Effects of dietary taurine level on visual function in European sea bass (Dicentrarchus labrax)

AbstractDietary insufficiencies have been well documented to decrease growth rates and survival (and therefore overall production) in fish aquaculture. By contrast, the effects of dietary insufficiencies on the sensory biology of cultured fish remains largely unstudied. Diets based solely on plant protein sources could have advantages over fish-based diets, because of the cost and ecological effects of the latter, but lack the amino acid taurine. Adequate levels of taurine are, however, necessary for the development of a fully functional visual system in mammals. As part of ongoing studies to determine the suitability of plant-based diets, we investigated the effects of normal and reduced taurine dietary levels on retinal anatomy and function in European sea bass (Dicentrarchus labrax). We could not demonstrate any effects of dietary taurine level on retinal anatomy, nor the functional properties of luminous sensitivity or temporal resolution (measured as flicker fusion frequency). We did, however, find an effect on spectral sensitivity. The peak of spectral sensitivity of individuals fed a 5% taurine diet was rightward shifted (i.e., towards longer wavelengths) relative to that of fish fed a 0% or 1.5 % taurine diet. This difference in in spectral sensitivity was due to a relatively lower level of middle wavelength pigment (maximum absorbance ≈500 nm) in fish fed a 5% taurine diet. Changes in spectral sensitivity resulting from diets containing different taurine levels are unlikely to be detrimental to fish destined for market but could be in fishes that are being reared for stock enhancement programs.

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Vaccination of European sea bass Dicentrarchus labrax with avirulent Mycobacterium marinum (iipA::kan mutant)

Fish & Shellfish Immunology ◽

10.1016/j.fsi.2019.04.057 ◽

2019 ◽

Vol 90 ◽

pp. 317-327 ◽

Cited By ~ 1

Author(s):

Shay Ravid-Peretz ◽

Angelo Colorni ◽

Galit Sharon ◽

Michal Ucko

Keyword(s):

Dicentrarchus Labrax ◽

Sea Bass ◽

Mycobacterium Marinum ◽

European Sea Bass

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Cortisol concentration in scales is a valid indicator for the assessment of chronic stress in European sea bass, Dicentrarchus labrax L

Aquaculture ◽

10.1016/j.aquaculture.2021.737257 ◽

2021 ◽

pp. 737257

Author(s):

A. Samaras ◽

A. Dimitroglou ◽

S. Kollias ◽

G. Skouradakis ◽

I.E. Papadakis ◽

...

Keyword(s):

Chronic Stress ◽

Dicentrarchus Labrax ◽

Sea Bass ◽

Cortisol Concentration ◽

European Sea Bass

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Cellular alterations in different organs of European sea bass Dicentrarchus labrax (L.) exposed to cadmium

Chemosphere ◽

10.1016/j.chemosphere.2006.10.061 ◽

2007 ◽

Vol 67 (6) ◽

pp. 1171-1181 ◽

Cited By ~ 83

Author(s):

L. Giari ◽

M. Manera ◽

E. Simoni ◽

B.S. Dezfuli

Keyword(s):

Dicentrarchus Labrax ◽

Sea Bass ◽

European Sea Bass ◽

Cellular Alterations

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Developmental expression of three different prepro-GnRH (Gonadotrophin-releasing hormone) messengers in the brain of the European sea bass (Dicentrarchus labrax)

Journal of Chemical Neuroanatomy ◽

10.1016/s0891-0618(02)00004-2 ◽

2002 ◽

Vol 23 (4) ◽

pp. 255-267 ◽

Cited By ~ 44

Author(s):

David González-Martı́nez ◽

Nilli Zmora ◽

Silvia Zanuy ◽

Carmen Sarasquete ◽

Abigail Elizur ◽

...

Keyword(s):

Dicentrarchus Labrax ◽

Sea Bass ◽

Developmental Expression ◽

European Sea Bass ◽

Releasing Hormone ◽

Gonadotrophin Releasing Hormone ◽

The Brain

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Morphology of the european sea bass (dicentrarchus labrax) tongue

Microscopy Research and Technique ◽

10.1002/jemt.21105 ◽

2011 ◽

Vol 75 (5) ◽

pp. 643-649 ◽

Cited By ~ 15

Author(s):

Francesco Abbate ◽

Maria Cristina Guerrera ◽

Giuseppe Montalbano ◽

Felix De Carlos ◽

Alberto Álvarez Suárez ◽

...

Keyword(s):

Dicentrarchus Labrax ◽

Sea Bass ◽

European Sea Bass

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Analysis of the Sox gene family in the European sea bass (Dicentrarchus labrax)

Comparative Biochemistry and Physiology Part B Biochemistry and Molecular Biology ◽

10.1016/j.cbpc.2003.12.002 ◽

2004 ◽

Vol 137 (2) ◽

pp. 279-284 ◽

Cited By ~ 22

Author(s):

Malyka Galay-Burgos ◽

Lynda Llewellyn ◽

Constantinos C Mylonas ◽

Adelino V.M Canario ◽

Silvia Zanuy ◽

...

Keyword(s):

Gene Family ◽

Dicentrarchus Labrax ◽

Sea Bass ◽

European Sea Bass ◽

Sox Gene

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Antioxidant Activities and Selenogene Transcription in the European Sea Bass (Dicentrarchus labrax) Liver Depend, in a Non-linear Manner, on the Se/Hg Molar Ratio of the Feeds

Biological Trace Element Research ◽

10.1007/s12011-021-02835-7 ◽

2021 ◽

Author(s):

Marinelle Espino ◽

Harkaitz Eguiraun ◽

Oihane Diaz de Cerio ◽

José Antonio Carrero ◽

Nestor Etxebarria ◽

...

Keyword(s):

Antioxidant Activities ◽

Dicentrarchus Labrax ◽

Thioredoxin Reductase ◽

Sea Bass ◽

Molar Ratio ◽

Antioxidant Systems ◽

European Sea Bass ◽

Thioredoxin System ◽

Non Linear ◽

Linear Manner

AbstractFeeding 3.9 and 6.7 mg Hg/kg (Se/Hg molar ratios of 0.8 and 0.4, respectively) for 14 days negatively affected Dicentrarchus labrax growth and total DNTB- and thioredoxin-reductase (TrxR) activities and the transcription of four redox genes (txn1, gpx1, txnrd3, and txnrd2) in the liver, but a diet with 0.5 mg Hg/kg (Se/Hg molar ratio 6.6) slightly increased both reductase activities and the transcription of txn1, gpx1, and txnrd2. Feeding 6.7 mg Hg/kg for 53 days downregulated the genes of the thioredoxin system (txn1, txnrd3, and txnrd2) but upregulated gpx1, confirming the previously proposed complementarity among the antioxidant systems. Substitution of 20% of the feed by thawed white fish (hake) slightly counteracted the negative effects of Hg. The effects were not statistically significant and were dependent, in a non-linear manner, on the Se/Hg molar ratio of the feed but not on its Hg concentration. These results stress the need to consider the Se/Hg molar ratio of the feed/food when evaluating the toxicity of Hg.

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