Effects of Temperature on Life History Strategy of the Rotifer Euchlanis dilatata

Biparental care systems are a valuable model to examine conflict, cooperation, and coordination between unrelated individuals, as the product of the interactions between the parents influences the fitness of both individuals. A common experimental technique for testing coordinated responses to changes in the costs of parental care is to temporarily handicap one parent, inducing a higher cost of providing care. However, dissimilarity in experimental designs of these studies has hindered interspecific comparisons of the patterns of cost distribution between parents and offspring. Here we apply a comparative experimental approach by handicapping a parent at nests of five bird species using the same experimental treatment. In some species, a decrease in care by a handicapped parent was compensated by its partner, while in others the increased costs of care were shunted to the offspring. Parental responses to an increased cost of care primarily depended on the total duration of care that offspring require. However, life history pace (i.e., adult survival and fecundity) did not influence parental decisions when faced with a higher cost of caring. Our study highlights that a greater attention to intergenerational trade-offs is warranted, particularly in species with a large burden of parental care. Moreover, we demonstrate that parental care decisions may be weighed more against physiological workload constraints than against future prospects of reproduction, supporting evidence that avian species may devote comparable amounts of energy into survival, regardless of life history strategy.

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Effects of temperature on life history set the sensitivity to fishing in Atlantic cod Gadus morhua

Marine Ecology Progress Series ◽

10.3354/meps10943 ◽

2014 ◽

Vol 514 ◽

pp. 217-229 ◽

Cited By ~ 11

Author(s):

HY Wang ◽

LW Botsford ◽

JW White ◽

MJ Fogarty ◽

F Juanes ◽

...

Keyword(s):

Life History ◽

Gadus Morhua ◽

Atlantic Cod ◽

Effects Of Temperature

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Relationships between temperature and Pacific hake distribution vary across latitude and life-history stage

Marine Ecology Progress Series ◽

10.3354/meps13286 ◽

2020 ◽

Vol 639 ◽

pp. 185-197 ◽

Cited By ~ 2

Author(s):

MJ Malick ◽

ME Hunsicker ◽

MA Haltuch ◽

SL Parker-Stetter ◽

AM Berger ◽

...

Keyword(s):

Life History ◽

Environmental Effects ◽

Environmental Conditions ◽

Vancouver Island ◽

Additive Models ◽

Life History Stage ◽

Fish Stocks ◽

Merluccius Productus ◽

Multiple Dimensions ◽

Effects Of Temperature

Environmental conditions can have spatially complex effects on the dynamics of marine fish stocks that change across life-history stages. Yet the potential for non-stationary environmental effects across multiple dimensions, e.g. space and ontogeny, are rarely considered. In this study, we examined the evidence for spatial and ontogenetic non-stationary temperature effects on Pacific hake Merluccius productus biomass along the west coast of North America. Specifically, we used Bayesian additive models to estimate the effects of temperature on Pacific hake biomass distribution and whether the effects change across space or life-history stage. We found latitudinal differences in the effects of temperature on mature Pacific hake distribution (i.e. age 3 and older); warmer than average subsurface temperatures were associated with higher biomass north of Vancouver Island, but lower biomass offshore of Washington and southern Vancouver Island. In contrast, immature Pacific hake distribution (i.e. age 2) was better explained by a nonlinear temperature effect; cooler than average temperatures were associated with higher biomass coastwide. Together, our results suggest that Pacific hake distribution is driven by interactions between age composition and environmental conditions and highlight the importance of accounting for varying environmental effects across multiple dimensions.

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Age‐related reproductive performance of the Adélie penguin, a long‐lived seabird exhibiting similar outcomes regardless of individual life‐history strategy

Journal of Animal Ecology ◽

10.1111/1365-2656.13422 ◽

2021 ◽

Author(s):

Peter J. Kappes ◽

Katie M. Dugger ◽

Amélie Lescroël ◽

David G. Ainley ◽

Grant Ballard ◽

...

Keyword(s):

Life History ◽

Reproductive Performance ◽

Life History Strategy ◽

Adélie Penguin ◽

Adelie Penguin ◽

Individual Life ◽

Age Related

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Genome size variation in deep-sea amphipods

Royal Society Open Science ◽

10.1098/rsos.170862 ◽

2017 ◽

Vol 4 (9) ◽

pp. 170862 ◽

Cited By ~ 3

Author(s):

H. Ritchie ◽

A. J. Jamieson ◽

S. B. Piertney

Keyword(s):

Life History ◽

Genome Size ◽

Deep Sea ◽

Research Effort ◽

Life History Strategy ◽

Size Variation ◽

Genome Size Variation ◽

New Hebrides ◽

Contrast Analysis ◽

Independent Contrast

Genome size varies considerably across taxa, and extensive research effort has gone into understanding whether variation can be explained by differences in key ecological and life-history traits among species. The extreme environmental conditions that characterize the deep sea have been hypothesized to promote large genome sizes in eukaryotes. Here we test this supposition by examining genome sizes among 13 species of deep-sea amphipods from the Mariana, Kermadec and New Hebrides trenches. Genome sizes were estimated using flow cytometry and found to vary nine-fold, ranging from 4.06 pg (4.04 Gb) in Paralicella caperesca to 34.79 pg (34.02 Gb) in Alicella gigantea . Phylogenetic independent contrast analysis identified a relationship between genome size and maximum body size, though this was largely driven by those species that display size gigantism. There was a distinct shift in the genome size trait diversification rate in the supergiant amphipod A. gigantea relative to the rest of the group. The variation in genome size observed is striking and argues against genome size being driven by a common evolutionary history, ecological niche and life-history strategy in deep-sea amphipods.

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