The view of maternal effects (non-genetic maternal environmental influence on offspring phenotype) has changed from one of distracting complications in evolutionary genetics to an important evolutionary mechanism for improving offspring fitness. Recent studies have shown that maternal effects act as an adaptive mechanism to prepare offspring for stressful environments. Although research into the magnitude of maternal effects is abundant, the molecular mechanisms of maternal influences on offspring phenotypic variation are not fully understood. Despite recent...
Data from: Pop‐off data storage tags reveal niche partitioning between native and non‐native predators in a novel ecosystemGraham D. Raby, Timothy B. Johnson, Steven T. Kessel, Thomas J. Stewart & Aaron T. Fisk
1. Niche partitioning might be predicted to be particularly dynamic in ‘novel ecosystems’ characterized by human-altered environmental conditions and biological invasions. Restoration efforts for native species in such systems can be informed by detailed characterization of niche partitioning. 2. In Lake Ontario, fishery management agencies have been engaged in a long-term struggle to restore native top predators including lake trout (Salvelinus namaycush). Meanwhile, management agencies continue to stock non-native species like Chinook salmon (Oncorhynchus tshawytscha)...
Data from: Genetic population structure and demography of an apex predator, the tiger shark Galeocerdo cuvierAgathe Pirog, Sebastien Jaquemet, Virginie Ravigné, Geremy Cliff, Eric Clua, Bonnie J. Holmes, Nigel E. Hussey, John E.G. Nevill, Andrew J. Temple, Per Berggren, Laurent Vigliola & Hélène Magalon
Population genetics have been increasingly applied to study large sharks over the last decade. Whilst large shark species are often difficult to study with direct methods, improved knowledge is needed for both population management and conservation, especially for species vulnerable to anthropogenic and climatic impacts. The tiger shark, Galeocerdo cuvier, is an apex predator known to play important direct and indirect roles in tropical and sub-tropical marine ecosystems. While the global and Indo-West Pacific population...
Data from: Non-native species spread in a complex network: the interaction of global transport and local population dynamics determines invasion successHanno Seebens, Elizabeta Briski, Sara Ghabooli, Tamara Shiganova, Hugh MacIsaac & Bernd Blasius
The number of released individuals, which is a component of propagule pressure, is considered to be a major driver for the establishment success of non-native species. However, propagule pressure is often assumed to result from single or few release events, which does not necessarily apply to the frequent releases of invertebrates or other taxa through global transport. For instance, the high intensity of global shipping may result in frequent releases of large numbers of individuals,...
Data from: Social group signatures in hummingbird displays provide evidence of co-occurrence of vocal and visual learningMarcelo Araya-Salas, Grace Smith-Vidaurre, Daniel J. Mennill, Paulina L. González-Gómez, James Cahill & Timothy F. Wright
Vocal learning, in which animals modify their vocalizations based on social experience, has evolved in several lineages of mammals and birds, including humans. Despite much attention, the question of how this key cognitive trait has evolved remains unanswered. The motor theory for the origin of vocal learning posits that neural centers specialized for vocal learning arose from adjacent areas in the brain devoted to general motor learning. One prediction of this hypothesis is that visual...
Data from: Male and female Rufous-and-white Wrens do not match song types with same-sex rivals during simulated territorial intrusionsChristopher Moser-Purdy, Zachary A. Kahn, Brendan A. Graham & Daniel J. Mennill
In birds with song repertoires, song-type matching occurs when an individual responds to another individual’s song by producing the same song type. Song-type matching has been described in multiple bird species and a growing body of evidence suggests that song-type matching may serve as a conventional signal of aggression, particularly in male birds in the temperate zone. Few studies have investigated song-type matching in tropical birds or female birds, in spite of the fact that...
To improve survival during winter, temperate species use a variety of behavioural and physiological adaptations. Among songbirds, the maintenance of lipid reserves is a widely-used strategy to cope with the severity of winter; however, little is known regarding how multiple synchronously acting environmental mechanisms work together to drive these effects. In a context where temperate winter conditions are becoming more variable, it is important to widen our understanding regarding the flexible adaptations that may allow...
Data from: Variation in juvenile Chinook salmon (Oncorhynchus tshawytscha) transcription among and within eight population crosses from British Columbia, CanadaShelby D. Toews, Kyle W. Wellband, Brian Dixon & Daniel D. Heath
Phenotypic differences among populations within a species have been reported for a variety of traits, ranging from life history to physiology to gene transcription. Population-level phenotypic variation has been attributed to genetic differences resulting from genetic drift and/or local adaptation as well as environmental differences resulting from plasticity. We studied population- and family-level variation in gene transcription for 22 fitness-related genes, comprising immune, growth, metabolic, and stress processes in Chinook salmon (Oncorhynchus tshawytscha). We created...
University of Windsor8
New Mexico State University1
University of Queensland1
PSL Research University1
University of Waterloo1
Senckenberg Biodiversity and Climate Research Centre1
French National Centre for Scientific Research1
GEOMAR Helmholtz Centre for Ocean Research Kiel1
Ontario Ministry of Natural Resources1