Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
BULLETIN OF MARINE SCIENCE, 83(1): 163179, 2008 163Bulletin of Marine Science
 

Summary: BULLETIN OF MARINE SCIENCE, 83(1): 163179, 2008
163Bulletin of Marine Science
2008 Rosenstiel School of Marine and Atmospheric Science
of the University of Miami
MOTE SYMPOSIUM INVITED PAPER
THE IMPORTANCE OF INCORPORATING PROTOGYNOUS
SEX CHANGE INTO STOCK ASSESSMENTS
Suzanne H. Alonzo, Teresa Ish, Meisha Key,
Alec D. MacCall, and Marc Mangel
ABSTRACT
Although it is generally recognized that management strategies should consider
life-history variation, little is known about how various reproductive strategies af-
fect stock dynamics. Protogynous (female-to-male) sex change is a relatively com-
mon life history pattern in fishes for which standard assessment methods do not
exist. We developed a stock-assessment model for a commercially and recreation-
ally exploited sex-changing species [California sheephead, Semicossyphus pulcher
(Ayres, 1854)] to determine how ignoring or including sex change affects the as-
sessment of the stock. First, we demonstrated that ignoring sex change leads to an
overestimate of spawning biomass and very different conclusions regarding the ef-
fect of exploitation on the spawning potential ratio (SPR). Furthermore, we found

  

Source: Alonzo, Suzanne H. - Department of Ecology and Evolutionary Biology, Yale University

 

Collections: Environmental Sciences and Ecology; Biology and Medicine