Animal Migrations. A synthesis by E.J. Milner-Gulland, John M. Fryxell, Anthony R.E. Sinclair PDF

By E.J. Milner-Gulland, John M. Fryxell, Anthony R.E. Sinclair

Regardless of the wealth of ordinary old learn carried out on migration over many years, there's nonetheless a dearth of hypothesis-driven experiences that absolutely combine conception and empirical analyses to appreciate the reasons and outcomes of migration, and a taxonomic bias in the direction of birds in a lot migration learn. This publication takes a comparative, built-in view of animal migration, linking evolution with ecology and administration, thought with empirical examine, and embracing the entire significant migratory taxa (including human pastoralists). The scope extends past the objective organism to think about the ecosystem-level dynamics of migration. The emphasis is on fascinating new examine avenues which are now establishing up, even if because of advances in our knowing of migration as a organic phenomenon or throughout the availability of a variety of new applied sciences.

Broad topics that emerge contain integrating migration into the large spectrum of flow habit, the necessity for a comparative and cross-taxonomic procedure that considers migration at a number temporal and spatial scales, and exam of the most important roles of source uncertainty and spatial heterogeneity in riding migratory habit. The ebook identifies the potential of new instruments to revolutionize the research of migration, together with satellite-tracking expertise, genomics, and modeling - all of that are associated with expanding computing energy. we're now at the verge of a step forward in migration examine, that's the most important given the a number of threats that face the conservation of migration as a phenomenon, together with weather switch.

Show description

Read Online or Download Animal Migrations. A synthesis PDF

Best zoology books

Modern Text Book of Zoology Vertebrates by R. L. Kotpal PDF

The e-book has been written to cater for the durable wishes of Indian scholars because it is sort of most unlikely for them to selected any unmarried textbook on vertebrates. it's meant essentially as a textbook for the Honours and the Undergraduate scholars of the Indian Universities. even if, the scholars of upper periods, the applicants getting ready for varied competetive examinations, and the topic academics can also locate it worthwhile as a convenient advisor for reference.

Download PDF by James R. Turner: Frogs of Australia: An introduction to their classification,

This ebook introduces the Australian frog fauna and features a portray of, and distribution maps for every of the 213 species and five sub-species of Australian frogs presently known in 2003, in most cases according to Dr. H. G. Coggers taxonomy. greater than a hundred and ten new species of Australian frogs were came upon and defined on account that 1960.

Download e-book for kindle: Ecology, behaviour and conservation of the charrs, genus by Pierre Magnan, Céline Audet, Hélène Glémet, Michel Legault,

Salvelinus species are some of the most completely studied teams of fishes. Many purposes clarify this severe curiosity in charr biology. Charrs have a Holarctic distribution encompassing many Asian, North American, and eu international locations and occupy different marine and freshwater environments. additionally, the present distribution of charr contains parts that have been without delay motivated via weather and topographic swap linked to the various Pleistocene glaciations.

Additional resources for Animal Migrations. A synthesis

Sample text

1999). 2 (a) A range equation for a flying animal, showing how the optimal departure fuel load (fopt) is obtained according to Equation 3. In the case of a barrier at distance Dbar ahead of the animal, the minimum requirement is a fuel load fmin. t0 and f0 are search/settling time and energy costs, respectively, and k is the daily fuel accumulation rate. (b) Illustration of the effect of different fuel accumulation rates k1 and k2 (k2 < k1) on the optimal departure fuel load f1 and f2, and the optimal departure fuel load associated with minimization of cost of transport (f).

What our model results suggest is that the combination of seasonality and migration can permit species coexistence, despite their competitive equivalence within patches. It has long been appreciated that geographic variation in survival rates outside the breeding season can contribute importantly to the selective advantage of migration (Lundberg 1988). Lack (1968) pointed out that temporal variation in survival rates could lead to balanced long-term fitness of migrants vs. residents. Similar arguments underlie von Haartman’s (1968) state-dependent evolutionary arguments for the evolution of avian migration; resident birds obtain compensatory reproductive advantage balancing the higher over-wintering costs relative to migrants.

69. 31 (where Neq = 1 + sA/rA). 5 in the non-growing season. Fit- ness over the year is the product of these two numbers, 1, so the population in habitat A is in demographic equilibrium. 28 (where Neq = 1 + sB/rB). 7. Good and bad seasons are synchronized across space. 4, so it would be selected and increase when rare (Fig. 1). In this example, one would expect to see the evolution of at least some migration into and out of the poorer habitat. Paradoxically, however, some individuals should leave just as conditions begin to improve locally in habitat A.

Download PDF sample

Animal Migrations. A synthesis by E.J. Milner-Gulland, John M. Fryxell, Anthony R.E. Sinclair

by Anthony

Rated 4.81 of 5 – based on 19 votes

Related posts