scholarly journals Adult and Reparative Neurogenesis in Fish Brain

10.5772/67951 ◽  
2017 ◽  
Author(s):  
Evgeniya V. Pushchina ◽  
Anatoly A. Varaksin ◽  
Mariya E. Stukaneva ◽  
Eva I. Zharikova
Keyword(s):  
Fish Brain ◽  
Reparative Neurogenesis

scholarly journals The long-chain fatty acid receptors FFA1 and FFA4 are involved in food intake regulation in fish brain

2020 ◽  
Vol 223 (17) ◽  
pp. jeb227330
Author(s):  
Cristina Velasco ◽  
Marta Conde-Sieira ◽  
Sara Comesaña ◽  
Mauro Chivite ◽  
Adrián Díaz-Rúa ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Free Fatty Acid ◽  
Food Intake ◽  
Mrna Abundance ◽  
Fish Brain ◽  
Protein Levels ◽  
Food Intake Regulation ◽  
Free Fatty Acid Receptors ◽  
Intake Regulation ◽  
Long Chain

ABSTRACTWe hypothesized that the free fatty acid receptors FFA1 and FFA4 might be involved in the anorectic response observed in fish after rising levels of long-chain fatty acids (LCFAs) such as oleate. In one experiment we demonstrated that intracerebroventricular (i.c.v.) treatment of rainbow trout with FFA1 and FFA4 agonists elicited an anorectic response 2, 6 and 24 h after treatment. In a second experiment, the same i.c.v. treatment resulted after 2 h in an enhancement in the mRNA abundance of anorexigenic neuropeptides pomca1 and cartpt and a decrease in the values of orexigenic peptides npy and agrp1. These changes occurred in parallel with those observed in the mRNA abundance and/or protein levels of the transcription factors Creb, Bsx and FoxO1, protein levels and phosphorylation status of Ampkα and Akt, and mRNA abundance of plcb1 and itrp3. Finally, we assessed in a third experiment the response of all these parameters after 2 h of i.c.v. treatment with oleate (the endogenous ligand of both free fatty acid receptors) alone or in the presence of FFA1 and FFA4 antagonists. Most effects of oleate disappeared in the presence of FFA1 and FFA4 antagonists. The evidence obtained supports the involvement of FFA1 and FFA4 in fatty acid sensing in fish brain, and thus involvement in food intake regulation through mechanisms not exactly comparable (differential response of neuropeptides and cellular signalling) to those known in mammals.

scholarly journals Colourfulness as a possible measure of object proximity in the larval zebrafish brain

2020 ◽  
Author(s):  
Philipp Bartel ◽  
Filip K Janiak ◽  
Daniel Osorio ◽  
Tom Baden
Keyword(s):  
Dynamic Range ◽  
Red Light ◽  
Visible Spectrum ◽  
Visual Ecology ◽  
Neural Representation ◽  
Spectral Tuning ◽  
Fish Brain ◽  
Visual Neurons ◽  
Zebrafish Brain ◽  
Larval Zebrafish

The encoding of light increments and decrements by separate On- and Off- systems is a fundamental ingredient of vision, which supports the detection of edges in space and time and makes efficient use of limited dynamic range of visual neurons [1]. Theory predicts that the neural representation of On- and Off-signals should be approximately balanced, including across an animals’ full visible spectrum. Here we find that larval zebrafish violate this textbook expectation: in the fish brain, UV-stimulation near exclusively gives On-responses, blue/green-stimulation mostly Off- responses, and red-light alone elicits approximately balanced On- and Off-responses (see also [2–4]). We link these findings to zebrafish visual ecology, and suggest that the observed spectral tuning boosts the encoding of object “colourfulness”, which correlates with object proximity in their underwater world [5].

Fish: Brain food

1944 ◽  
Vol 186 (5) ◽  
pp. 123-123
Author(s):  
D. B.
Keyword(s):  
Fish Brain

Investigation on the validity of 3D micro-CT imaging in the fish brain

2019 ◽  
Vol 328 ◽  
pp. 108416
Author(s):  
Shingo Udagawa ◽  
Keitaro Miyara ◽  
Hiroki Takekata ◽  
Yuki Takeuchi ◽  
Akihiro Takemura
Keyword(s):  
Ct Imaging ◽  
Micro Ct ◽  
Fish Brain

Occurrence of N-acylethanolamine phospholipids in fish brain and spinal cord

1985 ◽  
Vol 835 (3) ◽  
pp. 426-433 ◽  
Author(s):  
Viswanathan Natarajan ◽  
Patricia C. Schmid ◽  
Padala V. Reddy ◽  
Mary Lou Zuzarte-Augustin ◽  
Harald H.O. Schmid
Keyword(s):  
Spinal Cord ◽  
Fish Brain ◽  
Brain And Spinal Cord

Elemental mapping inventory of the fish Liza aurata brain: a biomarker of metal pollution vulnerability

Metallomics ◽  
2015 ◽  
Vol 7 (2) ◽  
pp. 277-282
Author(s):  
Rita M. Godinho ◽  
Patricia Pereira ◽  
Joana Raimundo ◽  
Mário Pacheco ◽  
Teresa Pinheiro
Keyword(s):  
Blood Brain Barrier ◽  
Metal Pollution ◽  
Brain Barrier ◽  
Elemental Mapping ◽  
Fish Brain ◽  
Neurological Toxicity ◽  
Liza Aurata ◽  
Elemental Concentrations ◽  
Blood Brain

Elemental mapping of fish brain exposed to metal pollution revealed altered elemental concentrations that highlight homeostasis modification, altered permeability of the blood–brain barrier and risk for neurological toxicity and behaviour impairments.

What are the functions of fish brain pallium?

2009 ◽  
Vol 79 (6) ◽  
pp. 436-440 ◽  
Author(s):  
Juan Pedro Vargas ◽  
Juan Carlos López ◽  
Manuel Portavella
Keyword(s):  
Fish Brain
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