The Scaling of Intake Rate in Mammalian Herbivores

1994 ◽  
Vol 143 (6) ◽  
pp. 1055-1082 ◽  
Author(s):  
Lisa A. Shipley ◽  
John E. Gross ◽  
Donald E. Spalinger ◽  
N. Thompson Hobbs ◽  
Bruce A. Wunder
Keyword(s):  
Intake Rate ◽  
Mammalian Herbivores

scholarly journals Mechanisms and implications of a type IV functional response for short-term intake rate of dry matter in large mammalian herbivores

2017 ◽  
Vol 86 (5) ◽  
pp. 1159-1168 ◽  
Author(s):  
Jean C. Mezzalira ◽  
Olivier J. F. Bonnet ◽  
Paulo C. de F. Carvalho ◽  
Lidiane Fonseca ◽  
Carolina Bremm ◽  
...  
Keyword(s):  
Functional Response ◽  
Dry Matter ◽  
Intake Rate ◽  
Short Term ◽  
Mammalian Herbivores ◽  
Type Iv

scholarly journals Mallards Feed Longer to Maintain Intake Rate under Competition on a Natural Food Distribution

Ethology ◽  
2011 ◽  
Vol 118 (2) ◽  
pp. 169-177 ◽  
Author(s):  
Jacintha G. B. van Dijk ◽  
Sjoerd Duijns ◽  
Abel Gyimesi ◽  
Willem F. de Boer ◽  
Bart A. Nolet
Keyword(s):  
Food Distribution ◽  
Natural Food ◽  
Intake Rate

scholarly journals Contrasting capabilities of two ungulate species to cope with extremes of aridity

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Melinda Boyers ◽  
Francesca Parrini ◽  
Norman Owen-Smith ◽  
Barend F. N. Erasmus ◽  
Robyn S. Hetem
Keyword(s):  
Climate Change ◽  
High Water ◽  
Future Climate Change ◽  
Body Temperatures ◽  
Wet Season ◽  
Trade Off ◽  
Ambient Temperatures ◽  
Mammalian Herbivores ◽  
Dry Seasons ◽  
Connochaetes Taurinus

AbstractSouthern Africa is expected to experience increased frequency and intensity of droughts through climate change, which will adversely affect mammalian herbivores. Using bio-loggers, we tested the expectation that wildebeest (Connochaetes taurinus), a grazer with high water-dependence, would be more sensitive to drought conditions than the arid-adapted gemsbok (Oryx gazella gazella). The study, conducted in the Kalahari, encompassed two hot-dry seasons with similar ambient temperatures but differing rainfall patterns during the preceding wet season. In the drier year both ungulates selected similar cooler microclimates, but wildebeest travelled larger distances than gemsbok, presumably in search of water. Body temperatures in both species reached lower daily minimums and higher daily maximums in the drier season but daily fluctuations were wider in wildebeest than in gemsbok. Lower daily minimum body temperatures displayed by wildebeest suggest that wildebeest were under greater nutritional stress than gemsbok. Moving large distances when water is scarce may have compromised the energy balance of the water dependent wildebeest, a trade-off likely to be exacerbated with future climate change.

scholarly journals Influence of Residual Feed Intake and Cow Age on Dry Matter Intake Post-Weaning and Peak Lactation of Black Angus Cows

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1822
Author(s):  
Cory T. Parsons ◽  
Julia M. Dafoe ◽  
Samuel A. Wyffels ◽  
Timothy DelCurto ◽  
Darrin L. Boss
Keyword(s):  
Milk Production ◽  
Feed Intake ◽  
Dry Matter ◽  
Free Choice ◽  
Residual Feed Intake ◽  
Beef Cows ◽  
Age Effect ◽  
Dry Matter Intake ◽  
Intake Rate ◽  
Two Stages

We evaluated heifer post-weaning residual feed intake (RFI) classification and cow age on dry matter intake (DMI) at two stages of production. Fifty-nine non-lactating, pregnant, (Study 1) and fifty-four lactating, non-pregnant (Study 2) commercial black Angus beef cows were grouped by age and RFI. Free-choice, hay pellets were fed in a GrowSafe feeding system. In Study 1, cow DMI (kg/d) and intake rate (g/min) displayed a cow age effect (p < 0.01) with an increase in DMI and intake rate with increasing cow age. In Study 2, cow DMI (kg/d) and intake rate (g/min) displayed a cow age effect (p < 0.02) with an increase in DMI and intake rate with increasing cow age. Milk production displayed a cow age × RFI interaction (p < 0.01) where both 5–6-year-old and 8–9-year-old low RFI cows produced more milk than high RFI cows. For both studies, intake and intake behavior were not influenced by RFI (p ≥ 0.16) or cow age × RFI interaction (p ≥ 0.21). In summary, heifer’s post-weaning RFI had minimal effects on beef cattle DMI or intake behavior, however, some differences were observed in milk production.

scholarly journals Effects of COVID-19 pandemic on breastfeeding rates in a neonatal intensive care unit

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Asli Okbay Gunes ◽  
Emre Dincer ◽  
Nilgun Karadag ◽  
Sevilay Topcuoglu ◽  
Guner Karatekin
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Breast Milk ◽  
Neonatal Intensive Care Unit ◽  
Neonatal Intensive Care ◽  
Control Group ◽  
Study Group ◽  
Intake Rate ◽  
Informed Consent Form ◽  
Group 2

Abstract Objectives To find out if the expressed breast milk delivery rate to neonatal intensive care unit (NICU) for babies who were hospitalized for any reason other than COVID-19, and exclusive breastfeeding (EB) rates between discharge date and 30th day of life of those babies were affected by COVID-19 pandemic. Methods Babies who were hospitalized before the date first coronavirus case was detected in our country were included as control group (CG). The study group was divided into two groups; study group 1 (SG1): the mothers whose babies were hospitalized in the period when mother were asked not to bring breast milk to NICU, study group 2 (SG2): the mothers whose babies were hospitalized after the date we started to use the informed consent form for feeding options. The breast milk delivery rates to NICU during hospitalization and EB rates between discharge and 30th day of life were compared between groups. Results Among 154 mother-baby dyads (CG, n=50; SG1, n=46; SG2, n=58), the percentage of breast milk delivery to NICU was 100%, 79% for CG, SG2, respectively (p<0.001). The EB rate between discharge and 30th day of life did not change between groups (CG:90%, SG1:89%, SG2:75.9; p=0.075). Conclusions If the mothers are informed about the importance of breast milk, the EB rates are not affected by the COVID-19 pandemic in short term, even if the mothers are obligatorily separated from their babies. The breast milk intake rate of the babies was lowest while our NICU protocol was uncertain, and after we prepared a protocol this rate increased.

scholarly journals Mammalian herbivores restrict the altitudinal range limits of alpine plants

2021 ◽  
Author(s):  
Joshua S. Lynn ◽  
Tom E. X. Miller ◽  
Jennifer A. Rudgers
Keyword(s):  
Alpine Plants ◽  
Range Limits ◽  
Mammalian Herbivores ◽  
Altitudinal Range

Spatial Pattern of Ratio-Dependent Predator–Prey Model with Prey Harvesting and Cross-Diffusion

2019 ◽  
Vol 29 (03) ◽  
pp. 1950036 ◽  
Author(s):  
R. Sivasamy ◽  
M. Sivakumar ◽  
K. Balachandran ◽  
K. Sathiyanathan
Keyword(s):  
Temporal Dynamics ◽  
Intake Rate ◽  
Diffusion Term ◽  
Predator Prey ◽  
Cross Diffusion ◽  
Predator Prey Model ◽  
Prey Model ◽  
Nonlinear Harvesting ◽  
Ratio Dependent ◽  
The Cross

This study focuses on the spatial-temporal dynamics of predator–prey model with cross-diffusion where the intake rate of prey is per capita predator according to ratio-dependent functional response and the prey is harvested through nonlinear harvesting strategy. The permanence analysis and local stability analysis of the proposed model without cross-diffusion are analyzed. We derive the conditions for the appearance of diffusion-driven instability and global stability of the considered model. Also the parameter space for Turing region is specified by keeping the cross-diffusion coefficient as one of the crucial parameters. Numerical simulations are given to justify the proposed theoretical results and to show that the cross-diffusion term plays a significant role in the pattern formation.

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