Following a brief historical review of the emergence of fisheries for forage fish that are primarily destined for reduction, and their competition with fisheries for human consumption, an account is given of landing trends in various parts of the world, and catch maps are provided for the 1970s and 2000s which allow spatial and temporal comparisons. A brief account is also given of the changing...

A study of European hake Merluccius merluccius gill net selectivity was undertaken off the Algarve (Southern Portugal), between 1999 and 2001. Four nominal mesh sizes (70, 80, 90 and 100 mm) were used in fishing trials and the ‘share each length class catch total’ (SELECT) method was used to fit gill net selectivity curves. Hake were caught in the same size range by all mesh sizes, between 17 a...

The debate on whether artificial reefs produce new fish or simply attract existing fish biomass continues due to the difficulty in distinguishing these processes, and there remains considerable doubt as to whether artificial reefs are a harmful form of habitat modification. The harm typically associated with attraction is that fish will be easier to harvest due to the existing biomass aggregati...

Technological solutions used in the course of artificial reproduction chum salmon (Oncorhynchus keta) conditions private farming Magadan region are considered.
 The potential effectiveness fish-breeding measures carried out Takhtoyam fish hatchery to preserve stocks and increase volume its catch rivers Shelikhov Bay is shown.

Catch-and-release angling is popular in many parts of the world and plays an increasingly important role in management of recreational fisheries. Although the magnitude of catch-and-release mortality is well documented for many species, potential sublethal effects have been little studied. An experiment was conducted to assess directly the effects of catch-and-release angling on growth of large...

There is an increasing recognition that the influence of extreme climate events (ECE) can be more significant in structuring ecosystem dynamics than the gradual effects of climate change. Still, our understanding of the effects of climate extremes on ecosystem services such as marine fisheries lags behind those of effects of gradual change. The significance of ECEs depends on the severity of th...

The problem the fisheries economists face is that of determining and recommending the fishing intensity that will maximize the economic value to the consuming societies and also maximize the producers' surplus at a level of production in perpetuity. In this paper the optimal control theoretic approach is employed to theoretically answer this problem within the framework of a one country-one fis...

Populations of tunas, billfishes and pelagic sharks are fished at or over capacity in many regions of the world. They are captured by directed commercial and recreational fisheries (the latter of which often promote catch and release) or as incidental catch or bycatch in commercial fisheries. Population assessments of pelagic fishes typically incorporate catch-per-unit-effort time-series data f...

Tuna purse seine fishery is a commercial and industrial fishery in the Iranian waters of Oman Sea. An observer programme was conducted to identify the by-catch composition of the tuna purse seine fishery in the Iranian waters of the Oman Sea. Investigations were carried out on board of purse seiner vessel “named Parsian Shila” between September and October 2015. The by-catch was composed of 17 ...

The mercury content of Oregon groundfish was determined. The mercury content of rex sole. Glyptocephaills :,achirlls; Dover sole, MicroSlo/llllS pacijicII.\'; petrale sole, Eopse((a jorda/li; English sole, Parophrys \,etllills; sand sole, Psettiehthys lI1e!al1ostietlls; starry flounder Pla{ie"t"ys stellatlls; canary rockfish, Sebas{es pil1l1iRer; flag rockfish, Sebastes rllbri\,il1c{lIs; yellow...