ecological evaluation of the cumberland basin [bay of fundy] ecosystem model
TRANSCRIPT
OLR (1988) 35 (6) E. Biological Oceanography 559
continuously collects data on movements of up to 14 tagged lobsters simultaneously. The method and its problems are discussed and suggestions made for improvement. Susceptibility to wave action of the aerials and the main communication cable that brings the signals to shore suggests that electro- magnetic tracking is feasible only in calm and shallow environments. CSIRO Div. of Fish. Res., P.O. Box 20, North Beach, WA 6020, Australia.
88:3502 Radford, P.J. and P. Ruardij, 1987. The validation of
ecosystem models of turbid estuaries. Continent. Shelf Res., 7(11-12): 1483-1487.
The ecosystem model of the Bristol Channel and Severn Estuary (GEMBASE) was fitted to 3 years of survey data, and subsequently validated against a further 5 years of monitoring data. A control chart technique demonstrates that the model is an ade- quate representation of the estuarine carbon cycle, although the precision of model estimates reduces with increasing trophic level. A model of the Eros Estuary has been adapted to simulate the Severn Estuary, and the impact of introducing a notional tidal power scheme assessed. Results were compared to those obtained using GEMBASE in the Severn. Broad predictions from both models are in agree- ment, although some detail is at variance, implying fundamental ecological assumptions of the models are compatible. IMER, Prospect Place, PLI 3DH, Devon, UK.
88:3503 Zadorina, V.M., 1987. Choice of trap exposure time
for collection of invertebrate drift samples. Hydrobiol. J. (a translation of Gidrobiol. Zh.), 23(2):82-86. Polar Res. Inst. of Mar. Fish. and Oceanogr., Ministry of Fish., Acad. of Sci., Murmansk, USSR.
crustacean fisheries exist off South African coasts: trap-fisheries off the western and southern coasts and a demersal trawl fishery off the eastern coast. Rock lobsters, langoustines, penaeid prawns, caridean shrimp, and red crabs constitute the primary crustacean catch. Growth, distribution patterns, and catch-based stock assessments are discussed. Sea Fish. Res. Inst., Private Bag X2, Rogge Bay 8012, Cape Town, South Africa. (gsb)
88:3505 Gordon, D.C. Jr., P.D. Keizer, Peter Schwinghamer
and G.R. Daborn, 1987. Ecological evaluation of the Cumberland Basin [Bay of FundYl ecosystem model. Continent. Shelf R es., 7(11-12):1477-1482.
A holistic 1-D model of the Cumberland Basin has three each compartments, boundaries and interact- ing submodels. Twenty-eight biological state vari- ables represent broad functional groups of organ- isms and non-living organic carbon pools. Individual pelagic state variables give annual simulations in general agreement with available calibration data. Major problems remain with some benthic state variables, especially subtidal ones. The model per- forms well and output at the ecosystem level agrees with field observations. Annual community respi- ration exceeds phytoplankton net production 2-5- fold, suggesting the importance of carbon imported from surrounding marshes and sea. Annual com- munity respiration and microalgal net production are closely balanced in intertidal sediments; respi- ration in subtidal sediments is dependent upon sedimented carbon. Results affirm that the Cum- berland Basin is a heterotrophic ecosystem with low primary production and requires imported organic carbon to support production and respiration of higher trophic levels. Bedford Inst. of Oceanogr., P.O. Box 1006, Dartmouth, NS B2Y 4A2, Canada.
FA0. Area studies, surveys (baselines, ecol- ogy, etc.)
88:3504 Crawford, R.J.M., L.V. Shannon and D.E. Pollock,
1987. The Benguela ecosystem. Part IV. The major fish and invertebrate resources. Oceanogr. mar. Biol. a. Rev., 25:353-505.
The major fisheries resources of the southeast Atlantic associated with the Benguela Current system are reviewed. In addition to the large commercial catches of finfish (the Peruvian anchoveta fishery is the largest in the world), two
E50. General biology, ecology, bioge- ography, etc.
88:3506 Bradner, H. et al., 1987. Bioluminescence profile in
the deep Pacific Ocean. Deep-Sea Res., 34(11A): 1831-1840.
A calibrated instrument with a threshold sensitivity of 400 photons cm 2 s L was used to measure the vertical profile of bioluminescence at a depth of 4300 m at a station near Hawaii. The measured light is dominated by flashes over a very faint ambient background. The median light levels follow an exponential scaling law below 2000 m and decrease