In addition to loss of grazing land, agricultural expansion has also blocked livestock migratory routes between dry and wet season pastures, and between the herds and their daily watering points (Sulieman 2013; UNEP 2007).
It is well documented through the use of satellite tagging research in the Pacific Ocean that mature female sharks undergo a two-year migratory pattern between what is presumed a single mating site and separate nursery and pupping grounds.
And if there's a big gap, then we'd assume that a migratory flow between the two cities would occur until the marginal resident is once again indifferent.
In spite of being hyper-saline, and growing saltier all the time, the sea provides habitat to some four hundred and thirty species of birds, some of them endangered, and is one of the last significant wetlands remaining on the migratory path between Alaska and Central America.
Sindhudurg, for example, lies along one such migratory corridor between the forests of Maharashtra and a tiger reserve in Karnataka. .
The Azores are one of the world's foremost places for spotting these giants of the deep because of the islands' relative isolation and their position on the whale migratory route between America and Europe.
By combining the discovery with other neoceratopsian fossil records, researchers believe the ancestors of Aquilops americanus may have originated from Asia, supporting theories of a late Early Cretaceous (~113-105 million years ago) "intercontinental migratory event" between Asia and North America, as well as further migratory events later in the Cretaceous.
In fact, the migratory balance between Mexico and the United States is now negative: more people are returning to Mexico than emigrating to the US.
Stable isotopes of hydrogen, oxygen, carbon, nitrogen, and sulphur can establish avian migratory connectivity between wintering sites and breeding grounds.
The erection of fences that interrupt traditional migratory routes between wet and dry-season ranges have resulted in mass death events when the animals become cut off from water sources and the areas of better grazing they are seeking during droughts.
Yet, there is a much greater variability of migratory paths between populations.
