Exploitation dynamics of fish stocks

Details Exploitation dynamics of fish stocks Exploitation dynamics of fish stocks

2006-01-31

arxiv.org/abs/q-bio/0601050v1

Ecological Informatics 1 (2006) 87-99

Biology

Quantitative Biology

Populations and Evolution

27 pages, 19 figures

Scientific paper

10.1016/j.ecoinf.2005.10.002

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 function of country landings with an exponent of value 0.15; (ii) the average number of fishers in a country scales to the 0.7 power of country landings. I show how these socio-ecological patterns may be related, yielding a scaling relation between these exponents. The predicted scaling relation implies that the width of the annual per capita growth-rate distribution scales to the 0.2 power of country landings, i.e. annual fluctuations in per capita landed catches increase with increased per capita catches in highly producing countries. Beside the scaling behavior, I report that fluctuations in the annual domestic landings have increased in the last 30 years, while the mean of the annual growth rate declined significantly after 1972.

Affiliated with

Also associated with

No associations

Rating

Exploitation dynamics of fish stocks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Exploitation dynamics of fish stocks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exploitation dynamics of fish stocks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-354020