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Papers by Daniela Banaru

Research paper thumbnail of Multi-trophic markers illuminate the understanding of the functioning of a remote, low coral cover Marquesan coral reef food web

Scientific Reports

We studied the food web structure and functioning of a coral reef ecosystem in the Marquesas Isla... more We studied the food web structure and functioning of a coral reef ecosystem in the Marquesas Islands, French Polynesia, characterized by low coral cover, high sea surface temperature and meso- to eutrophic waters. The Marquesas constitute a relevant ecosystem to understand the functioning of low diversity reefs that are also subject to global change. A multi-tracer assessment of organic matter pathways was run to delineate ecosystem functioning, using analysis of fatty acids, bulk and compound specific stable isotope analysis and stable isotopes mixing models. Macroalgae and phytoplankton were the two major food sources fueling this food web with, however, some marked seasonal variations. Specifically, zooplankton relied on phytoplankton-derived organic matter and herbivorous fishes on macroalgae-derived organic matter to a much higher extent in summer than in winter (~ 75% vs. ~ 15%, and ~ 70 to 75% vs. ~ 5 to 15%, respectively) . Despite remarkably high δ15N values for all trophic...

Research paper thumbnail of First overview on trophic relationships of the invasive ctenophore Mnemiopsis leidyi in a Mediterranean coastal lagoon (Berre Lagoon, France): benthic–pelagic coupling evidenced by carbon and nitrogen stable isotope composition

Regional Studies in Marine Science

Research paper thumbnail of Primary production and depth drive different trophic structure and functioning of fish assemblages in French marine ecosystems

Research paper thumbnail of Seasonal variation in biochemical and energy content of size-fractionated zooplankton in the Bay of Marseille (North-Western Mediterranean Sea)

Journal of Marine Systems

Research paper thumbnail of Implementation of an end-to-end model of the Gulf of Lions ecosystem (NW Mediterranean Sea). II. Investigating the effects of high trophic levels on nutrients and plankton dynamics and associated feedbacks

Research paper thumbnail of Implementation of an end-to-end model of the Gulf of Lions ecosystem (NW Mediterranean Sea). I. Parameterization, calibration and evaluation

Research paper thumbnail of Unexpected spatial impact of treatment plant discharges induced by episodic hydrodynamic events: Modelling Lagrangian transport of fine particles by Northern Current intrusions in the bays of Marseille (France)

Research paper thumbnail of Two-step procedure for trace element analysis in food via calibration-free laser-induced breakdown spectroscopy

Spectrochimica Acta Part B: Atomic Spectroscopy

Research paper thumbnail of Mercury in blue shark (Prionace glauca) and shortfin mako (Isurus oxyrinchus) from north-eastern Atlantic: Implication for fishery management

Marine pollution bulletin, 2018

Pelagic sharks (blue shark Prionace glauca and shortfin mako Isurus oxyrinchus) caught by long-li... more Pelagic sharks (blue shark Prionace glauca and shortfin mako Isurus oxyrinchus) caught by long-line Spanish and Portuguese fleets in the NE Atlantic, were sampled at Vigo fish market (Spain) for total mercury (Hg) analysis. Hg concentration in white muscle increased with size and weight in both species, but at a higher rate in shortfin mako than in the blue shark. No difference was found with sex, year and season. Spatial variation was observed in the blue shark with higher Hg values in the North of the Azorean archipelago, but not in the shortfin mako. These high-level predators are particularly susceptible to bioaccumulate contaminants (Hg) in their tissues (muscle). However, a significant positive relationship between Hg concentration and trophic level (δN) of individuals was observed only in the shortfin mako. Most sharks landed were juveniles which presented Hg concentration lower than the maximum limit allowed by the European Union (1mgkg wet weight) for marketing. However, co...

Research paper thumbnail of Mercury in blue shark (Prionace glauca) and shortfin mako (Isurus oxyrinchus) from north-eastern Atlantic: Implication for fishery management

Marine Pollution Bulletin, 2018

A B S T R A C T Pelagic sharks (blue shark Prionace glauca and shortfin mako Isurus oxyrinchus) c... more A B S T R A C T Pelagic sharks (blue shark Prionace glauca and shortfin mako Isurus oxyrinchus) caught by long-line Spanish and Portuguese fleets in the NE Atlantic, were sampled at Vigo fish market (Spain) for total mercury (Hg) analysis. Hg concentration in white muscle increased with size and weight in both species, but at a higher rate in shortfin mako than in the blue shark. No difference was found with sex, year and season. Spatial variation was observed in the blue shark with higher Hg values in the North of the Azorean archipelago, but not in the shortfin mako. These high-level predators are particularly susceptible to bioaccumulate contaminants (Hg) in their tissues (muscle). However, a significant positive relationship between Hg concentration and trophic level (δ 15 N) of individuals was observed only in the shortfin mako. Most sharks landed were juveniles which presented Hg concentration lower than the maximum limit allowed by the European Union (1 mg kg − 1 wet weight) ...

Research paper thumbnail of The same but different: stable isotopes reveal two distinguishable, yet similar, neighbouring food chains in a coral reef

Journal of the Marine Biological Association of the United Kingdom

Stable isotope compositions were studied in particulate organic matter (POM), zooplankton and dif... more Stable isotope compositions were studied in particulate organic matter (POM), zooplankton and different trophic groups of teleosts to compare food chains based on plankton at two sites (lagoon and outer slope) in a New Caledonian coral reef. For each trophic compartment, δ13C values were always lower in the outer slope than in the lagoon. This result may be explained by potential differences in POM composition between the two environments, suggesting that the two food chains are based on different primary sources of carbon. In contrast, δ15N values did not vary between the lagoon and the outer slope, indicating that these two food chains presented similar length and trophic levels, despite being distinguishable.

Research paper thumbnail of Influence des apports du Danube sur les réseaux trophiques des poissons de la côte roumaine (mer Noire)

Research paper thumbnail of Non-target and released alive by-catches distributions observed during French driftnet fishery in the Northwestern Mediterranean Sea (2000-2003 database)

Journal of Oceanography Research and Data, Dec 7, 2010

Research paper thumbnail of Les ondes magnétiques: une mesure efficace pour réduire les captures des requins peau bleue ?

Research paper thumbnail of Atlantic bluefin tuna (Thunnus thynnus) and swordfish (Xiphias gladius) catch distributions observed during tunaye fishery in the Northwestern Mediterranean Sea (2000-2003 database)

Journal of Oceanography Research and Data, Feb 18, 2010

Research paper thumbnail of Ecological indicators to capture the effects of fishing on biodiversity and conservation status of marine ecosystems

Ecological Indicators, 2016

Research paper thumbnail of Hooks equipped with magnets can increase catches of blue shark (Prionace glauca) by longline fishery

Fisheries Research, 2015

tBlue shark (Prionace glauca) populations are decreasing worldwide and the species is currently c... more tBlue shark (Prionace glauca) populations are decreasing worldwide and the species is currently classi-fied as near threatened. However, it is the main species caught by the Spanish and Portuguese longlinefisheries; and blue shark is specifically targeted by a part of these fleets in the northeastern AtlanticOcean. Sharks are well known to be able to detect electric fields in the microvolt range and this sensehas been proposed to provide a mechanism to detect the earth’s magnetic field. As a result, the use ofmagnets has been proposed as a method to reduce shark interactions with fishing gear. We thereforetested two models of high field strength neodymium magnets to effect shark catch rates during commer-cial longline fishing operations. Our results show that magnets do not reduce blue shark catch rates andcan even have an attractive effect. This effect was significantly higher for the larger magnet model tested(26 mm × 11 mm × 12 mm, 0.885 T) compared to the smaller one (20 mm × 13 mm × 15 mm, 0.464 T). Wealso noted that hooks remain magnetized after removal of the magnets and are even slightly magnetizedwithout any previous contact with a magnet.

Research paper thumbnail of Trophic niche overlap of sprat and commercial small pelagic teleosts in the Gulf of Lions (NW Mediterranean Sea)

Journal of Sea Research, 2015

Research paper thumbnail of Relationships between fish length and otolith size for five cyprinid speciesfrom Lake Ladik, Samsun, Turkey

TURKISH JOURNAL OF ZOOLOGY, 2015

Research paper thumbnail of Morat et al. ALR 2012 addit

Research paper thumbnail of Multi-trophic markers illuminate the understanding of the functioning of a remote, low coral cover Marquesan coral reef food web

Scientific Reports

We studied the food web structure and functioning of a coral reef ecosystem in the Marquesas Isla... more We studied the food web structure and functioning of a coral reef ecosystem in the Marquesas Islands, French Polynesia, characterized by low coral cover, high sea surface temperature and meso- to eutrophic waters. The Marquesas constitute a relevant ecosystem to understand the functioning of low diversity reefs that are also subject to global change. A multi-tracer assessment of organic matter pathways was run to delineate ecosystem functioning, using analysis of fatty acids, bulk and compound specific stable isotope analysis and stable isotopes mixing models. Macroalgae and phytoplankton were the two major food sources fueling this food web with, however, some marked seasonal variations. Specifically, zooplankton relied on phytoplankton-derived organic matter and herbivorous fishes on macroalgae-derived organic matter to a much higher extent in summer than in winter (~ 75% vs. ~ 15%, and ~ 70 to 75% vs. ~ 5 to 15%, respectively) . Despite remarkably high δ15N values for all trophic...

Research paper thumbnail of First overview on trophic relationships of the invasive ctenophore Mnemiopsis leidyi in a Mediterranean coastal lagoon (Berre Lagoon, France): benthic–pelagic coupling evidenced by carbon and nitrogen stable isotope composition

Regional Studies in Marine Science

Research paper thumbnail of Primary production and depth drive different trophic structure and functioning of fish assemblages in French marine ecosystems

Research paper thumbnail of Seasonal variation in biochemical and energy content of size-fractionated zooplankton in the Bay of Marseille (North-Western Mediterranean Sea)

Journal of Marine Systems

Research paper thumbnail of Implementation of an end-to-end model of the Gulf of Lions ecosystem (NW Mediterranean Sea). II. Investigating the effects of high trophic levels on nutrients and plankton dynamics and associated feedbacks

Research paper thumbnail of Implementation of an end-to-end model of the Gulf of Lions ecosystem (NW Mediterranean Sea). I. Parameterization, calibration and evaluation

Research paper thumbnail of Unexpected spatial impact of treatment plant discharges induced by episodic hydrodynamic events: Modelling Lagrangian transport of fine particles by Northern Current intrusions in the bays of Marseille (France)

Research paper thumbnail of Two-step procedure for trace element analysis in food via calibration-free laser-induced breakdown spectroscopy

Spectrochimica Acta Part B: Atomic Spectroscopy

Research paper thumbnail of Mercury in blue shark (Prionace glauca) and shortfin mako (Isurus oxyrinchus) from north-eastern Atlantic: Implication for fishery management

Marine pollution bulletin, 2018

Pelagic sharks (blue shark Prionace glauca and shortfin mako Isurus oxyrinchus) caught by long-li... more Pelagic sharks (blue shark Prionace glauca and shortfin mako Isurus oxyrinchus) caught by long-line Spanish and Portuguese fleets in the NE Atlantic, were sampled at Vigo fish market (Spain) for total mercury (Hg) analysis. Hg concentration in white muscle increased with size and weight in both species, but at a higher rate in shortfin mako than in the blue shark. No difference was found with sex, year and season. Spatial variation was observed in the blue shark with higher Hg values in the North of the Azorean archipelago, but not in the shortfin mako. These high-level predators are particularly susceptible to bioaccumulate contaminants (Hg) in their tissues (muscle). However, a significant positive relationship between Hg concentration and trophic level (δN) of individuals was observed only in the shortfin mako. Most sharks landed were juveniles which presented Hg concentration lower than the maximum limit allowed by the European Union (1mgkg wet weight) for marketing. However, co...

Research paper thumbnail of Mercury in blue shark (Prionace glauca) and shortfin mako (Isurus oxyrinchus) from north-eastern Atlantic: Implication for fishery management

Marine Pollution Bulletin, 2018

A B S T R A C T Pelagic sharks (blue shark Prionace glauca and shortfin mako Isurus oxyrinchus) c... more A B S T R A C T Pelagic sharks (blue shark Prionace glauca and shortfin mako Isurus oxyrinchus) caught by long-line Spanish and Portuguese fleets in the NE Atlantic, were sampled at Vigo fish market (Spain) for total mercury (Hg) analysis. Hg concentration in white muscle increased with size and weight in both species, but at a higher rate in shortfin mako than in the blue shark. No difference was found with sex, year and season. Spatial variation was observed in the blue shark with higher Hg values in the North of the Azorean archipelago, but not in the shortfin mako. These high-level predators are particularly susceptible to bioaccumulate contaminants (Hg) in their tissues (muscle). However, a significant positive relationship between Hg concentration and trophic level (δ 15 N) of individuals was observed only in the shortfin mako. Most sharks landed were juveniles which presented Hg concentration lower than the maximum limit allowed by the European Union (1 mg kg − 1 wet weight) ...

Research paper thumbnail of The same but different: stable isotopes reveal two distinguishable, yet similar, neighbouring food chains in a coral reef

Journal of the Marine Biological Association of the United Kingdom

Stable isotope compositions were studied in particulate organic matter (POM), zooplankton and dif... more Stable isotope compositions were studied in particulate organic matter (POM), zooplankton and different trophic groups of teleosts to compare food chains based on plankton at two sites (lagoon and outer slope) in a New Caledonian coral reef. For each trophic compartment, δ13C values were always lower in the outer slope than in the lagoon. This result may be explained by potential differences in POM composition between the two environments, suggesting that the two food chains are based on different primary sources of carbon. In contrast, δ15N values did not vary between the lagoon and the outer slope, indicating that these two food chains presented similar length and trophic levels, despite being distinguishable.

Research paper thumbnail of Influence des apports du Danube sur les réseaux trophiques des poissons de la côte roumaine (mer Noire)

Research paper thumbnail of Non-target and released alive by-catches distributions observed during French driftnet fishery in the Northwestern Mediterranean Sea (2000-2003 database)

Journal of Oceanography Research and Data, Dec 7, 2010

Research paper thumbnail of Les ondes magnétiques: une mesure efficace pour réduire les captures des requins peau bleue ?

Research paper thumbnail of Atlantic bluefin tuna (Thunnus thynnus) and swordfish (Xiphias gladius) catch distributions observed during tunaye fishery in the Northwestern Mediterranean Sea (2000-2003 database)

Journal of Oceanography Research and Data, Feb 18, 2010

Research paper thumbnail of Ecological indicators to capture the effects of fishing on biodiversity and conservation status of marine ecosystems

Ecological Indicators, 2016

Research paper thumbnail of Hooks equipped with magnets can increase catches of blue shark (Prionace glauca) by longline fishery

Fisheries Research, 2015

tBlue shark (Prionace glauca) populations are decreasing worldwide and the species is currently c... more tBlue shark (Prionace glauca) populations are decreasing worldwide and the species is currently classi-fied as near threatened. However, it is the main species caught by the Spanish and Portuguese longlinefisheries; and blue shark is specifically targeted by a part of these fleets in the northeastern AtlanticOcean. Sharks are well known to be able to detect electric fields in the microvolt range and this sensehas been proposed to provide a mechanism to detect the earth’s magnetic field. As a result, the use ofmagnets has been proposed as a method to reduce shark interactions with fishing gear. We thereforetested two models of high field strength neodymium magnets to effect shark catch rates during commer-cial longline fishing operations. Our results show that magnets do not reduce blue shark catch rates andcan even have an attractive effect. This effect was significantly higher for the larger magnet model tested(26 mm × 11 mm × 12 mm, 0.885 T) compared to the smaller one (20 mm × 13 mm × 15 mm, 0.464 T). Wealso noted that hooks remain magnetized after removal of the magnets and are even slightly magnetizedwithout any previous contact with a magnet.

Research paper thumbnail of Trophic niche overlap of sprat and commercial small pelagic teleosts in the Gulf of Lions (NW Mediterranean Sea)

Journal of Sea Research, 2015

Research paper thumbnail of Relationships between fish length and otolith size for five cyprinid speciesfrom Lake Ladik, Samsun, Turkey

TURKISH JOURNAL OF ZOOLOGY, 2015

Research paper thumbnail of Morat et al. ALR 2012 addit

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