1975 - 01 Ash Content of Macrophytes from Chautauqua

Ash Content of Macrophytes from Chautauqua

Food choice in Siganus fuscescens: influence of macrophyte nutrient content and availability

Using multiple-choice feeding experiments, the selection of six species of macrophytes by the herbivorous rabbitfish Siganus fuscescens was examined. The rabbitfish showed distinct food choice in the laboratory; however, selection of macrophytes by S. fuscescens was not related to their absolute nutrient content (nitrogen, carbon, energy and ash free dry mass). Nutrient assimilation estimates s...

Horse metacarpal bone: age, ash content, cortical area and failure stress interrelationships.

In a study of interrelationships among the parameters of ash content, failure stress and cortical area of the horse metacarpal bone, bones from 41 horses aged 1 day to 33 years were analyzed. Calcium, phosphorus and magnesium in bone ash at all ages ranged from 35 to 39, 14 to 17 and .32 to .85%, respectively; range of calcium to phosphorus ratios was 2.1 to 2.6. There was no correlation betwee...

Preliminary Beneficiation and Washability Studies on Ghouzlou's Low-Ash Coal Sample

In the present research work, a low-ash coal, from Ghouzlou deposit in Iran, with an average ash content of 12% was subjected to some beneficiation experiments such as heavy media separation and flotation. Sieve analysis showed that 62.3% of the coal sample with the size of +2 mm had around 7.3% ash contents. Also, heavy media tests carried out on five size fractions revealed that by setting th...

Investigation on competitors and predators of herbivorous aquatic Lepidoptera (Acentria ephemerella) on submersed macrophytes in a large prealpine lake

Submersed macrophytes offer a large colonization area for many macroinvertebrates. Numerous studies investigated the interaction between plant species, growth and leaf form and the abundance and species composition of invertebrates (e.g. SOSZKA 1975, KORNIJÓW & KAIRESALO 1992). Grazers and detrivores assist the plants by removing epiphyton and allowing more light to reach the photosynthetic tis...