Download Migration: The Biology of Life on the Move by Hugh Dingle PDF

By Hugh Dingle

... i am a researcher whose box of research comprises animal stream and migration -- Hugh Dingle is among the superior scientists during this box of analysis, and this ebook is THE seminal paintings at the subject. I reference it on a regular basis.

Rather than simply describing the entire assorted examples of migration, Hugh makes an attempt to unify the sphere less than one complete theoretical framework. He succeeds magnificently, beginning with an specific operating defininiton of what migration is, then utilizing this to debate the body structure, mechanisms, and evolution of this habit. The e-book is stuffed with interesting examples from the clinical literature that in actual fact illustrate the issues he's attempting to make. If there are gaps within the tale, it's no fault of the writer -- there are various gaps in our wisdom. ...Hugh is enthusiastic about bugs, there's a sturdy cause of that. bugs make first-class try out topics for those reviews -- they practice remarkable migrations, they're effortless to accommodate, and straightforward to govern experimentally. accordingly, loads of migration study has concerned one form of insect or another.

The publication is articulate and hugely readable, even though I agree stable historical past within the organic sciences may help. it's not meant for the informal reader. I hugely suggest it (five stars is not enough), although, for a person who desires to quite delve into the topic.

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Extra resources for Migration: The Biology of Life on the Move

Example text

The three instances of migration described so far all take place by flight, but migratory journeys also take place in the oceans, freshwaters, and over land. Perhaps the best known of aquatic migrations are those of salmon, which take place between fresh and salt water (diadromy), in this case with breeding in freshwater Figure 3-3. Annual life cycle of the milkweed bug, Lygaeus equestris in Sweden. Migration to diapause sites occurs in August and September as indicated by the line for cumulative flight beginning in month VIII.

This should become more apparent as I discuss various examples and aspects of migration in the remainder of the book. With this modification to expand the life forms covered, the Kennedy definition has major advantages over all other definitions appearing in the migration literature. By focusing on the behavior itself, on what the organism is actually doing to move and not simply on the geographic coordinates of the movement, it is predictive, rather than merely descriptive. Implicit in the definition are tests for determining whether a particular individual is a migrant.

Fourth, distinct behaviors of leaving and arriving are characteristic of migrants. Most migrant birds, for example, become hyperphagic before departure and may increase food intake by as much as 40% above normal, with the excess stored as lipid fuel. This condition was recognized as long ago as 1928 by Groebbels and termed zugdisposition or "travel disposition" (Groebbels 1928; see also Berthold 1975; Rappole and Warner 1976). Phoretic mites actively seek out and attach themselves to an insect for transport and then release and resume foraging behaviors (inhibited during transport) after a period of travel (Binns 1982; Houck and O'Connor 1991).

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