Weather

Wind, sea, and sky conditions and the temperature of the air, surface and bottom waters were noted on each occasion with a view to detecting a possible connection between weather conditions and the size and composition of the catches.

The temperature of the surface and bottom waters was taken with a hydro-graphic bottle (Dwyer, 1932) and a standard laboratory thermometer (see Fig. 3). It has been possible to correlate the temperature only with the release off larvae (see page 16).