A5017382839- Parasite Biology and Host Interactions
- Plant Pathogens and Fungal Diseases
- Marine animal studies overview
- Fish Ecology and Management Studies
- Aquatic Invertebrate Ecology and Behavior
- Evolution and Genetic Dynamics
- Plant Pathogens and Resistance
- Aquaculture disease management and microbiota
- Helminth infection and control
- Mycorrhizal Fungi and Plant Interactions
- Myxozoan Parasites in Aquatic Species
- Marine and coastal plant biology
- Cultural Heritage Materials Analysis
- Parasites and Host Interactions
- Wildlife Ecology and Conservation
- Fish Biology and Ecology Studies
- Cephalopods and Marine Biology
- Plant and animal studies
- Conservation Techniques and Studies
- Environmental and Biological Research in Conflict Zones
- Environmental DNA in Biodiversity Studies
- Ichthyology and Marine Biology
- Spectroscopy and Chemometric Analyses
- Yeasts and Rust Fungi Studies
- Underwater Acoustics Research
Norwegian Institute for Nature Research
2019-2025
Cardiff University
2017-2021
Professional Services Group (United States)
2021
University of Otago
2003-2018
Queen's University Belfast
2013-2017
University of Leeds
2014
Manaaki Whenua – Landcare Research
2010
Queensland Museum
2004
Virginia Tech
1973
University of Maryland, College Park
1958-1967
Abstract Invasion ecology urgently requires predictive methodologies that can forecast the ecological impacts of existing, emerging and potential invasive species. We argue many ecologically damaging invaders are characterised by their more efficient use resources. Consequently, comparison classical ‘functional response’ (relationship between resource availability) trophically analogous native species may allow prediction invader impact. review utility trait comparisons history context...
Summary Consumer‐resource interactions (i.e. the functional response) underpin decades of ecological advancements. However, selecting, fitting and comparing response models using appropriate methods remains a non‐trivial endeavour. The R package frair provides tools for selecting differentiating various forms consumer models, consistent interface visualising curves, selection statistically robust fitted parameters. Using real data from crustacean predator‐prey systems, we demonstrate utility...
Summary 1. Biological invasions, still occurring worldwide at an alarming rate, are widely acknowledged as threats to the integrity and functioning of ecosystems. In addition introducing disease, biological invasions have also been linked sudden increases in incidence or severity previously existing diseases. We review illustrate potential direct indirect impacts introduced species on dynamics endemic parasites freshwater 2. Introduced may trigger sustain disease emergence by acting...
Summary Predatory functional responses play integral roles in predator–prey dynamics, and their assessment promises greater understanding prediction of the predatory impacts invasive species. Other interspecific interactions, however, such as parasitism higher‐order predation, have potential to modify interactions thus predictive capability comparative response approach. We used a four‐species community module (higher‐order predator; focal native or predators; parasites prey) compare...
Summary 1. It is well recognised that non‐indigenous species (NIS) can affect native communities via the ‘spillover’ of introduced parasites. However, two other potentially important processes, ‘spillback’ parasites from a competent NIS host, where latter acts as reservoir leading to amplified infection in hosts, and ‘dilution’ parasitism by host acting sink for parasites, have either not been tested or largely overlooked. 2. We surveyed helminth parasite fauna New Zealand fish Otago streams...
Abstract Interactions among multiple anthropogenic stressors threaten freshwater fish and pose challenges for fisheries management conservation. Previous studies of multiple‐stressor effects on suggest a prevalence antagonistic interactions. However, taxonomy, life stage and/or environmental context likely modify the magnitude direction responses to stressors. Stressor intensity, impact mechanism, exposure time ecosystem size may further affect interaction outcomes. Large‐scale quantifying...
Nonconsumptive or trait-mediated effects of predators on their prey often outweigh density-mediated interactions where consume prey. For instance, predator presence can alter behaviour, physiology, morphology and/or development. Despite a burgeoning literature, our ability to identify general patterns in behavioural responses may be influenced by the inconsistent methodologies cue experiments used assess effects. We therefore conducted meta-analysis highlight variables (e.g. water type,...
Abstract Regression models are developed and presented to predict dry mass (mg) from two linear dimensions (mm) for 17 benthic macroinvertebrate taxa common littoral zones of New Zealand lakes. We also provide regression body length head capsule width the major insect taxa. Dry was best explained as a power function all dimensions: M = aL b .Parameters in log10‐transformed form this function. Body simple taxa, hence parameters these untransformed values. family level Chironomidae, compare...
1. Native parasite acquisition provides introduced species with the potential to modify native host–parasite dynamics by acting as reservoirs (with 'spillback' of infection increasing burdens hosts) or sinks 'dilution' decreasing infection. 2. In New Zealand, negative correlations between presence brown trout (Salmo trutta) and roundhead galaxias (Galaxias anomalus) have been observed, suggesting that dilution is occurring. 3. We used a multiple-scale approach combining field observations,...
Abstract Near infrared reflectance spectroscopy (NIRS) was used to study the properties of intact and minced lamb muscles in two presentations instrument predict their chemical composition. A total 306 were examined from 51 lambs, consisting following muscles: longissimus dorsi, supraspinatus, infraspinatus, semimembranosus, semitendinosus rectus femoris . Modified partial least squares (MPLS) regression models variables yielded R 2 standard error cross-validation (SECV) 0·76 (SECV: 10·4),...
Near infrared (NIR) reflectance spectroscopy was used to determine the chemical composition of chicken breast and thigh muscles. Samples from twenty-four males females were scanned 400 2500 nm, both as intact muscle comminuted (minced) tissue. Modified partial least squares (MPLS) regression on scatter corrected spectra (standard normal variates Detrend) gave calibration models for variables NIR measurements defrosted minced samples having multivariate correlation coefficients standard...
Disease‐mediated threats posed by exotic species to native counterparts are not limited introduced parasites alone, since hosts frequently acquire with possible consequences for infection patterns in hosts. Several biological and geographical factors thought explain both the richness of hosts, invasion success free‐living species. However, determinants parasite acquisition remain unknown. Here, we investigated communities freshwater fish determine which traits influence Model selection...
Cannibalism is ubiquitous in nature and especially pervasive consumers with stage-specific resource utilization resource-limited environments. thus influential the structure functioning of biological communities. Parasites are also and, we hypothesize, might affect cannibalism since infection can alter host foraging behaviour. We investigated effects a common parasite, microsporidian Pleistophora mulleri, on rate its host, freshwater amphipod Gammarus duebeni celticus. Parasitic increased by...
(1956). Additions to the Phycomycete Flora of Douglas Lake Region. II. New Chytridiaceous Fungi. Mycologia: Vol. 48, No. 2, pp. 270-277.
Abstract Free‐living parasite life stages may contribute substantially to ecosystem biomass and thus represent a significant source of energy flow when consumed by non‐host organisms. However, ambient temperature the predator's own infection status modulate consumption rates towards prey. We investigated combined effects predator on consumer functional response three‐spined sticklebacks free‐living cercariae two common freshwater trematode parasites ( Plagiorchis spp., Trichobilharzia franki...
SUMMARY There is a gap in our understanding of the relative and interactive effects different parasite species on same host population. Here we examine acanthocephalan Acanthocephalus galaxii , an unidentified cyclophyllidean cestode, trematodes Coitocaecum parvum Microphallus sp. several fitness components amphipod Paracalliope fluviatilis using combination infection surveys both survival behavioural trials. In addition to significant relationships between specific parasites measures...
SUMMARYTwo new species are described from two lakes and a river in Washtenaw County, Michigan, namely, Rhizophydium pelagicum horizontale, parasitic on Colacium sp. Stephanodiscus sp., respectively. Further details the life history of Amphicypellus elegans previously noted by Canter as Rhizosolenia eriensis England given. New records for United States listed following taxa: Septolpidium lineare, planktonicum, fragilariae, Rhizosiphon anabaenae, Polyphagus ramosus, Endocoenobium sp.The author...