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Spawning and Recruitment Patterns of Tropical Marine Fish Stock

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830
Published: 
Tuesday, March 1, 1988
U.S. Agency for International Development
There is a paucity of available knowledge regarding fundamental aspects of tropical fish stock demographics and dynamics. The global objective of this research was to develop quantitative techniques and heuristics designed to facilitate optimal benefits acquisition from TFS resources. This paper tests the hypothesis that the life history strategies of tropical fish stocks, particularly with respect to spawning and recruitment patterns, vary from their temperate and boreal counterparts. This paper systematically evaluates the TFS to achieve a better understanding of the way the system works, and determine how it can be effectively analyzed. Thus, the bounds of what can be learned about complex systems are explored. Most tropical fish stocks of economic importance are thought to spawn, recruit and grow continuously. Continuous demographics contrast sharply with the seasonal life history dogma for fish stocks dwelling in temperate oceans. Continuous rates satisfy more of the theoretical arguments under which the FATs were developed (vis a vis continuous distributions and continuous mathematics) and are of far greater interest to the mathematically inclined, but they make traditional methodologies of dubious validity under such dichotomous conditions. Thus, this paper is concerned with the potential for understanding variations in recruitment of fish populations related to seasonally oscillating, but continuously-breeding tropical marine fish stocks. The reason being that preferences between policies may be quite different when variations in cohort strengths, either random or directional, are taken into account versus policies based on constant parameterization.
Theme(s) & Sub-theme(s): 
Aquaculture
Resource type: 
Topical Report
Resource Scale: 
Global

Related resources

User's Guide to CORECS -- Continuous Recruitment Simulation Model
Abundance/Density Equations for Age - Structured Multicohort Populations: Mcon (Multiple Cohort N-Dimensional Model)
Tropical Fishery System Model: Corecs - Continuous Recruitment Simulation
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