Results 41 to 50 of about 210,432 (378)

Fasciola gigantica, F. hepatica and Fasciola intermediate forms: geometric morphometrics and an artificial neural network to help morphological identification

open access: yesPeerJ, 2020
Background Fasciola hepatica and F. gigantica cause fascioliasis in both humans and livestock. Some adult specimens of Fasciola sp. referred to as “intermediate forms” based on their genetic traits, are also frequently reported.
S. Sumruayphol   +5 more
semanticscholar   +1 more source

Egg shape changes at the theropod–bird transition, and a morphometric study of amniote eggs [PDF]

open access: yes, 2014
The eggs of amniotes exhibit a remarkable variety of shapes, from spherical to elongate and from symmetrical to asymmetrical. We examine eggshell geometry in a diverse sample of fossil and living amniotes using geometric morphometrics and linear ...
Abramoff MD   +14 more
core   +1 more source

The Cinderella discipline: morphometrics and their use in botanical classification

open access: yesBotanical journal of the Linnean Society, 2020
Between the 1960s and the present day, the use of morphology in plant taxonomy suffered a major decline, in part driven by the apparent superiority of DNA-based approaches to data generation.
Marika Christodoulou   +2 more
semanticscholar   +1 more source

The Shape Diversity of Olive Stones Resulting from Domestication and Diversification Unveils Traits of the Oldest Known 6500-Years-Old Table Olives from Hishuley Carmel Site (Israel)

open access: yesAgronomy, 2021
The first exploited and domesticated olive forms are still unknown. The exceptionally well-preserved stones from the submerged Hishuley Carmel site (Israel), dating from the middle of the 7th millennium BP, offer us the opportunity to study the oldest ...
Jean-Frédéric Terral   +13 more
doaj   +1 more source

Estudo da variabilidade entomopatogênicos nematóides populações (Heterorhabditidae) da Argentin [PDF]

open access: yes, 2016
Entomopathogenic nematodes (EPN) belonging to the Heterorhabditidae family are lethal parasites of soil-dwelling insects. Two species were reported in Argentina: Heterorhabditis argentinensis and Heterorhabditis bacteriophora characterized mainly by ...
Achinelly, Maria Fernanda   +3 more
core   +2 more sources

Pathologies of Between-Groups Principal Components Analysis in Geometric Morphometrics

open access: yesEvolutionary biology, 2019
Good empirical applications of geometric morphometrics (GMM) typically involve several times more variables than specimens, a situation the statistician refers to as “high p/n,” where p is the count of variables and n the count of specimens.
F. Bookstein
semanticscholar   +1 more source

Morphological variability of Bembidion varium (Coleoptera, Carabidae) in gradient of soil salinity

open access: yesFolia Oecologica, 2020
This article discusses the effect of soil salinity on the variability of Bembidion (Notaphus) varium (Oliver, 1795). The authors of the article collected imagoes of this species in five ecosystems that differed in soil salinity; 13 linear characteristics,
Komlyk Viktoriia, Brygadyrenko Viktor
doaj   +1 more source

Head morphology in three species of tiger beetles (Coleoptera: cicindelidae): a geometric morphometric study

open access: yesThe European Zoological Journal
Tiger beetles are one of the world’s most studied groups of insects. They are similar in body shape and proportions and have a well-sclerotized head with large protruding eyes that make it wider than the pronotum.
Y. Koçak   +5 more
doaj   +1 more source

Kinosternon integrum [PDF]

open access: yes, 1998
Number of Pages: 6Integrative BiologyGeological ...
Berry, James. F.   +2 more
core   +1 more source

Morphological disparity in theropod jaws: comparing discrete characters and geometric morphometrics

open access: yesPalaeontology, 2020
Disparity, the diversity of form and function of organisms, can be assessed from cladistic or phenetic characters, and from discrete characters or continuous characters such as landmarks, outlines, or ratios.
Joep Schaeffer   +3 more
semanticscholar   +1 more source

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