Assessment of sea bass (Dicentrarchus labrax, L.) stock delimitation in the Bay of Biscay and the English Channel based on mark-recapture and genetic data

Abstract Spitz, J., Chouvelon, T., Cardinaud, M., Kostecki, C., and Lorance, P. 2013. Prey preferences of adult sea bass Dicentrarchus labrax in the northeastern Atlantic: implications for bycatch of common dolphin Delphinus delphis – ICES Journal of Marine Science, 70: 452–461. In the northeastern Atlantic, adult sea bass (Dicentrarchus labrax) is one of largest fish living on the shelf, and this species has important commercial value. However, pelagic trawl fisheries that target sea bass have negative operational interactions with common dolphins (Delphinus delphis). Our goal was to determine the diet of adult sea bass in the Bay of Biscay from stomach-content and stable-isotope analyses, and explore the dietary overlap between sea bass and common dolphins. We found that sea bass primarily target small pelagic fish, most notably mackerel (Scomber scombrus), scads (Trachurus spp.), anchovy (Engraulis encrasicolus), and sardine (Sardina pilchardus). These four species also dominated the diets of common dolphins. This overlap in feeding preferences could increase the risk of dolphins being caught by trawl fisheries while feeding among sea bass, and may be an underlying mechanism to explain the high rate of common dolphin bycatch observed in the pelagic trawl fishery for sea bass in the Bay of Biscay. Understanding the foraging ecology and trophic interactions of predator species is an essential step for identifying and resolving management issues in the northeastern Atlantic and other marine ecosystems.

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The influence of oceanographic conditions and larval behaviour on settlement success—the European sea bass Dicentrarchus labrax (L.)

ICES Journal of Marine Science ◽

10.1093/icesjms/fsx195 ◽

2017 ◽

Vol 75 (2) ◽

pp. 455-470 ◽

Cited By ~ 3

Author(s):

Claire Beraud ◽

Johan van der Molen ◽

Mike Armstrong ◽

Ewan Hunter ◽

Leila Fonseca ◽

...

Keyword(s):

Water Temperature ◽

Stock Assessment ◽

Dicentrarchus Labrax ◽

Sea Bass ◽

Conservation Strategies ◽

English Channel ◽

European Sea Bass ◽

Residual Currents ◽

Larval Behaviour ◽

Settlement Success

Abstract The European Seabass (Dicentrarchus labrax) is a slow-growing late maturing fish. The northern stock has been declining since 2010 and is thought to be caused by a combination of fishing and weak year classes. Large inter-annual variation in settlement has been observed, so a better understanding of the mechanisms driving settlement success will aid interpretation of the variation between years, and help to improve the stock assessment models and management strategies. In this study, an individual-based model (IBM) was developed to investigate the factors affecting sea bass settlement on nursery grounds of the northern sea bass stock. The IBM was coupled with hydrodynamics to track particles, whereas egg and larval development, and vertical migration behaviour are fully incorporated. The IBM successfully predicted inter-annual differences in settlement regardless of larval behaviour. The highest settlement success was predicted with neutrally buoyant eggs, hatchlings, and larval stages, in combination with tidal migration at the final larval stage. Dispersal was driven mainly by the influence of wind on residual currents and water temperature, with warmer temperatures reducing the duration of the pelagic phase and stronger current increasing the potential to drift further. Eggs spawned in the central western English Channel settled in both England and France, with movement from the central to the eastern English Channel occurring only in warm years. Larval duration was driven by water temperature and showed an increase in duration from the southwest to northeast areas of the northern stock. The results are discussed in the context of sea bass management and conservation strategies.

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Effect of Long-term Oral Administration of an Immunostimulant Diet on Innate Immunity in Sea Bass (Dicentrarchus labrax)

Journal of Veterinary Medicine Series B ◽

10.1046/j.1439-0450.2000.00412.x ◽

2000 ◽

Vol 47 (10) ◽

pp. 745-751 ◽

Cited By ~ 43

Author(s):

M. Bagni ◽

L. Archetti ◽

M. Amadori ◽

G. Marino

Keyword(s):

Innate Immunity ◽

Oral Administration ◽

Dicentrarchus Labrax ◽

Sea Bass

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MARINE VIBRIOS ASSOCIATED WITH DISEASED SEA BASS (Dicentrarchus labrax) IN TURKEY

Journal of FisheriesSciences com ◽

10.3153/jfscom.2008007 ◽

2008 ◽

Cited By ~ 5

Author(s):

Jale Korun

Keyword(s):

Dicentrarchus Labrax ◽

Sea Bass ◽

Marine Vibrios

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Studies on Prevailing Parasitic Fish Diseases in Pre-mature Cultured Sea bass, Dicentrarchus labrax, Sea bream and Mugil cephalus at Ismailia, Province with Special References to Control

International Journal of Veterinary Science ◽

10.37422/ijvs/20.075 ◽

2020 ◽

Keyword(s):

Parasitic Infection ◽

Dicentrarchus Labrax ◽

Sea Bass ◽

Mugil Cephalus ◽

Sea Bream ◽

Fish Diseases ◽

Total Prevalence ◽

Dark Colour ◽

Gill Filaments ◽

Mature Fish

This study concentrated on the assessment of the prevailing parasitic fish diseases in some marine fishes at Ismailia province and how to control the infestation using microalgae. This study was carried out on 1080 pre-mature fish (360 D. labrax (225±25 g) and 360 S aurata (150±25 g) and 360 M. cephalus (125±25 g) collected from similar ponds of studies to be examined at the end of treatment. In addition to that we followed non-treated fish (1080 premature). The infested fish showed dark colour and respiratory signs. Post mortem lesions were a presence of congestion or paleness and destruction of gill filaments. The total prevalence of infestation was the total prevalence of parasitic infection of non-treated fishes was 45.83 %. The highest percentage was in D. labrax 56.94 % followed by S. aurata 47.22%, the lowest percentage in M. cephalus 33.33. The total prevalence of parasitic infection in premature treated with 2 g algae was 28.79%, followed by 3 g algae was 23.60 %, while the lowest percentage with 5 g algae was 20.37 % respectively. The detected species of parasites were protozoal parasites, Amyloodinium ocellatum and Riboscyphidia in additions of marine monogenea, Lamellodiscus diplodicus isolated from D Labrex, Mugil Cephalus and S aurata. The present study concluded that, the use of microalgae instead of fish meal decreased parasitic infestation in marine fish. The histopathological alteration of natural infested examined fishes was also recorded.

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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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Understanding the Interaction Effects between Dietary Lipid Content and Rearing Temperature on Growth Performance, Feed Utilization, and Fat Deposition of Sea Bass (Dicentrarchus labrax)

Animals ◽

10.3390/ani11020392 ◽

2021 ◽

Vol 11 (2) ◽

pp. 392

Author(s):

Lydia Katsika ◽

Mario Huesca Flores ◽

Yannis Kotzamanis ◽

Alicia Estevez ◽

Stavros Chatzifotis

Keyword(s):

Growth Rate ◽

Body Weight ◽

Specific Growth ◽

Dicentrarchus Labrax ◽

Sea Bass ◽

Dietary Lipid ◽

Lipid Levels ◽

Final Body Weight ◽

Temperature Regimes ◽

Fish Group

This study was conducted to elucidate the interaction effects of temperature and dietary lipid levels (2 × 2 factorial experiment) on the growth performance, muscle, and liver composition in adult farmed European sea bass (Dicentrarchus labrax). Two groups of fish (190 g; 60 fish per group) were distributed in 12 tanks in triplicates and kept at two different temperature regimes; one starting at 23 °C and then changed to 17 °C for 61 days, and the other starting at 17 °C and then changed to 23 °C for 39 days. Two commercial diets containing both ~44% crude protein but incorporating different dietary lipid levels, 16.5% (D16) and 20.0% (D20) (dry matter (DM)), were fed to the fish to apparent satiation; the type of diet fed to each fish group remained constant throughout the experiment. Final body weight, weight gain, and specific growth rate were significantly higher for the fish group held at 23 °C compared to the fish group at 17 °C (before the temperature changes), while the dietary fat content did not have any profound effect in both groups. Furthermore, the different temperature regimes did not affect muscle or liver composition, but, on the contrary, dietary lipids affected hepatosomatic, perivisceral fat, and visceral indexes. Feed conversion ratio and specific growth rate were not affected by the dietary lipid level. An interaction of temperature and dietary lipid content was observed in daily feed consumption (DFC) and final body weight (FBW).

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