 |
STUDIES AND REVIEWS |
No. 83 |
|
GENERAL FISHERIES COMMISSION FOR THE MEDITERRANEAN SELECTED PAPERS PRESENTED AT THE
WORKSHOP ON BIOLOGICAL REFERENCE POINTS by |
||
|
FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS |
||
|
Download Full PDF version |
||
|
The designations employed and the presentation of material in this information product do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations concerning the legal or development status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. |
ISBN 978-92-5-105622-6
ISSN 1020-9549
All rights reserved. Reproduction and dissemination of material in this information product for educational or other non-commercial purposes are authorized without any prior written permission from the copyright holders provided the source is fully acknowledged. Reproduction of material in this information product for resale or other commercial purposes is prohibited without written permission of the copyright holders. Applications for such permission should be addressed to the Chief, Publishing Management Service, Information Division, FAO, Viale delle Terme di Caracalla, 00100 Rome, Italy or by e-mail to [email protected]
|
Lembo, G. (ed.) ABSTRACT The 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. For the Mediterranean Sea, it was recommended to adopt a multicriteria approach based on bio-economic optimization models which, by introducing a number of constraints, would allow the definition of the actual state of the system as well as specific management targets. The use of some indicators derived from bottom trawl surveys carried out in the Adriatic Sea highlighted the potential suitability of selected indicators of their estimators. In the case of large pelagic species, it was confirmed that time series of both longline catch per unit effort and recruitment indexes can be considered as RP for these species. The use of a biological RP based on exploitation rate threshold was appraised for the stocks of anchovy and sardine in the central and northern Adriatic Sea and the workshop pointed out that it could be used to prevent stock collapse along with the minimum biological acceptable level based on spawning stock biomass. |
© FAO 2006
The potential use of indicators, reference points and the traffic
light convention
for managing Black Sea fisheries (by J.F. Caddy)
Reference points: a bio-economic model based approach
(by P. Accadia, V. Placenti,
M. Spagnolo)
On the suitability of some indicators from trawl surveys data.
Mediterranean
geographical sub-area No. 18
(by N. Ungaro, L. Ceriola, C.A. Marano, K. Osmani,
P. Mannini)
Looking for reference points in the Mediterranean swordfish
fishery: the case study
of the Ligurian Sea
(by G. Palandri, F. Garibaldi, C. Cima, L. Lanteri, M. Relini,
L. Orsi Relini)
Use of an exploitation rate threshold in the management of
anchovy and sardine
stocks in the Adriatic Sea
(by A. Santojanni, N. Cingolani, E. Arneri, A. Belardinelli,
G. Giannetti,
S. Colella, F. Donato)
- 1,399 Kb