Results 21 to 30 of about 5,765 (217)

3D pollination biology using micro‐computed tomography and geometric morphometrics in Theobroma cacao

Applications in Plant Sciences, Volume 11, Issue 5, September-October 2023., 2023
Abstract Premise Imaging technologies that capture three‐dimensional (3D) variation in floral morphology at micro‐ and nano‐resolutions are increasingly accessible. In herkogamous flowers, such as those of Theobroma cacao, structural barriers between anthers and stigmas represent bottlenecks that restrict pollinator size and access to reproductive ...
Katherine A. Wolcott, Edward L. Stanley, Osman A. Gutierrez, Stefan Wuchty, Barbara Ann Whitlock   +4 more
wiley   +1 more source

Trilobites of Thailand's Cambrian–Ordovician Tarutao Group and their geological setting

Papers in Palaeontology, Volume 9, Issue 5, September/October 2023., 2023
Abstract Tuff‐bearing upper Cambrian to lowermost Ordovician strata on Ko Tarutao island, Satun province, southernmost peninsular Thailand, contain a rich trilobite fauna relevant to global biostratigraphy, peri‐Gondwanan palaeogeography and shifting evolutionary mode.
Shelly J. Wernette, Nigel C. Hughes, Paul M. Myrow, Apsorn Sardsud   +3 more
wiley   +1 more source

Skeletal age during hurricane impacts fluctuating asymmetry in Cayo Santiago rhesus macaques

Ecology and Evolution, Volume 13, Issue 8, August 2023., 2023
Fluctuating asymmetry (FA), or random deviations from symmetry, can be used as a proxy for developmental instability, and anthropogenic and natural disruptions have been associated with increased levels of FA. In this study, we investigate the effect of demographic variables (age, sex, and decade of birth) and hurricane experience on FA in a model ...
Ashly N. Romero, Edwin Dickinson, Cassandra M. Turcotte, Claire E. Terhune   +3 more
wiley   +1 more source

Constructing a multiple‐part morphospace using a multiblock method

Methods in Ecology and Evolution, Volume 14, Issue 1, Page 65-76, January 2023., 2023
Abstract Popular current methods for quantifying variation in biological shape are well‐suited to analyses of isolated parts (e.g. the same bone from the skeletons of many individuals). An analytical challenge exists for quantifying variation between the shapes of multiple‐part objects where each part has a different position, rotation or scale (e.g ...
Daniel B. Thomas, Aaron M. T. Harmer, Simone Giovanardi, Emma J. Holvast, Cushla M. McGoverin, Arthur Tenenhaus   +5 more
wiley   +1 more source

Cranial ecomorphology of turtles and neck retraction as a possible trigger of ecological diversification

Evolution, Volume 76, Issue 11, Page 2566-2586, November 2022., 2022
Abstract Turtles have a highly modified body plan, including a rigid shell that constrains postcranial anatomy. Skull morphology and neck mobility may therefore be key to ecological specialization in turtles. However, the ecological signal of turtle skull morphologies has not been rigorously evaluated, leaving uncertainties about the roles of ...
Guilherme Hermanson, Roger B. J. Benson, Bruna M. Farina, Gabriel S. Ferreira, Max C. Langer, Serjoscha W. Evers   +5 more
wiley   +1 more source

Web databases of feather photographs are useful tools for avian morphometry studies

Ecology and Evolution, Volume 11, Issue 12, Page 7677-7684, June 2021., 2021
Wing area and aspect ratio are key variables for studies of avian comparative ecology, despite the complexity of measuring them both in living and in museum specimens. The systematic databases of feather photographs available on the Internet may offer an alternative way of obtaining such morphometric data.
Juan E. Malo, Cristina Mata
wiley   +1 more source

Morfometria da cicatrização do cólon descendente de eqüinos submetidos a enterorrafias aposicional e invaginante [PDF]

Ciência Rural, 2006
A pesquisa foi conduzida com o objetivo de comparar duas técnicas de enterorrafias no cólon descendente de eqüinos, uma aposicional e outra invaginante, utilizando-se de avaliações morfométricas.
Flávia de Almeida Lucas, José Wanderley Cattelan, Silvana Martinez Baraldi Artoni, Euclides Braga Malheiros, Daniela Oliveira   +4 more
doaj   +1 more source

Morfometria multivariata e variazione geografica [PDF]

Biogeographia – The Journal of Integrative Biogeography, 1987
BIOGEOGHAPHIA - vol. XI — 1985 Pn'ncipi e metodi deII'anaIisi biogeografica Morfometria multivariata e variazione geografica MARCO CORTI E ANNA LOY Dipartz'ment0 dz’ Biologia Ammale e delZ’U0mo, Um'vem'td di Roma, «La Sapienza» SUMMARY Local populations have a unity wich is mantained by the interbreeding of the individuals of which ...
CORTI M., LOY, Anna
openaire   +4 more sources

Obese fathers lead to an altered metabolism and obesity in their children in adulthood: review of experimental and human studies

Jornal de Pediatria, 2017
Objective: To discuss the recent literature on paternal obesity, focusing on the possible mechanisms of transmission of the phenotypes from the father to the children.
Fernanda Ornellas, Priscila V. Carapeto, Carlos A. Mandarim-de-Lacerda, Marcia B. Aguila   +3 more
doaj   +1 more source

Neuroimagem do TDAH: achados de ressonância magnética estrutural e funcional

Debates em Psiquiatria, 2014
Essa revisão descreve primeiramente o funcionamento das metodologias de ressonância magnética: morfometria baseada em voxels, morfometria baseada em superfície, imagem por tensor de difusão, ressonância magnética funcional com aplicação de tarefas ...
Felipe Almeida Picon
doaj   +1 more source