Publisher : Scientific Editor. Fish. Bull.
Place of publication :
Publication year : 2005
Thematic : Marine Protected Areas
Language : English
Note
"No-take marine reserves (areas closed to fishing) are now often established with an objective of sustaining or enhancing fisheries (Gell and Roberts, 2003). Reserves could achieve such objectives by eventually becoming net exporters of adult biomass, defined as “spillover,†and by providing net larval export, known as the “recruitment effect†(Russ, 2002). Fisheries will probably benefit from spillover in a minor way only. Theoretical studies have indicated that potential fishery yield (yield per recruit) from spillover would be insignificant, if any yield at all, except when stock abundance outside
reserves is very low due to high fishing mortality (Polacheck, 1990; Russ et al., 1992; DeMartini, 1993). Thus, potential gains from spillover are predicted to be only moderate. There seems to be general agreement
that the more important fishery enhancement effect of reserves would be due to net larval export (Carr and Reed, 1993; Russ, 2002). However, the establishment of reserves, particularly
in developing countries, requires strong support from local stakeholders,
especially fishermen (Russ and Alcala, 1996; Galal et al., 2002). There is a concern that, in some cases, support for reserves may be difficult to obtain on the pretext of enhanced fisheries through increased recruitment
(Russ and Alcala, 1996). Net larval export may seem less convincing
to fishermen because of the broad spatial scale (tens to hundreds of kilometers)
at which it will probably occur (Russ and Alcala, 1996; Russ, 2002). Yields from spillover, although probably
small, may play a critical role in convincing fishermen to support establishment and maintenance of reserves (Russ and Alcala, 1996). For some fishermen, adult fish “spillingoverâ€
from reserves, especially in the case of larger fish, will appear to be a more direct and tangible benefit than larvae recruiting to fishing grounds from distant reserves. Thus, spillover may have a substantial positive psychological
effect on the attitudes of fishermen toward reserves."
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Encoded by : Mae Belen Llanza
