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Abstract:

Euphausiid larvae were collected in the Weddell Scotia Confluence region in summer 2011, in the West Antarctic Peninsula and Scotia Sea in 2012, and in the South Orkneys Shelf in 2014. From 2011 to 2014 the larval stages geographic distribution and the distribution of water masses were consistent with published information. The densities observed were compared between the cruises and with the 1981 and 1995 values by means of a kernel estimate of absolute and relative densities at a fixed grid of points. The values of Thysanoessa macrura were higher in 2011 and 2012 and those of Euphausia superba were lower than those observed in 1981 and 1995. Euphausia frigida did not show significant variations in absolute density but their relative values were higher than those of E. superba. No significant variations were observed in absolute values between 1981 and 1995. The opposite pattern was found in 2014, with significantly higher densities of E. superba than those of T. macrura. No single factor could be identified to explain these variations in density, suggesting the existence of complex mechanisms coupling the reproductive biology with oceanographic phenomena. Their description will require ample spatial and temporal monitoring rather than locally detailed observations. © 2018 Elsevier B.V. and NIPR

Registro:

Documento: Artículo
Título:Variability of euphausiid larvae densities during the 2011, 2012, and 2014 summer seasons in the Atlantic sector of the Antarctic
Autor:Rombolá, E.F.; Franzosi, C.A.; Tosonotto, G.V.; Alder, V.A.; Marschoff, E.R.
Filiación:Instituto Antártico Argentino, Dirección Nacional del Antártico, 25 de Mayo 1143, San Martín, 1650, Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas, Godoy Cruz 2290, Buenos Aires, C1425FQB, Argentina
Departamento de Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Intendente Güiraldes 2160, Buenos Aires, C1428EGA, Argentina
Palabras clave:Antarctic Peninsula; Geographical distribution; Krill larvae; South Orkneys MPA; Weddell-Scotia confluence; Euphausia frigida; Euphausia superba; Euphausiacea; Euphausiidae; Thysanoessa macrura
Año:2019
Volumen:19
Página de inicio:86
Página de fin:93
DOI: http://dx.doi.org/10.1016/j.polar.2018.11.004
Título revista:Polar Science
Título revista abreviado:Polar Sci.
ISSN:18739652
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_18739652_v19_n_p86_Rombola

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Citas:

---------- APA ----------
Rombolá, E.F., Franzosi, C.A., Tosonotto, G.V., Alder, V.A. & Marschoff, E.R. (2019) . Variability of euphausiid larvae densities during the 2011, 2012, and 2014 summer seasons in the Atlantic sector of the Antarctic. Polar Science, 19, 86-93.
http://dx.doi.org/10.1016/j.polar.2018.11.004
---------- CHICAGO ----------
Rombolá, E.F., Franzosi, C.A., Tosonotto, G.V., Alder, V.A., Marschoff, E.R. "Variability of euphausiid larvae densities during the 2011, 2012, and 2014 summer seasons in the Atlantic sector of the Antarctic" . Polar Science 19 (2019) : 86-93.
http://dx.doi.org/10.1016/j.polar.2018.11.004
---------- MLA ----------
Rombolá, E.F., Franzosi, C.A., Tosonotto, G.V., Alder, V.A., Marschoff, E.R. "Variability of euphausiid larvae densities during the 2011, 2012, and 2014 summer seasons in the Atlantic sector of the Antarctic" . Polar Science, vol. 19, 2019, pp. 86-93.
http://dx.doi.org/10.1016/j.polar.2018.11.004
---------- VANCOUVER ----------
Rombolá, E.F., Franzosi, C.A., Tosonotto, G.V., Alder, V.A., Marschoff, E.R. Variability of euphausiid larvae densities during the 2011, 2012, and 2014 summer seasons in the Atlantic sector of the Antarctic. Polar Sci. 2019;19:86-93.
http://dx.doi.org/10.1016/j.polar.2018.11.004