A Study on The Photo tactic Behaviour of Sardine(Sardineila perforata Cantor and Silverside(Atherina bleekeri Gunther)-Response to Diffused White Light and The Process of Adaptation to Iso-illuminative Spectral Colour
Sardine(SardinelIa perforate Cantor) shows the highest phototactic ratio towards the white light in the region of 0.1-1 lux but with the increase of light intensity, its phototactic ratio decreases. The reaction of the sitvcrside (Atherina bleekeri Gunther) under the same condition increases with the raising of the light intensity, and reaches its maximum within 10-100 lux region.Under the conditian of ico-illumination, phototactic respon.se of sardine and sjlverside to white and coloured lights, with the d...