scholarly journals Electrosensory prey detection in the African sharptooth catfish, Clarias gariepinus (Clariidae), of a weakly electric mormyrid fish, the bulldog ( Marcusenius macrolepidotus )

2000 ◽  
Vol 48 (3) ◽  
pp. 218-228 ◽  
Author(s):  
S. Hanika ◽  
B. Kramer
Keyword(s):  
Clarias Gariepinus ◽  
Prey Detection ◽  
Mormyrid Fish ◽  
African Sharptooth Catfish ◽  
Weakly Electric

scholarly journals Sensory processing and corollary discharge effects in posterior caudal lobe Purkinje cells in a weakly electric mormyrid fish

2014 ◽  
Vol 112 (2) ◽  
pp. 328-339 ◽  
Author(s):  
Karina Alviña ◽  
Nathaniel B. Sawtell
Keyword(s):  
Purkinje Cells ◽  
Mossy Fiber ◽  
Corollary Discharge ◽  
Electrophysiological Response ◽  
Caudal Lobe ◽  
Mormyrid Fish ◽  
Sensory Structures ◽  
Proprioceptive Inputs ◽  
Weakly Electric ◽  
Complete Account

Although it has been suggested that the cerebellum functions to predict the sensory consequences of motor commands, how such predictions are implemented in cerebellar circuitry remains largely unknown. A detailed and relatively complete account of predictive mechanisms has emerged from studies of cerebellum-like sensory structures in fish, suggesting that comparisons of the cerebellum and cerebellum-like structures may be useful. Here we characterize electrophysiological response properties of Purkinje cells in a region of the cerebellum proper of weakly electric mormyrid fish, the posterior caudal lobe (LCp), which receives the same mossy fiber inputs and projects to the same target structures as the electrosensory lobe (ELL), a well-studied cerebellum-like structure. We describe patterns of simple spike and climbing fiber activation in LCp Purkinje cells in response to motor corollary discharge, electrosensory, and proprioceptive inputs and provide evidence for two functionally distinct Purkinje cell subtypes within LCp. Protocols that induce rapid associative plasticity in ELL fail to induce plasticity in LCp, suggesting differences in the adaptive functions of the two structures. Similarities and differences between LCp and ELL are discussed in light of these results.

Cost-effectiveness, feed utilization and body composition of african sharptooth catfish (Clarias gariepinus, Burchell 1822) fingerlings fed locally formulated and commercial pelleted diets in tarpaulin tanks

2018 ◽  
Vol 26 (1) ◽  
pp. 39-52
Author(s):  
O.E. Afia ◽  
G.S. David
Keyword(s):  
Cost Effectiveness ◽  
Proximate Composition ◽  
Clarias Gariepinus ◽  
Stocking Density ◽  
Food Utilization ◽  
Feed Conversion ◽  
Efficiency Ratio ◽  
Commercial Diet ◽  
Commercial Feed ◽  
African Sharptooth Catfish

Cost-effectiveness, food utilization and proximate composition of Clarias gariepinus fingerlings fed locally formulated (sinking) and commercial (floating) diets in tarpaulin tanks were observed for 56 days. Ninety (90) C. gariepinus fingerlings with initial mean weight (72.99 g ± 3.09) per treatment were observed during the period with three replicates at a stocking density of 15 fish per m2. The fish were fed 5% body weight three times daily. Results showed that C. gariepinus fingerlings fed floating diet had significantly lower (p<0.05) feed conversion ratio (0.83 ± 0.03) than sinking diet (3.23 ± 0.40). Protein efficiency ratio was significantly (p<0.05) higher in fish fed commercial diet (2.69 ± 0.09) than locally formulated (0.80 ± 0.11). Specific growth rate was significantly (p<0.05) higher in floating (3.29 ± 0.07) than sinking diet (0.97 ± 0.20). Incidence cost was lower (₦1,989.65) in fish fed commercial diet than locally formulated (₦3,819.63). The profit index was higher in C. gariepinus fed floating diet (0.74) than sinking (0.19). From these findings, floating (commercial) feed is recommended for feeding C. gariepinus fingerlings since it showed better food utilization, better proximate composition of the carcass, higher profit index and consequently lower incidence cost.Keywords: Clarias gariepinus, cost-effectiveness, sinking feed, floating feed, incidence cost.

scholarly journals Humane slaughter of African sharptooth catfish (Clarias gariepinus): Effects of various stunning methods on brain function

Aquaculture ◽  
2021 ◽  
Vol 531 ◽  
pp. 735887
Author(s):  
J. Brijs ◽  
E. Sundell ◽  
P. Hjelmstedt ◽  
C. Berg ◽  
I. Senčić ◽  
...  
Keyword(s):  
Brain Function ◽  
Clarias Gariepinus ◽  
African Sharptooth Catfish

Effect of light intensity on early ontogeny of African sharptooth catfish,Clarias gariepinus(Burchell)

2016 ◽  
Vol 48 (1) ◽  
pp. 347-355 ◽  
Author(s):  
Markéta Prokešová ◽  
Vlastimil Stejskal ◽  
Jan Matoušek ◽  
Jan Kouřil ◽  
Etienne Baras
Keyword(s):  
Light Intensity ◽  
Clarias Gariepinus ◽  
Early Ontogeny ◽  
African Sharptooth Catfish ◽  
Effect Of Light

Ammonia toxicity and tolerance in the brain of the African sharptooth catfish, Clarias gariepinus

2007 ◽  
Vol 82 (3) ◽  
pp. 204-213 ◽  
Author(s):  
N WEE ◽  
Y TNG ◽  
H CHENG ◽  
S LEE ◽  
S CHEW ◽  
...  
Keyword(s):  
Clarias Gariepinus ◽  
Ammonia Toxicity ◽  
African Sharptooth Catfish ◽  
The Brain

Influence of 17α-ethynylestradiol on CYP1A, GST and biliary FACs responses in male African sharptooth catfish (Clarias gariepinus) exposed to waterborne Benzo[a]Pyrene

Ecotoxicology ◽  
2006 ◽  
Vol 15 (8) ◽  
pp. 629-637 ◽  
Author(s):  
Robinson H. Mdegela ◽  
Marte Braathen ◽  
Dacia Correia ◽  
Resto D. Mosha ◽  
Janneche Utne Skaare ◽  
...  
Keyword(s):  
Clarias Gariepinus ◽  
African Sharptooth Catfish

scholarly journals Gills and skin histopathological evaluation in African sharptooth catfish, Clarias gariepinus exposed to ethanol extract of Adenium obesum stem bark

2015 ◽  
Vol 41 (1) ◽  
pp. 119-127 ◽  
Author(s):  
Samson Eneojo Abalaka ◽  
Muhammad Yakasai Fatihu ◽  
Najume Doguwar Giginya Ibrahim ◽  
Suleiman Folorunsho Ambali
Keyword(s):  
Clarias Gariepinus ◽  
Ethanol Extract ◽  
Stem Bark ◽  
Histopathological Evaluation ◽  
African Sharptooth Catfish

Lower than expected mercury concentration in piscivorous African sharptooth catfish Clarias gariepinus (Burchell)

2007 ◽  
Vol 376 (1-3) ◽  
pp. 134-142 ◽  
Author(s):  
Zerihun Desta ◽  
Reidar Borgstrøm ◽  
Bjørn Olav Rosseland ◽  
Elias Dadebo
Keyword(s):  
Mercury Concentration ◽  
Clarias Gariepinus ◽  
African Sharptooth Catfish
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