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Some Effects of Salinity on the Survival, Moulting, and Growth of Corophium Volutator [Amphipoda]
Published online by Cambridge University Press: 11 May 2009
Extract
An experimental study of the effects of salinity on the mud-dwelling amphipod, Corophium volutator (Pallas), indicates that, if supplied with mud, it will survive the salinity range of 2.50 %0, and without mud the range 7.5-47–5 %0. Moulting occurred in salinities of 2.6–46 %0, but most frequently in the range 5–20 %0. Growth occurred at a maximum rate in 15.4 %0, and only slightly slower at 4.4 and 30.6 %0; but below 4.4 %0 the growth rate was progressively reduced. Freezing point studies show C, volutator to be a hyperosmotic regulator, having a tissue tolerance range of 13–50 %0. The importance of a supply of mud, and the significance of hyperosmotic regulation are briefly discussed.
INTRODUCTION
The amphipod Corophium volutator (Pallas) is an inhabitant of littoral muds, the populations often reaching high densities. It has been most commonly reported from shores of estuaries, although Zenkevitch (1963) has stated that it may also occur in muds submerged to a depth of 10 m. Segerstråle (1959) has summarized the data available on the occurrence and distribution of C. volutator. Since that date, work has been done on substrate selection (Meadows 1964a–c), on burrowing behaviour (Meadows & Reid, 1966) and on rhythmical swimming activity under tidal control (Morgan, 1965). Many authors (Nicol, 1935; Thamdrup, 1935; Beanland, 1940; Spooner & Moore, 1940; Rees, 1940; Goodhart, 1941; Stopford, 1951; Rullier, 1959; Gee, 1961) have described the substrate in which C. volutator occurs. They have agreed that C. volutator is found in mud or muddy sand, containing approximately 37 % silt or clay.
- Type
- Research Article
- Information
- Journal of the Marine Biological Association of the United Kingdom , Volume 47 , Issue 3 , October 1967 , pp. 607 - 617
- Copyright
- Copyright © Marine Biological Association of the United Kingdom 1967
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