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Full-Text Articles in Life Sciences
Impact Of Disease On The Survival Of Three Commercially Fished Species, John M. Hoenig, Maya L. Groner, Matthew W. Smith, Wolfgang K. Vogelbein, David M. Taylor, Donald F. Landers, John T. Swenarton, David T. Gauthier, Philip W. Sadler, Mark A. Matsche, Ashley N. Haines, Hamish J. Small, Roger Pradel, Remi Choquet, Jeffrey D. Shields
Impact Of Disease On The Survival Of Three Commercially Fished Species, John M. Hoenig, Maya L. Groner, Matthew W. Smith, Wolfgang K. Vogelbein, David M. Taylor, Donald F. Landers, John T. Swenarton, David T. Gauthier, Philip W. Sadler, Mark A. Matsche, Ashley N. Haines, Hamish J. Small, Roger Pradel, Remi Choquet, Jeffrey D. Shields
VIMS Articles
Recent increases in emergent infectious diseases have raised concerns about the sustainability of some marine species. The complexity and expense of studying diseases in marine systems often dictate that conservation and management decisions are made without quantitative data on population-level impacts of disease. Mark-recapture is a powerful, underutilized, tool for calculating impacts of disease on population size and structure, even in the absence of etiological information. We applied logistic regression models to mark-recapture data to obtain estimates of disease-associated mortality rates in three commercially important marine species: snow crab (Chionoecetes opilio) in Newfoundland, Canada, that experience sporadic epizootics of bitter …
Vaccine Effects On Heterogeneity In Susceptibility And Implications For Population Health Management, Ke Langwig, Ar Wargo, Dr Jones, Jr Viss, Bj Rutan, Et Al.
Vaccine Effects On Heterogeneity In Susceptibility And Implications For Population Health Management, Ke Langwig, Ar Wargo, Dr Jones, Jr Viss, Bj Rutan, Et Al.
VIMS Articles
Heterogeneity in host susceptibility is a key determinant of infectious disease dynamics but is rarely accounted for in assessment of disease control measures. Understanding how susceptibility is distributed in populations, and how control measures change this distribution, is integral to predicting the course of epidemics with and without interventions. Using multiple experimental and modeling approaches, we show that rainbow trout have relatively homogeneous susceptibility to infection with infectious hematopoietic necrosis virus and that vaccination increases heterogeneity in susceptibility in a nearly all-or-nothing fashion. In a simple transmission model with an R-0 of 2, the highly heterogeneous vaccine protection would cause …
Behavioral Analysis Of Microphallus Turgidus Cercariae In Relation To Microhabitat Of Two Host Grass Shrimp Species (Palaemonetes Spp.), Pa O'Leary, Oj Pung
Behavioral Analysis Of Microphallus Turgidus Cercariae In Relation To Microhabitat Of Two Host Grass Shrimp Species (Palaemonetes Spp.), Pa O'Leary, Oj Pung
VIMS Articles
The behavior of Microphallus turgidus cercariae was examined and compared to microhabitat selection of the second intermediate hosts of the parasite, Palaemonetes spp. grass shrimp. Cercariae were tested for photokinetic and geotactic responses, and a behavioral ethogram was established for cercariae in control and grass shrimp-conditioned brackish water. Photo kinesis trials were performed using a half-covered Petri dish, and geotaxis trials used a graduated cylinder. Both photokinesis and geotaxis trials were performed in lighted and unlighted conditions. In 9 of 10 photokinesis experiments, over half of the cercariae swam horizontally under the covered half of a Petri dish in both …
Replication And Shedding Kinetics Of Infectious Hematopoietic Necrosis Virus In Juvenile Rainbow Trout, Ar Wargo, Rj Scott, B Kerr, G Kurath
Replication And Shedding Kinetics Of Infectious Hematopoietic Necrosis Virus In Juvenile Rainbow Trout, Ar Wargo, Rj Scott, B Kerr, G Kurath
VIMS Articles
Viral replication and shedding are key components of transmission and fitness, the kinetics of which are heavily dependent on virus, host, and environmental factors. To date, no studies have quantified the shedding kinetics of infectious hematopoietic necrosis virus (IHNV) in rainbow trout (Oncorhynchus mykiss), or how they are associated with replication, making it difficult to ascertain the transmission dynamics of this pathogen of high agricultural and conservation importance. Here, the replication and shedding kinetics of two M genogroup IHNV genotypes were examined in their naturally co-evolved rainbow trout host. Within host virus replication began rapidly, approaching maximum values by day …