S. K. Sakaluk

article

Size of nest‐cavity entrance influences male attractiveness and paternal provisioning in house wrens

D. S. Will, E. E. Dorset, C. F. Thompson, S. K. Sakaluk, more

In altricial birds, parental provisioning is plastic and can respond to a variety of environmental stimuli. In this study, we manipulated the size of entrances into artificial nest cavities (i.e. nestboxes) in a population of house wrens Troglodytes aedon as a means of manipulating a male's sexual attractiveness, and examined changes in parental provisioning. Nest cavities with large entrances are...

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The complex interplay between macronutrient intake, cuticular hydrocarbon expression and mating success in male decorated crickets

J. Rapkin, K. Jensen, C. M. House, S. K. Sakaluk, more

Journal of Evolutionary Biology > 30 > 4 > 711 - 727

The condition dependence of male sexual traits plays a central role in sexual selection theory. Relatively little, however, is known about the condition dependence of chemical signals used in mate choice and their subsequent effects on male mating success. Furthermore, few studies have isolated the specific nutrients responsible for condition‐dependent variation in male sexual traits. Here, we used...

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Multivariate sexual selection on male tegmina in wild populations of sagebrush crickets, Cyphoderris strepitans (Orthoptera: Haglidae)

G. D. Ower, J. Hunt, S. K. Sakaluk

Journal of Evolutionary Biology > 30 > 2 > 338 - 351

Although the strength and form of sexual selection on song in male crickets have been studied extensively, few studies have examined selection on the morphological structures that underlie variation in males’ song, particularly in wild populations. Geometric morphometric techniques were used to measure sexual selection on the shape, size and symmetry of both top and bottom tegmina in wild populations...

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Within‐female plasticity in sex allocation is associated with a behavioural polyphenism in house wrens

E. K. Bowers, C. F. Thompson, S. K. Sakaluk

Journal of Evolutionary Biology > 29 > 3 > 602 - 616

Sex allocation theory assumes individual plasticity in maternal strategies, but few studies have investigated within‐individual changes across environments. In house wrens, differences between nests in the degree of hatching synchrony of eggs represent a behavioural polyphenism in females, and its expression varies with seasonal changes in the environment. Between‐nest differences in hatching asynchrony...

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Macronutrient intake regulates sexual conflict in decorated crickets

J. Rapkin, K. Jensen, S. M. Lane, C. M. House, more

Journal of Evolutionary Biology > 29 > 2 > 395 - 406

Sexual conflict results in a diversity of sex‐specific adaptations, including chemical additions to ejaculates. Male decorated crickets (Gryllodes sigillatus) produce a gelatinous nuptial gift (the spermatophylax) that varies in size and free amino acid composition, which influences a female's willingness to fully consume this gift. Complete consumption of this gift maximizes sperm transfer through...

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Female choice for male cuticular hydrocarbon profile in decorated crickets is not based on similarity to their own profile

S. Steiger, A. Capodeanu‐Nägler, S. N. Gershman, C. B. Weddle, more

Journal of Evolutionary Biology > 28 > 12 > 2175 - 2186

Indirect genetic benefits derived from female mate choice comprise additive (good genes) and nonadditive genetic benefits (genetic compatibility). Although good genes can be revealed by condition‐dependent display traits, the mechanism by which compatibility alleles are detected is unclear because evaluation of the genetic similarity of a prospective mate requires the female to assess the genotype...

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Terminal investment in the gustatory appeal of nuptial food gifts in crickets

K. R. Duffield, J. Hunt, J. Rapkin, B. M. Sadd, more

Journal of Evolutionary Biology > 28 > 10 > 1872 - 1881

Investment in current versus future reproduction represents a prominent trade‐off in life‐history theory and is likely dependent on an individual's life expectancy. The terminal investment hypothesis posits that a reduction in residual reproductive value (i.e. potential for future offspring) will result in increased investment in current reproduction. We tested the hypothesis that male decorated crickets...

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Cascading costs of reproduction in female house wrens induced to lay larger clutches

C. J. Hodges, E. K. Bowers, C. F. Thompson, S. K. Sakaluk

Journal of Evolutionary Biology > 28 > 7 > 1383 - 1393

In many species, females produce fewer offspring than they are capable of rearing, possibly because increases in current reproductive effort come at the expense of a female's own survival and future reproduction. To test this, we induced female house wrens (Troglodytes aedon) to lay more eggs than they normally would and assessed the potential costs of increasing cumulative investment in the three...

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Mass‐based condition measures and their relationship with fitness: in what condition is condition?

C. A. Barnett, T. N. Suzuki, S. K. Sakaluk, C. F. Thompson

Journal of Zoology > 296 > 1 > 1 - 5

Mass‐ or body‐size measures of ‘condition’ are of central importance to the study of ecology and evolution, and it is often assumed that differences in condition measures are positively and linearly related to fitness. Using examples drawn from ecological studies, we show that indices of condition frequently are unlikely to be related to fitness in a linear fashion. Researchers need to be more explicit...

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Food fight: sexual conflict over free amino acids in the nuptial gifts of male decorated crickets

S. N. Gershman, J. Hunt, S. K. Sakaluk

Journal of Evolutionary Biology > 26 > 4 > 693 - 704

In decorated crickets, Gryllodes sigillatus, the spermatophore that a male transfers at mating includes a gelatinous spermatophylax that the female consumes, delaying her removal of the sperm‐filled ampulla. Male fertilization success increases with the length of time females spend feeding on the spermatophylax, while females may benefit by prematurely discarding the spermatophylaxes of undesirable...

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SEXUAL SELECTION AFFECTS THE EVOLUTION OF LIFESPAN AND AGEING IN THE DECORATED CRICKET GRYLLODES SIGILLATUS

C. R. Archer, F. Zajitschek, S. K. Sakaluk, N. J. Royle, more

Evolution > 66 > 10 > 3088 - 3100

Recent work suggests that sexual selection can influence the evolution of ageing and lifespan by shaping the optimal timing and relative costliness of reproductive effort in the sexes. We used inbred lines of the decorated cricket, Gryllodes sigillatus, to estimate the genetic (co)variance between age‐dependent reproductive effort, lifespan, and ageing within and between the sexes. Sexual selection...

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Sex‐specific genotype‐by‐environment interactions for cuticular hydrocarbon expression in decorated crickets, Gryllodes sigillatus: implications for the evolution of signal reliability

C. B. Weddle, C. Mitchell, S. K. Bay, S. K. Sakaluk, more

Journal of Evolutionary Biology > 25 > 10 > 2112 - 2125

Phenotypic traits that convey information about individual identity or quality are important in animal social interactions, and the degree to which such traits are influenced by environmental variation can have profound effects on the reliability of these cues. Using inbred genetic lines of the decorated cricket, Gryllodes sigillatus, we manipulated diet quality to test how the cuticular hydrocarbon...

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Give ‘til it hurts: trade‐offs between immunity and male reproductive effort in the decorated cricket, Gryllodes sigillatus

S. N. GERSHMAN, C. A. BARNETT, A. M. PETTINGER, C. B. WEDDLE, more

Journal of Evolutionary Biology > 23 > 4 > 829 - 839

Trade‐offs between life‐history variables can be manifested at either the phenotypic or genetic level, with vastly different evolutionary consequences. Here, we examined whether male decorated crickets (Gryllodes sigillatus) from eight inbred lines and the outbred founder population from which they were derived, trade‐off immune effort [lytic activity, phenoloxidase (PO) activity or encapsulation]...

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Search results for: S. K. Sakaluk

Size of nest‐cavity entrance influences male attractiveness and paternal provisioning in house wrens

The complex interplay between macronutrient intake, cuticular hydrocarbon expression and mating success in male decorated crickets

Multivariate sexual selection on male tegmina in wild populations of sagebrush crickets, Cyphoderris strepitans (Orthoptera: Haglidae)

Within‐female plasticity in sex allocation is associated with a behavioural polyphenism in house wrens

Macronutrient intake regulates sexual conflict in decorated crickets

Female choice for male cuticular hydrocarbon profile in decorated crickets is not based on similarity to their own profile

Terminal investment in the gustatory appeal of nuptial food gifts in crickets

Cascading costs of reproduction in female house wrens induced to lay larger clutches

Mass‐based condition measures and their relationship with fitness: in what condition is condition?

Food fight: sexual conflict over free amino acids in the nuptial gifts of male decorated crickets

SEXUAL SELECTION AFFECTS THE EVOLUTION OF LIFESPAN AND AGEING IN THE DECORATED CRICKET GRYLLODES SIGILLATUS

Sex‐specific genotype‐by‐environment interactions for cuticular hydrocarbon expression in decorated crickets, Gryllodes sigillatus: implications for the evolution of signal reliability

Give ‘til it hurts: trade‐offs between immunity and male reproductive effort in the decorated cricket, Gryllodes sigillatus

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