Explaining Channel Catfish Population Characteristics in Ohio Reservoirs

2021 ◽  
Author(s):  
Stephen M. Tyszko ◽  
Jeremy J. Pritt ◽  
Joseph D. Conroy
Keyword(s):  
Channel Catfish ◽  
Population Characteristics

Conservation, Ecology, and Management of Catfish: The Second International Symposium

2011 ◽  
Keyword(s):  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Size Structure ◽  
Prey Availability ◽  
Relative Weight ◽  
Negative Influence ◽  
River Channel ◽  
Population Characteristics ◽  
Current Status ◽  
Platte River

<em>Abstract</em>.—Catfish angling is popular throughout North America and catfish are the most sought after fish species in the Platte River, Nebraska. However, catfish management in the Platte River is minimal as little is known about current populations. Our objective was to determine the current status of channel catfish <em>Ictalurus punctatus</em> populations in the central and lower Platte River. Specifically, we evaluated population characteristics including relative abundance, size structure and condition. The current Platte River channel catfish population appears to be comparable to many Midwestern rivers. Channel catfish populations in the central Platte River had lower relative abundances (CPUE [catch per unit effort] = 1.1 ± 0.2 versus 2.3 ± 0.2 fish/net-night using 25-mm hoop nets), higher condition (<em>W<sub>r</sub></em> [relative weight] = 92 ± 1.7 versus 83 ± 0.7 using all gears) and greater size structure (PSD [proportional size distribution] = 35 ± 7 versus 24 ± 3 using all gears) compared to lower Platte River channel catfish. Possible factors influencing differences in channel catfish population characteristics are prey availability, flow modifications, habitat characteristics, and angler exploitation. Water manipulation from the Loup River Power Canal was also identified as a possible negative influence on lower Platte River channel catfish populations because hydropeaking is likely creating a stressful environment. However, channel catfish in the central Platte River may have benefited from recent high flows that likely increased productivity and food availability in the central Platte River.

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
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