Size-selective harvesting is assumed to alter life histories of exploited fish populations, thereby negatively affecting population productivity, recovery, and yield. However, demonstrating that fisheries-induced phenotypic changes in the wild are at least partly genetically determined has proved notoriously difficult. Moreover, the population-level consequences of fisheries-induced evolution a...

Where a fish stock straddles or migrates between country A’s exclusive economic zone (EEZ) and country B’s EEZ, or the high seas, vesting ownership rights in the stock with A does not ensure efficient harvesting of the stock. This problem arises in the case of migratory tuna stocks in the Western and Central Pacific Ocean (WCPO). Four species of tuna reside for only part of the year in the EEZs...

Using Basin Area Stream Survey (BASS) data from the United States Forest Service, we evaluated how timber harvesting influenced patterns of variation in physical stream features and regional fish and macroinvertebrate assemblages. Data were collected for three years (1990-1992) from six hydrologically variable streams in the Ouachita Mountains, Arkansas, USA that were paired by management regim...

Aquaculture has been a fast-growing industry because of significant increases in demand for fish and seafood throughout the world. Its economic importance is increasing economically. Aquaculture -also known as fish or shellfish farming -refers to the breeding, rearing, and harvesting of plants and animals in all types of water environments including ponds, rivers, lakes, and the ocean. Research...

To avoid marketing fish with environment-related off-flavors, fish must be screened for flavor quality before harvesting. Quantitative chemical analysis is inadequate for flavor quality control because of time constraints, costs involved, and the limited number of odorous compounds that can be detected with available methods. Sensory analysis (taste-testing), which treats trained “tasters” as a...

the poor performance of fishery subsector is most clearly evidenced by low adoption of fishery production technologies by farmers. the purpose of this research was analyzing influence of socio-economic factors on the adoption of fish production technologies by community-based farmers in cross river state, nigeria. a multistage random sampling technique was used in selecting 60 community-based f...

Introduction 2 Benchmarks, targets and fisheries ownership 2 Tradeoffs between economic and conservation benefits 3 Harvesting profits vs. fisheries employment 3 B MEY and the Western and Central Pacific tuna fisheries 4 Including harvesting and processing/retail sectors in B MEY 6 Incorporating harvesting profit and processing margins 6 Incorporating consumer surplus 8 Conclusions 9 Abstract T...

This paper studies fishery strategies in lakes, seas, and shallow rivers subject to agricultural industrial pollution. The flowing pollutants are modeled by a nonlinear differential equation general manner. logistic growth model for the fish population is modified cover pollution impact on rate. We start presenting stability analysis of dynamical system discern different types evolution accordi...

The importance of large breeding individuals for maintaining the health of marine fish and invertebrate populations has long been recognized. Unfortunately, decades of human harvesting that preferentially remove larger individuals have led to drastic reductions in body sizes of many of these species. Such size-selective harvesting is particularly worrisome for sequentially hermaphroditic specie...