North American birds that feed on flying insects are experiencing steep population declines, particularly long-distance migratory populations in the northern breeding range. We determine, for the first time, the level of migratory connectivity across the range of a songbird using direct tracking of individuals, and test whether declining northern populations have higher exposure to agricultural...

The Checua site within Nemocón in the eastern Andean Region of Colombia has produced evidence of huntergatherer activities from 9500-8700 cal yr BP. The aim of this work was to analyze genetically the Checua group according to mitochondrial DNA HVR-I sequence data. Following strict criteria of authenticity for studies of ancient DNA, extracted DNA was amplified and sequenced for each of the hum...

I describe three new species of the diverse microhylid frog genus Oreophryne from Papua New Guinea. Two of these occur in two isolated mountain ranges along the northern coast of Papua New Guinea; the third is from Rossel Island in the very southeasternmost part of the country. All three are the first Oreophryne known from these areas to have a cartilaginous connection between the procoracoid a...

Anthropogenic activities frequently result in both rapidly changing environments and translocation of species from their native ranges (i.e., biological invasions). Empirical studies suggest that many factors associated with these changes can lead to complex genetic patterns, particularly among invasive populations. However, genetic complexities and factors responsible for them remain uncharact...

Background: The caprellid fauna from different localities along the Mexican Pacific coast: Sinaloa (3), Nayarit (15), Jalisco (9) and Colima (1) are presented herein. Methods: A total of 1,093 specimens associated with diverse substrates (octocorals, hydroids, algae, coral rubble and sponge) were recorded. Results: Eight species in four genera were identified: Aciconula acanthosoma Chess 1989; ...

A new endemic species of Volutidae, Lyria (Lyria) ogasawarana sp. nov. is described from Chichijima Island, Ogasawara Islands, Japan. This new species is similar to the other Pacific Lyria: L. (Lyria) cassidula cassidula (Reeve, 1849), L. (Lyria) deliciosa (Montrousier, 1859), L. (Lyria) pattersonia (Perry, 1811) and L. (Lyria) insignata (Iredale, 1940). These different populations of closely r...

SYNOPSIS. Porpoising is the popular name for the high-speed surface piercing motion of dolphins and other species, in which long, ballistic jumps are alternated with sections of swimming close to the surface. The first analysis of this behavior (Au and Weihs, 1980) showed that above a certain ‘‘crossover’’ speed this behavior is energetically advantageous, as the reduction in drag due to moveme...

High-frequency (HF) surface wave radars provide a unique capability to detect targets far beyond the conventional microwave radar coverage but also could contribute to the development and improvement of Tsunami Early Warning Systems. The HF radar system WERA is an oceanographic radar placed at the coast and providing simultaneous wide area measurements of ocean surface current fields and sea st...