Diet selection of the Chilean stone crab Homalaspis plana

1983 ◽  
Vol 77 (1) ◽  
pp. 79-83 ◽  
Author(s):  
C. Morales ◽  
T. Antezana
Keyword(s):  
Diet Selection ◽  
Stone Crab ◽  
Selection Of

Diet selection of sheep: sodium bicarbonate, but not the offering of hay, modifies the effect of urea on diet selection

2002 ◽  
Vol 74 (2) ◽  
pp. 357-367 ◽  
Author(s):  
S. M. James ◽  
I. Kyriazakis ◽  
G. C. Emmans ◽  
B. J. Tolkamp
Keyword(s):  
Sodium Bicarbonate ◽  
Live Weight ◽  
Diet Selection ◽  
Metabolizable Energy ◽  
Fresh Matter ◽  
Total Food Intake ◽  
Period 2 ◽  
Control Food ◽  
Selection Of

AbstractThe hypotheses tested were that the expected preference of sheep for a food with adequate rumen degradable protein (RDP) supplemented with urea would be reduced both by the addition of a buffer (sodium bicarbonate (SB)) and by offering ad libitum access to hay. A control food (C), calculated to be adequate in its ratio of effective RDP to fermentable metabolizable energy (fME), was formulated. Other foods were made by adding 12·5 (U1) or 25 (U2) g urea per kg fresh matter (FM) to C and 20 g SB per kg FM to C, U1and U2. The acid buffering capacity (ABC) of each food was measured in vitro. The experiment consisted of two successive periods, each of 4 weeks. Ninety-eight female, Texel ✕ Greyface sheep were randomly allocated to 14 groups each with seven animals. Groups 1 to 6 were offered one of: C, U2, C + SB, U2+ SB, C with hay or U2with hay throughout the experiment. Groups 7 to 10 were offered the choices of C v. U1or C v. U2, either with or without hay in a change-over design; animals that received hay during period 1 (groups 8 and 10) did not do so during period 2 and vice versa (groups 7 and 9). Groups 11 to 14 (no. = 7) were offered the choices of C v. U1or C v. U2, either with or without SB supplemented to both foods, in a change-over design. Adding either urea, or SB, or both to C had no effects on intake or live-weight gain when offered alone. Both supplements significantly (P 0·001) increased the ABC of food C. Throughout the experiment hay consumption was very low (overall mean: 23 (s.e. 2·5) g hay per sheep day). Offering hay caused no change in the preference for the urea-supplemented foods. Sheep offered the choices C v. U1or C v. U2, with neither hay nor SB, selected 0.466 (s.e. 0·036) and 0.588 (s.e. 0·025) kg/kg total food intake (TFI) of U1and U2respectively. The proportions of the urea-supplemented foods were significantly reduced (P 0.01) by SB supplementation: to 0.348 (s.e.0·045) and 0·406 (s.e.0·059) kg/kg TFI of U1and U2respectively. The effect of SB addition on the diet selection of sheep could be due to its buffering properties. When SB is added to both foods the need for urea to be used as a buffer is reduced with a consequent decrease in the proportion selected as the urea-supplemented food. Effects of diet on buffering may override other diet selection objectives, such as the avoidance of an excess intake of RDP.

Selection of diets differing in sulphur content by sheep in sulphur adequate or depleted states

1998 ◽  
Vol 1998 ◽  
pp. 28-28
Author(s):  
J. Hills ◽  
J.V. Nolan ◽  
G.N. Hinch ◽  
J.J. Lynch
Keyword(s):  
Crude Protein ◽  
Diet Selection ◽  
Sulphur Content ◽  
State Study ◽  
Micro Organisms ◽  
Selection Of

Recent studies have shown that when offered a choice of feeds with different concentrations of a particular nutrient (crude protein), sheep can select a diet that meets their current requirements (Kyriazakis and Oldham 1993). To further examine this diet selection behaviour a choice of foods differing in the concentration of S was offered to sheep that were either in a sulphur (S) adequate or a S depleted state. Study of S selection was considered to be the next logical step after protein because of its role in the synthesis of proteins by the rumen micro-organisms.

Diet selection of lesser white-fronted geeseAnser erythropusat a spring staging area

Ecography ◽  
2003 ◽  
Vol 26 (6) ◽  
pp. 705-714 ◽  
Author(s):  
Juha Markkola ◽  
Marika Niemelä ◽  
Seppo Rytkönen
Keyword(s):  
Diet Selection ◽  
Staging Area ◽  
Selection Of

Phosphorus limitation relates to diet selection of sheep and goats on dry calcareous grassland

2015 ◽  
Vol 19 (1) ◽  
pp. 101-110 ◽  
Author(s):  
Pavla Hejcmanová ◽  
Pavlína Pokorná ◽  
Michal Hejcman ◽  
Vilém Pavlů
Keyword(s):  
Phosphorus Limitation ◽  
Diet Selection ◽  
Calcareous Grassland ◽  
Sheep And Goats ◽  
Selection Of

The interactive effects of novel food flavours and food composition on the diet selection of sheep

2001 ◽  
Vol 2001 ◽  
pp. 61-61
Author(s):  
G. Arsenos ◽  
I. Kyriazakis
Keyword(s):  
Feeding Behaviour ◽  
Nutrient Content ◽  
Diet Selection ◽  
Food Composition ◽  
Interactive Effects ◽  
Nutrient Requirements ◽  
Organoleptic Properties ◽  
Novel Food ◽  
Selection Of

Animals have predispositions towards the organoleptic properties, such as flavours, of the foods available to them. These predispositions can influence the feeding behaviour and diet selection of animals and prevent from, or enable them to select a diet that meets their nutrient requirements, in both short - and longer - run (Forbes and Kyriazakis, 1995). In this experiment, we investigated whether predispositions of sheep for novel food flavours could affect their diet selection when offered a choice between two foods with different nutrient content. The specific hypotheses tested were that such predispositions are: (i ) influenced by the nutritional quality of the food that are associated with, and (ii) affected by the current nutritional state of the animal.

scholarly journals Seasonal Diet Selection of Cattle Grazing a Montane Riparian Community

2004 ◽  
Vol 57 (5) ◽  
pp. 539 ◽  
Author(s):  
Steven G. Evans ◽  
Andrew J. Pelster ◽  
Wayne C. Leininger ◽  
M. J. Trlica
Keyword(s):  
Cattle Grazing ◽  
Diet Selection ◽  
Selection Of

Seasonal changes in diet and diet selection of great bustards (Otis t. tarda) in north-west Spain

1999 ◽  
Vol 247 (2) ◽  
pp. 201-214 ◽  
Author(s):  
S. J. Lane ◽  
J. C. Alonso ◽  
J. A. Alonso ◽  
M. A. Naveso
Keyword(s):  
Seasonal Changes ◽  
Diet Selection ◽  
North West ◽  
Selection Of

scholarly journals Effect of Previous Experience on Grazing Patterns and Diet Selection of Brangus Cows in the Chihuahuan Desert

2010 ◽  
Vol 63 (2) ◽  
pp. 223-232 ◽  
Author(s):  
Derek W. Bailey ◽  
Milton G. Thomas ◽  
John W. Walker ◽  
Barbara K. Witmore ◽  
Doug Tolleson
Keyword(s):  
Chihuahuan Desert ◽  
Diet Selection ◽  
Previous Experience ◽  
Selection Of
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