Total of 119 results Filter on subject area
zoology
31 downloads
77 views

The present study assesses swimbladder dynamics in natural occurring sardine, Sardina pilchardus, populations with the aim to examine whether this is affected by bathymetric positioning and the physiological state of the individuals. To do so, swimbladder size...

["Aquaculture, Fisheries and Fish Science","Marine Biology","Zoology"]
doi:10.7717/peerj.892
126 downloads
434 views

Whale sharks Rhincodon typus are globally threatened, but a lack of biological and demographic information hampers an accurate assessment of their vulnerability to further decline or capacity to recover. We used laser photogrammetry at two aggregation sites to...

["Conservation Biology","Ecology","Marine Biology","Zoology"]
doi:10.7717/peerj.886
548 downloads
138 views

Sloths are considered to have one of the lowest mass-specific metabolic rates of any mammal and, in tandem with a slow digestive rate, have been theorized to have correspondingly low rates of ingestion. Here, we show in a study conducted over five months, that...

["Animal Behavior","Ecology","Zoology"]
doi:10.7717/peerj.875
55 downloads
226 views

Reports on reddish carotenoid-based ornaments in female three-spined sticklebacks (Gasterosteus aculeatus) are few, despite the large interest in the species’ behaviour, ornamentation, morphology and evolution. We sampled sticklebacks from 17 sites in north-western...

["Animal Behavior","Aquaculture, Fisheries and Fish Science","Evolutionary Studies","Zoology"]
doi:10.7717/peerj.872
69 downloads
277 views

We describe a Mesozoic fish Paralycoptera sp. (Teleostei: Osteoglossoidei), on the basis of a postcranial skeleton collected from the volcaniclastic mudstones of the Lai Chi Chong Formation of Hong Kong, China. The new finding—representing the city’s first Mesozoic...

["Aquaculture, Fisheries and Fish Science","Evolutionary Studies","Paleontology","Taxonomy","Zoology"]
doi:10.7717/peerj.865
55 downloads
137 views

The study of animal movement commonly requires the segmentation of continuous data streams into individual strides. The use of forceplates and foot-mounted accelerometers readily allows the detection of the foot-on and foot-off events that define a stride. However,...

["Animal Behavior","Bioengineering","Veterinary Medicine","Zoology","Computational Science"]
doi:10.7717/peerj.783
49 downloads
189 views

The current study highlights some knowledge on the diversity and structure of insect communities and trophic groups living in Sabkha Djendli (semi-arid area of Northeastern Algeria). The entomofauna was monthly sampled from March to November 2006 using pitfall...

["Biodiversity","Ecology","Ecosystem Science","Entomology","Zoology"]
doi:10.7717/peerj.860
54 downloads
208 views

Insects have been used as an exemplary model in studying longevity, from extrinsic mortality pressures to intrinsic senescence. In the highly eusocial insects, great degrees of variation in lifespan exist between morphological castes in relation to extreme divisions...

["Animal Behavior","Ecology","Entomology","Evolutionary Studies","Zoology"]
doi:10.7717/peerj.848
74 downloads
200 views

The mandibles of caridean shrimps have been widely studied in the taxonomy and functional biology of the group. Within the Palaemonoidea the mandibles reach a high level of structural diversity reflecting the diverse lifestyles within the superfamily. However,...

["Biodiversity","Marine Biology","Taxonomy","Zoology"]
doi:10.7717/peerj.846
113 downloads
351 views

A distinguishing characteristic of genes that code for the major histocompatibility complex (MHC) is that alleles often share more similarity between, rather than within species. There are two likely mechanisms that can explain this pattern: convergent evolution...

["Evolutionary Studies","Genetics","Molecular Biology","Zoology","Immunology"]
doi:10.7717/peerj.853
306 downloads
516 views

The mammalian order Lagomorpha has been the subject of many morphometric studies aimed at understanding the relationship between form and function as it relates to locomotion, primarily in postcranial morphology. The leporid cranial skeleton, however, may also...

["Ecology","Zoology","Anatomy and Physiology"]
doi:10.7717/peerj.844
230 downloads
702 views

Quantitative morphometric analyses, particularly ontogenetic allometry, are common methods used in quantifying shape, and changes therein, in both extinct and extant organisms. Due to incompleteness and the potential for restricted sample sizes in the fossil record,...

["Evolutionary Studies","Paleontology","Zoology","Statistics"]
doi:10.7717/peerj.818
91 downloads
283 views

Torsional loading is a common feature of skeletal biomechanics during vertebrate flight. The importance of resisting torsional loads is best illustrated by the convergence of wing bone structure (e.g., long with thin walls) across extant bats and birds. Whether...

["Zoology","Anatomy and Physiology","Histology"]
doi:10.7717/peerj.823
191 downloads
768 views

In August 2013, we observed a high incidence (44%) of synchronous bands of reduced melanin (a type of fault bar we have termed “pallid bands”) across the rectrices of juvenile Grasshopper Sparrows (Ammodrammus savannarum) captured near El Reno, Oklahoma. Earlier...

["Conservation Biology","Ecology","Zoology"]
doi:10.7717/peerj.814
82 downloads
263 views

Rapid morphological change has been shown in rodent populations on islands, including endemic deer mice (Peromyscus maniculatus subspp.) on the California Channel Islands. Surprisingly, most of these changes were towards a smaller size. Black rats were introduced...

["Biodiversity","Conservation Biology","Ecology","Evolutionary Studies","Zoology"]
doi:10.7717/peerj.812

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