Experimental studies of fish cutting waste—scales and skin were carried out, their general biochemical composition was studied, a high content collagen established, elastin noted, which accounted for 76–86% the protein mass. Processes hydrolysis secondary raw materials have been developed: scales skin. Technological schemes developed influence conditions thermal, enzymatic, enzymatic-thermal, e...

Herring and mackerel are two of the most important pillars Scottish fisheries. In recent years, global warming has caused a gradual rise in ocean temperatures. order to survive reproduce, herring populations will migrate. This have huge impact on Scotland’s Therefore, we need predict relocation fish stocks advance, make timely adjustments fishing range, minimize loss industry. this article, sub...

We modeled temporal trends in polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), and dichlorodiphenyltrichloroethane and its metabolites (DDTs) in two indicator fish species representing benthic and pelagic habitats in Puget Sound, Washington, USA. English sole (Parophrys vetulus, benthic) index sites and larger-scale Pacific herring (Clupea pallasii, pelagic) foraging ar...

Patterns of coexistence among competing species exhibiting size- and food-dependent growth remain largely unexplored. Here we studied mechanisms behind coexistence and shifts in competitive dominance in a size-structured fish guild, representing sprat and herring stocks in the Baltic Sea, using a physiologically structured model of competing populations. The influence of degree of resource over...

Mercury (Hg), aside from having high toxicity, is characterized by its ability to biomagnify in the marine trophic chain. This is an important problem especially in estuaries, or in the coastal zone, particularly near the mouths of large rivers. This study was conducted in the years 2001-2011, in the coastal zone of the Baltic Sea near to the mouth of the River Vistula, which is the second bigg...

A bow-mounted surface pushnet and an obliquely towed plankton net were compared to evaluate gear efficiency and effectiveness in collecting larval fishes under daytime and nighttime conditions. The diadromous species targeted were striped bass Morone saxatilis, white perch, Morone americana, and river herring Alosa sp. We sampled the lower Roanoke River, North Carolina, from March through June ...

Atlantic herring, Clupea harengus, increase their swimming speed during low O2 (hypoxia) and it has been hypothesised that the behavioural response is modulated by the degree of ‘‘respiratory distress’’ (i.e. a rise in anaerobic metabolism and severe physiological stress). To test directly whether a deviation in physiological homeostasis is associated with any change in behavioural activity, we...

(5) How the establishment of the experimental population may contribute to recovery of the UC spring-run Chinook salmon ESU as a whole; (6) The extent to which the experimental population would be affected by current or future Federal, state, or private actions within or adjacent to the experimental population area; (7) Current programs within the experimental population area that protect fish ...

The United States Fish and Wildlife Service (USFWS) developed guidelines for the composition and role of endangered species recovery implementation teams, but few teams have been established and their success has not been evaluated. Using the recovery program of the red wolf (Canis rufus) as a model, we describe the genesis, function, and success of the Red Wolf Recovery Implementation Team (RW...

A requisite for reliable food web models and ecosystem-based management in regions such as the California Current is the availability of diet information on key predators. In upwelling ecosystems, much of the lower trophic level energy may be transferred through a relatively small set of very abundant pelagic forage fish taxa, such as anchovies, sardines, smelts, and herring. In addition the pe...