The stomach contents of 68 Atlantic bluefin tuna (Thunnus thynnus) landed in Port Hood and Canso, Nova Scotia, in 2010, were analyzed to characterize the diet of bluefin tuna at the two locations. Of the sampled fish, 54 stomachs had contents. Pelagic schooling fish such as herring (Clupea harengus) and mackerel (Scomber scombrus) dominated the diets in both regions. However, a number of rare s...

Despite the importance of recruitment for population dynamics and assessing stock status, limited information exists on relative influence various ecosystem demographic factors marine fishes. We develop a statistical framework to identify influencing fishes facilitate improved predictions recruitment. demonstrate approach by examining southern Gulf St. Lawrence spring- fall-spawning Atlantic he...

Overfishing has dramatically depleted sharks and other large predatory fishes worldwide except for a few remote and/or well-protected areas. The islands of Darwin and Wolf in the far north of the Galapagos Marine Reserve (GMR) are known for their large shark abundance, making them a global scuba diving and conservation hotspot. Here we report quantitative estimates of fish abundance at Darwin a...

There have been numerous reports of humpback whales and other marine predators deploying bubbles during foraging activities. However, the effects of bubbles on schooling prey organisms remain poorly understood. We conducted a series of laboratory experiments to gain insight into the effect of bubbles on the Pacific herring, Clupra harengus pallasi, a principal prey species of the humpback whale...

We, the U.S. Fish and Wildlife Service (Service), revise the regulations for the nonessential experimental population of the Mexican wolf (Canis lupus baileyi) under section 10(j) of the Endangered Species Act of 1973, as amended. This action is being taken in coordination with our final rule in this Federal Register to list the Mexican wolf as an endangered subspecies. The regulatory revisions...

Anadromous blueback herring Alosa aestivalis are declining throughout much of their range, and fishery closures in some systems have failed to produce population recovery. A potential contributing factor is increased predation pressure from sympatric striped bass Morone saxatilis. We integrated data on the predator–prey interaction between striped bass and blueback herring during vernal migrati...

In 1997, a total of 47 fish fairs were organised in Finland. Åbo not only was the usual autumn fair held, but also arranged spring, too early (because ice) for people from archipelago to be able come into town by means their own boats. The times and places over year are given Fish Fair Calendar which is published Fiskeritidskrift för Finland (Finnish Fishing Journal). Seven called herring fairs...

Habitat stratification by abiotic and biotic factors initiates divergence of populations and leads to ecological speciation. In contrast to fully marine waters, the Baltic Sea is stratified by a salinity gradient that strongly affects fish physiology, distribution, diversity and virulence of important marine pathogens. Animals thus face the challenge to simultaneously adapt to the concurrent sa...

The rapid decrease of several stocks of Pacific herring, Clupea pallasi, in Puget Sound, Washington, has led to concerns about the effects of industrial and nonpoint source contamination on the embryo and larval stages of this and related forage fish species. To address these concerns, the state of Washington and several industries have funded efforts to develop embryo and larval bioassay proto...

Abstract Sustainable fishery practices require accurate predictions of fish recruitment—the abundance a new year class entering fishery. A key driver recruitment is the impact predator-prey dynamics experienced during early life stages has on their survival at later stages, as in Match-Mismatch Hypothesis (MMH). MMH states that predator depends match (or mismatch) between timing feeding and pre...