Data from: Heaviside's dolphins (Cephalorhynchus heavisidii) relax acoustic crypsis to increase communication rangeMorgan J. Martin, Tess Gridley, Simon H. Elwen & Frants H. Jensen
The costs of predation may exert significant pressure on the mode of communication used by an animal, and many species balance the benefits of communication (e.g. mate attraction) against the potential risk of predation. Four groups of toothed whales have independently evolved narrowband high-frequency (NBHF) echolocation signals. These signals help NBHF species avoid predation through acoustic crypsis by echolocating and communicating at frequencies inaudible to predators such as mammal-eating killer whales. Heaviside’s dolphins (Cephalorhynchus heavisidii)...
Data from: Non-invasive measurement of metabolic rates in wild, free-living birds using doubly labelled waterAmanda R. Bourne, Andrew E. McKechnie, Susan J. Cunningham, Amanda R. Ridley, Stephan M. Woodborne & William H. Karasov
1. Doubly labelled water (DLW) is routinely used to measure energy expenditure and water turnover in free-ranging animals. Standard methods involve capture, blood sampling for baseline measurement, injection with isotopic tracers, captivity for an equilibration period, post-dose blood sampling, release, and subsequent re-capture for final blood sampling. Single sampling methods that minimise disturbance by reducing capture and handling time have been developed and tested. Sampling faeces rather than blood could further reduce disturbance to study...
Data from: Urban nectarivorous bird communities in Cape Town, South Africa, are structured by ecological generalisation and resource distributionAnina Coetzee, Phoebe Barnard & Anton Pauw
Biological communities are increasingly faced with novel urban habitats and their response may depend on a combination of biological and habitat traits. The response of pollinator species to urban habitats are of particular importance because all species involved in the pollination mutualism may be affected. Nectarivorous bird communities worldwide show varying tolerances to urban areas, but studies from Africa are lacking. We investigated nectarivorous bird communities in a medium-sized South African city and asked which...
Data from: The benefits of pair bond tenure in the cooperatively breeding pied babbler (Turdoides bicolor)Elizabeth M. Wiley & Amanda R. Ridley
The benefits of stable pair bonds (that persist between breeding attempts) have been well described, but are relatively less well known in cooperatively breeding species. If pair bonds are beneficial, then it is possible that the bond between the behaviorally and socially dominant pair may influence factors such as reproductive success and group stability in cooperative species. Here we used long-term data to investigate the relationships between pair bond tenure, reproductive success and group stability...
Data from: Logical validation and evaluation of practical feasibility for the SCRuM (School Clinical Rugby Measure) test battery developed for young adolescent rugby players in a resource-constrained environmentMatthew Chiwaridzo, Danai Chandahwa, Sander Oorschot, Cathrine Tadyanemhandu, Jermaine M. Dambi, Gillian Ferguson, Bouwien C.M. Smits-Engelsman & Bouwien C. M. Smits-Engelsman
There is a growing impetus towards usage of test batteries in talent identification (TID) programmes in rugby. Consequently, there are many test batteries in existence profiling anthropometric, physiological characteristics and rugby-specific skills. There is no consensus in the literature on the constituent variables and corresponding tests required to inform TID programs. Following development of a new test battery called the SCRuM (School Clinical Rugby Measure), this study aimed at establishing face, logical validity and practical...
University of Cape Town31
University of Pretoria3
University of Western Australia3
South African National Biodiversity Institute2
Université Paul-Valéry Montpellier2
Royal Society for the Protection of Birds2
University of Cambridge2
Simon Fraser University2
Nelson Mandela University2
University of British Columbia2