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Título:
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Fishery Investigations, 1955 Series II. vol. XVIII n° 9 - Variada - Estimation of growth and mortality in commercial fish populations
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Autores:
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J.A. Gulland, Autor
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Tipo de documento:
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Serial check-in : texto impreso
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Fecha de aparición:
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01/04/1955
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Fecha de publicación:
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1955
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Dimensiones:
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46
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Idiomas:
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Inglés
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Palabras claves:
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Crecimiento,Mortalidad,Población de peces
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Resumen:
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Dead fish were hung in their swimming positions from netting stretched across a frame, which in its turn was suspended beneath an echo sounder. Observations were made on different numbers of cod, herring, and 110 c.c. air bladders at different depths. Signals were matched on a C.R.O. with a signal injector put in the circuit between the receiver and the amplifier.
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