Summer and Winter observations of the behaviour of the Euro Macropus robustus (Gould)

1969 ◽  
Vol 17 (4) ◽  
pp. 655 ◽  
Author(s):  
EM Russell
Keyword(s):  
Solar Radiation ◽  
New South ◽  
New South Wales ◽  
Activity Time ◽  
Complete Protection ◽  
Degree Of Protection ◽  
Air Temperatures ◽  
South Wales ◽  
Rocky Outcrop ◽  
Dense Tree

Types of habitat in which euros were seen during the day in summer in the far west of New South Wales are described. At air temperatures between 32.5 and 42.5�C, more animals were seen in shelters among a rocky outcrop providing almost complete protection from solar radiation than among dense tree-shrub shelters which did not afford the same degree of protection. At lower air temperatures, more animals were seen in tree-shrub shelters. The most noticeable features of the behaviour of the animals in these shelters were the relatively high proportion of time spent standing crouched and the time spent licking forelimbs and abdomen in relation to any other grooming activity. Time spent licking tends to increase at higher temperatures, and there is also a slight positive correlation between time spent standing and temperature.

Predictions of likely theft by ants of oversown seed for the Northern Tablelands of New South Wales

1976 ◽  
Vol 16 (79) ◽  
pp. 257 ◽  
Author(s):  
GG Johns ◽  
LR Greenup
Keyword(s):  
New South ◽  
New South Wales ◽  
Seed Type ◽  
Fine Weather ◽  
Air Temperatures ◽  
South Wales ◽  
Soil Temperatures ◽  
Seed Placement ◽  
Coated Seed ◽  
Observation Period

At Armidale, New South Wales, ant theft rates of pasture seeds at sites that had been topdressed with 10 kg ha-1 seed immediately before a four day observation period averaged 27 per cent less than on areas where no such application was made. Strong regression relationships were established between theft rates of the various seed types and both air and soil temperatures, but no relationship was found between either relative humidity or soil water availability and theft rate. High theft rates recorded in the first 24 hours after seed placement were not sustained over longer periods of time. A relationship between the decline in theft rate and the quantity of seed available was established. A series of predictions have been made of the proportion of seed likely to remain during fine weather following oversowing in the Armidale environment. These predictions incorporate seed type, time since sowing and prevailing air temperatures. It is predicted that during winter 70 to 80 per cent of bare seed and 90 to 97 per cent of coated seed could remain 30 days after oversowing. During summer the comparable figures are 7 to 30 per cent and 22 to 36 per cent respectively.

Temperatures in wheat during radiation frost

1975 ◽  
Vol 15 (77) ◽  
pp. 818 ◽  
Author(s):  
H Marcellos ◽  
WV Single
Keyword(s):  
Triticum Aestivum ◽  
Minimum Temperature ◽  
New South ◽  
New South Wales ◽  
Soil Surface ◽  
Field Station ◽  
Air Temperatures ◽  
South Wales ◽  
Crop Development

Plant and air temperatures were measured during radiation frost within a crop of wheat (Triticum aestivum cv. Timgalen) grown in 1974 on the Liverpool Plains Field Station, Breeza, New South Wales. Observations were made at different heights within the canopy at several stages of crop development, and these were related to screen and grass minimum temperatures recorded in a meteorological enclosure adjacent to the crop. Coldest conditions were found near the surface of the crop where temperatures were as much as 2�C lower than those in middle regions of the canopy. The temperature just below the soil surface was between 4� and 6�C warmer than that of plant or air at 5 cm to 10 cm above its surface. Grass minimum temperature was linearly related to screen minimum and found to be 3�C lower. Either measurement was useful in estimating the lowest temperature within that canopy.

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