Kategoria BISAC: Nature >> Animals - Fish

Apart from being commercially and socially significant, anchovies and sardines populations occupy crucial positions in the oceans ecosystems. Low in the food chain, clupeoids tend towards abundance, as if their purpose in life was to be eaten and fuel the upper levels of marine trophic chains. The present book covers a broad spectrum of topics on the biology (sytematics, phylogeography, reproduction, feeding) and ecology (habitat characterization, recruitment variability) of anchovies and sardines. It also puts together important information on the state of their fisheries, exploitation,...

Fisheries genetics researchers will find invaluable the thirty-eight peer-reviewed contributions in this book, presented at the 20th Lowell Wakefield Fisheries Symposium "Genetics of Subpolar Fish and Invertebrates," held in May 2002 in Juneau, Alaska.

Looming over concerns of lost fisheries stocks and persistent erosion of genetic variability are predictions of global warming, which may further tax genetic resources. One consequence is an increased reliance on genetic applications to many aspects of fisheries management, aquaculture, and conservation.

The contributions in...

Comparative Evaluations of Innovative Fisheries Management begins with a look at four places outside the European Union known for innovative management: New Zealand, Nova Scotia, Alaska and Iceland. Then the focus shifts to the success criteria related to specific disciplines including biological and social robustness, economic efficiency and impacts on management costs. Hypotheses are tested using data capable of generating useful results. The main conclusions include a retrospective of how key concepts defined and represented the various perspectives, skills and backgrounds that...

Besides the erroneous assumption that tropical fisheries are open access, the cases demonstrate that pre-existing systems (1) are concerned with the community of fishers and ensuring community harmony and continuity; (2) involve flexible, multiple and overlapping rights adapted to changing needs and circumstances; (3) that fisheries are just one component of a community resource assemblage and depend on both the good management of linked upstream ecosystems and risk management to ensure balanced nutritional resources of the community; and (4) pre-existing systems are greatly affected by a...