Michael Kent results 109
· Newest (Page 1/5, per page 25)
Author: Michael Kent ×Clear All Filters
Search Results
Temperature Influences Pseudocapillaria tomentosa Infections in Zebrafish, Danio rerio (Hamilton 1822)NARA Subscribed
Poikilothermic organisms like fish are key economic drivers in aquaculture and the ornamental fish trade. Climate change impacts the health of fish because poikilothermic hosts experience the same temperature as their environment, making temperature a critical determinant of parasite infection dynamics. Pseudocapillaria tomentosa , a capillarid nematode infecting approximately 20% of zebrafish research facilities, provides an...
Resident and Migratory Falcons' Breeding Phenology and Productivity Respond Differently to Weather and Climate Change Across the ArcticNARA Subscribed
Climate change is disproportionately warming the Arctic, leading to changes in weather patterns that affect breeding phenology for many Arctic species. Despite extensive research on non‐predatory birds, few studies have examined the impacts of climate change on higher trophic levels, especially those comparing breeding phenology and productivity between migratory and resident species. Our study used long‐term monitoring data f...
Quantifying Pathogen eDNA at a Trap‐and‐Haul Facility for Adult Chinook Salmon ( Oncorhynchus tshawytscha )NARA Subscribed
Adult Chinook salmon ( Oncorhynchus tshawytscha ) trap‐and‐haul operations exist in rivers across the Pacific Northwest with the objective of re‐establishing salmon populations above impoundments. These efforts are complicated by high prespawn mortality (PSM), which can hinder restoration by reducing reproductive success. Recent improvements at trapping facilities in the Willamette River Basin, Oregon, USA, may reduce PSM by s...
Laboratory Transmission of Adult Salmon Enteritis and Associated Pathogens in Juvenile Chinook Salmon ( Oncorhynchus tshawytscha )NARA Subscribed
Adult salmon enteritis (ASE), characterised by severe ulcerative enteritis, has been linked to prespawn mortality (PSM) in spring Chinook salmon ( Oncorhynchus tshawytscha ) in certain rivers in Oregon, USA. Catastrophic losses of spring Chinook salmon have resulted from PSM, a significant threat to their population stability. Understanding the causes of ASE is therefore critical for mitigating PSM and supporting conservation....
Marine megafauna species are affected by a wide range of anthropogenic threats. To evaluate the risk of such threats, species’ vulnerability to each threat must first be determined. We build on the existing threats classification scheme and ranking system of the International Union for Conservation of Nature (IUCN) Red List of Threatened Species by assessing the vulnerability of 256 marine megafauna species to 23 at‐sea threat...
Motivation Here, we make available a second version of the BioTIME database, which compiles records of abundance estimates for species in sample events of ecological assemblages through time. The updated version expands version 1.0 of the database by doubling the number of studies and includes substantial additional curation to the taxonomic accuracy of the records, as well as the metadata. Moreover, we now provide an R packag...
The Toxicology Investigators Consortium 2023 Annual ReportNARA Subscribed
Introduction Systemic inflammation and endothelial dysfunction are potentially modifiable factors implicated in Alzheimer’s disease (AD), which offer potential therapeutic targets to slow disease progression. Methods We investigated the relationship between baseline circulating levels of inflammatory (TNF-α, IL-1ß) and endothelial cell markers (VCAM-1, ICAM-1, E-selectin) and 18-month cognitive decline (ADAS-cog12) in 266 mild...
Degradation Modelling of and Optimising the Timing of Replacements for Batch Vacuum PansNARA Subscribed
Replacing a pan involves the expenditure of significant capital for a sugar mill. Replacing a pan too late may result in excessive downtime, maintenance costs, and risk of catastrophic failure. On the other hand, replacing a pan too early will lead to wasting residual life and an unnecessary allocation of capital funds that may have been spent better elsewhere in the mill. This paper reports on the development of a replacement...
Demographic history shapes North American gray wolf genomic diversity and informs species' conservationNARA Subscribed
Effective population size estimates are critical information needed for evolutionary predictions and conservation decisions. This is particularly true for species with social factors that restrict access to breeding or experience repeated fluctuations in population size across generations. We investigated the genomic estimates of effective population size along with diversity, subdivision, and inbreeding from 162,109 minimally...
Intestinal lesions and parasites associated with senescence and prespawn mortality in Chinook Salmon ( Oncorhynchus tshawytscha )NARA Subscribed
Prespawn mortality (PSM) presents a major problem for the recovery of spring Chinook Salmon ( Oncorhynchus tshawytscha ) populations. In the Willamette River, Oregon, PSM exceeds 90% in some years but factors explaining it are not well understood. We examined intestinal tissue samples using histological slides from over 783 spring Chinook Salmon collected between 2009 and 2021, which included tissues from PSM fish, artificiall...
Here, we provide evidence that the freshwater parasitic copepod, Salmincola californiensis , acts as a vector for Aeromonas salmonicida. While investigating the effects of S. californiensis on Chinoook salmon ( Oncorhynchus tshawytscha ), we tangentially observed that fish infected with the copepod developed furunculosis, caused by A. salmonicida . This occurred despite being reared in pathogen‐free well water in a research fa...
Genome-wide association studies (GWAS) in long-lived human populations have led to identification of variants associated with Alzheimer’s disease and cardiovascular disease, the latter being the most common cause of mortality in people worldwide. In contrast, naturally occurring cancer represents the leading cause of death in pet dogs, and specific breeds like the Golden Retriever (GR) carry up to a 65% cancer-related death ra...