Fishing about and about fishing

 

A chapter in a book to be published by the Bulgarian Academy of Sciences

 

INTRODUCTION

 

The adequacy and validity of the Western World fisheries science and the consequent fisheries management in the, so called, “developed countries” is critically discussed. The reliability of mathematical/statistical models of fish population dynamics supported by acoustic surveys, which generate single-species stock assessments, is inherently dependent on stable and comprehensive real-time field data. However, even if such data are available, the equilibrium assumptions, on which the fisheries management is based, might be misleading, although accepted by official science. Other misleading assumptions, pointed out by the chapter author, are that the natural mortality constant and the fishing mortality rates may serve as the only factors determining the fish stocks size fluctuations. Management, which is based on those assumptions, often does not pay sufficient attention to the human factor in fishing activities, while disregarding most if not all environmental, abiotic and biotic, natural and anthropogenic factors that do affect fluctuations of fish populations' size.

 

Currently a number of generations of western fisheries scientists have been trained in line with this paradigm, to which they stick due to mental and institutional inertia. However, since fisheries presents a dynamic process where fish, fisherman, and ever-changing environment interact, it is not surprising that the western fisheries management cannot be but deficient. In addition such canonical assumptions as: the larger is the spawning stock, the larger is the recruitment, single species catch management is the cure for all diseases, fishing must   be  size selective, and models can be still valid without input of environmental data, must be seriously questioned.

 

For over a century, scientists, independent of the institutional pressure and inertia have been notifying the real issues in fisheries ecology, publishing scientific reports, books and papers, trying to set a realistic and appropriate course for fish stock management, so far, however, with little success. Currently, only too many fishery-management scientists are spending most of their time in operating, analyzing, and discussing computer models in their efforts to circumvent insufficient information and large data flaws. They do it  by manipulating their models, while using mathematical/statistical exercises. Unfortunately this practice comes at the expense of sea-born research, on-board sampling, data collection, and analysis, and keeps the scientists away from seas, fish, and also from fishermen and their knowledge. 

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