We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Does increased information about reproductive potential result in better prediction of recruitment?
- Authors
Morgan, M. Joanne; Perez-Rodriguez, Alfonso; Saborido-Rey, Fran; Marshall, C. Tara
- Abstract
The relationship between stock size and recruitment is an essential element in the understanding of the productivity of a population. However, predicting the number of recruits produced by a population has proven to be a difficult challenge. This may in part be a result of poor estimation of reproductive potential (RP). We determined if including increased information on reproductive biology in indices of RP results in better predictions of recruitment. We investigated some of the conditions that lead to better (or worse) recruitment prediction when more biologically complex indices of RP are used. Data from four populations in the Northwest Atlantic were examined: southern Grand Bank (NAFO Division 3NO) cod (), Flemish Cap (NAFO Division 3M) cod, Newfoundland (NAFO Division 3LNO) American plaice (), and Greenland halibut () (NAFO Subarea 2 + Division 3KLMNO). Stock-recruit models paired with complex indices of RP gave a better estimate of recruitment in slightly more than half of the tests conducted. When there were larger trends in the reproductive biology (maturity at age, sex ratio and egg production), more complex indices of RP were more likely to provide a better estimate of recruitment.
- Subjects
GRAND Banks of Newfoundland; FISH reproduction; FISH populations; RECRUITMENT (Population biology); ESTIMATION theory
- Publication
Canadian Journal of Fisheries & Aquatic Sciences, 2011, Vol 68, Issue 8, p1361
- ISSN
0706-652X
- Publication type
Article
- DOI
10.1139/f2011-049