Pacific herring Clupea pallasi immunoglobulin is an IgM-like molecule comprised of heavy and light chains with molecular weights of 79 and 25 to 27 kD, respectively. Purified immunoglobulin was used to generate highly specific polyclonal antibodies for development of a sandwich ELISA. The ELISA was used to quantify total plasma IgM in 602 Pacific herring captured in Prince William Sound and Sit...

The analysis of lipid class and fatty acid (FA) composition in juvenile herrring and sandlance demonstrates a high degree of localized variation in the availability of energy that may be related to the abundance of specific prey. Herring and sandlance juveniles were sampled from several locations around Prince William Sound during a two week period in late July, 1997. Analysis of their lipid cl...

High resolution electron micrographs of herring sperm protamine (clupeine) Y-I provide sufficient detail to constrain the folding of the known amino-acid sequence of the protein into a unique three-dimensional configuration. The structure consists of a loose helix of turns of various sizes held together at one edge, spread apart along the other. This form appears to represent the shape of sever...

Changes in swimbladder morphology in an Atlantic herring Clupea harengus with pressure were examined by magnetic resonance imaging of a dead fish in a purpose-built pressure chamber. Swimbladder volume changed with pressure according to Boyle's Law, but compression in the lateral aspect was greater than in the dorsal aspect. This uneven compression has a reduced effect on acoustic backscatterin...

The reintroduction of the gray wolf into the Northern Rocky Mountains has created many difficult management issues; ranchers fear for their livestock, hunters worry about game populations, ecologists and biologists support the reintroduction, and resource management agencies are caught in the middle. To date (2000), the one hundred plus wolves in the Yellowstone National Park area and approxima...

Importance of fish species in the benthal ichthyocoenoses (up to depths 2000 m) is discussed for Russian waters Far-Eastern Seas and adjacent North-West Pacific on data bottom trawl surveys conducted by Fish. Res. Inst. (TINRO) 1977–2010. The inverse Simpson index (or polydominance index) was chosen as a measure dominance; Sorensen-Chekanovsky similarity used comparative analysis dominance stru...

Microdeletion syndromes are caused by chromosomal deletions of less than 5 megabases which can be detected by fluorescence in situ hybridization (FISH). We evaluated the most commonly detected microdeletions for the period from June 01, 2008 to June 01, 2015 in the Federation of Bosnia and Herzegovina, including DiGeorge, Prader-Willi/Angelman, Wolf-Hirschhorn, and Williams syndromes. We report...

Fish and fishery products are considered to be one of the most nutrient-rich dietary products. The nutritional value fish depends on its freshness. greatest role in spoilage is played by microbial decomposition. Smoking methods preservation based action temperature penetration into tissue preservative substances produced burning wood. Almost all microorganisms except some pathogenic bacteria de...

The effect of progressive hypoxia on the structure and dynamics of herring (Clupea harengus) schools in laboratory conditions was investigated. The length, width and depth of schools of about 20 individuals were measured from video recordings to test the hypothesis that during hypoxia fish schools change their shape and volume. School shape (calculated as the ratios of length/depth, width/depth...

Conventional surplus production models indicate that destruction of fish populations by overfishing is difficult, if not impossible, but catastrophic declines in abundance of exploited populations are common. Surplus production models also do not predict large continuing fluctuations in yield, but large fluctuations in yield are common. Conventional surplus production models assume that fisheri...