A5034424072- Ichthyology and Marine Biology
- Marine animal studies overview
- Fish biology, ecology, and behavior
- Fish Ecology and Management Studies
- Coral and Marine Ecosystems Studies
- Fish Biology and Ecology Studies
- Marine and fisheries research
- Animal Vocal Communication and Behavior
- Animal Behavior and Reproduction
- Neurobiology and Insect Physiology Research
- Plant and Biological Electrophysiology Studies
- Primate Behavior and Ecology
- Insect and Arachnid Ecology and Behavior
- Identification and Quantification in Food
- Retinal Development and Disorders
- Evolution and Paleontology Studies
The University of Western Australia
2012-2019
Ocean Institute
2015-2019
Sharks use highly sensitive electroreceptors to detect the electric fields emitted by potential prey. However, it is not known whether prey animals are able modulate their own bioelectrical signals reduce predation risk. Here, we show that some shark (Chiloscyllium punctatum) embryos can predator-mimicking and respond ceasing respiratory gill movements. Despite being confined small space within egg case, where they vulnerable predators, embryonic sharks recognise dangerous stimuli react with...
Sharks play a vital role in the health of marine ecosystems, but potential threat that sharks pose to humans is reminder our vulnerability when entering ocean. Personal shark deterrents are being marketed as solution mitigate pose. However, effectiveness claims many personal based on knowledge sensory biology rather than robust testing devices themselves, most have not been subjected independent scientific studies. Therefore, there clear need for thorough commercially available provide...
Dietary characteristics and the degree of dietary partitioning by five species sympatric stingray were assessed using stomach content sediment analyses within a coral reef lagoon at Ningaloo Reef, Western Australia (the cowtail Pastinachus atrus , blue‐spotted fantail Taeniura lymma mask Neotrygon kuhlii porcupine Urogymnus asperrimus rays reticulate whipray Himantura uarnak ). A total 2804 items recovered from stomachs 170 3215 individual taxa environment, which used in selectivity...
Abstract The effect of sound on the behaviour sharks has not been investigated since 1970s. Sound is, however, an important sensory stimulus underwater, as it can spread in all directions quickly and propagate further than any other cue. We used a baited underwater camera rig to record behavioural responses eight species (seven reef coastal shark white shark, Carcharodon carcharias ) playback two distinct stimuli wild: orca call sequence artificially generated sound. When sounds were...
Quantitative studies of sensory axons provide invaluable insights into the functional significance and relative importance a particular modality. Despite important role electroreception plays in behaviour elasmobranchs, to date, there have been no that assessed number electrosensory project from peripheral ampullae central nervous system (CNS). The complex arrangement morphology has significant influence on its function. However, it is not sufficient base conclusions about function alone. To...
Post-copulatory sexual selection, and sperm competition in particular, is a powerful selective force shaping the evolution of morphology. Although mounting evidence suggests that post-copulatory selection influences morphology among species, recent also variation at intraspecific level. However, contradictory empirical results limited taxonomic scope have led to difficulty assessing generality morphological responses strength competition. Here, we use phylogenetically controlled analyses...
Electroreception is an ancient sense found in many aquatic animals, including sharks, which may be used the detection of prey, predators and mates. Wobbegong sharks (Orectolobidae) angel (Squatinidae) represent two distantly related families that have independently evolved a similar dorso-ventrally compressed body form to complement their benthic ambush feeding strategy. Consequently, these groups useful models investigate specific morphological physiological adaptations are driven by...
Personal shark deterrents offer the potential of a non-lethal solution to protect individuals from negative interactions with sharks, but claims effectiveness most are based on theory rather than robust testing devices themselves. Therefore, there is clear need for thorough commercially available provide public information their effectiveness. Using modified stereo-camera system, we quantified behavioural between Carcharodon carcharias (white sharks) and baited target in presence electric...
Elasmobranch fishes (sharks, skates and rays) possess a highly sensitive electrosensory system that enables them to detect weak electric fields, such as those produced by potential prey organisms. Despite several comparative anatomical studies, the functional significance of interspecific variation in morphology remains poorly understood. In present study, we directly tested electrosensitivity two benthic elasmobranchs share similar habitat feed on similarly sized items (Port Jackson sharks,...
The eyes of five ray species <i>(Taeniura lymma</i>, <i>Neotrygon kuhlii</i>, <i>Pastinachus atrus</i>, <i>Himantura uarnak</i> and <i>Urogymnus asperrimus)</i> from the same taxonomic family (Dasyatidae) geographic region (Ningaloo Reef, Western Australia) were studied to identify differences in retinal specializations that may reflect niche specialization. topographic distributions photoreceptors (rods all cones) ganglion cells...
Shark depredation (damage to gear and loss of bait or hooked fish by a non-target species) is common global occurrence. Depredation events sharks can have negative impacts for the fishers, fishery targeted species sharks. It is, therefore important better understand if learning behaviour influence rates depredation. Recreational fishers within World Heritage Ningaloo Reef reported increased over last 5 years. This study aimed determine are capable associate intensive recreational fishing...
Shark depredation (damage to gear and loss of bait or hooked fish by a non-target species) is common global occurrence. Depredation events sharks can have negative impacts for the fishers, fishery targeted species sharks. It is, therefore important better understand if learning behaviour influence rates depredation. Recreational fishers within World Heritage Ningaloo Reef reported increased over last 5 years. This study aimed determine are capable associate intensive recreational fishing...