Preprints (not yet peer-reviewed)

51 downloads
198 views

Background. Digitigraded mammals, e.g. dogs and cats, stand or walk on their digits or toes. Their paw pads beneath the digits or toes, rather than the entire sole of the foot, are in contact with the ground surface during locomotion. Digitigrades generally move...

["Animal Behavior","Zoology"]
doi:10.7287/peerj.preprints.2340v1
204 downloads
625 views

Background. The estimation of body mass of long extinct species of the family Felidae has been a focus of paleontology. However, most utilized methods impose expected proportions on the fossil specimens being estimated, resulting in a high chance of underestimation...

["Paleontology","Zoology"]
doi:10.7287/peerj.preprints.2327v2
28 downloads
119 views

Dive duration in air-breathing vertebrates is thought to be constrained by the volume of oxygen stored in the body and the rate at which it is consumed (i.e., “o xygen store/usage hypothesis” ). The body mass-dependence of dive duration among endothermic vertebrates...

["Ecology","Zoology"]
doi:10.7287/peerj.preprints.2334v1
31 downloads
338 views

Annually, over 180 million people visit zoos accredited by the Association of Zoos and Aquariums (AZA), giving them the chance to see a variety of primate species and to learn about their behavior and ecology. In the past decade, some zoos have also become increasingly...

["Animal Behavior","Zoology"]
doi:10.7287/peerj.preprints.2312v1
42 downloads
286 views

Winter mortality is a major factor regulating population size of the mountain pine beetle, Dendroctonus ponderosae Hopkins (Coleoptera: Curculionidae). Glycerol is the major cryoprotectant in this freeze intolerant insect. We report findings from a gene expression...

["Ecology","Entomology","Molecular Biology","Zoology"]
doi:10.7287/peerj.preprints.2311v1
58 downloads
266 views

Chimpanzees have the largest relative brain size, greatest reproductive output, and longest lifespan of any non-human ape; they also have the highest level of physical activity in the wild, as measured by daily walking and climbing distances. In this study, we...

["Anthropology","Ecology","Evolutionary Studies","Veterinary Medicine","Zoology"]
doi:10.7287/peerj.preprints.2307v1
35 downloads
399 views

Studies documenting Human-Induced Rapid Evolutionary Change (HIREC) routinely compare contemporary allele or morph frequency distributions with historical baselines. All too often, this involves the re-sampling of a population that was sampled at a single time...

["Environmental Sciences","Evolutionary Studies","Zoology"]
doi:10.7287/peerj.preprints.2304v1
818 downloads
338 views

Zebrafish (Danio rerio) have emerged as a popular model for studying pharmacological effects on behavior and anxiety. While there have been numerous studies documenting the anxiolytic and anxiogenic effects of common drugs in zebrafish, many do not report or test...

["Animal Behavior","Zoology","Pharmacology"]
doi:10.7287/peerj.preprints.1718v3
180 downloads
304 views

How does nonhuman primate innovation compare to our own? Many primates innovate, for example to get otherwise inaccessible food or to increase their social standing, and nonhuman primate innovation can be broken into three component steps. It begins with the initial...

["Animal Behavior","Anthropology","Neuroscience","Zoology"]
doi:10.7287/peerj.preprints.2276v1
112 downloads
316 views

Musk secretion in male musk deer is regarded as a propitious mode of sexual election to attract a greater number of females. However, the genetic mechanisms of musk secretion are still poorly understood and unresolved making it necessary to elucidate the possible...

["Agricultural Science","Bioinformatics","Genetics","Genomics","Zoology"]
doi:10.7287/peerj.preprints.2252v1
71 downloads
263 views

We present the first record of the orb-weaver spider Bertrana striolata from Amazonian lowlands (east of the Andes) in Ecuador, based on a specimen collected at the Tiputini Biodiversity Station, province of Orellana, Ecuador. In Ecuador, B. striolata was previously...

["Biodiversity","Biogeography","Entomology","Zoology"]
doi:10.7287/peerj.preprints.2242v1
106 downloads
243 views

Advances in biodiversity genomic sequencing will increasingly depend on the availability of DNA samples—and their quantifiable metadata—preserved in large institutional biorepositories that are discoverable to the scientific community. Improvements in sequencing...

["Biodiversity","Bioinformatics","Genomics","Molecular Biology","Zoology"]
doi:10.7287/peerj.preprints.2202v1
60 downloads
179 views

The material collected during a Spanish, multi-year expedition to the Neotropics in the 1860s was described by J.G. Hidalgo in the ‘Moluscos del Viaje al Pacifico’. Correspondence between Hidalgo and H. Crosse reveals how part of the material collected by the ‘Comisión...

["Taxonomy","Zoology"]
doi:10.7287/peerj.preprints.2193v1
97 downloads
169 views

Flies use specialized photoreceptors R7 and R8 in the dorsal rim area (DRA) to detect skylight polarization. R7 and R8 form a tiered waveguide (rhabdom) with R7 on top, filtering light delivered to R8. We examine how the division of a given resource, rhabdom length,...

["Animal Behavior","Biophysics","Mathematical Biology","Neuroscience","Zoology"]
doi:10.7287/peerj.preprints.2192v1
42 downloads
183 views

La Plata Island, Machalilla National Park, is located 30 km off the Ecuadorian coast. In June 2000, I surveyed the avifauna of La Plata Island. In total I observed 57 species of birds (25 families). At least 17 species are known to breed on the island; in fact,...

["Biodiversity","Zoology"]
doi:10.7287/peerj.preprints.2181v1
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