Fig. 4
(a) Standardised width of presumably pregnant sharks over time. Day 0 indicates the last measurement before the sharks’ absence period, where we presume parturition may take place. Sharks scored 1 or 0 were visually assessed as ‘pregnant’ or ‘not pregnant’, while ‘not scored’ refers to a shark’s appearance, where we did not infer pregnancies based on their visual appearance (see Methods for more details). A linear regression model, including standard error, is fitted to the data until Day 0. (b) An example of one individual’s presumed pregnancy (F-049). Number in brackets provides a corresponding day value to a). The standardised width of this shark increased until day 0 followed by a period of absence for 93d. Upon its return, the standardised width of this shark had significantly declined.
