Results 1 to 10 of about 1,144,491 (344)

Chagas vectors Panstrongylus chinai (Del Ponte, 1929) and Panstrongylus howardi (Neiva, 1911): chromatic forms or true species?

Parasites & Vectors, 2020
Background Chagas disease is a parasitic infection transmitted by “kissing bugs” (Hemiptera: Reduviidae: Triatominae) that has a huge economic impact in Latin American countries.
Anita G. Villacís, Jean-Pierre Dujardin, Francisco Panzera, César A. Yumiseva, Sebastián Pita, Soledad Santillán-Guayasamín, Marco I. Orozco, Katherine D. Mosquera, Mario J. Grijalva   +8 more
doaj   +1 more source

Geometric morphometrics for the study of facial expressions in non-human animals, using the domestic cat as an exemplar

Scientific Reports, 2019
Facial expression is a common channel for the communication of emotion. However, in the case of non-human animals, the analytical methods used to quantify facial expressions can be subjective, relying heavily on extrapolation from human-based systems ...
Lauren R. Finka, S. P. Luna, J. Brondani, Yorgos Tzimiropoulos, J. McDonagh, M. Farnworth, M. Ruta, D. Mills   +7 more
semanticscholar   +1 more source

Combining machine learning algorithms and geometric morphometrics: A study of carnivore tooth marks

Palaeogeography, Palaeoclimatology, Palaeoecology, 2019
Since the 1980s an intense scientific debate has revolved around the hunting capacities of early hominin populations and the behavioral patterns of carnivores sharing the same ecosystem, and thus competing for the same resources.
L. Courtenay, J. Yravedra, R. Huguet, Julia Aramendi, M. Maté‐González, D. González-Aguilera, M. Arriaza   +6 more
semanticscholar   +1 more source

Defining an intrasexual male weapon polymorphism in a New Zealand harvestman (Opiliones: Neopilionidae) using traditional and geometric morphometrics

, 2020
In many species, competition for mates has led to exaggerated male sexually-selected traits. Sexually-selected male weapons are used in male-male combat and include structures like horns, antlers and enlarged teeth. Weapons often vary intraspecifically
E. Powell, C. J. Painting, A. Hickey, G. Holwell   +3 more
semanticscholar   +1 more source

Drivers of molecular and morphometric variation in Triatoma brasiliensis (Hemiptera: Triatominae): the resolution of geometric morphometrics for populational structuring on a microgeographical scale

Parasites & Vectors, 2020
The protozoan Trypanosoma cruzi circulates in semiarid areas of northeastern Brazil in distinct ecotopes (sylvatic, peridomestic and domestic) where Triatoma brasiliensis Neiva, 1911 is the most important Chagas disease vector. In this study, we analyzed
Edgard Kamimura, M. C. Viana, Maurício Lilioso, F. Fontes, Dayane Pires-Silva, Carolina Valença-Barbosa, A. L. Carbajal-de-la-Fuente, E. Folly-Ramos, Vera N Solferin, P. Thyssen, J. Costa, C. E. Almeida   +11 more
semanticscholar   +1 more source

Apples before the fall: Does shape stability coincide with maturity?

Quantitative Plant Biology, 2021
Fruit shape is the result of the interaction between genetic, epigenetic, environmental factors and stochastic processes. As a core biological descriptor both for taxonomy and horticulture, the point at which shape stability is reached becomes paramount ...
Maria D. Christodoulou, Alastair Culham
doaj   +1 more source

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

Palaeontology, 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, M. Benton, E. Rayfield, Thomas L. Stubbs   +3 more
semanticscholar   +1 more source

Morphometric variation of the Herichthys bartoni (Bean, 1892) species group (Teleostei: Cichlidae): How many species comprise H. labridens (Pellegrin, 1903)?

Neotropical Ichthyology
Cichlids of the tribe Heroini have long been a source of taxonomical conflict. In particular, the species included in the Herichthys bartoni group have failed to be recovered as monophyletic in different molecular studies.
Omar Mejía, Fabián Pérez-Miranda, Yatzil León-Romero, Eduardo Soto-Galera, Efraín de Luna   +4 more
doaj   +1 more source

Discrimination of cryptic species: Tabanus triangulum and Tabanus occidentalis (Diptera: Tabanidae) differ in size and shape [PDF]

Revista Brasileira de Parasitologia Veterinária
Horse fly females (Diptera, Tabanidae) are hematophagous and can vector pathogens that affect livestock. Complexes of cryptic species are common in Tabanidae, as exemplified by some species of Tabanus, including Tabanus triangulum and Tabanus ...
Gratchela Dutra Rodrigues, Boaventura Lobo Centeno Filho, Diuliani Fonseca Morales, Rafaela de Freitas Rodrigues Mengue Dimer, Caroline da Silva Cavalheiro, Tiago Kütter Krolow, Mauricio Osvaldo Moura, Rodrigo Ferreira Krüger   +7 more
doaj   +1 more source

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

PeerJ, 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, P. Siribat, J. Dujardin, Sébastien Dujardin, C. Komalamisra, U. Thaenkham   +5 more
semanticscholar   +1 more source