Letter | Published:

Method of estimating Algal Production Rates at Sea

Naturevolume 212pages310311 (1966) | Download Citation



PRESENT methods of determining primary productivity in water make use of the chemical and physical processes in the metabolism of unicellular algae. An alternative is to try to estimate the algal production rate, which may be defined as the mean daily reproduction rate of all the algae in the water. One of us (D. H. C.)1–4 has already attempted to make preliminary estimates of this rate, both theoretically and in the sea.

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  1. 1

    Cushing, D. H., Fishery Invest., Lond., Ser. 2, 18, (7) (1955).

  2. 2

    Cushing, D. H., Nature, 179, 876 (1957).

  3. 3

    Cushing, D. H., J. Cons. Perm. Intern. Explor. Mer., 24, 455 (1959).

  4. 4

    Cushing, D. H., J. Mar. Biol. Assoc. U.K., 43, 339 (1963).

  5. 5

    El-Sayed, S. Z., and Lee, B. D., J. Mar. Res., 21, 59 (1963).

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  1. Fisheries Laboratory, Lowestoft, Suffolk

    • D. H. CUSHING
    •  & H. F. NICHOLSON


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