Risk & Resource
drivers of spatiotemporal behaviour in a juvenile marine predator
Project Overview
The foundation of this researc is a novel framework and workflow for marine ecology called the Seascapes of Ecological Energy (SEE-scapes). SEE-scapes is developed as a tool for researchers interested in studying marine vertebrate behaviour in the contemporary marine environment, taking a holistic and hierarchical perspective on the possible drivers of behaviour.
Adopting a first principles approach, where the potential influence of all ecological concerns start as equally likely, the framework outlines how to successively study proposed drivers of behaviour, comparing the direction and magnitude of the impact of a driver on resultant behaviour. It is our aim that this framework will enable marine ecologists to work towards more realistic predictions of marine vertebrates behaviour in an ever-evolving contemporary seascape.
In my work, I use the framework to study the behaviour of juvenile lemon sharks, in a mangrove nursery, in Bimini, Bahamas. In some cases I utilise Bayesian statistics and employ habitat and resource selection functions to help tease apart the drivers of spatial behaviour in an early-life stage of this IUCN listed Vulnerable species.
Study System & Species
Negaprion brevirostris
I work with juvenile lemon sharks, on the remote island of Bimini, in The Bahamas. This subpopulation of sharks is natally philopatric, meaning the females give birth in the mangroves where they themselves were born. The juveniles then stay around in the nursery lagoon habitat for five years. This study system offers the opportunity for replicate sampling of the same individuals - a rare thing in a wild marine environment.
My data comes from multiple collaborators to whom I am very grateful.
Bimini, The Bahamas
Bimini is a mangrove fringed island on the Great Bahamian Bank. It's northern lagoon and southern coast are critical nursery grounds for the North Atlantic population of juvenile lemon sharks.
Bimini is comprised of two islands, a north and south island, connected by a narrow channel to the southwest. My study sites span a portion of the southern coast of South Bimini; and large areas of the northern lagoon of North Bimini, including areas known as Bonefish Hole, North Sound, and Shark Land. The habitats are defined by a mangrove fringed coast, shallow seagrass beds, sand flats, and dramatic daily tides.
Research Questions
Seascapes of Ecological Energy (SEE-scapes): a novel conceptual framework for the contemporary marine environment.
How can we consolidate decades of progress in terrestrial, aquatic, laboratory, and marine behavioural research, into a guide for current and future researchers in the marine environment? See Publications for the published perspective and workflow.Are juvenile lemon sharks responding to the distribution of habitat features in the northern Bimini lagoon?
A novel approach to habitat selection in a juvenile marine predator.Of the possible and measureable pathways of ecological influence, what are the holistic and hierarchical drivers of juvenile lemon shark spatial behaviour?
Development and application of a Bayesian structural equation model to investigate the SEE-scape of juvenile lemon sharks.
Coming Soon...
This paper will address Research Question 2, stay tuned.