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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 ...
- French, T D; Chambers, P A
- Canadian journal of fisheries and aquatic sciences 1997 v.54 no.10 pp. 2247-2254
- biomass; data collection; equations; macrophytes; models; rivers; summer; watersheds; British Columbia
- ... Approximately 50% of the Nechako River's flow was permanently diverted into another watershed in the early 1950s. Up to 50% of the remaining flow may be diverted in the future. To give insight as to how future and past flow reductions will/have affect(ed) macrophyte abundance, we first developed equations relating average summer channel speed to cross-sectional biomass and bottom cover from data c ...