Potential effects of maternal contribution on egg and larva population dynamics of striped bass: Integrated individual-based model and directed field sampling
- Maryland Univ., Solomons, MD (United States). Chesapeake Biological Lab.
- Oak Ridge National Lab., TN (United States)
We have used a bioenergetically-driven, individual-based model (IBM) of striped bass as a framework for synthesizing available information on population biology and quantifying, in a relative sense, factors that potentially affect year class success. The IBM has been configured to simulate environmental conditions experienced by several striped bass populations; i.e., in the Potomac River, MD; in Hudson River, NY; in the Santee-Cooper River System, SC, and; in the San Joaquin-Sacramento River System CA. These sites represent extremes in the geographic distribution and thus, environmental variability of striped bass spawning. At each location, data describing the physio-chemical and biological characteristics of the spawning population and nursery area are being collected and synthesized by means of a prioritized, directed field sampling program that is organized by the individual-based recruitment model. Here, we employ the striped bass IBM configured for the Potomac River, MD from spawning into the larval period to evaluate the potential for maternal contribution to affect larva survival and growth. Model simulations in which the size distribution and spawning day of females are altered indicate that larva survival is enhanced (3.3-fold increase) when a high fraction of females in the spawning population are large. Larva stage duration also is less ({bar X} = 18.4 d and 22.2 d) when large and small females, respectively, are mothers in simulations. Although inconclusive, these preliminary results for Potomac River striped bass suggest that the effects of female size, timing of spawning nad maternal contribution on recruitment dynamics potentially are important and illustrate our approach to the study of recruitment in striped bass. We hope to use the model, field collections and management alternatives that vary from site to site, in an iterative manner for some time to come. 54 refs., 4 figs., 1 tab.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE; EPRI; USDOE, Washington, DC (United States); Electric Power Research Inst., Palo Alto, CA (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5078098
- Report Number(s):
- CONF-9110245-1; ON: DE92001971; CNN: RP2932-2
- Resource Relation:
- Conference: International Council for the Exploration of the Sea (ICES) mini-symposium on models of recruitment relevant to the formulation of research strategies, La Rochelle (France), 10-16 Oct 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
MORTALITY
PARAMETRIC ANALYSIS
POPULATION DYNAMICS
COMPUTERIZED SIMULATION
MATHEMATICAL MODELS
RESEARCH PROGRAMS
STRIPED BASS
AGE DEPENDENCE
ANIMAL GROWTH
BIOLOGICAL VARIABILITY
BREEDING
EGGS
ITERATIVE METHODS
LARVAE
LIFE CYCLE
SAMPLING
SURVIVAL CURVES
TEMPERATURE DEPENDENCE
ANADROMOUS FISHES
ANIMALS
AQUATIC ORGANISMS
FISHES
GROWTH
NUCLEAR FUEL CONVERSION
SIMULATION
VERTEBRATES
550400* - Genetics
550100 - Behavioral Biology
990200 - Mathematics & Computers