Dahlia FooUniversity of Tasmania · Institute for Marine and Antarctic Studies (IMAS)
Dahlia Foo
Doctor of Philosophy
About
8
Publications
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54
Citations
Citations since 2017
Introduction
What I'm doing now –– Officially a PhD graduate since Aug 2020. Now I'm exploring options and going off random tangents working on personal projects that I said "I'll do after my PhD". Learning about marketing, story telling, making videos, playing with drones, following the development of blockchain and crypto closely. Also writing a lit review on marine mammal interactions with finfish farms in Tasmania. Find me at dahliafoo.xyz
Publications
Publications (8)
Finding food is crucial to the survival and reproductive success of individuals. Fidelity to previous proftable foraging sites
may bring benefts to individuals as they can allocate more time to foraging rather than searching for prey. We studied how
environmental conditions infuence when lactating long-nosed fur seals (Arctocephalus forsteri) adopt...
2018/19 Campbell Island NZ sea lion trip report for the NZ Department of Conservation
The shelf and oceanic waters of the Kangaroo Island–Bonney Coast region are important foraging habitats for top marine predators in the ecosystem; however, the dynamics between the two distinct water types have not been investigated. This study examined the spatial and temporal variability of oceanographic parameters in the southern waters of Austr...
We investigated how foraging ecotypes of female long-nosed fur seals (Arctocephalus forsteri) could be identified from vibrissa stable isotopes. We collected regrowths of vibrissae from adult females (n = 18) from Cape Gantheaume, Kangaroo Island, South Australia from two breeding seasons (2016, 2017). The period represented by the regrowth was kno...
Understanding the drivers to foraging strategies in space and time is an important aspect of ecology that is necessary for management and conservation. Within the highly dynamic marine environment, prey availability changes spatially and temporally over seasons and years. Consequently, marine predators may have to employ different foraging strategi...
Central place foragers often change their foraging behaviour in response to changes in prey availability in the environment. Lactating Long-nosed fur seals (LNFS; Arctocephalus forsteri) at Cape Gantheaume in South Australia have been observed to display alternate foraging strategies where they forage on the shelf in summer and switch to oceanic fo...
Empirical testing of optimal foraging models on diving air-breathing animals is limited due to difficulties in quantifying the prey field through direct observations. Here we used accelerometers to detect rapid head movements during prey encounter events (PEE) of free-ranging benthic-divers, Australian fur seals, Arctocephalus pusillus doriferus. P...
Aquatic environments can be restricted with the amount of available food resources especially with changes to both abiotic and biotic conditions. Mosquito larvae, in particular, are sensitive to changes in food resources. Resource limitation through inter-, and intra-specific competition among mosquitoes are known to affect both their development a...
Projects
Projects (2)
I have been investigating a variety of ecological factors influencing the RRV vector, Aedes. camptorhynchus, in Southern Tasmanian salt marshes. Some of which include aquatic competition, ovipositoion preferences and environmental factors determining mosquito populations
My PhD project.
Brief background:
Lactating female fur seals are central place foragers, alternating foraging at-sea to nursing their fasting pup on land. They forage on the shelf in summer, where their foraging trips last ~ 4 days. Towards autumn/winter, they transit to foraging in distant oceanic waters (sub tropical front; ~ 1000 km away from colony), where their foraging trips can last up to 2 weeks.
Why do they make this transition? Is it because shelf waters are not productive anymore due to the cessation of localised upwelling (Bonney upwelling)? Or are oceanic waters at the sub tropical front always more productive than shelf waters, but the constraint of nursing their young fasting pup limits them from traveling too far early in the lactation period? Is it better to transit earlier or later – in the sense of short-term reproductive success?
Field research location: Long-nosed fur seals (previously New Zealand fur seal) at Cape Gantheaume, Kangaroo Island, South Australia.
