Population parameters

Individuals, population dynamics and life cycle

Bull sharks can be observed in the Shark Reef Marine Reserve throughout the year. Since 2003, more than 80 individual bull sharks have been identified using natural distinctive marks for individual recognition. These data form the backbone of the research into population dynamics, life cycles and inter- and intra-specific interactions.

The  number of bull sharks encountered at the Shark Reef Marine Reserve decreases over the course of a calendar year with fewest sightings in October and November. A likely explanation for their seasonal departure is reproductive activity.

Females with mating scars and wounds can be observed starting at the end of December into the beginning of a calendar year. Pregnancy in females, indicated by the streamlined shape typical of the non-pregnant female becoming more rounded, becomes apparent as of July and progresses until the end of the year.