In females of haplodiploid animals, female production requires fertilisation, whereas male production does not. Therefore, haplodiploid species can display extraordinary sex ratios. Constrained sex allocation occurs when a female cannot produce daughters. This can be due to virginity but may also occur after mating due to insemination failure, selfish genetic elements or physiological constraints. Here, we investigated the mechanism underlying constrained sex allocation in Pezothrips kellyanus. In this species some mated females produce highly female-biased...
Thermal imaging technology is a developing field in wildlife management. Most thermal imaging work in wildlife science has been limited to larger ungulates and surface-dwelling mammals. Little work has been undertaken on the use of thermal imagers to detect fossorial animals and/or their burrows. Survey methods such as white-light spotlighting can fail to detect the presence of burrows (and therefore the animals within), particularly in areas where vegetation obscures burrows. Thermal imagers offer opportunity to...
Mini-acoustic sensors reveal occupancy and threats to koalas (Phascolarctos cinereus) in private native forestsBrad Law, Isobel Kerr, Leroy Gonsalves, Traecey Brassil, Philip Eichinski, Anthony Truskinger & Paul Roe
1. Forests on private land have a wide range of uses that span activities such as recreation, primary production and nature conservation. Traditionally, it has been difficult for researchers to access private land to undertake systematic surveys. We used mini-acoustic sensors (Audiomoth) mailed via the postal service to overcome landholder concerns about researchers accessing private property, with a focus on properties used for private native forestry. 2. We surveyed koalas, an iconic threatened marsupial, in...
Increasing fishing effort, including bycatch and discard practices, are impacting marine biodiversity, particularly among slow-to-reproduce taxa such as elasmobranchs, and specifically sharks. While some fisheries involving sharks are sustainably managed, collateral mortalities continue, contributing towards > 35% of species being threatened with extinction. To effectively manage shark stocks, life-history information, including resource use and feeding ecologies is pivotal, especially among those species with wide-ranging distributions. Two cosmopolitan sharks bycaught off eastern Australia are the common...
Climate change is increasingly impacting ecosystems globally. Understanding adaptive genetic diversity and whether it will keep pace with projected climatic change is necessary to assess species’ vulnerability and design efficient mitigation strategies such as assisted adaptation. Kelp forests are the foundations of temperate reefs globally but are declining in many regions due to climate stress. A lack of knowledge of kelps’ adaptive genetic diversity hinders assessment of vulnerability under extant and future climates. Using 4245...
When the fitness costs and benefits of sons and daughters differ, offspring sex ratio manipulation could be an important reproductive tactic. We explored the effects of environment and maternal caring ability on offspring sex to test four adaptive sex ratio modification hypotheses: the Extrinsic Modification (EMH), Carrying Capacity (CCH), Trivers-Willard (TWH) and Cost-of-Reproduction (CRH) hypotheses. The EMH and CCH propose that environmental conditions shape offspring sex ratios, directly or in interaction with maternal condition. The...
Data from: Transgenerational plasticity responses of oysters to ocean acidification differ with habitatLaura Parker, Elliot Scanes, Wayne O'Connor & Pauline Ross
This dataset contains data from a two-part experiment described in the paper: Transgenerational plasticity responses of oysters to ocean acidification differ with habitat, J Exp Biol jeb.239269. This paper assessed the role of tidal habitat on the existing and transgenerational response of larvae of the Sydney rock oyster, Saccostrea glomerata to ocean acidification caused by elevated carbon dioxide (CO2). In experiment 1, gravid Sydney rock oysters were collected from the subtidal and high intertidal zone...
The burden of size and growth for the juveniles of large mammalian herbivores: structural and functional constraints in the feeding biology of juveniles relative to adults in red kangaroos, Osphranter rufusTerence Dawson, Melinda Norton, Suzette Rodoreda, Sarah Abbott & Steven McLeod
Juvenile mammals in their post weaning developmental stages face many challenges in transitioning to adulthood. Among large grazing species such as ruminant bovids and cervids an overarching challenge is acquiring and processing sufficient nutrients to survive and grow, with a gut that may not yet be fully developed. Marsupial kangaroos of Australia face similar challenges; they also digest vegetation by fermentation in a large foregut. In red kangaroos, Osphranter rufus (= Macropus rufus), the dominant...
New South Wales Department of Primary Industries8
University of Sydney2
Université de Sherbrooke1
Cold Spring Harbor Laboratory1
University of Technology Sydney1
Queensland University of Technology1
Western Sydney University1
University of Western Australia1