Pre-anthropocene mercury residues in North American freshwater fish

2014 ◽  
Vol 10 (2) ◽  
pp. 299-308 ◽  
Author(s):  
Bruce K Hope ◽  
Jeff Louch
Keyword(s):  
Freshwater Fish ◽  
North American ◽  
North American Freshwater ◽  
North American Freshwater Fish

Estimating thermal response metrics for North American freshwater fish using Bayesian phylogenetic regression

2018 ◽  
Vol 75 (11) ◽  
pp. 1878-1885 ◽  
Author(s):  
Sarah S. Hasnain ◽  
Michael D. Escobar ◽  
Brian J. Shuter
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
North American ◽  
Thermal Response ◽  
Estimation Accuracy ◽  
Freshwater Fish Species ◽  
Optimum Growth Temperature ◽  
North American Freshwater ◽  
North American Freshwater Fish ◽  
Phylogenetic Regression

Physiological performance in fish peaks within a well-defined range of temperatures, which is distinct for each species. Species-specific thermal responses for growth, survival, and reproduction are most commonly quantified directly through laboratory experiment or field observation, with a focus on six specific metrics: optimum growth temperature and final temperature preferendum (growth), upper incipient lethal temperature and critical thermal maximum (survival), and optimum spawning temperature and optimum egg development temperature (reproduction). These values remain unknown for many North American freshwater fish species. In this paper, we present a new statistical method (Bayesian phylogenetic regression) that uses relationships between these metrics and phenetic relatedness to estimate unknown metric values. The reliability of these estimates was compared with those derived from models incorporating taxonomic family and models without any taxonomic information. Overall, incorporating taxonomic family relatedness improved estimation accuracy across all metrics. For Salmonidae and Cyprinidae, estimates derived from Bayesian phylogenetic regression typically had the highest expected reliability. We used our methods to generate 274 estimates of unknown metric values for over 100 North American freshwater fish species.

Phylogeny influences the relationships linking key ecological thermal metrics for North American freshwater fish species

2013 ◽  
Vol 70 (7) ◽  
pp. 964-972 ◽  
Author(s):  
Sarah S. Hasnain ◽  
Brian J. Shuter ◽  
Charles K. Minns
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
North American ◽  
Thermal Sensitivity ◽  
Thermal Response ◽  
Optimal Growth ◽  
Individual Performance ◽  
Freshwater Fish Species ◽  
North American Freshwater ◽  
North American Freshwater Fish

Habitat temperature is a major determinant of performance and activity in fish. We summarize published studies of 173 North American freshwater fish species to examine the interrelationships among thermal response metrics associated with three types of individual performance: growth (optimal growth temperature (OGT), final temperature preferendum (FTP)), survival (upper incipient lethal temperature (UILT), critical thermal maximum (CTMax)), and reproduction (optimum spawning temperature (OS), optimum egg development temperature (OE)). We found that all metrics were highly correlated, especially those associated with a specific performance type. Differences in thermal metrics were also significantly linked to traditional thermal guild classifications, spawning season, and strategy. We found an overall decline in correlation strength when we used phylogenetically independent contrasts to control for the effect of phylogeny. This decline was much greater for growth and survival metrics than for reproduction. This suggests that the role of evolutionary history in determining thermal sensitivity at the species level varies greatly across the range of performance types that can be used to characterize the behaviour of an individual.

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