Modeling the population dynamics of lemon sharks

Are indirect genetic benefits associated with polyandry? Testing predictions in a natural population of lemon sharks.

Multiple mating has clear fitness benefits for males, but uncertain benefits and costs for females. We tested for indirect genetic benefits of polyandry in a natural population, by using data from a long-term genetic and demographic study of lemon sharks (Negaprion brevirostris) at Bimini, Bahamas. To do so, we followed the fates of individuals from six cohorts (450 age-0 and 254 age-1 fish) in...

Transoceanic migration, spatial dynamics, and population linkages of white sharks.

The large-scale spatial dynamics and population structure of marine top predators are poorly known. We present electronic tag and photographic identification data showing a complex suite of behavioral patterns in white sharks. These include coastal return migrations and the fastest known transoceanic return migration among swimming fauna, which provide direct evidence of a link between widely s...

Modeling Population Dynamics

Modeling Population Dynamics

Global phylogeography and seascape genetics of the lemon sharks (genus Negaprion).

Seascapes are complex environments, and populations are often isolated by factors other than distance. Here we investigate the role of coastal habitat preference and philopatry in shaping the distribution and population structure of lemon sharks. The genus Negaprion comprises the amphiatlantic lemon shark (N. brevirostris), with a relict population in the eastern Pacific, and its Indo-West Paci...