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

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.

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Estimating discard survival of European sea bass ( Dicentrarchus labrax ) in the UK commercial hook‐and‐line fishery

Fisheries Management and Ecology ◽

10.1111/fme.12518 ◽

2021 ◽

Author(s):

Philip D Lamb ◽

Peter Randall ◽

Marc Simon Weltersbach ◽

Barnaby Andrews ◽

Kieran Hyder

Keyword(s):

Dicentrarchus Labrax ◽

Sea Bass ◽

European Sea Bass ◽

The Uk

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

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315409000368 ◽

2009 ◽

Vol 89 (7) ◽

pp. 1367-1374 ◽

Cited By ~ 30

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.

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Observations of the Behaviour of European Sea Bass (Dicentrarchus labrax) in the North Sea

Reviews: Methods and Technologies in Fish Biology and Fisheries - Tagging and Tracking of Marine Animals with Electronic Devices ◽

10.1007/978-1-4020-9640-2_7 ◽

2009 ◽

pp. 103-119 ◽

Cited By ~ 6

Author(s):

V.A. Quayle ◽

D. Righton ◽

S. Hetherington ◽

G. Pickett

Keyword(s):

North Sea ◽

Dicentrarchus Labrax ◽

Sea Bass ◽

European Sea Bass ◽

The North ◽

The North Sea

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

Frontiers in Immunology ◽

10.3389/fimmu.2021.645607 ◽

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.

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