Fig. 2
From: Courtship and spawning behaviour of medaka in a semi-outdoor environment initiating at midnight
(a) Frequency distribution of spawning events observed each hour over 24 h in medaka, Oryzias latipes (n = 31). The peak of spawning events was determined using gamma distribution fitting. (b) and (c) Changes in courtship behaviours from 18:00 to 17:00 over 24 h. (b) The total following duration (sec / 10 min) and (c) the number of quick-circle behaviours (number/10 min). Each plot (green circle: pre-mating male; red triangle: post-mating male) signifies the observed values from the analysed videos. The regression curves were based on the generalised additive mixed models (GAMMs) using all data (n = 744 observations from 31 males), and the shading indicates the 95% confidence intervals.
