Fisheries Statistics

Habitat- and sex-specific life history patterns of yellow tang Zebrasoma flavescens in Hawaii, USA

by Jeremy T. Claisse

Claisse JT, Kienzle M, Bushnell ME, Shafer DJ, Parrish JD (2009) Habitat- and sex-specific life history patterns of yellow tang Zebrasoma flavescens in Hawaii, USA. Mar Ecol Prog Ser 389:245-255

Impacts of a Hawaiian marine protected area network on the abundance and fishery sustainability of the yellow tang, Zebrasoma flavescens

by Jeremy T. Claisse

Williams ID, Walsh WJ, Claisse JT, Tissot BN, Stamoulis KA (2009) Impacts of a Hawaiian marine protected area network on the abundance and fishery sustainability of the yellow tang, Zebrasoma flavescens. Biol Conserv 142:1066-1073

Ensuring representative economic data: survey data-collection methods in France for implementing the Common Fisheries Policy

by Emmanuelle Quillérou

Since 2001, Ifremer has implemented an economic data collection programme (EDCP) within the Data Collection Framework... more Since 2001, Ifremer has implemented an economic data collection programme (EDCP) within the Data Collection Framework of the EU. It aims to obtain economic data from a sample of vessels representative of the entire French fishing fleet. This paper presents the strategies used for vessel sampling selection in the French EDCP and its implementation over several consecutive years. The approach is illustrated by the sampling plan for the fleet in the North Sea Channel Atlantic region. We show that the EDCP allows precise economic indicators such as gross revenue or fuel costs to be estimated for the whole fishing fleet, including small vessels (<10 m), and consequently, it facilitates sound scientific advice regarding the Common Fisheries Policy. The apparent underestimation of landings by small vessels in official statistics is highlighted.

The illusion of plenty: hyperstability masks collapses in two recreational fisheries that target fish spawning aggregations

by Jeremy T. Claisse

Erisman BE, Allen LG, Claisse JT, Pondella DJ, Miller EF, Murray JH, Walters C (2011) The illusion of plenty: hyperstability masks collapses in two recreational fisheries that target fish spawning aggregations. Canadian Journal of Fisheries and Aquatic Sciences 68: 1705-1716

Economies of Scale and Concentration in the Greek and the Norwegian Aquaculture Industry. An empirical Study.

by Konstantinos Vergos

The purpose of this study is to investigate whether there are economies of scale in the Greek and Norwegian fish farming industry, and to examine the structure of the sector

Keywords: Fisheries, industry structure, regulation, Government Expenditures and Health, Market Structure

To investigate economies of scale, we use the
Cobb-Douglas production function, while we examine the structure of... more To investigate economies of scale, we use the
Cobb-Douglas production function, while we examine the structure of the fish-farming by computing the HHI
indicator over different years. We find that the market concentration level is high in Greece in both relative, to
Norway, and in absolute terms. From the other part, Norway, the leader of the fish farming of Atlantic salmon
and Rainbow trout globally, suffers from economies of scale in the examined period. Given the fact that both
Greek and Norwegian production is targeting large markets in Europe (UK, France, Italy) both the findings in
Greece and Norway may be worrying signals, that large M&A activity may lead to decreasing competition
and increasing returns to scale in the industry, as previously happened in the food retail industry. Given the
important contribution of fish farming to poverty alleviation, food security and social well being, European
regulators should investigate whether it is optimal to exercise policies that enhance technology transfer and
limit further market concentration.