Yoni Vortman

Yoni Vortman
Tel-Hai Academic College | telhai · Department of Animal Sciences

PhD

About

29
Publications
6,412
Reads
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418
Citations
Additional affiliations
January 2015 - February 2016
Tel-Hai Academic College
Position
  • Lecturer

Publications

Publications (29)
Preprint
Full-text available
We describe the design and implementation of Vildehaye, a family of versatile, widely-applicable, and field-proven tags for wildlife sensing and radio tracking. The family includes 6 distinct hardware designs for tags, 3 add-on boards, a programming adapter, and base stations; modular firmware for tags and base stations (both standalone low-power e...
Article
Lifjeld's comment provides an opportunity to illustrate the intricacies of the ‘regression to the mean’ (RTM) effect, to clarify the difficulty in teasing apart RTM from allocation bias, and to re‐examine our results in relation to RTM and in the context of related evidence. Here, we show that: a) The correlations between paternity change and initi...
Article
The role of microbiome in shaping animal’s behavior is well established. Accordingly, the use of antibiotics may have profound effects on behavior, which are seldom examined. Recently, the symbiotic magnetic-sensing hypothesis has been forwarded as a mechanistic explanation for the phenomenon of animal magnetoreception. It suggests a symbiotic rela...
Preprint
Testosterone plays a critical role in mediating fitness-related traits in many species. Although it is highly responsive to environmental and social conditions, evidence from several species show a heritable component to its individual variation. Despite the known effects that in utero testosterone exposure have on adult fitness, the heritable comp...
Article
Full-text available
Animal vocal communication is a broad and multi-disciplinary field of research. Studying various aspects of communication can provide key elements for understanding animal behavior, evolution, and cognition. Given the large amount of acoustic data accumulated from automated recorders, for which manual annotation and analysis is impractical, there i...
Article
The identity of a magnetic sensor in animals remains enigmatic. Although the use of the geomagnetic field for orientation and navigation in animals across a broad taxonomic range has been well established over the past five decades, the identity of the magnetic-sensing organ and its structure and/or apparatus within such animals remains elusive—‘a...
Article
Many closely related populations are distinguished by variation in sexual signals and this variation is hypothesized to play an important role in reproductive isolation and speciation. Within populations, there is considerable evidence that sexual signals provide information about the incidence and severity of parasite infections, but it remains un...
Preprint
Full-text available
Magnetoreception is a sense that allows the organism to perceive and act according to different parameters of the magnetic field. This magnetic sense plays a part in many fundamental processes in various living organisms. Much effort was expended in finding the ‘magnetic sensor’ in animals. While some experiments show a role of the ophthalmic nerve...
Article
Full-text available
Global warming alters various avian phenological processes, including advanced reproduction and migration schedules. In birds, individual appearance is largely determined by plumage, influencing, for example, bird attractiveness, social status and camouflage. Juveniles of most passerine species replace their nest-grown plumage during the first mont...
Conference Paper
Animal vocalizations are ubiquitous, produced by various taxa and represented in all habitats. Tracking and quantifying animal vocalizations is a basic necessity in various biological disciplines such as nature conservation and biomonitoring. With the advancement of digital recording technology, a huge amount of audio recordings is accumulated. Sin...
Article
Neighboring fetuses may impact their siblings in various respects, depending on their in utero location and sex. The effects of the intrauterine position (IUP) are widely studied in model organisms, especially laboratory bred murine strains that are characterized by short gestations and altricial offspring. In some species, the proximity to a male...
Conference Paper
Animal communication and specifically acoustic communication is in the focus of ecological and biological research. With the advancement of monitoring technology, a vast amount of acoustic recordings of birds is continuously accumulated. As manual segmentation and annotation of this data is impractical, development of efficient algorithms for accur...
Article
Full-text available
Population sex ratios naturally fluctuate around equality. It is argued that the production of an equal number of male and female offspring by individual parents should be favoured by selection, if all costs and benefits are equal. Theoretically, an even sex ratio should yield the highest probability for a fetus to be adjacent to a fetus of the opp...
Article
Full-text available
Under various ecological conditions, producing a biased sex ratio may be adaptive. However, the factors that translate specific ecological conditions into internal processes remain an enigma. A potential mediator is maternal testosterone, which may reflect physical, reproductive, and social conditions. The nutria (Myocastor coypus) is a polygynous...
Article
Full-text available
The ability to sense Earth’s magnetic field has evolved in various taxa. However, despite great efforts to find the ‘magnetic-sensor’ in vertebrates, the results of these scientific efforts remain inconclusive. A few decades ago, it was found that bacteria, known as magnetotactic bacteria (MTB), can move along a magnetic field using nanometric chai...
Article
Full-text available
Sexual selection plays a key role in the diversification of numerous animal clades and may accelerate trait divergence during speciation. However, much of our understanding of this process comes from phylogenetic comparative studies, which rely on surrogate measures such as dimorphism that may not represent selection in wild populations. In this st...
Article
Previous studies have shown that sexual signals can rapidly diverge among closely related species. However, we lack experimental studies to demonstrate that differences in trait-associated reproductive performance maintain sexual trait differences between the two closely related populations, in support for a role of sexual selection in speciation....
Article
Population divergence in geographic isolation is due to a combination of factors. Natural and sexual selection may be important in shaping patterns of population differentiation, a pattern referred to as 'Isolation by Adaptation' (IBA). IBA can be complementary to the well-known pattern of 'Isolation by Distance' (IBD), in which the divergence of c...
Article
Full-text available
The level of expression of sexually selected traits is generally determined by genes, environment and their interaction. In species that use multiple sexual signals which may be costly to produce, investing in the expression of one sexual signal may limit the expression of the other, favoring the evolution of a strategy for resource allocation amon...
Article
Full-text available
We describe the design, manufacture, and deployment of advanced wildlife tracking tags (transmitters) based on integrated transceivers. The tags weigh as little as 2g and cost less than $20 each in relatively small quantities (tens).
Article
Full-text available
Abstract Sexual trait divergence has been shown to play a role in the evolution of reproductive isolation. While variation in multiple sexual signals is common among closely related species, little is known about the role of these different axes of phenotype variation with respect to the evolution of behavioral reproductive isolation. Here we study...
Article
Full-text available
Spermatozoa vary greatly in size and shape among species across the animal kingdom. Postcopulatory sexual selection is thought to be the major evolutionary force driving this diversity. In contrast, less is known about how sperm size varies among populations of the same species. Here, we investigate geographic variation in sperm size in barn swallo...
Article
Full-text available
Recent studies of several species have reported a latitudinal cline in the circadian clock gene, Clock, which influences rhythms in both physiology and behavior. Latitudinal variation in this gene may hence reflect local adaptation to seasonal variation. In some bird populations, there is also an among-individual association between Clock poly-Q ge...
Article
Full-text available
Speciation processes are largely determined by the relative strength of divergent selection versus the magnitude of gene flow. The barn swallow (Hirundo rustica) has a broad geographic distribution that encompasses substantial geographic variation in morphology and behavior. The European (H. r. rustica) and East-Mediterranean (H. r. transitiva) sub...
Article
Full-text available
The differential functions of distinct morphological traits as sexual signals among closely related populations are associated with a potential role of sexual selection in population divergence and speciation. The cosmopolitan barn swallow Hirundo rustica complex consists of 6 subspecies, which differ substantially in tail streamer length and ventr...

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