• Publications
  • Influence
The relationship between fitness and baseline glucocorticoids in a passerine bird.
TLDR
A positive relationship between baseline cort and fitness components during the nestling period suggests that reproductive investment may elicit higher cort levels that feedback to reallocate more effort to reproduction during critical periods of nestling provisioning. Expand
Disrupting evolutionary processes: The effect of habitat fragmentation on collared lizards in the Missouri Ozarks
TLDR
The general impact of human activities on genetic diversity disrupts or diminishes the capacity for adaptation, speciation, and macroevolutionary change, which will ultimately diminish biodiversity at all levels. Expand
Breeding behavior and reproductive success of Cerulean Warblers in southeastern Ontario
TLDR
The breeding behavior of Cerulean Warblers at three different sites in southeastern Ontario through the breeding season, from early May to late July 1995, and at one of the above sites in 1994, found reproductive success in this population was high in both years. Expand
The stress of parenthood? Increased glucocorticoids in birds with experimentally enlarged broods
TLDR
It is demonstrated that increased reproductive demand can cause increased baseline cort, and the positive relationship between parental behaviour and cort suggests that increased cort does not always interfere with reproductive investment, and might instead facilitate it. Expand
Immune Defense and Host Sociality: A Comparative Study of Swallows and Martins
TLDR
It is shown that the impact of parasites on host reproductive success was positively associated with the degree of sociality in the bird family Hirundinidae, however, the cost of parasitism in highly colonial species was countered by high levels of T‐ and B‐cell immune responses. Expand
Confidence of Paternity and Male Parental Care
TLDR
The model illustrates that the relationship between male parental care and paternity is more complex than assumed previously and a predicted adjustment ofmale parental care in response to paternity must be examined in relation to the effect of female parental care on offspring recruitment and the effect on alternative activities on male fitness. Expand
Extra-pair paternity in monogamous tree swallows
TLDR
There was no relationship between the pair copulation rate and the proportion of illegitimate young in a brood, suggesting that males cannot use the number of copulations performed with their mate as a reliable cue to their share of paternity. Expand
Intraspecific Variation in Sperm Length is Negatively Related to Sperm Competition in Passerine Birds
TLDR
It is demonstrated, by using phylogenetic comparative methods, that between-male variation in sperm length within species is closely and negatively linked to the risk of sperm competition, and this relationship was even stronger when only considering species in which data on sperm length and extrapair paternity originated from the same populations. Expand
MINIMUM ESTIMATES OF SURVIVAL AND POPULATION GROWTH FOR CERULEAN WARBLERS (DENDROICA CERULEA) BREEDING IN ONTARIO, CANADA
TLDR
It appears that the study population, thought to be one of the healthiest known for this species, may not be currently reproducing at a high enough rate to accommodate adult mortality, and caution must be used when interpreting results, given the possibility of underestimating survival and fecundity of this species. Expand
Extrapair paternity and egg hatchability in tree swallows: evidence for the genetic compatibility hypothesis?
TLDR
Using microsatellite DNA fingerprinting, extrapair paternity in relation to nesting success and male, female, and offspring characteristics is studied in tree swallows to find evidence that females have control over who fathers their offspring. Expand
...
1
2
3
4
5
...