Abstract:
Samples were obtained with two pairs of black and white nets towed simultaneously at varying light conditions in the Weddell-Scotia confluence region. The statistical analysis (ANOVA, Regression and Kruskal-Wallis test) of the log transformed counts of Euphausia superba calyptopes larvae (CI, CII and CIII) shows that the significant difference between the white and black nets found in daytime are not present in darkness. A negative regression coefficient was detected between the difference in catches and sun's height, pointing to a light dependent avoidance reaction. These results demonstrate that the day/night differences in observed densities of krill larvae are due to net avoidance rather than to vertical migration, a result confirmed by hydroacoustical observations; and that the habitat of these stages is restricted at all times to the upper layers of the ocean.
Registro:
Documento: |
Artículo
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Título: | Diel variation in catches of Euphausia superba Dana 1854 early larvae: Vertical migration or avoidance reaction? |
Autor: | Marschoff, E.R.; Calcagno, J.A.; Amieiro, P. |
Filiación: | Instituto Antártico Argentino, Cerrito 1248, 1010 Buenos Aires, Argentina Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Cdad. Universitaria, Pab II, 1428 Buenos Aires, Argentina
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Palabras clave: | Distribution; Euphausia superba; Net avoidance; Vertical migration; avoidance reaction; larva; temporal variation; trawling; zooplankton; article; ecology; environment; larva; nonhuman; shrimp; statistical analysis; Southern Ocean; Euphausia superba; Euphausiacea |
Año: | 1998
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Volumen: | 228
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Número: | 1
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Página de inicio: | 107
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Página de fin: | 115
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DOI: |
http://dx.doi.org/10.1016/S0022-0981(98)00012-4 |
Título revista: | Journal of Experimental Marine Biology and Ecology
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Título revista abreviado: | J. Exp. Mar. Biol. Ecol.
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ISSN: | 00220981
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CODEN: | JEMBA
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00220981_v228_n1_p107_Marschoff |
Referencias:
- Brinton, E., Antezana, T., Structure of swarming and dispersed populations of krill (Euphausia superba) in Scotia Sea and South Shetland waters during jan/march 1981, determined on bongonets (1984) J Crustacean Biol., 4 (1), pp. 45-46
- Draper, N.R., Smith, H., (1966) Applied Regression Analysis, , John Wiley and sons Inc. New York
- Fraser, F.C., On the development and distribution of the young stages of krill (Euphausia superba) (1936) Discov. Rep., 14, pp. 3-192
- Hempel, I., Euphausiid larvae in the Scotia Sea and adjacent waters in summer 1977/78 (1981) Meeresforschung, 29, pp. 53-59
- Makarov, R., Menshenina, L., Solyankin, Y.V., Euphausiid larvae in the eastern zone of the Weddell gyre (1992) Oceanology, 32 (2), pp. 186-190
- Marr, J.W.S., The natural history and geography of the antarctic krill (Euphausia superba Dana) (1962) Discov. Rep., 32, pp. 33-464
- Marschoff, E.R., Profile analysis of Euphausia superba larvae vertical distribution in Scotia Sea, related to time factor (1985) Polar Biol., 5, pp. 35-41
- Marschoff, E.R., Diaz, G., Schloss, I., (1989) An Experimental Approach to the Analysis of Zooplankton Escape Reactions and Patchiness, , Document WG-CEMP-89/18. Commission for the Conservation of Antarctic Marine Living Resources, Hobart, Australia
- Sokal, R., Rohlf, J., (1981) Biometry, 2nd Ed., , W. H. Freeman and Company, New York
Citas:
---------- APA ----------
Marschoff, E.R., Calcagno, J.A. & Amieiro, P.
(1998)
. Diel variation in catches of Euphausia superba Dana 1854 early larvae: Vertical migration or avoidance reaction?. Journal of Experimental Marine Biology and Ecology, 228(1), 107-115.
http://dx.doi.org/10.1016/S0022-0981(98)00012-4---------- CHICAGO ----------
Marschoff, E.R., Calcagno, J.A., Amieiro, P.
"Diel variation in catches of Euphausia superba Dana 1854 early larvae: Vertical migration or avoidance reaction?"
. Journal of Experimental Marine Biology and Ecology 228, no. 1
(1998) : 107-115.
http://dx.doi.org/10.1016/S0022-0981(98)00012-4---------- MLA ----------
Marschoff, E.R., Calcagno, J.A., Amieiro, P.
"Diel variation in catches of Euphausia superba Dana 1854 early larvae: Vertical migration or avoidance reaction?"
. Journal of Experimental Marine Biology and Ecology, vol. 228, no. 1, 1998, pp. 107-115.
http://dx.doi.org/10.1016/S0022-0981(98)00012-4---------- VANCOUVER ----------
Marschoff, E.R., Calcagno, J.A., Amieiro, P. Diel variation in catches of Euphausia superba Dana 1854 early larvae: Vertical migration or avoidance reaction?. J. Exp. Mar. Biol. Ecol. 1998;228(1):107-115.
http://dx.doi.org/10.1016/S0022-0981(98)00012-4