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- Hammond, T
- Canadian journal of fisheries and aquatic sciences 1997 v.54 no.10 pp. 2323-2333
- Bayesian theory; Gadus morhua; acoustics; biomass; fish; models; species diversity; surveys
- ... Knowledge of the target strength (TS) distribution of the fish being surveyed is necessary for accurate acoustic biomass estimates. Although dual-beam and split-beam transducers can measure TS in situ, these measurements are usually misleading because fish with higher TS are detected more readily, measurements are coming from several fish species, and measurements are made on the total echo from s ...
- LePage, C; Cury, P
- Canadian journal of fisheries and aquatic sciences 1997 v.54 no.10 pp. 2235-2246
- environmental factors; extinction; fish; models; philopatry; population viability; spawning
- ... A spatially explicit individual-based model (IBM) helps to explain how two reproductive strategies, described as obstinate and opportunist, may be acting at the population level. Factors such as the spatial structure and the dynamics of the environment, the shape of the reproductive function, and spawning season duration are considered. Five simulations are presented to explore the importance of t ...