Article
Ecology
Mathias Hune, Alex Quintullanca, Cristian Aldea, Mauricio F. Landaeta
Summary: This study provides the first description of the morphology, condition, and diet of the rockcod Patagonotothen tessellata from Chilean Central Patagonia. Sexual shape dimorphism was found in snout extension, mouth size, and pelvic fin insertion. Male rockcod showed preferences for Patagonotothen spp., unidentified crustaceans, and polychaetes, while females primarily consumed unidentified fish and crustaceans. Significant differences in diet composition were observed between sexes, but not among size groups. There was a weak but significant relationship between diet and morphology.
ENVIRONMENTAL BIOLOGY OF FISHES
(2023)
Article
Biology
Talia M. Lowi-Merri, Roger B. J. Benson, Santiago Claramunt, David C. Evans
Summary: The study reveals the correlation between the size and shape of avian sternum and locomotory capabilities, including flight, swimming, and running abilities. It highlights the importance of sternum form and function in modern birds, providing insights into the evolution of powered avian flight.
Article
Multidisciplinary Sciences
Mathieu Boisville, Narimane Chatar, Olivier Lambert, Leonard Dewaele
Summary: The present study combines qualitative comparison and quantitative analysis of walrus mandibles to identify sexual dimorphism and demonstrate its statistical significance. The results show new morphological differences between males and females and suggest that mandibular morphology can be used to determine the sex of isolated mandibles. This study provides a starting point for further research on sexual dimorphism and inter- and intraspecific variation in fossil walrus mandibles.
Article
Chemistry, Multidisciplinary
Dario Herranz-Rodrigo, Silvia J. Tardaguila-Giacomozzi, Lloyd A. Courtenay, Juan-Jose Rodriguez-Alba, Antonio Garrucho, Jesus Recuero, Jose Yravedra
Summary: This study examines the tooth marks left by tigers and leopards on bones, finding that sexual dimorphism does not influence the morphology of tooth marks in these felid species.
APPLIED SCIENCES-BASEL
(2021)
Article
Biology
Jacqueline K. Lungmus, Kenneth D. Angielczyk
Summary: The study compared the forelimb shapes of fossil synapsid radiations with a broad sample of extant mammals, revealing that each synapsid radiation explored different areas of morphospace and arrived at functional solutions reflecting their distinctive ancestral morphologies. This work challenges the narrative of non-mammalian synapsid forelimb evolution as a linear progression towards more mammal-like forms, instead showing a diverse array of early-evolving shapes subsequently converging towards more mammal-like forms.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2021)
Article
Fisheries
Jordan Hernandez, Amado Villalobos-Leiva, Adriana Bermudez, Daniela Ahumada-Cabarcas, Manuel J. Suazo, Hugo A. Benitez
Summary: C. kraussii is an endemic fish species from Colombia and Venezuela, and it is a valuable food resource for local communities. The management and captive breeding of this species face difficulties due to the anatomical similarities between sexes and the cryptic morphological behavior. A study on individuals from different localities revealed sexual dimorphism within locations, with males exhibiting less morphological variability and females exhibiting greater morphological disparity. This dimorphism may be influenced by environmental variation.
Article
Biology
Romain Pintore, Raphael Cornette, Alexandra Houssaye, Ronan Allain
Summary: This study uses 3D geometric morphometrics and Gaussian mixture modeling to investigate hindlimb variation in the best-preserved specimens from a herd of ornithomimosaurs. The results reveal evidence of sexual dimorphism, which is important for a better understanding of intraspecific variation in fossil dinosaurs and addressing taxonomical and ecological questions related to dinosaur evolution.
Article
Marine & Freshwater Biology
Michaela Kerschbaumer, Lisbeth Postl, Christian Sturmbauer
Summary: This study compared the shape of viscerocranial bones among different Tropheus populations and found significant morphological differences between sympatric and non-sympatric populations, as well as extensive variation within and among species. Sexual dimorphism was also evident in the viscerocranial bones analyzed. The study suggests that differences in ecologically relevant traits, such as bones of the preorbital region, play an important role in the process of niche separation and cichlid fishes diversification.
Article
Entomology
Sanja Budecevic, Uros Savkovic, Mirko Dordevic, Lea Vlajnic, Biljana Stojkovic
Summary: This study on the seed beetle Acanthoscelides obtectus found that females were larger than males and had different modular organization, indicating that reproductive function plays a central role in forming patterns of modularity.
Article
Biology
Talia M. Lowi-Merri, Oliver E. Demuth, Juan Benito, Daniel J. Field, Roger B. J. Benson, Santiago Claramunt, David C. Evans
Summary: Avian skeletal morphology can provide insights into locomotor function in both extant and extinct taxa. In this study, the researchers examined the sternal shape and skeletal proportions of the fossil taxon Ichthyornis to infer its locomotor capabilities. Their analysis suggests that Ichthyornis had both soaring and foot-propelled swimming capabilities. Furthermore, they found that sternal shape and skeletal proportions provide complementary information on avian locomotion, with skeletal proportions predicting flight capacity and sternal shape predicting more specific locomotor abilities. These findings have important implications for understanding the ecology of extinct birds and highlight the significance of sternum morphology in investigations of fossil bird locomotion.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Agriculture, Dairy & Animal Science
Jordan Hernandez, Amado Villalobos-Leiva, Adriana Bermudez, Daniela Ahumada-C, Manuel J. Suazo, Margarita Correa, Angie Diaz, Hugo A. Benitez
Summary: This study analyzes the morphological variability of Caquetaia kraussii and finds that environmental stress influences about 10% of its body shape, while the majority of the variability is not directly influenced by environmental parameters, suggesting a possible effect from sexual dimorphism. Additionally, there is shape variation among populations of different localities, which may be subject to environmental and sexual stresses.
Article
Ecology
Iris Menendez, Donald L. Swiderski, Ana R. Gomez Cano, Manuel Hernandez Fernandez, Maria A. Alvarez-Sierra, Miriam L. Zelditch
Summary: Understanding the drivers of tooth morphology evolution is crucial for grasping the origin and development of diversity. Through a study on squirrels, it is revealed that diet plays a significant role in shaping tooth morphology, with mechanical processing requirements being a driving force for morphological change. Additionally, diet composition also influences the extent of morphological adaptation.
Article
Zoology
Maria Noel C. Hirschfeld, Artur Campos D. Maia, Luiz R. R. Faria
Summary: Environmental changes alter selective pressures on species, leading to morphological variation which can enhance species' adaptation and interactions. Research on Eulaema nigrita bees in Brazil found significant variation in morphological attributes among populations, with temperature seasonality being the key factor.
ZOOLOGISCHER ANZEIGER
(2021)
Article
Zoology
Marina Meireles dos Santos, Julia Klaczko, Ana Lucia da Costa Prudente
Summary: This study analyzes sexual dimorphism in skull and body size and shape in three malacophagous dipsadine snakes, finding that the skull size and shape differ between males and females. Females have longer and thinner skulls. Additionally, females are larger overall. There is covariation between skull shape and body size and an allometric relationship between body and tail size in males.
Article
Agriculture, Dairy & Animal Science
Darija Lemic, Helena Viric Gasparic, Patricija Majcenic, Ivana Pajac Zivkovic, Mario Bjelis, Manuel J. Suazo, Margarita Correa, Jordan Hernandez, Hugo A. Benitez
Summary: This study aimed to investigate the morphological variability of the box tree moth from Croatia and assess its invasive characteristics, flight potential, and risk of further spread. The results revealed significant differences in wing shapes between populations from different geographical locations, as well as subtle wing shape sexual dimorphism.
Article
Biodiversity Conservation
Francisco Diogo R. Sousa, Lourdes M. A. Elmoor-Loureiro, Sandro Santos
JOURNAL OF NATURAL HISTORY
(2018)
Article
Multidisciplinary Sciences
Samuel Coelho Faria, Roberta Daniele Klein, Patricia Gomes Costa, Marcelo Schuler Crivellaro, Sandro Santos, Sergio Luiz de Siqueira Bueno, Adalto Bianchini
SCIENTIFIC REPORTS
(2018)
Article
Environmental Sciences
Alberto S. Goncalves, Gabriel C. Costa, Georgina Bond-Buckup, Marlise L. Bartholomei-Santos, Sandro Santos
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2018)
Article
Limnology
Glaucia Bolzan Cogo, Cristiane Biasi, Sandro Santos
FUNDAMENTAL AND APPLIED LIMNOLOGY
(2018)
Article
Evolutionary Biology
L. T. Leipnitz, R. Fornel, L. E. J. Ribas, B. B. Kubiak, D. Galiano, T. R. O. de Freitas
JOURNAL OF MAMMALIAN EVOLUTION
(2020)
Article
Zoology
Bianca Lais Zimmermann, Ivanklin Soares Campos-Filho, Giovanna Monticelli Cardoso, Sandro Santos, Jose Otavio Aguiar, Paula Beatriz Araujo
Article
Zoology
Cristiane Biasi, Glaucia B. Cogo, Luiz U. Hepp, Sandro Santos
IHERINGIA SERIE ZOOLOGIA
(2019)
Article
Anatomy & Morphology
Alexandre Palaoro, Danilo G. Muniz, Sandro Santos
JOURNAL OF MORPHOLOGY
(2020)
Article
Environmental Sciences
Cristina Cerezer, Aline Teixeira Marins, Felipe Osmari Cerezer, Eduardo Stringini Severo, Jossiele Wesz Leitemperger, Nelson Miguel Grubel Bandeira, Renato Zanella, Vania Lucia Loro, Sandro Santos
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2020)
Article
Evolutionary Biology
Bianca L. Zimmermann, Ivanice Buzatto, Sandro Santos, Federico Giri, Franco Teixeira de Mello, Keith A. Crandall, Marcos Perez-Losada, Marlise L. Bartholomei-Santos
Summary: Cryptic species pose a challenge for morphologically based species identification, but molecular approaches can provide valuable taxonomic hypotheses. Research on South American freshwater crabs of the genus Aegla suggests that morphological similarity does not always indicate genetic relatedness, and there may be cryptic species present. The diversity of these crustaceans seems to be influenced by factors such as habitat fragmentation, morphological stasis, and recent divergence.
Article
Zoology
Mrcio Limberger, Sandro Santos, Daniela Da Silva Castiglioni
Summary: This study describes a new species of freshwater amphipod in the Varzea River basin in southern Brazil, and compares it with previously discovered species. The diversity of freshwater amphipods in this region is intriguing, and further research can help uncover the evolutionary history and patterns of diversification of the genus Hyalella.
Article
Fisheries
Alessandra Janaina Becker, Sandro Santos, Berta Maria Heinzmann, Braulio Otomar Caron, Bernardo Baldisserotto
Summary: This study evaluated the induction and recovery time of anesthesia in the amphipod crustacean H. bonariensis exposed to essential oils. The results showed that the essential oils and their major compounds affected the anesthesia and locomotor activity of the amphipods.
Article
Zoology
Glaucia Brisotto, Luciane Ayres-Peres, Sandro Santos
Summary: This study describes the population structure of Tallitroides topitotum in terms of morphometric and reproductive aspects. The research findings show a significant correlation between body and head lengths, as well as body and marsupium lengths in ovigerous females. However, there is no correlation between morphometric data and female fertility. Additionally, there is a positive correlation between the size of individuals and the latitude of occurrence, although not significant.
IHERINGIA SERIE ZOOLOGIA
(2022)
Article
Multidisciplinary Sciences
Raissa Prior Migliorini, Rodrigo Fornel, Carlos Benhur Kasper
Article
Zoology
Fernando Benso-Lopes, Sandro Santos, Alexandre V. Palaoro
JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL AND INTEGRATIVE PHYSIOLOGY
(2019)