SOME EFFECTS OF TEMPERATURE ON THE EMBRYONIC DEVELOPMENT OF THE SALMON (SALMO SALAR)

1 February 1953

journal article
Published by Canadian Science Publishing in Canadian Journal of Zoology

Vol. 31 (1) , 42-51
https://doi.org/10.1139/z53-005

Abstract

This is a study of the effects of temperature on morphogenesis, and is an attempt to determine whether the order of appearance of anatomical features can be altered within the limits of survival. The time in days (usually from closure of the blastopore) for features to appear was noted, and from this the rates were calculated, being the reciprocals of days × 10³. Rate plotted against temperature gives in general a straight line whose slope may be calculated. Some slopes were: hatching, 4.6; digestive system, 6.4; skeleton, 6.5; nervous function, 8.2; external pigment, 9.6; blood vessels, 10.0; fins, 10.3; eye pigment, 12.5. Thus hatching would be expected to appear precociously at low temperatures, and eye pigment at high temperatures.

Keywords

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