By M. A. Ali (auth.), M. A. Ali (eds.)
A first-class piece of labor, I guarantee you, and a merry. -Now, strong Peter Quince, name forth your actors by way of the scroll. -Masters, unfold yourselves. A Midsummer Night's Dream. Act 1, Sc. 2 This quantity is the result of a NATO complicated examine Institute held in August 1979 at Bishop's collage, Lennoxville, Quebec, Canada. approximately one hundred thirty members from all of the nations of the aJiiance in addition to India and Japan attended this occasion which lasted weeks. Seventeen of those contributors were invited to give experiences of selected themes, often of their forte. This booklet is constituted ordinarily of those shows, that have been ready as chapters. furthermore, six of the members, whose seminars have been discovered to counterpoint the most chapters, have been coopted via the invited lectures/authors to supply extra chapters. even though a lecture used to be given on electrical fields, a bankruptcy in this subject is sadly absent as a result of loss of coaching time. One could say that Environmental body structure of Fishes as a self-discipline originated in Canada. Having been concerned as a instructor and employee during this box given that 19 fifty four, it used to be yet usual that i used to be tempted to organise an ASI and get a quantity out at the topic. i used to be inspired by way of discussions with colleagues and the attractiveness at the a part of a number of eminent colleagues to wait the ASI, convey lectures and write chapters.
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3b. Distribution of volumes of air and tissues in a lung of Lepldosiren (500 gms) based upon morphometric study. (from Hughes & Weibel, 1976). 2. Model The model which tends to pecome accepted in studies of this kind is based upon the Fick equation: V0 = KAt. P 0 It and at the outset it is 2 2 important to appreciate some of the limitations attached to the components of this relationship. a) Oxygen uptake ("Vo 2) In all animals but especially fish the oxygen consumption varies markedly in relation to activity (Fry, 1957).
Where the material is sectioned at random a rectilinear grid is appropriate, but in studies with such oriented structures it is possible to ensure a fairly uniform plane of sectioning and with such material a more randomising grid such as the Merz is used. By means of these grids and point and intersection counting, it is possible to estimate the relative surfaces and relative volumes within a structure which are respectively proportional to the intersection and point counts. With air-breathing organs the problem of area measurement is much more difficult, but for some simple sac-like structures it is possible to approximate to a cylinder and thence by determining areas and surfaces for sections chosen at measured distances along the cylinder, estimates can be made for the total volume (Fig.
Board Can. 30: 717-723. F. (1974). Metabollc cold adaptation of polar fish: fact or artefact? Physiol. Zool. 47: 137-152. F. (1977). Constancy of arterial blood pH during CO-induced hypoxia in the rainbow trout. Can J. Zool. 55: 1010-1013. F. R. (1975). ). J. Exp. Bioi. 63: 537-549. Holeton, G. F. and Randall, D. J. (1967 a). Changes in blood pressure in the rainbow trout during hypoxia. J. Exp. Bioi. 46: 297-305. F. J. (1967b). The effect of hypoxia upon the partial pressure of gases in the blood and water afferent and efferent to the gills of rainbow trout.