Chicken Pen Research Articles

The Language of Scholars as Display

Display — an expression from ethology. One thinks of a rooster in a chicken pen. Thus, the very choice of terms shows that we shall not be speaking of the professional language of the scholar at all, but rather exploring the underlying social and sociopsychological dimension of scientific language.

The subgenus Persicargas (Ixodoidea, Argasidae, Argas). 2. A. (P.) abdussalami, new species, associated with wild birds on trees and buildings near Lahore, Pakistan.

Adults, nymphs, and larvae of Argas (Persicargas) abdussalami , new species, are described from the environs of Lahore, Pakistan. These ticks were found on limbs of trees in which the White-backed Vulture, Gyps (= Pseudogyps) bengalensis (Gmelin), and other wild birds nest, as well as on walls of buildings where pigeons nest. A single collection was taken from a domestic chicken pen; only A. (P.) persicus , however, was present in all other lots associated with domestic chicken in this area. This species differs distinctly in each developmental stage from A. (P.) persicus (Oken), as well as from A. (P.) arboreus Kaiser, Hoogstraal, and Kohls, of northern and southern Africa, and from A. (P.) beklemischevi Pospelova-Shtrom, Vassilieva, and Semaschko, of Turkmenia SSR. Unpublished data suggest the significant role of this group of ticks as reservoirs and vectors of certain arboviruses infecting humans and birds.

Sôbre alguns Phlebotomus e Brumptomyia da Colômbia (Diptera, Psychodidae)

Sôbre alguns Phlebotomus e Brumptomyia da Colômbia (Diptera, Psychodidae)

Control of the common poultry ascarid by treating the soil with sodium pentachlorophenate.

Chicken pens previously infested with eggs of Ascaridia lineata were sprayed with formulations containing sodium pentachlorophenate, an alkyl polyamine, and 2-benzyl-4-chlorophenol.Six-week-old chickens were placed in the treated pens for eight days, then sacrificed. The larval ascarids recovered from the intestines were counted.The ovicidal activity of sodium pentachlorophenate was manifest by almost 65% reduction of worm burden which developed in susceptible young chickens. The other compounds investigated appeared to be relatively ineffective.

The Measurement of Adult Populations of the Eye Gnat, Hippelates Pusio1

A bait trap of new design is described. It was used in southwest Georgia to capture large numbers of the Hippelates pusio group (H. pusio Loew and H. bishoppi Sabrosky); other species also captured were easily recognized and removed from collections. In large catches where H. bishoppi was also taken, it was found practical to obtain satisfactory estimates of H. pusio by weighing the collections at a fixed humidity and determining the ratio of the species in samples of about 100 specimens. When H. bishoppi drops below 10% in the catches, the numbers of H. pusio can be estimated with the same reliability by identifying smaller samples. H. pusio reached its seasonal peaks from July through September; H. bishoppi showed a similar pattern but appeared to decline more rapidly. H. pusio was caught in small numbers when traps were located at a distance from any known attractants, with the object of sampling hypothetically uniform areas, but when traps were set beside animal enclosures it was taken in large numbers. The numbers of gnats trapped beside chicken pens were significantly correlated with the numbers of fowl in the pens. Net and aspirator collections made near and on mammals consisted almost entirely of H. pusio. The proximity of animal enclosures had little or no effect on the trap catches of H. bishoppi, and since this species was never taken under circumstances that would prove attraction to a mammalian or an avian host, its numbers should not be included with those of H. pusio for epidemiological purposes. The numbers of gnats observed about human subjects were found unsuitable for calculating a prevalence index, even though they were found to be correlated with the size of trap catches in nine communities with a wide range of gnat prevalence during a period when trapping showed a marked seasonal change. Gnats observed on and about the heads of children were significantly more abundant when the subject had a history of conjunctivitis, also when the child was “active in the open” rather than “inactive in the shade.”