Changes to benthic infauna caused by scallop dredging at a site in Port Phillip Bay, southeastern Australia, were examined experimentally using a BACl (before, after, control, impact) design. The experimental dredging was undertaken by commercial fishermen and was typical of normal commercial operations in its spatial extent, intensity and duration Changes to benthic community structure followi...

We present a new multivariate technique for testing the significance of individual terms in a multifactorial analysis-of-variance model for multispecies response variables. The technique will allow researchers to base analyses on measures of association (distance measures) that are ecologically relevant. In addition, unlike other distance-based hypothesis-testing techniques, this method allows ...

The addition of pond ash (fly ash that has been placed in evaporative ponds and subsequently dewatered) to feedlot surfaces provides a healthier environment for livestock and economic advantages for the feedlot operator. However, the water quality effects of pond ash amended surfaces are not well understood. The objectives of this field investigation were to: (1) compare feedlot soil properties...

The placement of stiff-stemmed grass hedges on the contour along a hill slope has been shown to decrease runoff nutrient transport. This study was conducted to measure the effectiveness of a narrow grass hedge in reducing runoff nutrient transport from plots with a range of soil nutrient values. Composted beef cattle manure was applied at dry weights of 0, 68, 105, 142, and 178 Mg ha-1 to a sil...

In the Americas the invention of complex metal­ lurgy can, on present evidence, be shown to have hap­ pened in two, perhaps, three regions. l Two of these centers of innovation combined to form a single tradition, that of the central Andes, and it was this tradition which spread northward, eventually arriving in Mesoamerica. In the central Andes, metallurgy ftrst appears in the Initial period, ...

& Young (1959, 1960) showed that n-propylmercapturic acid was excreted by rats, rabbits, guinea pigs and mice to which 1-bromoor 1-iodopropane had been administered. Bray & James (1958) obtained evidence suggesting that 1-bromobutane, -pentane, -hexane, -heptane and -octane, and 1-nitro-ethane and -propane, formed mercapturic acids in the rabbit, and Barnes, James & Wood (1959) showed that a si...

The spatial and temporal stability of soil test values is important to the use of soil testing for nutrient management. A study was conducted to evaluate the spatial and temporal stability of soil test phosphorus (P). Five sites ranging in size fiom 9.1 to 10.8 acres were soil sampled in the same locations in a 60 X 60 ft. grid either three or four times over a two year period. Bray 1 -P values...

by Richard T. Lindsey, Ph.D. ad the incidence rates of adult obesity resting between 15 percent and 50 percent (Bray, 1976) and with 25 percent of American youth being obese, an important challenge presents itself for practitioners of health care. In sheer numbers these statistics represent approximately 34 million people (Van Itallie, 1985). Not only do the obese bear the brunt of social ridic...

1932, 25, 1343 (Sect. Odont., 39). 9 Bradley WH., Arch. Dis. Childhood, 1930, 29,359. 10 Glover JA, and Wilson J., Brit. M. J., 1932 (ii), 506 11 Cunningham Ruby L., Arch. Int. Med., 1931, 47, 513. 12 Ash WM., Reports to the Derbyshire Education Committee 1931-7. 13 Hewitt ES, and Geddie KB., Am. J. Hyg., 1932, 15, 1 Paterson D and Bray GW., Lancet, 1928 (ii), 1074. 14 Close HG Guy’s Hosp. Rep....