Seasonal Changes in Chaparral Composition and Intake by Spanish Goats1
نویسندگان
چکیده
2Ph.D. Candidate and Research Assistant, Animal Science Dept., University of California, Davis; Professor of Animal Science and Physiological Sciences, University of California, Davis; Associate Professor of Botany, University of California, Davis; and Research Leader, Production Systems, US Meat Animal Research Center, Clay Center, Nebraska. Abstract: Seasonal changes in utilization of one year regrowth of chaparral by Spanish goats was investigated. Esophageal and fecal samples were obtained during spring, summer and fall of 1979. Preference of Spanish goats was highly directed towards oak (50%) and chamise (30%) in all seasons. Correlation of use and availability indicated that goats may be generalist but select between the dominant species. Tannins were at low concentrations and did not appear to be affecting utilization. Predictive equations for intake and digestibility were derived. Recently burnt chaparral provides a maintenance diet for Spanish goats during spring and summer only.
منابع مشابه
The effects of vegetation phenology on endmember selection and species mapping in southern California chaparral
Image classification typically utilizes single-date imagery and does not take into account seasonal variation in the spectral characteristics and separability of image spectra. While global vegetation classifications have relied on seasonal changes in multitemporal data, seasonal vegetation dynamics have seldom been explored at higher spatial and spectral resolutions. In particular, investigati...
متن کاملShort communication: Seasonal Changes in Biochemical Composition and Meat Yield of Shabut (Barbus grypus, Heckel 1843)
متن کامل
Reconciling seasonal hydraulic risk and plant water use through probabilistic soil-plant dynamics.
Current models used for predicting vegetation responses to climate change are often guided by the dichotomous needs to resolve either (i) internal plant water status as a proxy for physiological vulnerability or (ii) external water and carbon fluxes and atmospheric feedbacks. Yet, accurate representation of fluxes does not always equate to accurate predictions of vulnerability. We resolve this ...
متن کاملShort communication: Seasonal Changes in Biochemical Composition and Meat Yield of Shabut (Barbus grypus, Heckel 1843)
متن کامل
Seasonal changes in tissue-water relations for eight species of ferns during historic drought in California.
PREMISE OF THE STUDY California experienced severe drought between 2012 and 2016. During this period, we compared seasonal changes in tissue-water relations among eight fern species in the Santa Monica Mountains of southern California to elucidate differential mechanisms of drought survival and physiological performance during extreme water deficits. METHODS We monitored seasonal changes in w...
متن کامل