BACKGROUND Quantifying changes in forest bird diversity is an essential task for developing effective conservation actions. When subtle changes in diversity accumulate over time, annual comparisons may offer an incomplete perspective of changes in diversity. In this case, progressive change, the comparison of changes in diversity from a baseline condition, may offer greater insight because chan...

Spatial variation in growth is a common feature of demersal fish populations which often exist as discrete adult sub-populations linked by a pelagic larval stage. However, it remains unclear whether variation in growth occurs at similar spatial scales for populations of highly migratory pelagic species, such as tuna. We examined spatial variation in growth of albacore Thunnus alalunga across 90...

This article analyzes the main objectives of the scientific voyage to circumnavigate the earth, undertaken by the United States from 1838 to 1842. Charting was one of the most important of the scientific and strategic goals of the exploratory voyage. The initiative for the undertaking was the search for exact positioning on the high seas after the establishment of the longitude system, when nau...

A companionship argument is used to give a constructive geometric proof of a key result concerning the knot homomorph problem: Given elements p and A in a group G, is there a knot K in S3 and a surjective representation p : n,(S3 K) + G, such that p(m) = y and p( [) = A, where m and I are the meridian and longitude of K. The result presented here is that if for some p that normally generates G,...

Résumé. Nous présentons une étude pour la prédiction des trajectoires de cyclones dans l’océan Atlantique Nord à partir de données issues d’images satellites. On y extrait des mesures de vitesses de vent, de vorticité, d’humidité (base JRA-25) et des mesures de latitude, de longitude et de vitesse de vent instantanée des cyclones toutes les 6 heures (base IBTrACS). Les modèles de référence à ce...

Hole U1309A: Latitude: 30° 10.1081' N, Longitude: 42° 07.1101' W, 1643 mbsl Hole U1309B: Latitude: 30° 10.1081' N, Longitude: 42° 07.1101' W, 1643 mbsl Hole U1309C: Latitude: 30° 10.1081' N, Longitude: 42° 07.1209' W, 1638 mbsl Hole U1309D: Latitude: 30° 10.1195' N, Longitude: 42° 07.1131' W, 1645 mbsl Hole U1309E: Latitude: 30° 10.1207' N, Longitude: 42° 07.1057' W, 1644 mbsl Hole U1309F: Lati...

The literature on vertical disparity is complicated by the fact that several different definitions of the term "vertical disparity" are in common use, often without a clear statement about which is intended or a widespread appreciation of the properties of the different definitions. Here, we examine two definitions of retinal vertical disparity: elevation-latitude and elevation-longitude dispar...

Newly hatched sea turtles exposed to artificially generated magnetic fields with parameters characteristic of two sites 3700 km apart, differing only in longitude, can distinguish the two apparent locations and orient appropriately.