Size and sexual maturity of a large number of Loligo gahi Orbigny 1835 from commercial trawler catches around the Falkland Islands were recorded.Data are explained by proposing that the squid have a 1 yr lifespan and that the population consists of 2 stocks, one spring-spawning and one autumn-spawning.Degree of mixlng between the stocks was not assessed.Lnear and von Bertalanffy equations are used to model the growth of the spring-spawning stock.Both models fit the data nearly equally well, the linear fit yielding slope = 0.0237 for males (0.0199 for females) cm dorsal mantle length d-' growth rate and the von Bertalanffy fit yielding K = 0.00304 (0.00308) d-l, L , = 19.6 (17.8) cm, to = -101.4(-113.6)d from 1 Jan.This growth rate is surprisingly fast given the cold water temperatures around the Falklands, and suggests that food was plentiful for this species.
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K. R. Patterson (1988) studied this question.
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