Relation of the rate of hyoid movement to body weight and temperature in diving soft-shell turtles

Dunson, William A.

doi:10.1016/0010-406x(66)90042-9

Cited by 5 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the entire oral cavity in T. adiutrix is well vascularized, a morphological turtle characteristic that allows for oxygen extraction from water through the oropharyngeal mucosa (Dunson, 1966). The combination of all these structures present in the epithelium and the lamina propria act in secretion, immunological responses, metabolism, and sensory and mechanical properties, promoting successful environmental adaptations (Heiss et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

Morphological tongue and palate characterizations in Trachemys adiutrix (Vanzolini, 1995) turtles

Ferraz

Corrêa

Calvet

et al. 2023

Anat Histol Embryol

View full text Add to dashboard Cite

Morphological studies on the oropharyngeal cavity of turtles are an interesting tool in understanding evolutionary processes associated with feeding habits. There is paucity of morphological information on the oropharyngeal cavity of the Trachemys adiutrix turtle. Thus, the aim of this study was to describe the tongue and palate morphology of T. adiutrix to establish a standard model for the species, providing information that may improve knowledge on the species feeding habits. Gross dissection, light microscopy and scanning electron microscopy assessments of 11 specimens were carried out. The tongue of T. adiutrix is triangular with a slightly rounded apex and broad base and lingual papillae widely distributed throughout the entire dorsal surface. The palate is composed of bony structures, displaying a triangular apex with one pair of choanae and palatine raphe that begin in the middle region, dividing the two openings. The body was elongated and smooth. The root was wrinkled and opened into the oesophagus. The tongue was lined by non‐keratinized stratified squamous epithelium, rich in mucous cells and a large number of different‐shaped papillae and taste buds. The palate was mainly lined by a pseudostratified cylindrical ciliated epithelium rich in mucous cells. In conclusion, the tongue and palate characteristics of T. adiutrix include evidence that these animals are semiaquatic, displaying morphological characteristics associated with aquatic and terrestrial trophic ecology, similar to that observed in other semiaquatic and terrestrial chelonian species.

show abstract

Section: Discussionmentioning

confidence: 99%

Morphological tongue and palate characterizations in Trachemys adiutrix (Vanzolini, 1995) turtles

Ferraz

Corrêa

Calvet

et al. 2023

Anat Histol Embryol

View full text Add to dashboard Cite

show abstract

“…Three functions for buccal oscillation in reptiles have previously been proposed: buccopharyngeal respiration (gas exchange), thermoregulation and olfaction. Aquatic buccal oscillation has been found to play a role in both buccopharyngeal respiration and olfaction in trionychids (Dunson, 1966), but is thought to primarily be concerned with olfaction in musk turtles (Root, 1949). Thermoregulation is a possible function of aerial buccal oscillation and has been thought to help in heat dissipation in some lizards (Heatwole et al, 1973) as well as birds (gular flutter).…”

Section: Functions Of Buccal Oscillationmentioning

confidence: 99%

“…Buccal oscillation in turtles involves expansion of the buccal cavity during which air or water is drawn into the buccal cavity through the nares and then compression of the buccal cavity during which air or water is expelled back out through the nares. Some aquatic turtles have been found to extract oxygen from the water through well-vascularized buccopharyngeal mucosa (Dunson, 1966). In these turtles, aquatic buccal oscillation may contribute to buccopharyngeal gas exchange by increasing the flow of oxygenated water across the buccopharyngeal mucosa.…”

Section: Introductionmentioning

confidence: 99%

Buccal oscillation and lung ventilation in a semi-aquatic turtle, Platysternon megacephalum

Druzisky

Brainerd

2001

Zoology

View full text Add to dashboard Cite

Sodium fluxes in fresh‐water turtles

Dunson

1967

J. Exp. Zool.

View full text Add to dashboard Cite

Fresh-water softshell turtles (Trionyx spinifer) showed net uptake of sodium from solutions as dilute as 5 pM. Chloride uptake could be accounted for by passive processes. There was no net uptake of potassium. Net sodium uptake was inhibited by low temperatures. Hibernation resulted in decreases in the sodium concentration and osmotic pressure of the plasma.Influx and efflux of sodium in the fresh-water turtle Pseudemys scripta varied from 0.04 to 10.1 pmoles/( 100 g hour). In hatchling turtles, the exchangeable sodium pool was 96% of the total sodium. The exchangeable pool was subdivided into at least two compartments, one rapidly and the other slowly exchanging. The latter compartment was 19 times larger than the former.Pseudemys scripta, was found to have a system for active uptake of sodium. This involves the membranous lining of the pharynx, the cloacal bursae and the cloaca. Aside from the skin and the shell, these are the only tissues in contact with environmental water. The cloaca1 region accounted for 48 to 68% of the sodium influx rate.Fresh-water turtles have encountered the same problems of ionic regulation faced by fresh-water fish and amphibians. In the latter the major problems, excess water intake and ion loss, have been counteracted in part by the formation of a copious dilute urine and the active uptake of sodium. Due to the impermeable appearance of reptilian skin, it was long believed that turtles would not need to take up sodium actively. Any extrarenal and renal losses of sodium were thought to be small enough to be made up in the food. This has not proved to be the case. Fresh-water softshell turtles (Trimyx spinifer) can actively obtain sodium from water containing as little as 5 VM of this cation (Dunson, '64; Dunson and Weymouth, '65 pool of the whole animal as well as investigations of isolated membranes suspected of being the sites of sodium uptake. Particular attention was devoted to examination of the transport capacities of the paired cloacal bursae (accessory bladders), the cloaca and the pharynx. MATERIALS AND METHODS Turtles

show abstract

Relation of the rate of hyoid movement to body weight and temperature in diving soft-shell turtles

Abstract: Standard hyoid rate (movements/g min) of soft-shell turtles (Trionyx spinifer) was inversely related to body weight. 2. The Q10 of standard hyoid rate was also inversely proportional to body weight.

Cited by 5 publications

References 6 publications

Morphological tongue and palate characterizations in Trachemys adiutrix (Vanzolini, 1995) turtles

Morphological tongue and palate characterizations in Trachemys adiutrix (Vanzolini, 1995) turtles

Buccal oscillation and lung ventilation in a semi-aquatic turtle, Platysternon megacephalum

Sodium fluxes in fresh‐water turtles

Contact Info

Product

Resources

About