect cocoon volume-associated biases in the attack of predators, pathogens, and parasitoids and examine how the combined effect of natural enemies shapes the realized operational sex ratio. Neodiprion abietis mortality during the cocoon stage was sex-biased, being 1.6 times greater for males than females. Greater net mortality in males occurred because male-biased mortality caused by a pteromalid parasitic wasp and a baculovirus was greater and more skewed than female-biased mortality caused by ichneumonid parasitic wasps. Variation in the susceptibility of each sex to each family of parasitoids was associated with differences in size and life histories of male and female hosts. A simulation based on the data indicated that shifts in the nature of differential mortality have different effects on the sex ratio and fitness of survivors. Because previous work has indicated that reduced host plant foliage quality induces female-biased mortality in this species, bottom-up and top-down factors acting on populations can affect operational sex ratios in similar or opposite ways. Shifts in ecological conditions therefore have the potential to alter progeny fitness and produce extreme sex ratio skews, even in the absence of unbalanced sex allocation. This would limit the capacity of females to anticipate the operational sex ratio and reliably predict the reproductive success of each gender at sex allocation. |
format |
Article in Journal/Newspaper |
author |
Moreau, Gaétan Eveleigh, Eldon S. Lucarotti, Christopher J. Morin, Benoit Quiring, Dan T. |
author_facet |
Moreau, Gaétan Eveleigh, Eldon S. Lucarotti, Christopher J. Morin, Benoit Quiring, Dan T. |
author_sort |
Moreau, Gaétan |
title |
Data from: Opposing effects of mortality factors on progeny operational sex ratio may thwart adaptive manipulation of primary sex ratio |
title_short |
Data from: Opposing effects of mortality factors on progeny operational sex ratio may thwart adaptive manipulation of primary sex ratio |
title_full |
Data from: Opposing effects of mortality factors on progeny operational sex ratio may thwart adaptive manipulation of primary sex ratio |
title_fullStr |
Data from: Opposing effects of mortality factors on progeny operational sex ratio may thwart adaptive manipulation of primary sex ratio |
title_full_unstemmed |
Data from: Opposing effects of mortality factors on progeny operational sex ratio may thwart adaptive manipulation of primary sex ratio |
title_sort |
data from: opposing effects of mortality factors on progeny operational sex ratio may thwart adaptive manipulation of primary sex ratio |
publishDate |
2017 |
url |
http://hdl.handle.net/10255/dryad.141629 https://doi.org/10.5061/dryad.4c058 |
op_coverage |
Newfoundland Canada |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_relation |
doi:10.5061/dryad.4c058/1 doi:10.1002/ece3.3071 doi:10.5061/dryad.4c058 Moreau G, Eveleigh ES, Lucarotti CJ, Morin B, Quiring DT (2017) Opposing effects of mortality factors on progeny operational sex ratio may thwart adaptive manipulation of primary sex ratio. Ecology and Evolution 7(13): 4973-4981. 2045-7758 http://hdl.handle.net/10255/dryad.141629 |
op_doi |
https://doi.org/10.5061/dryad.4c058 https://doi.org/10.5061/dryad.4c058/1 https://doi.org/10.1002/ece3.3071 |
_version_ |
1766109682399707136 |