Influence of the summer deep-sea circulations on passive drifts
among the submarine canyons in the northwestern Mediterranean
Sea

Clavel-Henry, Morane; Solé, Jordi; Ahumada-Sempoal, Miguel Ángel; Bahamón, Nixon; Briton, Florence; Rotllant, Guiomar; Company, Joan B.

doi:10.5194/os-2019-61

Cited by 4 publications

(10 citation statements)

References 42 publications

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“…A Mellor-Yamada 2.5 turbulence closure scheme is used for subgridscale mixing in the simulation [31]. Different models (IBM in [12], and a spatiotemporal food web model (Ecopath with Ecosim) in [32]) have successfully used the daily outputs of the ROMS model in the NW Mediterranean Sea and on the Valencian Gulf. The simulation domain ranged from 38˚N to 43.69˚N and from 0.65˚W to 6.08˚E (Fig 1), with a grid spacing of 2 km (with 256 x 384 grid points horizontally).…”

Section: The Hydrodynamic Modelmentioning

confidence: 99%

“…The ROMS outputs are validated in [12] and provided realistic products of the hydrodynamic and hydrographic characteristics (current velocities, salinity, and temperature) of the NW Mediterranean Sea. The upper water layers were characterized by the main southward current (i.e., the Northern Current) following the eastern coast of Spain and by several mesoscale circulations, like eddies.…”

Section: The Hydrodynamic Modelmentioning

confidence: 99%

“…Adaptation of the IBM to the shrimp larval cycle. Following the temporal and spatial spawners distribution, virtual eggs [6,12,33] were set to be released in summer at midnight [42] on the bottom of the NW Mediterranean continental slope between 500 m and 800 m isobaths.…”

Section: The Individual-based Modelmentioning

confidence: 99%

“…Number of particles. The methodology of [45] adjusted in [12] was used to determine the lowest number of individuals to be released and to guarantee that 95% of the dispersal variability is considered in our results. It is based on the average of the Fraction of Unexplained Variance [45], which is got by extracting randomly 100 subsamples of N drifts from 350,000 simulated trajectories and by computing the cross-correlation between the 100 subsamples.…”

Section: The Individual-based Modelmentioning

confidence: 99%

“…Because ripe females spawn on the sea bottom, the embryonic and nauplius stages are assumed to have abilities (buoyancy, swimming ability) that take them to the surface. In [12], an Individual-Based Model (IBM) study showed that the near-bottom circulation has minor effect on passive individual dispersal (encompassing neutral eggs and inactive larvae of A. antennatus). The study indicated that near-bottom vertical currents do not advect individuals up to shallower layers, and suggested that the vertical distribution of eggs or larvae can only be explained by their capacity of moving across the water column.…”

Section: Introductionmentioning

confidence: 99%

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Modeled buoyancy of eggs and larvae of the deep-sea shrimp Aristeus antennatus (Crustacea: Decapoda) in the northwestern Mediterranean Sea

et al. 2020

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Information on the buoyancy of eggs and larvae from deep-sea species is rare but necessary for explaining the position of non-swimming larvae in the water column. Due to embryonic morphology and ecology diversities, egg buoyancy has important variations within one species and among other ones. Nevertheless, it has hardly been explored if this buoyancy variability can be a strategy for deep-sea larvae to optimize their transport beyond their spawning areas. In the northwestern Mediterranean Sea, protozoea and mysis larvae of the commercial deep-sea shrimp Aristeus antennatus were recently found in upper layers, but to present, earlier stages like eggs and nauplii have not been collected. Using a Lagrangian transport model and larval characteristics, we evaluate the buoyancy and hydrodynamic effects on the transport of A. antennatus' larvae in the northwestern Mediterranean Sea. The transport models suggested that 75% of buoyant eggs released between 500 and 800 m depth (i.e., known spawning area), reached the upper water layers (0-75 m depth). Then, according to the modeled larval drifts, three spawning regions were defined in the studied area: 1) the northern part, along a continental margin crossed by large submarine canyons; 2) the central part, with two circular circulation structures (i.e., eddies); and 3) the southern part, with currents flowing through a channel. The number of larvae in the most upper layer (0-5 m depth) was higher if the larval transport model accounted for the ascent of eggs and nauplii (81%) instead of eggs reaching the surface before hatching (50%). The larvae reaching the most water upper layer (0-5 m depth) had higher rates of dispersal than the ones transported below the surface layer (deeper than 5 m depth). The results of larval dispersal simulations have implications for the understanding of A. antennatus larval ecology and for management decisions related to the shrimp fisheries in the northwestern Mediterranean Sea.

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Section: The Hydrodynamic Modelmentioning

confidence: 99%

Section: The Hydrodynamic Modelmentioning

confidence: 99%

Section: The Individual-based Modelmentioning

confidence: 99%

Section: The Individual-based Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Modeled buoyancy of eggs and larvae of the deep-sea shrimp Aristeus antennatus (Crustacea: Decapoda) in the northwestern Mediterranean Sea

et al. 2020

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Genetic analyses reveal temporal stability and connectivity pattern in blue and red shrimp Aristeus antennatus populations

Agulló

Heras

García‐Marín

et al. 2020

Sci Rep

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Temporal variability of the genetic structure and connectivity patterns of the blue and red shrimp Aristeus antennatus in the seven most important fishing grounds of the Western Mediterranean Sea, were assessed using twelve microsatellite loci during 2 consecutive years (2016 and 2017), in a total of 1403 adult individuals. A high level of geographical connectivity among groups was observed in the two studied years. In fact, no significant geographical differentiation was found in 2016 (FST = 0.0018, p > 0.05), whereas it was indicated in 2017 (FST = 0.0025, p < 0.05). This small divergence in 2017 was not attributed to the distance among locations nor to the effect of the Ibiza Channel. Significant allele frequency changes were found at local level between the 2 years (FCT = 0.0006, p < 0.05), mainly due to Blanes’ fishing ground. Larval dispersal from the North to the South through the main superficial current supports the high level of connectivity pattern found. The temporal genetic instability detected in the Blanes’ fishing ground could be explained by oceanographic temporary features. Our findings evidence only one biological unit in the study region and establish the baseline for an inter-federal management plan of A. antennatus.

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Modeled buoyancy of eggs and larvae of the deep-sea shrimp Aristeus antennatus (Crustacea: Decapoda) in the northwestern Mediterranean Sea

Clavel-Henry

Solé

Kristiansen

et al. 2019

Preprint

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29 Information on the buoyancy of eggs and larvae from deep-sea species is rare but necessary for 30 explaining the position of non-swimming larvae in the water column. Due to embryonic 31 morphology and ecology diversities, egg buoyancy has important variations within one species and 32 among other ones. Nevertheless, it has hardly been explored if this buoyancy variability can be a 33 strategy for deep-sea larvae to optimize their transport beyond their spawning areas. In the 34 northwestern Mediterranean Sea, protozoea and mysis larvae of the commercial deep-sea shrimp 35 Aristeus antennatus were recently found in upper layers, but to present, earlier stages like eggs and 36 nauplii have not been collected. Using a Lagrangian transport model and larval characteristics, we 37 evaluate the buoyancy and hydrodynamic effects on the transport of A. antennatus larvae in the 38 northwestern Mediterranean Sea. The transport models suggested that 75% of buoyant eggs 39 released between 500 and 800 m depth (i.e., known spawning area), reached the upper water layers 40 (0-75 m depth). Then, according to the modeled larval drifts, three spawning regions were defined 41 in the studied area: 1) the northern part, along a continental margin crossed by large submarine 42 canyons; 2) the central part, with two circular circulation structures (i.e., eddies); and 3) the 43 southern part, with currents flowing through a channel. The number of larvae in the most upper 44 layer (0-5 m depth) was higher if the larval transport model accounted for the ascent of eggs and 45 nauplii (81%) instead of eggs reaching the surface before hatching (50%). The larvae reaching the 46 most water upper layer (0-5 m depth) had higher rates of dispersal than the ones transported below 47 the surface layer (deeper than 5 m depth). The results of larval dispersal simulations have 48 implications for the understanding of A. antennatus larval ecology and for management decisions 49 related to the shrimp fisheries in the northwestern Mediterranean Sea. 50 51 Introduction 52 Numerous species have a pelagic larval cycle which links the spawning places to the 53 recruitment areas. Larval cycle is a relatively short time lapse compared to the life cycle of the 54 animal, but it is the phase when large dispersions occur [1]. For benthic species, the distribution of 55 the species mostly relies on the transported larvae which have several mechanisms for positioning 56 themselves in productive and favorable waters for growing and being displaced [2]. Following the 57 adopted strategy, the larvae can be retained on the spawning places or connect to other areas, that is 58 of high interest for species with high commercial value. For that reason, many studies specifically 59 addressed larval drifts in order to determine the efficiency of the fisheries management [3, 4]. 61Aristeus antennatus is a deep-sea shrimp with a high commercial value in the northwestern 62 Mediterranean Sea. Since 1980, the reproductive cycle, biology, and the temporal and spatial 63 dyna...

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Influence of the summer deep-sea circulations on passive drifts among the submarine canyons in the northwestern Mediterranean Sea

Cited by 4 publications

References 42 publications

Modeled buoyancy of eggs and larvae of the deep-sea shrimp Aristeus antennatus (Crustacea: Decapoda) in the northwestern Mediterranean Sea

Modeled buoyancy of eggs and larvae of the deep-sea shrimp Aristeus antennatus (Crustacea: Decapoda) in the northwestern Mediterranean Sea

Genetic analyses reveal temporal stability and connectivity pattern in blue and red shrimp Aristeus antennatus populations

Modeled buoyancy of eggs and larvae of the deep-sea shrimp Aristeus antennatus (Crustacea: Decapoda) in the northwestern Mediterranean Sea

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