scholarly journals Parental investment in the Columbian ground squirrel: empirical tests of sex allocation models

Ecology ◽  
2021 ◽  
Author(s):  
Thibaut Barra ◽  
Vincent A. Viblanc ◽  
Claire Saraux ◽  
Jan O. Murie ◽  
F. Stephen Dobson
Keyword(s):  
Parental Investment ◽  
Ground Squirrel ◽  
Sex Allocation ◽  
Empirical Tests

Parental investment and family dynamics: interactions between theory and empirical tests

2004 ◽  
Vol 46 (3) ◽  
pp. 231-241 ◽  
Author(s):  
Nick J. Royle ◽  
Ian R. Hartley ◽  
Geoff A. Parker
Keyword(s):  
Parental Investment ◽  
Family Dynamics ◽  
Empirical Tests

Parental Investment and Sex Allocation in a Viviparous Onychophoran

Oikos ◽  
1989 ◽  
Vol 56 (2) ◽  
pp. 224 ◽  
Author(s):  
John E. Havel ◽  
Chris C. Wilson ◽  
Paul D. N. Hebert
Keyword(s):  
Parental Investment ◽  
Sex Allocation

Sex allocation and sex-specific parental investment in an endangered seabird

Ibis ◽  
2017 ◽  
Vol 159 (2) ◽  
pp. 272-284 ◽  
Author(s):  
Anouk Spelt ◽  
Lorien Pichegru
Keyword(s):  
Parental Investment ◽  
Sex Allocation

scholarly journals How does breeding system variation modulate sexual antagonism?

2009 ◽  
Vol 5 (5) ◽  
pp. 717-720 ◽  
Author(s):  
Stéphanie Bedhomme ◽  
Giorgina Bernasconi ◽  
Joris M. Koene ◽  
Åsa Lankinen ◽  
H. S. Arathi ◽  
...  
Keyword(s):  
Sexual Reproduction ◽  
Sexual Conflict ◽  
Breeding System ◽  
Sex Allocation ◽  
Breeding Systems ◽  
Sexual Antagonism ◽  
Sexual Conflicts ◽  
Empirical Tests

The study of sexually antagonistic (SA) traits remains largely limited to dioecious (separate sex), mobile animals. However, the occurrence of sexual conflict is restricted neither by breeding system (the mode of sexual reproduction, e.g. dioecy or hermaphroditism) nor by sessility. Here, we synthesize how variation in breeding system can affect the evolution and expression of intra- and inter-locus sexual conflicts in plants and animals. We predict that, in hermaphrodites, SA traits will (i) display lower levels of polymorphism; (ii) respond more quickly to selection; and (iii) involve unique forms of interlocus conflict over sex allocation, mating roles and selfing rates. Explicit modelling and empirical tests in a broader range of breeding systems are necessary to obtain a general understanding of the evolution of SA traits.

Ural owl sex allocation and parental investment under poor food conditions

Oecologia ◽  
2003 ◽  
Vol 137 (1) ◽  
pp. 140-147 ◽  
Author(s):  
Jon E. Brommer ◽  
Patrik Karell ◽  
Tuomo Pihlaja ◽  
Jodie N. Painter ◽  
Craig R. Primmer ◽  
...  
Keyword(s):  
Parental Investment ◽  
Sex Allocation ◽  
Food Conditions ◽  
Ural Owl

Richardson’s ground squirrel litter size–sex ratio trade-off reveals conditional adaptive sex allocation

Oecologia ◽  
2021 ◽  
Author(s):  
Alexander R. Yeo ◽  
James F. Hare
Keyword(s):  
Sex Ratio ◽  
Litter Size ◽  
Ground Squirrel ◽  
Sex Allocation ◽  
Trade Off

scholarly journals Gestational experience alters sex allocation in the subsequent generation

2016 ◽  
Vol 3 (7) ◽  
pp. 160210 ◽  
Author(s):  
A. M. Edwards ◽  
E. Z. Cameron ◽  
J. C. Pereira ◽  
E. Wapstra ◽  
M. A. Ferguson-Smith ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Maternal Effects ◽  
Sex Allocation ◽  
Laboratory Mice ◽  
Offspring Sex Ratio ◽  
Offspring Sex ◽  
Stress Environment ◽  
Empirical Tests ◽  
Gestational Stress ◽  
Male To Female

Empirical tests of adaptive maternal sex allocation hypotheses have presented inconsistent results in mammals. The possibility that mothers are constrained in their ability to adjust sex ratios could explain some of the remaining variation. Maternal effects, the influence of the maternal phenotype or genotype on her developing offspring, may constrain sex allocation through physiological changes in response to the gestational environment. We tested if maternal effects constrain future parental sex allocation through a lowered gestational stress environment in laboratory mice. Females that experienced lowered stress as embryos in utero gave birth to female-biased litters as adults, with no change to litter size. Changes in offspring sex ratio was linked to peri-conceptual glucose, as those females that had increasing blood glucose peri-conceptionally gave birth to litters with a higher male to female sex ratio. There was, however, no effect of the lowered prenatal stress for developing male embryos and their sperm sex ratio when adult. We discuss the implications of maternal effects and maternal stress environment on the lifelong physiology of the offspring, particularly as a constraint on later maternal sex allocation.

Scanning Electron Microscopy and X-Ray Analyses of Dental Tissues from a Hibernator

1976 ◽  
Vol 34 ◽  
pp. 178-179
Author(s):  
M. L. Zimny ◽  
A. C. Haller
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Body Temperature ◽  
Ground Squirrel ◽  
Alveolar Bone ◽  
X Ray ◽  
Dental Tissues ◽  
Bone Minerals ◽  
Apical Tooth ◽  
Scanning Electron

During hibernation the ground squirrel is immobile, body temperature reduced and metabolism depressed. Hibernation has been shown to affect dental tissues varying degrees, although not much work has been done in this area. In limited studies, it has been shown that hibernation results in (1) mobilization of bone minerals; (2) deficient dentinogenesis and degeneration of alveolar bone; (3) presence of calculus and tears in the cementum; and (4) aggrevation of caries and pulpal and apical tooth abscesses. The purpose of this investigation was to study the effects of hibernation on dental tissues employing scanning electron microscopy (SEM) and related x-ray analyses.

Raising canine: Cross-species parallels in parental investment

2013 ◽  
Author(s):  
Eric T. Steiner ◽  
N. Clayton Silver ◽  
Pam Hall ◽  
Chantal Downing ◽  
Dominic Hurton ◽  
...  
Keyword(s):  
Parental Investment
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