Corrigenda — standard assumptions for biogeographica analysis

1991 ◽  
Vol 4 (1) ◽  
pp. 41 ◽  
Author(s):  
G Nelson ◽  
P Ladiges
Keyword(s):  
Freshwater Fish ◽  
North American ◽  
Freshwater Fishes ◽  
Component Analysis ◽  
Parsimony Analysis ◽  
Widespread Species ◽  
North American Freshwater ◽  
Analytical Protocol ◽  
Spurious Results

Reanalysis of Mayden's data on distribution and relationships of North American freshwater fishes reveals weaknesses of the analytical protocol termed Brooks' Parsimony Analysis (BPA). Standard assumptions 2, 1, and 0 are explored with reference to suites of 3-area statements contained in cladograms of species. Component analysis proved effective for all assumptions for the freshwater fish data whereas BPA yielded results not optimal for any assumption. For Rosen's data on Heterandria and Xiphophoms, component analysis proved effective for assumption 2 whereas results from other methods proved effective for assumptions 1 and 0. Analysis of widespread species indicates that, when they are used to build area cladograms, they cause spurious results. Assumptions 1 and 0 are sensitive to these spurious effects.

Standard assumptions for biogeographica analysis

1991 ◽  
Vol 4 (1) ◽  
pp. 41
Author(s):  
G Nelson ◽  
P Ladiges
Keyword(s):  
Freshwater Fish ◽  
North American ◽  
Freshwater Fishes ◽  
Component Analysis ◽  
Parsimony Analysis ◽  
Widespread Species ◽  
North American Freshwater ◽  
Analytical Protocol ◽  
Spurious Results

Reanalysis of Mayden's data on distribution and relationships of North American freshwater fishes reveals weaknesses of the analytical protocol termed Brooks' Parsimony Analysis (BPA). Standard assumptions 2, 1, and 0 are explored with reference to suites of 3-area statements contained in cladograms of species. Component analysis proved effective for all assumptions for the freshwater fish data whereas BPA yielded results not optimal for any assumption. For Rosen's data on Heterandria and Xiphophoms, component analysis proved effective for assumption 2 whereas results from other methods proved effective for assumptions 1 and 0. Analysis of widespread species indicates that, when they are used to build area cladograms, they cause spurious results. Assumptions 1 and 0 are sensitive to these spurious effects.

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.

Characterization of elasticity patterns of North American freshwater fishes

2006 ◽  
Vol 63 (9) ◽  
pp. 2050-2066 ◽  
Author(s):  
Luis A Vélez-Espino ◽  
Michael G Fox ◽  
Robert L McLaughlin
Keyword(s):  
Population Growth ◽  
North American ◽  
Growth Rates ◽  
Freshwater Fishes ◽  
Adult Survival ◽  
Juvenile Survival ◽  
Vital Rates ◽  
Population Growth Rates ◽  
North American Freshwater ◽  
Trade Offs

We applied elasticity analysis to 88 North American freshwater fishes to assess the relative impacts of changes in the vital rates on asymptotic population growth. Variance in vital rates was summarized for four distinct functional groups: (i) species with population growth rates strongly sensitive to perturbations in adult survival; (ii) species with population growth rates sensitive to perturbations in overall survival; (iii) species with population growth rates most sensitive to perturbations in juvenile survival; and (iv) species with population growth rates sensitive to perturbations in juvenile survival and fecundity. The results of the present study also showed that (a) elasticity patterns cannot be inferred in a straightforward manner from trade-offs between life-history traits, (b) the sensitivity of a population's growth rate to changes in adult survival and fecundity can be predicted empirically from life span and age at maturity, respectively, (c) elasticities are highly conserved among genera within the same taxonomic family, and (d) there are key divergences between elasticity patterns of freshwater fish and other vertebrate taxa.

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