The application of an age-structured model to the north Aegean anchovy fishery: An evaluation of different management measures

Politikos, DV; Tzanetis, DE; Nikolopoulos, CV; Maravelias, CD

dc.contributor.author	Politikos, DV	en
dc.contributor.author	Tzanetis, DE	en
dc.contributor.author	Nikolopoulos, CV	en
dc.contributor.author	Maravelias, CD	en
dc.date.accessioned	2014-03-01T02:14:48Z
dc.date.available	2014-03-01T02:14:48Z
dc.date.issued	2012	en
dc.identifier.issn	00255564	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30120
dc.subject	Age structured model	en
dc.subject	Anchovy	en
dc.subject	Fisheries management	en
dc.subject	Fishing strategy	en
dc.subject	McKendrick-Von Foerster equation	en
dc.subject	Northern Aegean Sea	en
dc.subject.other	Aegean sea	en
dc.subject.other	Age structured model	en
dc.subject.other	Anchovy	en
dc.subject.other	Fisheries management	en
dc.subject.other	McKendrick-von Foerster equation	en
dc.subject.other	Biomass	en
dc.subject.other	Ecology	en
dc.subject.other	Mathematical models	en
dc.subject.other	Profitability	en
dc.subject.other	Fisheries	en
dc.subject.other	age structure	en
dc.subject.other	biomass	en
dc.subject.other	fishery management	en
dc.subject.other	fishing mortality	en
dc.subject.other	numerical model	en
dc.subject.other	population dynamics	en
dc.subject.other	spawning	en
dc.subject.other	anchovy	en
dc.subject.other	article	en
dc.subject.other	biomass production	en
dc.subject.other	fishery management	en
dc.subject.other	lethality	en
dc.subject.other	mathematical model	en
dc.subject.other	population dynamics	en
dc.subject.other	population structure	en
dc.subject.other	spawning	en
dc.subject.other	Age Factors	en
dc.subject.other	Animals	en
dc.subject.other	Conservation of Natural Resources	en
dc.subject.other	Fisheries	en
dc.subject.other	Fishes	en
dc.subject.other	Greece	en
dc.subject.other	Models, Biological	en
dc.subject.other	Numerical Analysis, Computer-Assisted	en
dc.subject.other	Population Dynamics	en
dc.subject.other	Aegean Sea	en
dc.subject.other	Mediterranean Sea	en
dc.subject.other	Engraulidae	en
dc.title	The application of an age-structured model to the north Aegean anchovy fishery: An evaluation of different management measures	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.mbs.2012.03.002	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.mbs.2012.03.002	en
heal.publicationDate	2012	en
heal.abstract	The objective of this paper is the integration of existing biological and fishery knowledge of anchovy into a unified modelling framework in order to advance our understanding of species' population dynamics under different fishing strategies. The model simulates the anchovy biomass by combining an age-specific growth equation and a continuous age-structured population model based on the McKendrick-Von Foerster equation. Model predictions were compared to the biomass estimates and annual catches during the period 2003-2008. The present work provided direct evidence for the significance of the prespawning period as a critical life period for the management of anchovy stock in the Aegean Sea. It was found that the introduction of additional management measures could increase the profits in the long run for the fishery. However, for these to become apparent they will require a minimum of four years. Results also indicated that the reduction of fishing mortality directed at the spawning stock (recruitment overfishing) and the selective harvesting of younger individuals may be a plausible means of increasing stock's total anchovy biomass. Finally, as a criterion of long-term population survival, we have considered the mathematical notation of persistence. The numerical criteria of persistence in the present model indicated that the anchovy population could be considered viable. © 2012 Elsevier Inc..	en
heal.journalName	Mathematical Biosciences	en
dc.identifier.doi	10.1016/j.mbs.2012.03.002	en
dc.identifier.volume	237	en
dc.identifier.issue	1-2	en
dc.identifier.spage	17	en
dc.identifier.epage	27	en