Data from: Genetic admixture predicts parasite intensity: evidence for increased hybrid performance in Darwin’s tree finchesKatharina J. Peters, Christine Evans, J. David Aguirre & Sonia Kleindorfer
Hybridisation can increase adaptive potential when enhanced genetic diversity or novel genetic combinations confer a fitness advantage, such as in the evolution of anti-parasitic mechanisms. Island systems are especially susceptible to invasive parasites due to the lack of defence mechanisms that usually coevolve in long-standing host-parasite relationships. We test if host genetic admixture affects parasite numbers in a novel host-parasite association on the Galápagos Islands. Specifically, we compare the number of Philornis downsi in nests...
Data from: Climate‐driven shifts in the distribution of koala browse species from the Last Interglacial to the near futureFarzin Shabani, Mohsen Ahmadi, Katharina J. Peters, Simon Haberle, Antoine Champreux, Frédérik Saltré & Corey J. A. Bradshaw
The koala's (Phascolarctos cinereus) distribution is currently restricted to eastern and south‐eastern Australia. However, fossil records dating from 70 ± 4 ka (ka = 103 years) from south‐western Australia and the Nullarbor Plain are evidence of subpopulation extinctions in the southwest at least after the Last Interglacial (128‐116 ka). We hypothesize that koala sub‐population extinctions resulted from the eastward retraction of the koala's main browse species in response to unsuitable climatic conditions. We further posit...
Data from: Introduced parasite changes host phenotype, mating signal and hybridisation risk: Philornis downsi effects on Darwin’s finch songSonia Kleindorfer, Georgina Custance, Katharina Peters & Frank J. Sulloway
Introduced parasites that alter their host’s mating signal can change the evolutionary trajectory of a species through sexual selection. Darwin’s Camarhynchus finches are threatened by the introduced fly Philornis downsi that is thought to have accidentally arrived on the Galapagos Islands during the 1960s. The P. downsi larvae feed on the blood and tissue of developing finches causing on average ~55 % in-nest mortality and enlarged naris size in survivors. Here we test if enlarged...
Data from: Low food availability during gestation enhances offspring post-natal growth, but reduces survival, in a viviparous lizardThomas Botterill-James, Kirke L. Munch, Ben Halliwell, David G. Chapple, Michael G. Gardner, Erik Wapstra & Geoffrey M. While
The environment experienced by a mother can have profound effects on the fitness of her offspring (i.e., maternal effects). Maternal effects can be adaptive when the developmental environments experienced by offspring promote phenotypes that provide fitness benefits either via matching offspring phenotype to the post-developmental environment (also known as anticipatory maternal effects) or through direct effects on offspring growth and survival. We tested these hypotheses in a viviparous lizard using a factorial experimental design in...
The morphological diversity of the quadrate bone in squamate reptiles as revealed by high-resolution computed tomography and geometric morphometricsAlessandro Palci, Michael Caldwell, Mark Hutchinson, Takuya Konishi & Michael Lee
We examined the morphological diversity of the quadrate bone in squamate reptiles (i.e. lizards, snakes, amphisbaenians). The quadrate is the principal splanchnocranial element involved in suspending the lower jaw from the skull, and its shape is of particular interest because it is potentially affected by several factors, such as phylogenetic history, allometry, ecology, skull kinesis and hearing capabilities (e.g. presence or absence of a tympanic ear). Due to its complexity, the quadrate bone is also...
Data from: Genetic relatedness delineates the social structure of southern Australian bottlenose dolphinsFernando Diaz-Aguirre, Guido J. Parra, Cecilia Passadore & Luciana Möller
Social relationships represent an adaptive behavioural strategy that can provide fitness benefits to individuals. Within mammalian societies, delphinids are known to form diverse grouping patterns and show a variety of social systems. However, how ecological and intrinsic factors have shaped the evolution of such diverse societies is still not well understood. In this study we used photo-identification data and biopsy samples collected between March 2013 and October 2015 in Coffin Bay, a heterogeneous environment in...
Intraspecific genetic structure in widely distributed marine species often mirrors the boundaries between temperature-defined bioregions. This suggests that the same thermal gradients that maintain distinct species assemblages also drive the evolution of new biodiversity. Ecological speciation scenarios are often invoked to explain such patterns, but the fact that adaptation is usually only identified when phylogenetic splits are already evident makes it impossible to rule out the alternative scenario of allopatric speciation with subsequent adaptation. We...
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Swiss Federal Institute for Forest, Snow and Landscape Research1
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