Migratory birds modulate niche tradeoffs in rhythm with seasons and life history.

Movement is a key means by which animals cope with variable environments. As they move, animals construct individual niches composed of the environmental conditions they experience. Niche axes may vary over time and covary with one another as animals make tradeoffs between competing needs.

Geographical distribution and hosts of the cestode Paranoplocephala omphalodes (Hermann, 1783) Lühe, 1910 in Russia and adjacent territories.

Paranoplocephala omphalodes is a widespread parasite of voles. Low morphological variability within the genus Paranoplocephala has led to erroneous identification of P. omphalodes a wide range of definitive hosts.

Laparoscopic management of large hiatal hernia: mesh method with the use of ProGrip mesh versus standard crural repair.

Background: Primary repair of large hiatal hernia is associated with a high recurrence rate. The use of mesh can lead to a reduce of recurrence rate. Despite this reduction, the type of mesh used and the placement technique are controversial.

Scanning electron microscopy of the iridescent feather architectonics of the white throated needletail (Hirundapus caudacutus, Apodidae, Aves).

By means of SEM, it has been demonstrated that structural coloration of the needletail Hirundapus caudacutus depends on architectonics of iridescent feathers of the bird.

Critically endangered western gray whales migrate to the eastern North Pacific.

Western North Pacific gray whales (WGWs), once considered extinct, are critically endangered with unknown migratory routes and reproductive areas. We attached satellite-monitored tags to seven WGWs on their primary feeding ground off Sakhalin Island, Russia, three of which subsequently migrated to regions occupied by non-endangered eastern gray whales (EGWs). A female with the longest-lasting tag visited all three major EGW reproductive areas off Baja California, Mexico, before returning to Sakhalin Island the following spring.