Day-night differences in Cunene horse mackerel (Trachurus trecae) acoustic relative densities off Angola

ICES Journal of Marine Science

Volumn 67, Issue 5, 2010, Pages 1004-1009

  Vaz Velho, Filomena ^a   Barros, Pedro ^b,c   Axelsen, Bjørn Erik ^d  

^a Ilha de Luanda   (Angola)

^b UNIVERSITY OF ALGARVE   (Portugal)

^c FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS   (Italy)

^d INSTITUTE OF MARINE RESEARCH   (Norway)

Author keywords

Abundance estimates; Acoustics; Cunene horse mackerel; Diurnal behaviour; Vertical migration

Indexed keywords

ABUNDANCE ESTIMATION; ACOUSTIC SURVEY; AGGREGATION BEHAVIOR; BEHAVIORAL ECOLOGY; BIOACOUSTICS; DIURNAL VARIATION; PERCIFORM; SPATIAL DISTRIBUTION; VERTICAL MIGRATION;

ANGOLA;

EQUIDAE; TRACHURUS TRECAE;

EID: 77953645250     PISSN: 10543139     EISSN: 10959289     Source Type: Journal    
DOI: 10.1093/icesjms/fsq004     Document Type: Article

References (34)

1. Anon. 2003. Report on Survey Errors Workshop, Cape Town, South Africa, 4-7 December 2000. BENEFIT Secretariat, Swakopmund, Namibia. 45 pp.
2. Anon. 2004. Report on Survey Errors Workshop, Cape Town, South Africa, 14-15 December 2003. BENEFIT Secretariat, Swakopmund, Namibia. 31 pp.
3. Anon. 2007. Surveys of the pelagic resources, 7 July-20 August 2007. Unpublished report NORAD-FAO-UNDP PROJECT GLO/92/ 013. 67 pp. + Appendices.
4. Axelsen, B. E. 2007. Acoustic identification and abundance estimation of horse mackerel, jellyfish and mesozooplankton in the Benguela ecosystem. PhD thesis, University of Bergen. 40 pp. + Papers and Annex 115 pp.
5. Axelsen, B. E., Krakstad, J. O., and Bauleth-D'Almeida, G. 2004. Aggregation dynamics and behaviour of the Cape horse mackerel (Trachurus trachurus capensis) in the northern Benguela- implications for acoustic abundance estimation. In Namibia's Fisheries: Ecological, Economic and Social Aspects, pp. 135-164. Ed. by U. R. Sumaila, D. Boyer, M. D. Skogen, and S. I. Steinshamn. Eburon, Delft.
6. Axenrot, T., Didrikas, S. T., Danielsson, C., and Hansson, S. 2004. Diel pattern in pelagic behaviour and distribution observed from a stationary, bottom-mounted, and upward-facing transducer. ICES Journal of Marine Science, 61: 1100-1104.
7. Blaxter, J. H. S., and Batty, R. S. 1990. Swimbladder behaviour and target strength. Rapports et Procès-Verbaux des Réunions du Conseil International pour l'Exploration de la Mer, 189: 233-244.
8. Coetzee, J. C., Misund, O. A., and Oechslin, G. 2001. Variable spatial structure of schooling pelagic fish off Namibia: implication for acoustic surveys. South African Journal of Marine Science, 23: 99-109.
9. Duarte, C. 2001. Distribution and mixture of Cape and Cunene horse mackerel, Trachurus capensis and Trachurus trecae, in the Angola- Benguela front in relation to environmental and other factors. MSc thesis, University of Cape Town. 169 pp.
10. Foote, K. G. 1978. Effect of fish behaviour on echo energy: the need for measurements of orientation distributions. Journal du Conseil International pour l'Exploration de la Mer, 39: 193-201.
11. Foote, K. G. 1980. Importance of the swimbladder in acoustic scattering by fish: a composition of gadoid and mackerel target strengths. Journal of the Acoustical Society of America, 67: 2084-2089.
12. Foote, K. G. 1987. Fish target strengths for use in echo integrator surveys. Journal of the Acoustical Society of America, 82: 981-987.
13. Foote, K. G., Algen, A., and Nakken, O. 1986. Measurement of fish target strength with a split-beam echo sounder. Journal of the Acoustical Society of America, 80: 612-621.
14. Foote, K. G., and Nakken, O. 1978. Dorsal aspect target strength functions of six fishes at two ultrasonic frequencies. Fisken og Havet, Serie B, 3: 1-96.
15. Fréon, P., Gerlotto, J., and Misund, O. A. 1993a. Consequences of fish behaviour for stock assessment. ICES Marine Science Symposia, 196: 190-195.
16. Fréon, P., and Misund, O. A. 1999. Dynamics of Pelagic Fish Distribution and Behaviour: Effects on Fisheries and Stock Assessment. Fishing News Books, London. 348 pp.
17. Fréon, P., Soria, M., Mullon, C., and Gerlotto, F. 1993b. Diurnal variation in fish density estimates during acoustic surveys in relation to spatial distribution and avoidance reaction. Aquatic Living Resources, 6: 221-234.
18. Huse, I., and Ona, E. 1996. Tilt angle distribution and swimming speed of overwintering Norwegian spring spawning herring. ICES Journal of Marine Science, 53: 863-873.
19. Knudsen, H. P. 1990. The Bergen Echo Integrator: an introduction. Journal du Conseil International pour l'Exploration de la Mer, 47: 167-174.
20. MacLennan, D. N., Fernandes, P. G., and Dalen, J. 2002. A consistent approach to definitions and symbols in fisheries acoustics. ICES Journal of Marine Science, 59: 365-369.
21. MacLennan, D. N., and Simmonds, E. J. 1992. Fisheries Acoustics. Chapman and Hall, London. 325 pp.
22. Manly, B. F. J. 2006. Randomization, Bootstrap and Monte Carlo Methods in Biology, 3rd edn. Chapman and Hall, London. 480 pp.
23. Meeus, J. 1998. Astronomical Algorithms. Willmann-Bell, Richmond. 477 pp.
24. Nakken, O., and Olsen, K. 1977. Target strength measurements of fish. Rapports et Procès-Verbaux des Réunions du Conseil International pour l'Exploration de la Mer, 170: 52-69.
25. Olsen, K. 1990. Fish behaviour and acoustic sampling. Rapports et Procès-Verbaux des Réunions du Conseil International pour l'Exploration de la Mer, 189: 147-258.
26. Olsen, K., Angell, J., Pettersen, F., and Løvik, A. 1983. Observed fish reactions to a surveying vessel with special reference to herring, cod, capelin and polar cod. FAO Fisheries Report, 300: 131-138.
27. Ona, E. 2001. Herring tilt angles, measured through target tracking. Ed. by F. Funk, J. Blackburn, D. Hay, A. J. Paul, R. Stephenson, R. Toresen, and D. Witherell. University of Alaska Sea Grant, Fairbanks, AK. 800 pp.
28. Ona, E., and Mitson, R. B. 1996. Acoustic sampling and signal processing near the seabed: the deadzone revised. ICES Journal of Marine Science, 53: 677-690.
29. Pearre, S. 1997. Underwater acoustics in marine fisheries and fisheries research. Reviews in Fish Biology and Fisheries, 7: 1-34.
30. Pitcher, T. J. 1983. Heuristic definition of shoaling behaviour. Animal Behaviour, 21: 673-686.
31. Pitcher, T. J., and Parrish, J. K. 1993. Functions of schooling behaviour in teleosts. In The Behaviour of Teleost Fishes, 2nd edn, pp. 364-439. Ed. by T. J. Pitcher. Croom Helm, London.
32. Vabø, R. 1999. Measurements and correction models of behaviourally-induced biases in acoustic estimates of wintering herring (Clupea harengus L.). Doctor scientiarium thesis, University of Bergen. 161 pp.
33. Vaz Velho, F., Axelsen, B. E., Barros, P., and Bauleth-D'Almeida, G. 2006. Identification of acoustic targets off Angola using General Discriminant Analysis. African Journal of Marine Science, 28: 525-533.
34. Weston, D. C., and Andrew, H. W. 1990. Seasonal sonar observations of the diurnal shoaling times of fish. Journal of the Acoustical Society of America, 87: 1543-1546.