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Dictionary of ichthyology
- 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

abbreviation for acre (4046.9 m2, 0.405 ha, 43,560 ft2, 4840 yd2, 0.00156 mi2)
abbreviation for anal fin (rays)
annual total mortality rate (the number of fish which die during a year divided by the initial number. Also called actual mortality rate, coefficient of mortality (Ricker, 1975))
abbreviation for annum, meaning year. Usually used in combination, e.g. Ma, meaning million years

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