Selected Papers Presented at the Workshop on Biological Reference Points: Rome, 20-21 April 2004
Food & Agriculture Org., 2006 - Business & Economics - 80 pages
This workshop stressed that the concept of reference points (RPs) needs to be closely connected to the management objective of concerned fisheries, taking into account various parameters such as maximum sustainable yield, economic and social benchmark and environment concern. Participants stressed the need to define different RPs for each dimension of management or to identify a single RP aimed at ensuring the sustainability of the system, thereby no longer limited to biological aspects. A review of possible approaches to setting RPs and indicators for Black Sea fisheries emphasized the dynamic nature of recent ecosystem changes. The traffic light approach was illustrated as a means of following dynamic changes and gaining a broad perspective on events at the ecosystem level. The workshop outlined the main RPs obtained by applying the bio-economic optimization models of effort and effort-catch as derived from the theory of population dynamics.
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75th percentile abundance index Adriatic Sea analysis anchovy anchovy and sardine annual values approach arithmetic mean Azov Sea bio-economic models biological reference point Black Sea fisheries Caddy catches Cingolani collapse CPUE age decline Deepwater rose shrimp demersal economic ecosystem ecosystem change Emsy environment environmental estimated European hake exploitation rate Figure 9 fisheries management fishing activity fishing effort fishing mortality rates fishing system fleet Garibaldi geometric mean GFCM ICCAT increase indicators and reference level of effort leydei Ligurian Sea limit reference points longline LRPs mackerel management rule MBAL mean weighted Mediterranean merluccius Merluccius merluccius migratory pelagics monitoring obtained optimal Orsi Relini overfishing Palandri Parapenaeus longirostris period phytoplankton pool of Medits population predator Prodanov recovery recruitment index Santojanni sardine segment small pelagics spawners spawning biomass stock assessment sustainable development swordfish threshold traffic light trend trophic TRPs Workshop