LATEST ARTICLES

pacific sleeper shark
Information suggests that Pacific sleeper shark abundance is increasing. Pacific sleeper shark data was analyzed from fishery independent longline surveys in the Gulf of Alaska and the Bering Sea to determine the trend in abundance and whether any change was statistically significant. Relative population numbers of Pacific sleeper sharks captured in the NOAA Fisheries domestic sablefish longline surveys increased...

Predation

predatory hawk flying
Predators can impact ecosystems through the process of 'top-down' control, at times resulting in changes in species composition, changes in species diversity, and regime shifts. Top predators can also help stabilize ecosystems by keeping under control the effects of more abundant smaller predators. Accordingly, understanding predators is essential to understanding how ecosystems function. The Conservation Science Institute's Ocean Initiative's...
spiny dogfish near ocean floor bed
As their name suggests, spiny dogfish sharks (Squalus acanthias) have sharp spines in front of each dorsal fin. Their bodies are dark gray above and white below, often with white spotting on the sides. They are marketed as "rock shark", "rock cod" or "rock salmon" and are often eaten in Europe and used for English fish and chips. This...
brown bear and cub in green field
As large carnivores, Alaska brown bears range over great expanses of land, sometimes as much as 150 square miles for a single bear. In addition, brown bears depend upon such land features and associated animals and plants as alpine, slopes, sedge meadows, salmon streams, and old growth forests. These areas satisfy seasonal needs for feeding, winter denning, raising cubs,...
two men holding bald eagle
Bald eagles (Haliaeetus leucocephalus) are a member of the Accipitridae family, which also includes hawks, kites, and old-world vultures. Scientists loosely divide eagles into four groups based on their physical characteristics and behavior. The bald eagle is a sea or fish eagle. The adults have a blackish-brown back and breast; a white head, neck, and tail; and yellow feet and...