Consulta: creatorFacets:"Mahé, Kelig"
Registros recuperados: 6
Data/hora: 03/06/2024 18:54:50

Complementarity and discriminatory power of genotype and otolith shape in describing the fine-scale population structure of an exploited fish, the common sole of the Eastern English Channel
Provedor de dados: 5
Autores: Randon, Marine; Le Pape, Olivier; Ernande, Bruno; Mahé, Kelig; Volckaert, Filip A. M.; Petit, Eric; Lassalle, Gilles; Le Berre, Thomas; Réveillac, Elodie.
Marine organisms show population structure at a relatively fine spatial scale, even in open habitats. The tools commonly used to assess subtle patterns of connectivity have diverse levels of resolution and can complement each other to inform on population structure. We assessed and compared the discriminatory power of genetic markers and otolith shape to reveal the population structure on evolutionary and ecological time scales of the common sole (Solea solea), living in the Eastern English Channel (EEC) stock off France and the UK. First, we genotyped fish with Single Nucleotide Polymorphisms to assess population structure at an evolutionary scale. Then, we tested for spatial segregation of the subunits using otolith shape as an integrative tracer of life...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00658/77009/78266.pdf

Age, growth and mortality of the striped seabream   Lithognathus mormyrus   (Linnaeus, 1758) in the Gulf of Tunis (Central Mediterranean Sea)
Provedor de dados: 5
Autores: Khaldi, Asma; Chater, Ines; Elleboode, Romain; Mahé, Kelig; Chakroun-marzouk, Nadia.
Despite the high commercial value of the striped seabream Lithognathus mormyrus (Linnaeus, 1758) in the Gulf of Tunis, biological data on its age, growth and exploitation rate are lacking. With the aim of estimating growth parameters, 516 individuals, ranging from 6–27.5 cm total length and from 3.5–293.5 g total weight, were collected from the artisanal fishing fleet between February 2014 and July 2016. The somatic growth presented a positive allometry and was described by the equation TW = 6.54 10−3TL3.213. The monthly analysis of the marginal increment of the otoliths revealed that only one annulus was deposited per year. The estimated von Bertalanffy growth parameters were: L∞ = 30.18 cm, k = 0.303 year−1 and t0 = −1.42 years. Total and natural...
Tipo: Text
Palavras-chave: Age; Growth; Gulf of Tunis; Lithognathus mormyrus; Lopt; Mortality; Otolithometry; Sparidae; Weight–length relationship.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00676/78770/80945.pdf

Do environmental conditions (temperature and food composition) affect otolith shape during fish early-juvenile phase? An experimental approach applied to European Seabass (Dicentrarchus labrax)
Provedor de dados: 5
Autores: Mahé, Kelig; Gourtay, Clemence; Bled--defruit, Geoffrey; Chantre, Celina; De Pontual, Helene; Amara, Rachid; Claireaux, Guy; Audet, C.; Zambonino-infante, Jose-luis; Ernande, Bruno.
Otolith shape is an efficient tool for fish stock discrimination. Therefore, it is crucial to identify the environmental parameters that could influence otolith morphogenesis and growth. Current global ocean warming negatively affects the production of polyunsaturated fatty acids (EPA and DHA) by phytoplankton and thus their availability in marine food webs. As EPA and DHA are essential nutrients for most fish species, their deficiency could affect many aspects of fish physiology, notably otolith morphogenesis. The goal of this study was to assess experimentally the combined influences of temperature (T) and dietary polyunsaturated fatty acid (PUFA) content on European seabass (Dicentrarchus labrax) otolith morphogenesis during early life stages. 300...
Tipo: Text
Palavras-chave: N-3 polyunsaturated fatty acids; Otolith shape; Temperature effect; Elliptic Fourier descriptors; Multivariate mixed-effects models; Directional asymmetry.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00588/70054/68017.pdf

Use of fish otoliths as a temporal biomarker of field uranium exposure
Provedor de dados: 5
Autores: Mounicou, S.; Frelon, S.; Le Guernic, A.; Eb-levadoux, Y.; Camilleri, V.; Fevrier, L.; Pierrisnard, S.; Carasco, L.; Gilbin, R.; Mahé, Kelig; Tabouret, Helene; Bareille, G.; Simon, O.
This study aimed to determine uranium (U) pollution over time using otoliths as a marker of fish U contamination. Experiments were performed in field contamination (~20 μg L−1: encaged fish: 15d, 50d and collected wild fish) and in laboratory exposure conditions (20 and 250 μg L−1, 20d). We reported the U seasonal concentrations in field waterborne exposed roach fish (Rutilus rutilus), in organs and otoliths. Otoliths were analyzed by ICPMS and LA-ICP SF MS of the entire growth zone. Concentrations were measured on transects from nucleus to the edge of otoliths to characterize environmental variations of metal accumulation. Results showed a spatial and temporal variation of U contamination in water (from 51 to 9.4 μg L−1 at the surface of the water...
Tipo: Text
Palavras-chave: Roach; Accumulation; Laser ablation ICP-MS.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00505/61622/65534.pdf

Populations ichtyologiques démersales du plateau continental. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Vérin, Yves; Vaz, Sandrine; Coppin, Franck; Delpech, Jean-paul; Mahé, Kelig; Petitgas, Pierre; Bez, Nicolas.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Poissons démersaux; Plateau continental; Espèces sensibles.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00327/43842/43416.pdf

Populations ichtyologiques de petits pélagiques. Sous-région marine Manche - Mer du Nord. Evaluation initiale DCSMM.
Provedor de dados: 5
Autores: Vérin, Yves; Vaz, Sandrine; Coppin, Franck; Delpech, Jean-paul; Mahé, Kelig; Petitgas, Pierre; Bez, Nicolas.
Tipo: Text
Palavras-chave: Manche; Mer du Nord; Petits pélagiques; Espèces; Biocénose; Etat des stocks.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00327/43843/43417.pdf