Identification of sea bass (Dicentrarchus labrax) nursery areas in the north-western Mediterranean Sea

2009 ◽  
Vol 89 (7) ◽  
pp. 1367-1374 ◽  
Author(s):  
V. Dufour ◽  
M. Cantou ◽  
F. Lecomte
Keyword(s):  
Coastal Lagoons ◽  
Dicentrarchus Labrax ◽  
Sea Bass ◽  
Western Mediterranean ◽  
Mediterranean Coast ◽  
European Sea Bass ◽  
Nursery Areas ◽  
The North ◽  
Western Mediterranean Sea ◽  
Gulf Of Lion

Nursery areas of European sea bass (Dicentrarchus labrax, L.) were investigated from spring 2005 to summer 2006 in areas along the French Mediterranean coast of the Gulf of Lion. Nurseries were identified by the presence of settling individuals of sea bass and young juveniles. These nurseries represent different types of sheltered shallow habitats, both natural such as coastal lagoons, estuaries, and artificial such as marinas. Settlement occurred from April to June during both years. The number of settling individuals varied between sites from just a few individuals to several thousand. In one given site, settlement also varied between 2005 and 2006. The size distribution of sampled individuals revealed that several pulses arrived in each nursery. At this stage, sea bass already exhibited a strong orientation capacity but a limited swimming ability. The magnitude of sea bass settlement in marinas requires better environmental management of such artificial areas.

scholarly journals Migrations, fishery interactions, and management units of sea bass (Dicentrarchus labrax) in Northwest Europe

2007 ◽  
Vol 64 (2) ◽  
pp. 332-345 ◽  
Author(s):  
M. G. Pawson ◽  
G. D. Pickett ◽  
J. Leballeur ◽  
M. Brown ◽  
M. Fritsch
Keyword(s):  
Dicentrarchus Labrax ◽  
Release Site ◽  
Sea Bass ◽  
European Sea Bass ◽  
Management Units ◽  
The North ◽  
Management Measures ◽  
Northwest Europe ◽  
Fishery Interactions ◽  
The Uk

Abstract Pawson, M. G., Pickett, G. D., Leballeur, J. Brown, M., and Fritsch, M. 2007. Migrations, fishery interactions, and management units of sea bass (Dicentrarchus labrax) in Northwest Europe. – ICES Journal of Marine Science, 64: 332–345. A total of 4959 sea bass was tagged between 2000 and 2005 around the coasts of England, Wales, southern Ireland, and the Channel Isles to investigate whether movement patterns documented in 1987 have changed and to estimate the level of competition for sea bass between inshore and offshore fisheries. Most (54%) of the recaptures of adult bass (fish >40 cm) tagged inshore and made between May and October were within 16 km of the release positions. From November on, an increasing proportion was recaptured at least 80 km south or southwest of tagging sites. Bass tagged on offshore spawning grounds in March and April showed reciprocal movement, 75% of recaptures between May and October being at least 80 km from the release site. These observations reaffirm the hypothesis that adult sea bass may move considerable distances to offshore winter spawning areas, but there was little evidence of the spawning migrations between the North Sea and the western Channel that were observed in the early 1980s. Just 3% of the recaptures of bass >36 cm tagged in UK inshore fisheries were reported from the offshore pairtrawl fishery, whereas half the recaptures of bass tagged in that fishery were made inshore along the UK coast. When weighted by the respective catches, this suggests that the effects of management measures implemented in the UK inshore fishery are largely restricted to that fishery. A proposal for stock units for assessment and management of NW European sea bass fisheries is presented.

scholarly journals Migration, residency, and homing of bluefin tuna in the western Mediterranean Sea

2013 ◽  
Vol 71 (3) ◽  
pp. 510-518 ◽  
Author(s):  
Jean-Marc Fromentin ◽  
Daniel Lopuszanski
Keyword(s):  
Mediterranean Sea ◽  
Spatial Dynamics ◽  
Bluefin Tuna ◽  
Western Mediterranean ◽  
Careful Consideration ◽  
Mediterranean Coast ◽  
Central Mediterranean ◽  
The North ◽  
Western Mediterranean Sea ◽  
Local Enrichment

Abstract This study presents the results of an electronic tagging programme on mature Atlantic bluefin tuna (ABFT) that has been conducted since 2007 offshore of the French Mediterranean Coast. The spatial distributions of ABFT showed little year-to-year variation and the fish concentrated in a small area of the central northwestern Mediterranean, where they may stay for several months. The individual tracks display sinuous trajectories in this area, indicating the possibility of feeding behaviour. No fish went out to the North Atlantic, but several fish displayed some migration to the southern western Mediterranean Sea during winter and the central Mediterranean during the spawning season. The homing behaviour of one fish after a full year as well as the back and forth of several fish further indicates that this restricted feeding area is probably persistent from year to year. We hypothesize that this area could result from local enrichment due to permanent mesoscale oceanographic features related to the North Mediterranean Current and the North Balearic front. The option of a spatial management, through marine protected areas, for a highly migratory species, such as ABFT, thus deserves more careful consideration because those species displayed complex spatial dynamics (e.g. homing), and population structure (e.g. several subpopulations of different sizes).

scholarly journals Ceratothoa oestroides Infection in European Sea Bass: Revealing a Long Misunderstood Relationship

2021 ◽  
Vol 12 ◽  
Author(s):  
M. Carla Piazzon ◽  
Ivona Mladineo ◽  
Ron P. Dirks ◽  
Elena Santidrián Yebra-Pimentel ◽  
Jerko Hrabar ◽  
...  
Keyword(s):  
Feeding Strategy ◽  
Dicentrarchus Labrax ◽  
Head Kidney ◽  
Sea Bass ◽  
Growth Delay ◽  
European Sea Bass ◽  
Feeding Site ◽  
Collagen Formation ◽  
North East ◽  
The North

Ceratothoa oestroides (Cymothoidea, Isopoda) is a generalist crustacean parasite that negatively affects the economic sustainability of European sea bass (Dicentrarchus labrax) aquaculture in the North-East Mediterranean. While mortalities are observed in fry and fingerlings, infection in juvenile and adult fish result in approximately 20% growth delay. A transcriptomic analysis (PCR array, RNA-Seq) was performed on organs (tongue, spleen, head kidney, and liver) from infected vs. Ceratothoa-free sea bass fingerlings. Activation of local and systemic immune responses was detected, particularly in the spleen, characterized by the upregulation of cytokines (also in the tongue), a general reshaping of the immunoglobulin (Ig) response and suppression of T-cell mediated responses. Interestingly, starvation and iron transport and metabolism genes were strongly downregulated, suggesting that the parasite feeding strategy is not likely hematophagous. The regulation of genes related to growth impairment and starvation supported the growth delay observed in infected animals. Most differentially expressed (DE) transcripts were exclusive of a specific organ; however, only in the tongue, the difference between infected and uninfected fish was significant. At the attachment/feeding site, the pathways involved in muscle contraction and intercellular junction were the most upregulated, whereas the pathways involved in fibrosis (extracellular matrix organization, collagen formation, and biosynthesis) were downregulated. These results suggest that parasite-inflicted damage is successfully mitigated by the host and characterized by regenerative processes that prevail over the reparative ones.

scholarly journals Sea surface temperature variability in the North Western Mediterranean Sea (Gulf of Lion) during the Common Era

2016 ◽  
Vol 456 ◽  
pp. 124-133 ◽  
Author(s):  
Marie-Alexandrine Sicre ◽  
Bassem Jalali ◽  
Belen Martrat ◽  
Sabine Schmidt ◽  
Maria-Angela Bassetti ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Mediterranean Sea ◽  
Western Mediterranean ◽  
Sea Surface ◽  
The North ◽  
Western Mediterranean Sea ◽  
Gulf Of Lion ◽  
The Common ◽  
Common Era ◽  
North Western

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

2019 ◽  
Vol 90 ◽  
pp. 317-327 ◽  
Author(s):  
Shay Ravid-Peretz ◽  
Angelo Colorni ◽  
Galit Sharon ◽  
Michal Ucko
Keyword(s):  
Dicentrarchus Labrax ◽  
Sea Bass ◽  
Mycobacterium Marinum ◽  
European Sea Bass

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

Aquaculture ◽  
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

scholarly journals Dynamical Downscaling of ERA5 Data on the North-Western Mediterranean Sea: From Atmosphere to High-Resolution Coastal Wave Climate

2021 ◽  
Vol 9 (2) ◽  
pp. 208
Author(s):  
Valentina Vannucchi ◽  
Stefano Taddei ◽  
Valerio Capecchi ◽  
Michele Bendoni ◽  
Carlo Brandini
Keyword(s):  
Mediterranean Sea ◽  
Wind Wave ◽  
Dynamical Downscaling ◽  
Wave Climate ◽  
Western Mediterranean ◽  
Limited Area ◽  
Computational Domain ◽  
Wave Hindcast ◽  
The North ◽  
Western Mediterranean Sea

A 29-year wind/wave hindcast is produced over the Mediterranean Sea for the period 1990–2018. The dataset is obtained by downscaling the ERA5 global atmospheric reanalyses, which provide the initial and boundary conditions for a numerical chain based on limited-area weather and wave models: the BOLAM, MOLOCH and WaveWatch III (WW3) models. In the WW3 computational domain, an unstructured mesh is used. The variable resolutions reach up to 500 m along the coasts of the Ligurian and Tyrrhenian seas (Italy), the main objects of the study. The wind/wave hindcast is validated using observations from coastal weather stations and buoys. The wind validation provides velocity correlations between 0.45 and 0.76, while significant wave height correlations are much higher—between 0.89 and 0.96. The results are also compared to the original low-resolution ERA5 dataset, based on assimilated models. The comparison shows that the downscaling improves the hindcast reliability, particularly in the coastal regions, and especially with regard to wind and wave directions.

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

Chemosphere ◽  
2007 ◽  
Vol 67 (6) ◽  
pp. 1171-1181 ◽  
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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