Arid
DOI10.1644/06-MAMM-A-046R1.1
Spatial and seasonal plasticity in digestive morphology of cavies (Microcavia australis) inhabiting habitats with different plant qualities
Sassi, Paola L.; Borghi, Carlos E.; Bozinovic, Francisco
通讯作者Sassi, Paola L.
来源期刊JOURNAL OF MAMMALOGY
ISSN0022-2372
出版年2007
卷号88期号:1页码:165-172
英文摘要

Ecological physiology examines how animals cope with changing environmental demands. In low-productivity desert habitats, small mammals should consume low-quality, high-fiber food as a consequence of necessity rather than by choice. Diet quality of populations can differ at both spatial and temporal scales. Nevertheless, spatial and temporal variation in the digestive system has not been extensively studied in the field. We captured individuals from 4 populations of Microcavia australis and measured their digestive morphological traits. Fieldwork was carried out in 4 localities belonging to and and semiarid regions, in dry and wet seasons. We also estimated diet quality for each population and season. We found significant effects of sex, season, and site on the size of digestive organs. The concentration of fiber and nitrogen in the plants consumed differed between populations and varied seasonally: dietary fiber was higher in the dry season and nitrogen concentration was higher in the wet season. As predicted by theory, the cecum, the organ most closely related to cellulose fermentation, was significantly larger in animals facing the lowest quality diet. The other organs also were affected by reproductive state and water requirements. Intraspecific variation in the digestive morphology of M. australis probably helps this species cope with remarkable seasonal and geographical variability.


英文关键词digestive traits environment variation intraspecific variation low-quality food Microcavia australis nutritional requirements
类型Article
语种英语
国家Argentina ; Chile
收录类别SCI-E
WOS记录号WOS:000244623500019
WOS关键词ABROTHRIX-ANDINUS CRICETIDAE ; MOUSE PHYLLOTIS-DARWINI ; MONTE DESERT BIOME ; DIET QUALITY ; MICROTUS-OCHROGASTER ; ENERGY-REQUIREMENTS ; HERBIVOROUS RODENT ; GUT MORPHOLOGY ; FOOD QUALITY ; BODY-SIZE
WOS类目Zoology
WOS研究方向Zoology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/155173
作者单位(1)Ctr Reg Invest Cientif & Tecnol, Biodivers Res Grp, Inst Argentino Invest Zonas Aridas, RA-5500 Mendoza, Argentina;(2)Pontificia Univ Catolica Chile, Dept Ecol, Ctr Adv Studies Ecol & Biodivers, Santiago, Chile
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Sassi, Paola L.,Borghi, Carlos E.,Bozinovic, Francisco. Spatial and seasonal plasticity in digestive morphology of cavies (Microcavia australis) inhabiting habitats with different plant qualities[J],2007,88(1):165-172.
APA Sassi, Paola L.,Borghi, Carlos E.,&Bozinovic, Francisco.(2007).Spatial and seasonal plasticity in digestive morphology of cavies (Microcavia australis) inhabiting habitats with different plant qualities.JOURNAL OF MAMMALOGY,88(1),165-172.
MLA Sassi, Paola L.,et al."Spatial and seasonal plasticity in digestive morphology of cavies (Microcavia australis) inhabiting habitats with different plant qualities".JOURNAL OF MAMMALOGY 88.1(2007):165-172.
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