Seasonal patterns of production in the sandy-beach amphipod Haustorius canadensis☆
The Haustorius canadensis population at Long Sands beach in southern Maine was studied over a period of 45 months. The length-weight relationship was examined over 24 months; it showed no difference due to either sex or month. Caloric content of the population displayed a seasonal cycle around a mean of 18·381 KJ gm−1 dry weight, peaking in mid to late summer. The increment summation, instantaneous growth, removal summation and size-frequency methods of calculating production were used and the results compared. The increment summation and instantaneous growth methods provided the best estimates of production, averaging 98·1 gm m−1 y−1 and 100·2 gm m−1 y−1, respectively. The annual production to mean biomass ratio averaged 1·48. The population exhibited strong peaks of production; the four summer months accounting for 4·65 times the production during the remainder of the year. Most of the production was due to one-year-old individuals.
Estuarine, Coastal and Shelf Science
Digital Object Identifier (DOI)
Donn, T.E. Jr. and R.A. Croker. 1986. Seasonal patterns of production in the sandy beach amphipod Haustorius canadensis. Estuarine, Coastal and Shelf Science 22:675-687.
Copyright © 1986 Published by Elsevier Ltd.