Masu salmon, Oncorhynchus masou masou, is one of the most valuable fishery species that has been introduced to China, though to date no studies on the genetic diversity and genetic relationship among hatchery populations has been performed with molecular markers. We undertook such a study and sampled 120 individuals from three hatchery stocks and analyzed 20 microsatellite loci. All loci were p...

Whereas many studies in finance have examined and established a strong link between stock returns and information, the physical mechanics of this link have been relatively unexplored. With the advent of stock message boards, it has become feasible to look more closely at the group process by which information impacts prices and vice versa. This paper utilizes a large universe of messages posted...

The only available data set on the catches of global fisheries are the official landings reported annually by the Food and Agriculture Organization of the United Nations (FAO). Attempts to detect and interpret trends in these data have been criticized as being both technically and conceptually flawed. Here, we explore and refute these claims. We show explicitly that trends in catch data are not...

In a recent study, Schulenburg and Ross (2001) proposed the LCS for short-term stock forecast. Studley and Bull (2007) proposed the extended classifier system (XCS) agent to model different traders by supplying different input information. Announcement made byMorgan Stanley Capital Investment (MSCI) regarding the additions, removals, and even the weights of the component stocks in its country i...

Stocks with similar financial ratio values across years have similar price movements. We investigate this hypothesis by clustering groups of stocks that exhibit homogeneous financial ratio values across years, and then study their price movements. We propose using Cross-Graph Quasi-Biclique (CGQB) subgraphs to cluster stocks, as they can define the three dimensional (3D) subspaces of financial ...

In equilibrium, active investing must be compensated with returns from gathering costly information about stock values (e.g., Grossman and Stiglitz, 1980). In return, active investors serve to promote price discovery in stocks. However, substantial trading is required by active, informed investors, who may prefer to trade in the same stocks as passive, uninformed investors to hide their intenti...

contrarian and momentum investing strategies are two techniques which are used in stock markets to enhance portfolio return. contrarian investing strategy states that stocks which had better performances in the past should be sold and stocks that had poor performances should be bought. in practice, this strategy is used for a package of stocks and for portfolio formation. the main objective of ...

Continuing the previous work on growth stocks, we propose a diffusion model for growth stocks. Since growth stocks tend to have low or even negative earnings and high volatility, it is a great challenge to derive a meaningful mathematical model within the traditional valuation framework. The diffusion model not only has economic interpretations for its parameters, but also leads to some interes...

NEXT PAGE t:> the fishery. These parents must mature, spawn, and fertilize eggs which hatch to larvae, only a very small fraction of whIch eventually survive and become fully formed young fish (recruits). Generally the females of most fish species produce several thousands of eggs, sometimes even several millions as in the case of some commercially exploited species in temperate waters. To a ce...

I address the question of the fluctuations in fishery landings. Using the fishery statistics time-series collected by the Food and Agriculture Organization of the United Nations since the early 1950s, I here analyze fishing activities and find two scaling features of capture fisheries production: (i) the standard deviation of growth rate of the domestically landed catches decays as a power-law ...