scholarly journals Effects of necklace radio transmitters on survival and breeding success of red grouse Lagopus lagopus scoticus

1995 ◽  
Vol 1 (1) ◽  
pp. 121-126 ◽  
Author(s):  
Simon J. Thirgood ◽  
Stephen M. Redpath ◽  
Peter J. Hudson ◽  
Martha M. Hurley ◽  
Nicholas J. Aebischer
Keyword(s):  
Breeding Success ◽  
Red Grouse ◽  
Lagopus Lagopus ◽  
Radio Transmitters ◽  
Lagopus Lagopus Scoticus

scholarly journals Studies on louping-ill virus (Flavivirus group) in wild red grouse (Lagopus lagopus scoticus)

1978 ◽  
Vol 81 (2) ◽  
pp. 321-329 ◽  
Author(s):  
H. W. Reid ◽  
J. S. Duncan ◽  
J. D. P. Phillips ◽  
R. Moss ◽  
A. Watson
Keyword(s):  
Virus Infection ◽  
Breeding Success ◽  
Free Living ◽  
Red Grouse ◽  
Lagopus Lagopus ◽  
Louping Ill ◽  
Lagopus Lagopus Scoticus

SummaryStudies were made to find evidence of louping-ill virus infection in free-living red grouse and relate this to their breeding success. In areas where ticks were abundant 61 (84%) adult grouse had antibody to the virus compared with 1 (10%) in areas where ticks were relatively scarce. Of 162 chicks tested 25 were shown to be viraemic. Infected chicks were of significantly less weight than comparably aged uninfected birds and the probability that they died was much greater than that of uninfected birds. It is concluded that the relatively poor breeding success in areas of high tick numbers was principally due to infection with louping-ill virus. The susceptibility of the red grouse to infection is discussed.

The energetic consequences of parasitism: effects of a developing infection of Trichostrongylus tenuis (Nematoda) on red grouse (Lagopus lagopus scoticus) energy balance, body weight and condition

Parasitology ◽  
1995 ◽  
Vol 110 (4) ◽  
pp. 473-482 ◽  
Author(s):  
R. J. Delahay ◽  
J. R. Speakman ◽  
R. Moss
Keyword(s):  
Energy Balance ◽  
Resting Metabolic Rate ◽  
Red Grouse ◽  
Lagopus Lagopus ◽  
Energy Imbalance ◽  
Daily Energy ◽  
Total Daily Energy Expenditure ◽  
Synchronous Development ◽  
Lagopus Lagopus Scoticus ◽  
Trichostrongylus Tenuis

SUMMARYThe timing of the energetic consequences of a developing, single-dose infection of Trichostrongylus tenuis larvae was investigated in captive red grouse Lagopus lagopus scoticus. At 12 days post-infection (p.i.), infected birds had a resting metabolic rate 16% greater than controls and thenceforth lost weight at a faster rate than controls. At 16 days p.i. infected birds consumed 38% less energy and excreted 33% less energy than controls. The estimated total daily energy expenditure and energy expended on activity for infected birds at 16 days p.i. were 36% and 83% lower, respectively, than for controls. Infected birds lost condition from 16 days p.i. onwards. The period of energy imbalance at 12–16 days p.i. coincided with development of late 4th-stage larvae into adult worms and the onset of patency. After this, the effects on energy balance diminished. Synchronous development of previously arrested T. tenuis larvae in wild birds in spring probably has similar effects to those reported here and places grouse under conditions of energy imbalance. The observed effects on energy balance provide a possible mechanism by which the parasite can reduce fecundity and survival of infected grouse.

Growth Rate, Condition and Survival of Red Grouse Lagopus lagopus scoticus Chicks

1993 ◽  
Vol 24 (4) ◽  
pp. 303 ◽  
Author(s):  
R. Moss ◽  
A. Watson ◽  
R. A. Parr ◽  
I. B. Trenholm ◽  
M. Marquiss
Keyword(s):  
Growth Rate ◽  
Red Grouse ◽  
Rate Condition ◽  
Lagopus Lagopus ◽  
Lagopus Lagopus Scoticus

Testosterone and autumn territorial behavior in male red grouse Lagopus lagopus scoticus

2005 ◽  
Vol 47 (5) ◽  
pp. 576-584 ◽  
Author(s):  
François Mougeot ◽  
Alistair Dawson ◽  
Steve M. Redpath ◽  
Fiona Leckie
Keyword(s):  
Territorial Behavior ◽  
Red Grouse ◽  
Lagopus Lagopus ◽  
Lagopus Lagopus Scoticus

Development and survival of the free-living stages of Trichostrongylus tenuis, a caecal parasite of red grouse Lagopus lagopus scoticus

Parasitology ◽  
1989 ◽  
Vol 99 (1) ◽  
pp. 105-113 ◽  
Author(s):  
J. L. Shaw ◽  
R. Moss ◽  
A. W. Pike
Keyword(s):  
Soil Surface ◽  
Winter Survival ◽  
Free Living ◽  
Red Grouse ◽  
Lagopus Lagopus ◽  
Infective Larvae ◽  
Surface Temperatures ◽  
The Mean ◽  
Lagopus Lagopus Scoticus ◽  
Trichostrongylus Tenuis

SUMMARYIn the laboratory, yields of infective 3rd-stage larvae of Trichostrongylus tenuis were determined by temperature when moisture was adequate. On the moor, eggs in caecal faeces did not develop to infective larvae during the winter. In summer, development did occur and yields of infective larvae were related to temperature: greatest yields were obtained when mean monthly soil surface temperatures ranged between 76 and 103°C. Rainfall was unimportant, as was desiccation. During summer the mean monthly mortality of infective larvae was 44% but over winter survival was negligible.

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