Effects of dietary mannan oligosaccharides (MOS) on European sea bass (Dicentrarchus labrax) juvenile culture

636927

Effects of dietary conjugated linoleic acid (CLA) on european sea bass (Dicentrarchus labrax) culture

Programa de Doctorado: Acuicultura

Oxidative stress in sea bass (Dicentrarchus labrax) larvae fed on high DHA microdiets. Involvement of several antioxidant nutrients

Programa de Doctorado, Acuicultura: Producción controlada de organismos acuáticos

Mi Addir : hebräische Melodie für eine Singstimme mit Orchester, Piano-Forte, oder Harmonium-Begleitung ; 2 Viol., Viola, Bass, Clarinetto u. 2 Corni

componirt von L. Lewandowski

Practical guide to thorough bass

written by A. F. C. Kollmann

Mus Hs 257 - Generalbaß-Übungen oder Beispiele, nach welchen bei gegebener Oberstimme und Bass mit Ziffern, die Mittelstimmen gefunden werden sollen ; von Bach, Kittel, Dröbs &. &.

[Anonymus]

Sechs deutsche Lieder : für eine Bass- oder Baritonstimme ; mit Begleitung des Pianoforte; 47tes Werk

von Heinr. Marschner

Harmonie-Fest-Messe in Es-Dur : für Sopran, Alt, Tenor ad lib., Bass, Flöte, 2 B-Clarinetten, 1 Flügelhorn in B, 1 Euphonion in B, 2 chrom. Trompeten in Es, 2 Hörner in Es, und Bombardon mit ausgesetzter Orgel als Directions-Stimme obligat ; ferner zur beliebigen Verstärkung bei Aufführungen im Freien 1 Piston in B, 2tes. Flügelhorn in B, Bombardino in B, Posaune und Pauken, nicht obligat ; op. 237

componirt von Johann Obersteiner

Seawater carbonate chemistry and biological parameters during experiments with white sea bass Atractoscion nobilis, 2009

A large fraction of the carbon dioxide added to the atmosphere by human activity enters the sea, causing ocean acidification. We show that otoliths (aragonite ear bones) of young fish grown under high CO2 (low pH) conditions are larger than normal, contrary to expectation. We hypothesize that CO2 moves freely through the epithelium around the otoliths in young fish, accelerating otolith growth while the local pH is controlled. This is the converse of the effect commonly reported for structural biominerals.

European sea bass, Dicentrarchus labrax, in a changing ocean

Ocean acidification, caused by rising concentrations of carbon dioxide (CO2), is widely considered to be a major global threat to marine ecosystems. To investigate the potential effects of ocean acidification on the early life stages of a commercially important fish species, European sea bass (Dicentrarchus labrax), 12 000 larvae were incubated from hatch through metamorphosis under a matrix of two temperatures (17 and 19 °C) and two seawater pCO2 levels (ambient and 1,000 µatm) and sampled regularly for 42 days. Calculated daily mortality was significantly affected by both temperature and pCO2, with both increased temperature and elevated pCO2 associated with lower daily mortality and a significant interaction between these two factors. There was no significant pCO2 effect noted on larval morphology during this period but larvae raised at 19 °C possessed significantly larger eyes and lower carbon:nitrogen ratios at the end of the study compared to those raised under 17 °C. Similarly, when the incubation was continued to post-metamorphic (juvenile) animals (day 67-69), fish raised under a combination of 19 °C and 1000 µatm pCO2 were significantly heavier. However, juvenile D. labrax raised under this combination of 19 °C and 1000 µatm pCO2 also exhibited lower aerobic scopes than those incubated at 19 °C and ambient pCO2. Most studies investigating the effects of near-future oceanic conditions on the early life stages of marine fish have used incubations of relatively short durations and suggested that these animals are resilient to ocean acidification. Whilst the increased survival and growth observed in this study supports this view, we conclude that more work is required to investigate whether the differences in juvenile physiology observed in this study manifest as negative impacts in adult fish.

Combined impacts of elevated CO2 and anthropogenic noise on European sea bass (Dicentrarchus labrax)

Ocean acidification (OA) and anthropogenic noise are both known to cause stress and induce physiological and behavioural changes in fish, with consequences for fitness. OA is also predicted to reduce the ocean's capacity to absorb low-frequency sounds produced by human activity. Consequently, anthropogenic noise could propagate further under an increasingly acidic ocean. For the first time, this study investigated the independent and combined impacts of elevated carbon dioxide (CO2) and anthropogenic noise on the behaviour of a marine fish, the European sea bass (Dicentrarchus labrax). In a fully factorial experiment crossing two CO2 levels (current day and elevated) with two noise conditions (ambient and pile driving), D. labrax were exposed to four CO2/noise treatment combinations: 400 µatm/ambient, 1000 µatm/ambient, 400 µatm/pile-driving, and 1000 µatm/pile driving. Pile-driving noise increased ventilation rate (indicating stress) compared with ambient noise conditions. Elevated CO2 did not alter the ventilation rate response to noise. Furthermore, there was no interaction effect between elevated CO2 and pile-driving noise, suggesting that OA is unlikely to influence startle or ventilatory responses of fish to anthropogenic noise. However, effective management of anthropogenic noise could reduce fish stress, which may improve resilience to future stressors.