This study investigated spatial-temporal variations of shear stress and bed load transport at three gravel bed river reaches of the Williams Fork River, Colorado. A two-dimensional flow model was used to compute spatial distributions of shear stress (τ) for four discharge levels between one third of bankfull (Qbf) and Qbf....
Frozen storage is an integral part of effective food distribution. In general, both food quality retention and storage costs will increase as storage temperatures decrease. In this paper, we develop a model for optimal temperature design for semi-perishable seafood inventory, and apply the model to Pacific Whiting surimi. General results...
It has been recently reported that the major canned fish found in international trade –tuna- was first canned in 1903 in southern California. This US-centric view regrettably omits the important foreign trade of canned fish products borne as far back as the late 1820s in Europe, birth place of this...
Recently, the number of leisure fishers has increased in Japan. Recreational anglers have caught larger numbers of fishes than commercial fishermen in some species. Formulating an appropriate management strategy that considers recreational and commercial sectors is important. Sockeye salmon (Oncorhynchus nerka) has been caught in Lake Toya, Hokkaido, Japan, by...
High-level hygiene management for foods is highly required in Japan nowadays. In general, there are 5 stages in the flow of marine products; fishing, unloading, market, processing and distribution. Therefore it is important to take care the hygiene management at each stage of them. In this report, the most advanced...
This paper focuses on a coastal fishery in Biscay Bay where a variety of fishing vessels operate. To prevent overfishing in this very coastal and very sensitive area, a lot of regulations apply, linked to a licensing system implemented since the begininning of the 80s by fishermen's representatives. A survey...
This paper compares two methods for collecting data concerning professional fishing fleets economic performance : use of preexisting bookkeeping databases and ad hoc field surveys of fishers. Each method has its pros and cons and, for practical reasons, it may be necessary to make use of both. Such a feature...
Traditionally, European fisherwomen were often involved in fisheries sector by selling fish. Today, their contribution is more diversified with very limited legal recognition: management of fishing enterprise, maintenance of gears. Fisherwomen continue to sell fish because it is often a good way to get a better price. Confronted with economic...
In Namibia, the linefish sector is in principle exploited by two sectors: recreational anglers and commercial rightholders. Recreation angling, in the broad Namibian context, is made up of two categories of fishing activities; that which is exerted for the purpose of pleasure or as a sporting activity (recreational anglers), and...
The Fishermen Guilds in Spain (Cofradias) have around one thousand year tradition. They play a central role in the control of the fishing rights in special in the context of coastal fisheries. The paper examines the mechanisms to establish property rights, the quality of these rights and the cost and...