Preprints (not yet peer-reviewed)

813 downloads
330 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
171 downloads
296 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
105 downloads
294 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
69 downloads
258 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
236 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
56 downloads
172 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
95 downloads
167 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
39 downloads
166 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
19 downloads
229 views

The Glassfrogs (Centrolenidae) are an apparently monophyletic group of Neotropical anurans that includes 136 described species. The phylogenetic relationships of the family with other clades are still poorly understood and at the moment the family can be defined...

["Biodiversity","Taxonomy","Zoology"]
doi:10.7287/peerj.preprints.2180v1
43 downloads
179 views

The diversity and ecology of urban bird communities have been extensively studied in Neartic and Paleartic areas, however, little is known about urban Neotropical areas. Quito, capital city of Ecuador, is located on a highland valley in the megadiverse tropical...

["Biodiversity","Ecology","Ecosystem Science","Zoology"]
doi:10.7287/peerj.preprints.2171v1
53 downloads
211 views

Ecuador has the biggest number of amphibian species per unit of area in the world (427 species in 276,840 km2). Glass frogs (Centrolenidae), with 30 species, constitute 7.06 % of the Ecuadorian anurans. However, the current state of knowledge of this family in...

["Biodiversity","Taxonomy","Zoology"]
doi:10.7287/peerj.preprints.2164v1
141 downloads
363 views

Ecuador has the biggest number of amphibian species per unit of area in the world (425 species in 283,560 km2). In the last decade, conservative estimates indicate that at least 26 species of Ecuadorian amphibians have declined or gone extinct. The reasons for...

["Taxonomy","Zoology"]
doi:10.7287/peerj.preprints.2159v2
52 downloads
182 views

The fish community in the Churince system includes endemic, native and introduced species. Fish diets were analysed in order to evaluate the tropho-dynamics of the community. Nine sampling campaigns were carried out between February 2011 and May 2014, and 556 specimens...

["Biodiversity","Ecology","Zoology"]
doi:10.7287/peerj.preprints.2154v1
59 downloads
251 views

Calcification is one of the most distinctive traits of scleractinian corals. Their hard skeletons form the substratum of reef ecosystems and confer on corals their remarkable diversity of shapes. Corallimorpharians are non-calcifying, close relatives of scleractinian...

["Evolutionary Studies","Taxonomy","Zoology"]
doi:10.7287/peerj.preprints.2151v1
94 downloads
163 views

This experiment was conducted to determine the bioavailability of D-methionine (Met) relative to L-Met for nursery pigs using the slope-ratio assay. A total of 50 crossbred barrows with an initial BW of 13.5 kg (SD = 1.0) were used in an N balance study. A Met-deficient...

["Agricultural Science","Animal Behavior","Veterinary Medicine","Zoology","Nutrition"]
doi:10.7287/peerj.preprints.2130v1
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