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Aislamiento de Plesiomonas shigelloides y Aeromonas veronii biotipo sobria en heces de lobo marino común sudamericano, Otaria flavescens(Shaw, 1800)

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Dieta del langostino Pleoticus muelleri (Bate, 1888) en fondos de pesca patagónicos, Argentina

RESEARCH NOTE

Aplicación de calceína para la estimación del crecimiento de la almeja amarilla Mesodesma mactroides Reeve, 1854

Authors

CORRESPONDING

Mauro L. Lepore

maurolepore@gmail.com

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Lab. Invertebrados, Depto. de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 4° piso, Lab. 19, C1428EHA, Buenos Aires, Argentina

Mauro L. Lepore

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Lab. Invertebrados, Depto. de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 4° piso, Lab. 19, C1428EHA, Buenos Aires, Argentina

José E. F. Alfaya

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Lab. Invertebrados, Depto. de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II, 4° piso, Lab. 19, C1428EHA, Buenos Aires, Argentina

Marko Herrmann

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Alfred Wegener Institute for Polar and Marine Research (AWI), Section of Marine Animal Ecology, Postfach 120161, D-27515, Bremerhaven, Germany

Abstract

Growth rates of Mesodesma mactroides were estimated comparing two different methods at the intertidal of the exposed sandy beach Santa Teresita, Argentina. Results
of a short tagging-recapture experiment using the in situ fluorescent marking (MFI) method and subsequent size-increment analysis were compared with results from length-frequency distributions (DFT) analysis from a 25 month quantitative sampling. Residuals, derived from MFI method and DFT analysis, were of similar magnitude and distribution, suggesting that both methods are equally appropriate to estimate growth of M. mactroides. Calcein was useful as non-lethal growth marker for M. mactroides, emitting a bright green fluorescence band under blue light.

Key words

In situ fluorescent marking, comparison of methods, daily growth rate, length-frequency distribution, overall growth performance index

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