Population Characteristics and the Influence of Discharge on Bluehead Sucker and Flannelmouth Sucker

Copeia ◽  
2017 ◽  
Vol 105 (2) ◽  
pp. 375-388
Author(s):  
Zachary B. Klein ◽  
Matthew J. Breen ◽  
Michael C. Quist
Keyword(s):  
Population Characteristics ◽  
Bluehead Sucker ◽  
Flannelmouth Sucker

scholarly journals Gene flow and species delimitation in fishes of Western North America: Flannelmouth (Catostomus latipinnis) and Bluehead sucker (C. Pantosteus discobolus)

2019 ◽  
Author(s):  
Max R. Bangs ◽  
Marlis R. Douglas ◽  
Tyler K. Chafin ◽  
Michael E. Douglas
Keyword(s):  
North America ◽  
Diagnostic Methods ◽  
Assignment Test ◽  
Secondary Contact ◽  
Western North America ◽  
Phylogenetic Species Concept ◽  
Genealogical Concordance ◽  
Bluehead Sucker ◽  
Flannelmouth Sucker ◽  
Analytical Approaches

AbstractThe delimitation of species-boundaries, particularly those obscured by reticulation, is a critical step in contemporary biodiversity assessment. It is especially relevant for conservation and management of indigenous fishes in western North America, represented herein by two species with dissimilar life-histories co-distributed in the highly modified Colorado River (i.e., Flannelmouth Sucker, Catostomus latipinnis; Bluehead Sucker, C. Pantosteus discobolus). To quantify phylogenomic patterns and examine proposed taxonomic revisions, we first employed double-digest restriction-site associated DNA sequencing (ddRAD), yielding 39,755 unlinked SNPs across 139 samples. These were subsequently evaluated with multiple analytical approaches and by contrasting life history data. Three phylogenetic methods and a Bayesian assignment test highlighted similar phylogenomic patterns in each, but with considerable difference in presumed times of divergence. Three lineages were detected in Bluehead Sucker, supporting elevation of C. P. virescens to species-status, and recognizing C. P. discobolus yarrowi (Zuni Bluehead Sucker) as a discrete entity. Admixture in the latter necessitated a reevaluation of its contemporary and historic distributions, underscoring how biodiversity identification can be confounded by complex evolutionary histories. In addition, we defined three separate Flannelmouth Sucker lineages as ESUs (Evolutionarily Significant Units), given limited phenotypic and genetic differentiation, contemporary isolation, and lack of concordance (per the genealogical concordance component of the phylogenetic species concept). Introgression was diagnosed in both species, with the Little Colorado and Virgin rivers in particular. Our diagnostic methods, and the alignment of our SNPs with previous morphological, enzymatic, and mitochondrial work, allowed us to partition complex evolutionary histories into requisite components, such as isolation versus secondary contact.

Retrospective Diagnosis of Pontocerebellar Hypoplasia Type 1B in a Family with Two Deceased Newborn Children

2020 ◽  
Author(s):  
Irena Bradinova ◽  
Silvia Andonova ◽  
Alexey Savov
Keyword(s):  
Clinical Signs ◽  
Final Diagnosis ◽  
Population Based ◽  
Neuromuscular Disorder ◽  
Population Characteristics ◽  
High Risk Population ◽  
Pontocerebellar Hypoplasia ◽  
Clinical Genetic ◽  
Retrospective Diagnosis ◽  
Newborn Children

AbstractPontocerebellar hypoplasia type 1B is a severe autosomal recessive neurologic disorder characterized by a combination of cerebellar and spinal motor neuron degeneration beginning at birth. Pontocerebellar hypoplasia type 1B is caused by mutations in EXOSC3 gene. High prevalence of the p.Gly31Ala mutation was found recently, especially in the Roma ethnic minority. We present a young Bulgarian Roma family with two deceased newborn children manifesting severe neuromuscular disorder including severe muscle weakness, respiratory distress, and multiple joint contractures. Based on the clinical signs and family's population characteristics, DNA testing for the previously described EXOSC3 in Bulgarian Roma mutation c.92G > C; p.Gly31Ala was performed on blood samples of both parents and they were found to be heterozygous carriers. This finding indirectly confirmed the diagnosis of pontocerebellar hypoplasia type B in the deceased offspring. Knowledge of population-specific molecular bases of genetic conditions was the key to final diagnosis in the presented family. Designing of population-based clinical-genetic panels may be a powerful diagnostic tool for patients with such origin. Preconception carrier screening in high-risk population groups is a feasible option to discuss.

Population Characteristics and Feeding of Roach Rutilus rutilus in Small Regulated River of the Kyiv Polissya

2020 ◽  
Vol 56 (1) ◽  
pp. 42-48
Author(s):  
Ye. A. Gupalo ◽  
I. I. Abramyuk ◽  
S. A. Afanasyev ◽  
O. V. Manturova ◽  
Ye. V. Savchenko
Keyword(s):  
Rutilus Rutilus ◽  
Population Characteristics ◽  
Regulated River ◽  
Roach Rutilus Rutilus

Population Characteristics of Mistletoe (Viscum coloratum) in Wandashan Mountain

2013 ◽  
Vol 31 (4) ◽  
pp. 345
Author(s):  
Chang-Bao WANG ◽  
Zeng-Qi XU ◽  
Ren-Jie YUE
Keyword(s):  
Population Characteristics
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