NEONATAL LAMB LOSSES DUE TO FERAL PIG PREDATION     

J. W. Plant  R. Marchant  T. D. Mitchell  J. R. Giles 《Australian veterinary journal》1978,54(9):426-429

SUMMARY: An investigation into causes of low lamb marking percentages was made on a property in north-west New South Wales from 1971 to 1975. Investigations revealed that from 11 to 70% of the ewes in lamb were losing all their lambs. Observations suggested that feral pig predation was a factor in the perinatal loss.
In 1975, 2 groups of ewes were placed in adjoining paddocks prior to lambing. Feral pigs were excluded from one paddock for most of lambing by means of an electric fence. In this paddock, 117% of lambs were marked compared with 80% in the adjoining paddock. It was estimated that in 1975 over 600 lambs were killed by feral pigs from 1,422 ewes lambing in paddocks with feral pigs.
The problems involved in the diagnosis of feral pig predation are discussed.  相似文献   

Sarcocystosis in an aborted bovine fetus     

C B Hong  R C Giles  L E Newman  R Fayer 《Journal of the American Veterinary Medical Association》1982,181(6):585-588

Sarcocystosis was diagnosed in an aborted bovine fetus. Immature and mature schizonts of Sarcocystis were disseminated in the vascular endothelium of all organs, but especially the brain. Microscopic granulomas, focal gliosis, and petechial hemorrhages in the neuropil were scattered in the brain. Multifocal collections of mononuclear cells were observed in the kidney, liver and heart. Organisms in sections of frozen tissues were demonstrated by immunofluorescent techniques to be Sarcocystis.  相似文献   

Electrocution of pigs.     

N Giles  J R Simmons 《The Veterinary record》1975,97(16):305-306

Electrocution was considered to have caused 28 deaths in a house of 109 fat pigs. Post mortem examination showed haemorrhages at varying sites. Another 35, showing varying degrees of paralysis, were sent for slaughter. In most of these the pelvis was fractured and in some the vertebral column in the lumbosacral region. Twenty eight were condemned, 26 of them because of haemorrhages and because of spoilage associated with rupture of the urinary bladder.  相似文献   

Self-powered tail light     

W. J. Hooker 《American Journal of Potato Research》1957,34(7):217-217

  相似文献   

Minutes of executive committee meeting Plant Industry Station—Beltsville,Maryland December 1, 1957—5:00 p.m.     

W. J. Hooker 《American Journal of Potato Research》1958,35(2):413-413

  相似文献   

New forest eye in cattle.     

M B de Giles 《The Veterinary record》1976,98(2):31-32

  相似文献   

Cerebrocortical necrosis in a fallow deer (Dama dama)   总被引：1，自引：0，他引：1  

L M Markson  N Giles 《The Veterinary record》1973,93(9):243-246

  相似文献   

Plant science. Nodules and hormones     

Oldroyd GE 《Science (New York, N.Y.)》2007,315(5808):52-53

  相似文献   

ggr-Aminobutyric Acid, a Neurotransmitter, Induces Planktonic Abalone Larvae to Settle and Begin Metamorphosis     

Morse DE  Hooker N  Duncan H  Jensen L 《Science (New York, N.Y.)》1979,204(4391):407-410

gamma-Aminobutyric acid (a simple amino acid and potent neurotransmitter in human brain and other tissues of higher animals) and certain of its congeners rapidly and synchronously induce planktonic larvae of the red abalone, Haliotis rufescens, to settle and commence behavioral and developmental metamorphosis. These naturally occurring inducers of algal origin apparently are responsible, in part, for the substrate-specific recruitment, induction of settling, and the onset of metamorphosis of abalone and other planktonic larvae upon specific algae which provide naturally favorable habitats for the young of these species in coastal waters. These observations provide a convenient experimental model for further analysis of the basic molecular mechanisms by which environmental and endogenous factors control the recruitment and development of planktonic larvae. Halogenated organic pesticides significantly interfere with larval settling, as quantified in a new bioassay based upon these findings.  相似文献   

An astronomical 2175 angstrom feature in interplanetary dust particles     

Bradley J  Dai ZR  Erni R  Browning N  Graham G  Weber P  Smith J  Hutcheon I  Ishii H  Bajt S  Floss C  Stadermann F  Sandford S 《Science (New York, N.Y.)》2005,307(5707):244-247

The 2175 angstrom extinction feature is the strongest (visible-ultraviolet) spectral signature of dust in the interstellar medium. Forty years after its discovery, the origin of the feature and the nature of the carrier(s) remain controversial. Using a transmission electron microscope, we detected a 5.7-electron volt (2175 angstrom) feature in interstellar grains embedded within interplanetary dust particles (IDPs). The carriers are organic carbon and amorphous silicates that are abundant in IDPs and in the interstellar medium. These multiple carriers may explain the enigmatic invariant central wavelength and variable bandwidth of the astronomical 2175 angstrom feature.  相似文献