Peer-reviewed Articles

22 downloads
140 views

Introduction Aquatic oligochaetes represent valuable indicators of the quality of sediments of watercourses and lakes, but their difficult identification based on morphological criteria compromises their more common use for eco-diagnostic analyses. This issue could...

["Biodiversity","Ecology","Genetics","Taxonomy","Zoology"]
doi:10.7717/peerj.4122
138 downloads
1,285 views

Our knowledge about the body morphology of many extinct early vertebrates is very limited, especially in regard to their post-thoracic region. The prompt disarticulation of the dermo-skeletal elements due to taphonomic processes and the lack of a well-ossified...

["Ecology","Paleontology","Zoology"]
doi:10.7717/peerj.4081
32 downloads
372 views

Infrared thermal imaging has emerged as a valuable tool in veterinary medicine, in particular for evaluating reproductive processes. Here, we explored differences in skin temperature of twenty female chimpanzees in Budongo Forest, Uganda, four of which were pregnant...

["Animal Behavior","Zoology"]
doi:10.7717/peerj.4116
38 downloads
324 views

Communicative traits are strikingly diverse and may vary among populations of the same species. Within a population, these traits may also display seasonal variation. Chemical signals play a key role in the communication of many taxa. However, we still know far...

["Biodiversity","Ecology","Zoology","Climate Change Biology"]
doi:10.7717/peerj.3992
75 downloads
410 views

Background The deep-sea hydrothermal vent is one of the most ‘extreme’ environments in the marine realm. Few species are capable of inhabiting such ecosystems, despite extremely high productivity there supported by microbial chemosynthesis, leading to high biomass...

["Biodiversity","Ecology","Marine Biology","Taxonomy","Zoology"]
doi:10.7717/peerj.4121
67 downloads
332 views

Information about the distribution and abundance of the habitat-forming sessile organisms in marine ecosystems is of great importance for conservation and natural resource managers. Spatial interpolation methodologies can be useful to generate this information...

["Conservation Biology","Ecology","Ecosystem Science","Marine Biology","Zoology"]
doi:10.7717/peerj.4078
55 downloads
349 views

The Pacific longnose parrotfish Hipposcarus longiceps (Valenciennes 1840) represents a prime fishery resource throughout much of the tropical Pacific. In this study, we sampled the species from the Guam commercial fishery market across five consecutive years to...

["Aquaculture, Fisheries and Fish Science","Marine Biology","Zoology","Natural Resource Management"]
doi:10.7717/peerj.4079
97 downloads
773 views

The latitudinal distributions in Devonian–Cretaceous ammonoids were analyzed at the genus level, and were compared with the hatchling sizes (i.e., ammonitella diameters) and the geological durations. The results show that (1) length of temporal ranges of ammonoids...

["Evolutionary Studies","Marine Biology","Paleontology","Zoology"]
doi:10.7717/peerj.4108
104 downloads
530 views

The effects of ice ages on speciation have been well documented for many European and North American taxa. In contrast, very few studies have addressed the consequences of such environmental and topographical changes in North East Asian species. More precisely,...

["Biodiversity","Biogeography","Zoology"]
doi:10.7717/peerj.4044
127 downloads
1,035 views

Background Life history theory predicts that mothers should adjust reproductive investment depending on benefits of current reproduction and costs of reduced future reproductive success. These costs and benefits may in turn depend on the breeding female’s social...

["Animal Behavior","Ecology","Evolutionary Studies","Zoology"]
doi:10.7717/peerj.4028
34 downloads
219 views

Insulin-like growth factor 2 (IGF2) and dopamine receptor 2 (DRD2) play important roles in ovarian follicular development. In this study, we analyzed tissue-specific expression of the Muscovy duck IGF2 and DRD2 genes and cloned those genes transcripts. Polymorphisms...

["Genetics","Zoology"]
doi:10.7717/peerj.4083
169 downloads
2,025 views

Convergent evolution can provide insights into the predictability of, and constraints on, the evolution of biodiversity. One striking example of convergence is seen in the ‘river dolphins’. The four dolphin genera that make up the ‘river dolphins’ (Inia geoffrensis,...

["Evolutionary Studies","Taxonomy","Zoology"]
doi:10.7717/peerj.4090
42 downloads
495 views

Background Laying hens are often kept in barn or free-range systems where they must negotiate level changes in the house to access resources. However, collisions and resultant keel fractures are commonplace. Producers sometimes add ramps to make raised areas more...

["Animal Behavior","Zoology"]
doi:10.7717/peerj.4069
76 downloads
333 views

Morphological differentiation among closely related species provides opportunities to study mechanisms shaping natural phenotypic variation. Here, we address variation in the orientation of melanin-colored body stripes in three cichlid species of the tribe Haplochromini....

["Aquaculture, Fisheries and Fish Science","Biodiversity","Evolutionary Studies","Molecular Biology","Zoology"]
doi:10.7717/peerj.4080
69 downloads
1,422 views

Hörnig, Haug & Haug (2017) published a description of a new specimen of Santanmantis axelrodi MB.I.2068, an extinct species of praying mantis from the Crato Formation of Brazil. According to Hörnig, Haug & Haug (2017), the discovery of this new specimen brought...

["Evolutionary Studies","Paleontology","Zoology"]
doi:10.7717/peerj.4046

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