Results 61 to 70 of about 341,884 (242)

Broadening the semiaquatic scene: Quantification of long bone microanatomy across pinnipeds

The Anatomical Record, EarlyView.
Abstract Investigations of bone microanatomy are commonly used to explore lifestyle strategies in vertebrates. While distinct microanatomical limb bone features have been established for exclusively aquatic and terrestrial lifestyles, identifying clear patterns for the semiaquatic lifestyle remains more challenging.
Apolline Alfsen, Christian de Muizon, Olivier Lambert, Giovanni Bianucci, Antonia R. Kaffler, Matthew R. McCurry, Alexandra Houssaye, Rafael M. Varas‐Malca, Rodolfo Salas‐Gismondi, Oliver Hampe, Eli Amson   +10 more
wiley   +1 more source

A detailed redescription of a skeletally immature ‘Redondasaurus’ suggests ontogenetic transformations in the taxon mirror phytosaurian morphological evolution

The Anatomical Record, EarlyView.
Abstract The study of morphological evolution is fundamentally tied to ontogeny, yet studies of these heterochronic processes in the fossil record are rare. Fossils belonging to an ontogenetic series are difficult to assign to an ontogenetic stage due to inconsistent proxies for skeletal ages, challenging to taxonomically assign due to morphological ...
Erika R. Goldsmith, Michelle R. Stocker
wiley   +1 more source

3D anatomical atlas of the heads of male and female adult Chamaeleo calyptratus

The Anatomical Record, EarlyView.
The veiled chameleon is a model organism in reptile development research. Utilizing contrast‐enhanced microCT and deep learning segmentation models, we have generated the first digital atlases of the skull, nervous system, cranial muscles and hyolingual muscles.
Alice Leavey, Eloy Gálvez‐López, Anthony Herrel, Laura B. Porro   +3 more
wiley   +1 more source

Stronger interspecific sexual differences may be favored when females search for mates in the presence of congeners

Current Research in Insect Science
Why are some species sexually dimorphic while other closely related species are not? While all females in genus Strauzia share a multiply-banded wing pattern typical of many other true fruit flies, males of four species have noticeably elongated wings ...
Alaine C. Hippee, Marc A. Beer, Allen L. Norrbom, Andrew A. Forbes   +3 more
doaj   +1 more source

Sex‐dependent and sex‐independent regulatory systems of size variation in natural populations

Molecular Systems Biology, 2019
Size of organs/organisms is a polygenic trait. Many of the growth‐regulatory genes constitute conserved growth signaling pathways. However, how these multiple genes are orchestrated at the systems level to attain the natural variation in size including ...
Hirokazu Okada, Ryohei Yagi, Vincent Gardeux, Bart Deplancke, Ernst Hafen   +4 more
doaj   +1 more source

Sexual size dimorphism and sex determination by morphometric measurements in locally adapted muscovy duck (Cairina moschata) in Nigeria

Acta Agriculturae Slovenica, 2014
Sexual size dimorphism (SSD) is a common phenomenon in most mammalian and poultry species. This study was undertaken to investigate SSD in nondescript locally adapted Muscovy ducks in Nigeria by applying descriptive analysis, sexual dimorphism index (SDI)
Abel Olusegun OGUNTUNJI, Kolawole Luke AYORINDE   +1 more
doaj   +1 more source

Aphid wing dimorphisms: linking environmental and genetic control of trait variation [PDF]

Philosophical Transactions of the Royal Society B: Biological Sciences, 2010
Both genetic and environmental factors underlie phenotypic variation. While research at the interface of evolutionary and developmental biology has made excellent advances in understanding the contribution of genes to morphology, less well understood is the manner in which environmental cues are incorporated during development to influence the ...
openaire   +2 more sources

Contrasted habitat selection among Eurasian curlew populations according to landscape heterogeneity and breeding stage

The Journal of Wildlife Management, EarlyView.
This study aimed to quantify the spatio‐temporal use of breeding environments by the Eurasian curlew in 5 contrasting agricultural landscapes. To this end, 64 individuals were tagged with GPS devices to assess their space use according to their breeding stages and define their foraging habitat selection.
Marie Donnez, Emmanuel Joyeux, Frédéric Jiguet, Jean‐Noël Ballot, Jeanne Bienvenut, Alain Chartier, Etienne Debenest, Charlotte Francesiaz, Aurélien Lacondemine, Christophe Lartigau, Yves‐Marie Le Guen, Jacques Maout, Charline Pierrefeu, David Pinaud, Nicolas Terrel, Pierrick Bocher   +15 more
wiley   +1 more source

Seasonal polyphenism in Eristalis pertinax (Diptera: Syrphidae)

European Journal of Entomology, 2016
Eristalis pertinax varies seasonally, with the spring morph more hairy than the summer morph. We measured the size and the venation of the wings of the seasonal morphs.
Lukasz E. MIELCZAREK, Andrzej OLEKSA, Katarzyna MEYZA, Adam TOFILSKI   +3 more
doaj   +1 more source

Arisaema siahaense sp. nov. (Araceae) from India

Nordic Journal of Botany, EarlyView.
A new species of Arisaema Mart. (Araceae) belonging to sect. Fimbriata is described and illustrated here from the Siaha District, Mizoram, India. This new species is characterized by an evergreen, dioecious herbaceous habit, up to 1.08 m high, having a subglobose tuber, with a solitary trifoliate leaf.
Rabishankar Sengupta, Sudhansu Sekhar Dash   +1 more
wiley   +1 more source