干旱区生态环境知识资源中心(Arid): Diet effect on osmoregulation in the subterranean rodent Ctenomys talarum

Arid

DOI	10.1016/j.cbpa.2019.06.002
	Diet effect on osmoregulation in the subterranean rodent Ctenomys talarum
	Baldo, Maria Belen; Antenucci, C. Daniel
通讯作者	Baldo, Maria Belen
来源期刊	COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY
ISSN	1095-6433
EISSN	1531-4332
出版年	2019
卷号	235 页码:148-158
英文摘要	Water conservation requires osmoregulatory skills, sometimes limited by the environment and/or physiological and behavioral characteristics acquired along the evolutionary history of the species. Fossoriality had probably emerged as a survival mechanism to face increasing aridity, as suggested for Ctenomys, a genus that radiated to different environments. Ctenomys talarum (tuco-tuco) is an herbivorous subterranean rodent that lives in coastal grasslands inside humid burrows that reduce evaporation. However, their osmoregulatory mechanisms may be challenged by atmospheric variations when foraging aboveground and by the annual variability in dietary water and salt content. Then, it is of great interest to identify how much of this flexibility of C.talarum is attributed to physiological regulation. We analyzed the effect of water and salt content of diet on urinary, plasmatic, fecal and respiratory parameters. Tuco-tucos were not able to maintain their body weight under the offered monodiet, especially under the low hydrated diet, which explains its generalist and opportunistic foraging behavior. C. talarum mainly obtained water through food, whereas water metabolic production was negligible. Evaporative water loss did not vary between diets, but individuals under water restriction showed decreased fecal water loss and urine volume, high urine concentration but stable plasmatic osmolality and ionic concentration values. Under salt stress, urinary parameters remained relatively stable and high plasmatic osmolality was detected. Despite C. talarum produced more diluted urine than rodents from xeric environments, it is able to concentrate it 4 times above than the required at field even under the lowest water availability. This may be a characteristic associated with the evolutionary history of the species, which evolved in an arid context.
英文关键词	Osmoregulation Seasonality Diet Physiology Behavior Fossoriality Ctenomys talarum
类型	Article
语种	英语
国家	Argentina
收录类别	SCI-E
WOS记录号	WOS:000481561100015
WOS关键词	EVAPORATIVE WATER-LOSS ; DESERT RODENT ; TUCO-TUCOS ; CONCENTRATING ABILITY ; HEAT-LOSS ; TEMPERATURE ; CAVIOMORPHA ; METABOLISM ; ECONOMY ; OCTODONTIDAE
WOS类目	Biochemistry & Molecular Biology ; Physiology ; Zoology
WOS研究方向	Biochemistry & Molecular Biology ; Physiology ; Zoology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214948
作者单位	Univ Nacl Mar del Plata, CONICET, IIMyC, Lab Ecol Fisiol & Comportamiento, Dean Funes 3250, RA-7600 Mar Del Plata, Buenos Aires, Argentina
推荐引用方式 GB/T 7714	Baldo, Maria Belen,Antenucci, C. Daniel. Diet effect on osmoregulation in the subterranean rodent Ctenomys talarum[J],2019,235:148-158.
APA	Baldo, Maria Belen,&Antenucci, C. Daniel.(2019).Diet effect on osmoregulation in the subterranean rodent Ctenomys talarum.COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY,235,148-158.
MLA	Baldo, Maria Belen,et al."Diet effect on osmoregulation in the subterranean rodent Ctenomys talarum".COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR & INTEGRATIVE PHYSIOLOGY 235(2019):148-158.