. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 288 K. SHYAMASUNDARI (1973). Each experiment was repeated three times. All cultures were maintained at a constant temperature of 28° C (±° C). The dishes were examined daily and the degenerating eggs were removed. Water was changed every day. To test the combined effect of salinity and temperature, six salinities (10/{o, 15^0, 2Qf/cc, 25r/<c, 3W/CC, and 35#f) and five temperatures (9° C, 15° C, 22° C, 28° C, and 35° C) were chosen. Duplicate cultures were established at each of the six salinities and five temperatures
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 288 K. SHYAMASUNDARI (1973). Each experiment was repeated three times. All cultures were maintained at a constant temperature of 28° C (±° C). The dishes were examined daily and the degenerating eggs were removed. Water was changed every day. To test the combined effect of salinity and temperature, six salinities (10/{o, 15^0, 2Qf/cc, 25r/<c, 3W/CC, and 35#f) and five temperatures (9° C, 15° C, 22° C, 28° C, and 35° C) were chosen. Duplicate cultures were established at each of the six salinities and five temperatures tested, giving a total of 30 combinations and 60 cultures in each experiment. For all experiments controls were main- tained. Normally, development in amphipods is completed in ten days time at salinity 3Q'/ic and temperature 28° C. For convenience the entire development was divided into three stages: Stage I, advanced gastrula stage; Stage II, formation of rudimentary appendages; and Stage III, formation of eye. RESULTS Corophium triaenonyx eggs developed into young ones throughout a wide range of salinities from '/co to 37. 5f/(c at 28° C (±° C) maintained in the laboratory. At a higher concentration of 4Qr/(r, and a lower concentration of 5c/co development ceased. At ^c only of the embryos developed into normal young ones and at 35/vr, developed normally. At ,o and 10'/o only and , respectively, of the embryos developed normally. Approxi- mately of the embryos developed into young ones at ;c but the salinity range for a satisfactory development of at least was between 15^o and '/(o. Similarly more than 70% of the embryos developed into young ones between 20c/(c and , but the salinity range for a very high percentage (80%- 95%) was between '/,t and W/lf. \Yith temperature constant at 28° C (±° C), the optimum salinity range for embryonic development is {o to 30%o. The results are
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
