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Keywords: Snake
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Journal Articles
J Exp Biol (2021) 224 (17): jeb242202.
Published: 13 September 2021
...Tobias Wang; Augusto S. Abe; Ariovaldo P. Cruz-Neto; Denis V. Andrade; Edwin W. Taylor ABSTRACT When snakes digest large meals, heart rate is accelerated by withdrawal of vagal tone and an increased non-adrenergic-non-cholinergic tone that seems to stem from circulating blood-borne factors exerting...
Journal Articles
J Exp Biol (2020) 223 (2): jeb203885.
Published: 21 January 2020
... concurrently measured. To examine CORT's role in mobilizing glucose in a wild reptile, we conducted two studies. The first study measured natural baseline and stress-induced blood-borne CORT and glucose levels in snakes during spring emergence and again when snakes return to the denning sites in autumn...
Journal Articles
J Exp Biol (2018) 221 (7): jeb173377.
Published: 06 April 2018
.... In this study, male ball pythons ( Python regius ) were used to test the hypothesis that food consumption stimulates cell proliferation in the brain. We used 5-bromo-12′-deoxyuridine (BrdU) as a cell-birth marker to quantify and compare cell proliferation in the brain of fasted snakes and those at 2 and 6 days...
Journal Articles
J Exp Biol (2018) 221 (4): jeb166199.
Published: 22 February 2018
...Steven J. Newman; Bruce C. Jayne ABSTRACT A central issue for understanding locomotion of vertebrates is how muscle activity and movements of their segmented axial structures are coordinated, and snakes have a longitudinal uniformity of body segments and diverse locomotor behaviors that are well...
Includes: Supplementary data
Journal Articles
J Exp Biol (2015) 218 (3): 440–450.
Published: 01 February 2015
... to enhance subsurface performance. Using X-ray imaging, we performed the first kinematic investigation of the subsurface locomotion of the long, slender shovel-nosed snake ( Chionactis occipitalis ) and compared its biomechanics with those of the shorter, limbed sandfish lizard ( Scincus scincus...
Includes: Supplementary data
Journal Articles
J Exp Biol (2014) 217 (3): 472–478.
Published: 01 February 2014
... examined whether juveniles have better feeding performance relative to adults and investigations of snake feeding ontogeny have not shown enhanced performance in smaller snakes. I tested the hypothesis that juvenile snakes have better feeding performance by comparing maximum gape circumference...
Journal Articles
J Exp Biol (2013) 216 (22): 4190–4195.
Published: 15 November 2013
...Kevin van Doorn; Jacob G. Sivak SUMMARY The eyes of snakes are shielded beneath a layer of transparent integument referred to as the ‘reptilian spectacle’. Well adapted to vision by virtue of its optical transparency, it nevertheless retains one characteristic of the integument that would otherwise...
Includes: Supplementary data
Journal Articles
J Exp Biol (2013) 216 (5): 815–822.
Published: 01 March 2013
... documented. We manipulated shelter availability and environmental and physiological variables (i.e. access to a heat source, predator attack, feeding status) in a viviparous snake, and assessed sun-basking behavior, digestive performance (i.e. digestive transit time, crude estimate of assimilation...
Includes: Supplementary data
Journal Articles
J Exp Biol (2012) 215 (15): 2621–2629.
Published: 01 August 2012
... ) for source coordinate y and image coordinate x R equivalent conductance due to thermal radiation, R =4σ m T b 3 (W m –2 K –1 ) T b snake body (pit wall) temperature (°C or K) T ( x ) temperature of the facial pit membrane at coordinate x (°C or K) T xr reference...
Includes: Multimedia, Supplementary data
Journal Articles
J Exp Biol (2012) 215 (5): 723–730.
Published: 01 March 2012
... study species, the red-sided garter snake ( Thamnophis sirtalis parietalis ), is a model vertebrate for studying hormonal control of chemical signals because males completely rely on the female sex pheromone to identify potential mates among thousands of individuals. How sex hormones can influence...
Journal Articles
J Exp Biol (2012) 215 (1): 185–196.
Published: 01 January 2012
...Stephen M. Secor; Josi R. Taylor; Martin Grosell SUMMARY Snakes exhibit an apparent dichotomy in the regulation of gastrointestinal (GI) performance with feeding and fasting; frequently feeding species modestly regulate intestinal function whereas infrequently feeding species rapidly upregulate...
Journal Articles
J Exp Biol (2011) 214 (9): 1458–1462.
Published: 01 May 2011
...Joshua J. Amiel; Beverly Chua; Richard J. Wassersug; David R. Jones SUMMARY Regional control of blood flow is often suggested as a mechanism for fine thermoregulatory adjustments in snakes. However, the flow of blood to different body regions at various temperatures has never been visualized...
Journal Articles
J Exp Biol (2010) 213 (11): 1797–1802.
Published: 01 June 2010
.... Several factors make this level of accuracy difficult to achieve; the target is moving, is frequently >1 m away from the snake and the venom stream is released in approximately 50 ms. In the present study we show that spitting cobras can accurately track the movements of a potentially threatening...
Journal Articles
J Exp Biol (2010) 213 (10): 1691–1696.
Published: 15 May 2010
... nest attendance in animals. * Author for correspondence ( zs@asu.edu ) 31 1 2010 © 2010. 2010 adaptive plasticity life history trade-offs metabolism parental care snake thermoregulation water balance Parental care is instrumental to the success of a diverse array...
Journal Articles
J Exp Biol (2010) 213 (9): 1521–1528.
Published: 01 May 2010
...Bruce A. Young; Kenneth V. Kardong SUMMARY Many snakes, particularly cobras, form as part of a defensive display, a hood, an active lateral expansion of their neck skin and underlying musculature and ribs. We identified muscle groups possibly involved in hooding based on their attachments...
Journal Articles
J Exp Biol (2010) 213 (5): 735–739.
Published: 01 March 2010
... to the next. Although this idea is central to interpreting the fitness consequences of adaptive plasticity, empirical data on costs of plasticity are scarce. In Australian tiger snakes, larger relative head size enhances maximal ingestible prey size on islands containing large prey. The trait arises via...
Journal Articles
J Exp Biol (2010) 213 (2): 242–248.
Published: 15 January 2010
... their body temperatures? To explore this question, we raised 43 captive-born tiger snakes Notechis scutatus in enclosures that provided cold (19–22°C), intermediate (19–26°C) or hot (19–37°C) thermal gradients. The snakes adjusted their diel timing of thermoregulatory behaviour so effectively that when...
Journal Articles
J Exp Biol (2010) 213 (1): 78–88.
Published: 01 January 2010
... snakes are digesting and moving, we examined changes in cardiac performance and blood flow in response to digestion, movement, and the combination of digestion and movement. We used perivascular blood flow probes to measure blood flow through the left carotid artery, dorsal aorta, superior mesenteric...
Journal Articles
J Exp Biol (2009) 212 (12): 1921–1929.
Published: 15 June 2009
... ( R s ) of sea snakes that are transitional in the sense of being amphibious and semi-terrestrial. We investigated three species of sea kraits (Elapidae: Laticaudinae) that are common to Orchid Island (Lanyu),Taiwan. Generally, R s of all three species is lower than that characteristic of terrestrial...
Journal Articles
J Exp Biol (2009) 212 (10): 1535–1543.
Published: 15 May 2009
...Milene S. A. Luna; Thiago M. A. Hortencio; Zulma S. Ferreira; Norma Yamanouye SUMMARY The venom gland of viperid snakes has a central lumen where the venom produced by secretory cells is stored. When the venom is lost from the gland,the secretory cells are activated and new venom is produced...