Anatomical description of the jaw muscles and theoretical bite force assessment in South American opossums using manual and digital dissection methods. [PDF]
J AnatManual and virtual dissections were employed to examine the masticatory muscle architecture and bite force of three South American marsupials. The organisation of the muscles differed between species, with predicted bite forces exceeding previous estimates.
Melekian A +4 more
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Second-order elasticities for ecology and evolution: Unraveling nonlinear fitness responses to perturbations. [PDF]
EcologyAbstract In ecology and evolutionary biology, understanding the relationship between vital rates (e.g., survival, development, reproduction) and population growth is essential to elucidate how life history strategies are shaped by natural selection. Yet most established demographic methods rely on linear assumptions that rank the importance of vital ...
Kajin M +5 more
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From transporter to motor: Evolutionary and structural insights into the emergence of prestin's area-motor activity in mammals. [PDF]
Protein SciAbstract Prestin, a member of the SLC26A family, is essential for the electromotility of mammalian outer hair cells, converting voltage changes into mechanical work. In contrast, nonmammalian orthologues function as anion transporters. To investigate the molecular and structural basis of this functional divergence, we performed ancestral sequence ...
Fuentes-Ugarte N +6 more
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Modelling marsupial mastication: The biomechanical bite model of the Linnaeus's mouse opossum Marmosa murina (Marsupialia, Didelphidae). [PDF]
J AnatThe marsupial masticatory apparatus has rarely been studied until recently, mainly in Australasian species. We therefore reconstructed the maximum bite forces of the South American Linnaeus's mouse opossum Marmosa murina using in vivo bites, specimen dissections, and 3D static equilibrium of the jaw muscles.
Decuypere V +5 more
europepmc +2 more sources
Head and Whisker Behaviours Observed During Foraging in Northern Elephant Seals (<i>Mirounga angustirostris</i>). [PDF]
Ecol EvolWe observed a range of behaviours during foraging, including forward swimming, vertical diving, swooping, dabbing, sweeping and rotations. Head dabbing was also sometimes accompanied by the seal producing infrasounds, the bouts of which coincided with rhythmic whisker protractions. ABSTRACT Pinnipeds use their whiskers to detect and follow hydrodynamic
Chapman M +3 more
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Los marsupiales del yacimiento del Eoceno Superior de Zambrana (Álava, Región Vasco-Cantábrica)
Estudios Geologicos, 2006 En este trabajo se dan a conocer los fósiles de marsupiales del yacimiento del Eoceno Superior de Zambrana (Álava, Cuenca de Miranda-Treviño). Las dos hemimandíbulas descritas son atribuibles a la subfamilia Herpetotheriinae («Didelphidae») y se asignan ...
A. Badiola, M. A. Cuesta
doaj +1 more source
Humans are not unique: difficult birth is common in placental mammals. [PDF]
Biol Rev Camb Philos SocABSTRACT Human childbirth is widely presumed to be uniquely difficult and dangerous compared to birth in other mammals. Tight fetopelvic proportions can result in obstructed labour and contribute to high rates of maternal and neonatal mortality. Ideas summarised under the ‘obstetrical dilemma’ have contributed to this assumption by explaining difficult
Grunstra NDS.
europepmc +2 more sources
On the Gastric Glands of the Marsupialia. [PDF]
Journal of the Linnean Society of London, Zoology, 1899 (Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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The Ancestry of the Marsupialia [PDF]
Nature, 1909 IN the notice (NATURE, December 24, 1908) of Prof. A. A. W. Hubrecht's paper on the early ontogeny of the Mammalia, the writer states that the view adopted by Prof. Hubrecht, according to which the Metatheria are the descendants of placental ancestors, is in direct opposition to my own.
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Jurnal Kedokteran Hewan, 2016 The morphological characteristics of the stomach and esophagus of five adults bandicoot (Echymipera kalubu) with average 1.16±0.29 kg in body weight and 38.2±4.76 cm in body length were studied macroscopically, microscopically and histochemically.
Ursula Paulawati Maker +2 more
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