Current Ornithology by Jeremy M. V. Rayner (auth.), Richard F. Johnston (eds.)

By Jeremy M. V. Rayner (auth.), Richard F. Johnston (eds.)

Volume five of this sequence maintains its insurance of at present energetic re­ seek fields in ornithology. simply because an editor can by no means be a disin­ terested observer of his or her personal editorial efforts, any declare for su­ periority of this quantity isn't really with no clash of curiosity. nonetheless, quantity five has definite advantages that even a father or mother should still recognize, and that i locate the present chapters no longer simply well timed and authoritative yet compelling of their call for for a reader's cognizance. Wolfgang and Roswitha Wiltschko offer a perceptive assessment of magnetic orientation in birds, a section devoted to Fritz Merkel, the pioneer in stories of magnetic orientation. Sergei Kharitonov and Doug­ las Siegel-Causey are interested in the behavioral ecology of seabird coloniality, emphasizing their box studies within the USSR and the U.S.. Ted Miller examines the applying of stories of chook habit to comparative biology, pursuing the interface of habit and evolutionary biology adumbrated by means of Konrad Lorenz within the Thirties. Jeremy Raynor provides us a precis of the paintings over the last decade on poultry flight, which isn't, via turns, as advanced or so simple as we had previously believed. Carrol Henderson describes fresh increase­ ments in nongame poultry conservation, in line with his pioneering paintings within the kingdom of Minnesota. Alan Kamil discusses optimum experimental layout for examine in ornithology, a box within which experimental paintings is usually tough to pursue.

Show description

Read or Download Current Ornithology PDF

Similar nonfiction_8 books

Optimization and Chaos

This choice of essays brings jointly a few articles on dynamic optimization versions that show chaotic habit. Chapters three, four, five, 6, 7, and nine seemed in a Symposium on Chaotic Dynamical platforms in fiscal thought (Volume four, quantity five, 1994). additionally, Chapters 10,11, and 12 seemed within the magazine of financial The­ ory.

The Dynamic Structure of Cell Membranes

HERBERT FISCHER Max-Planck-Institut fur Immunbiologie, Freiburg-Zahringen With three Figures women and gents: On behalf of the organizers of the twenty second Mosbach Colloquium, Msrs. HOLZL-WALLACH, STOFFEL, WIEGANDT and myself, I bid you all a hearty welcome. We thanks thinking about coming and of course think specific appreciation for the presence of the invited audio system.

Cyst Nematodes

The cyst nematodes are an incredible staff of plant pathogens of financial value in lots of international locations in the course of the international. substantial yield losses were attributed to cyst nematodes attacking potatoes, sugar beet, soybean and cereals. as a result of protecting cyst that's shaped, which encloses the eggs, they pose designated difficulties of their keep an eye on and in addition in combating their distribution in soil from infested parts.

Additional resources for Current Ornithology

Sample text

Magpie ~~~~ ~.. ~ pigeon ~ swift •. lapwing blackbird , , sparrow t FIGURE 11. The diversity of wing and tail design in a range of flying birds drawn to scale, as seen from below with wings outstretched; scale bar 2 m. On the left wing of each bird the approximate positions of the humerus , ulna, and metacarpals are shown. From Herzog (1968) with permission of Gustav Fischer Verlag. 28 JEREMY M. V. 1 10 body mass (kg) FIGURE 12. 955). (A) Measurements for individual species. , hummingbirds (Trochilidae, Apodiformes); +, Passeriformes.

The same is also the case in bats (U. M. Norberg and Rayner, 1987). The scaling for hummingbirds (Apodidae) differs considerably from that for other flying birds (see also Greenewalt, 1962, 1975); the reasons for this remain poorly understood but are related to the extensive hovering of nectarivorous hummingbirds, to mechanical specializations in the wing, and to the mechanism of force generation (Rayner, 1979b). Owing to these mechanical differences, I do not discuss the group in detail and generally when referring to flying birds exclude hummingbirds.

Other gait parameters such as wingbeat amplitude are assumed to be independent of scale under dynamic similarity. This simple theory predicts variation of wingbeat frequency, flight speed, and mechanical flight power with size. 8 (Rayner, 1982); predictions, so also do the scalings of metabolic power. 1). 1); however, although the correlation is weak, the scaling index of measured flight speeds against body mass does not differ significantly from 1/6 (Rayner, unpublished results). As a method for predicting performance in an individual bird, scaling is unreliable and of limited validity, and these examples demonstrate the fallacy of isometric scaling; nonetheless, von Helmholtz's theory can provide a useful background for consideration of the diversity of avian wing form.

Download PDF sample

Rated 4.23 of 5 – based on 39 votes