Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1644/06-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
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ISSN | 0022-2372 |
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 |
推荐引用方式 GB/T 7714 | 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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