Modeling larval dispersal for the gilthead seabream in the northwestern Mediterranean Sea

Lett, Christophe; Barrier, Nicolas; Ourmiéres, Yann; Petit, Christelle; Labonne, Maylis; Bourjea, Jérôme; Darnaude, Audrey M.

doi:10.1016/j.marenvres.2019.104781

Cited by 7 publications

(11 citation statements)

References 72 publications

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“…The size range of larvae tested is also shown. Biophysical models addressing the influence of larval behavior on dispersal (i.e., the ability to follow cues thanks to their horizontal and vertical movements) provide additional evidence on the extraordinary capacities of temperate fish larvae to control their dispersion in coastal areas [2,10,11,30]. Such models suggest that temperate fish larvae are active swimmers only requiring to make use of modest swimming speeds (1-10 cm s −1 ) to control their transport and distribution in coastal areas and to avoid offshore advection [2,30].…”

Section: Swimming Performance Of Temperate Fish Larvaementioning

confidence: 99%

“…However, when post-flexion larvae are in the range of nursery cues, they orientate their swimming to follow odor, sound, and visual cues (see Figure 2 in [2]). Thus, the development of swimming capabilities and behaviors that interact with physical transport processes influences larval dispersion outcomes [6,[8][9][10][11], settlement location [12], and recruitment success [13].…”

Section: Introductionmentioning

confidence: 99%

“…A few post-flexion fish larvae species are exceptional swimmers, capable of significant horizontal and vertical displacement [11,14]. Some fish larvae can swim at speeds higher than coastal currents, in a highly directional way and for long distances [14,15].…”

Section: Introductionmentioning

confidence: 99%

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Swimming Abilities of Temperate Pelagic Fish Larvae Prove that They May Control Their Dispersion in Coastal Areas

et al. 2019

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The Sense Acuity and Behavioral (SAAB) Hypothesis proposes that the swimming capabilities and sensorial acuity of temperate fish larvae allows them to find and swim towards coastal nursery areas, which are crucial for their recruitment. To gather further evidence to support this theory, it is necessary to understand how horizontal swimming capability varies along fish larvae ontogeny. Therefore, we studied the swimming capability of white seabream Diplodus sargus (Linnaeus, 1758) larvae along ontogeny, and their relationship with physiological condition. Thus, critical swimming speed (Ucrit) and the distance swam (km) during endurance tests were determined for fish larvae from 15 to 55 days post-hatching (DPH), and their physiological condition (RNA, DNA and protein contents) was assessed. The critical swimming speed of white seabream larvae increased along ontogeny from 1.1 cm s−1 (15 DPH) to 23 cm s−1 (50 and 55 DPH), and the distance swam by larvae in the endurance experiments increased from 0.01 km (15 DPH) to 86.5 km (45 DPH). This finding supports one of the premises of the SAAB hypothesis, which proposes that fish larvae can influence their transport and distribution in coastal areas due to their swimming capabilities. The relationship between larvae’s physiological condition and swimming capabilities were not evident in this study. Overall, this study provides critical information for understanding the link between population dynamics and connectivity with the management and conservation of fish stocks.

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Section: Swimming Performance Of Temperate Fish Larvaementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Swimming Abilities of Temperate Pelagic Fish Larvae Prove that They May Control Their Dispersion in Coastal Areas

et al. 2019

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“…Therefore, our results will only be relevant for species with at least one planktonic pelagic phase (i.e., unable to swim against a current). Previous studies highlighted the roles of larval behavior and duration in dispersal and connectivity control (Fox et al, 2016;Lett et al, 2019;Taninaka et al, 2019). For instance, vertical larval migration may allow deep populations from nearby seamounts to repopulate shallow areas impacted by overfishing, which might increase the intraconnectivity within each seamount system (Fox et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Physical Connectivity Between the NE Atlantic Seamounts

2020

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Within the Portuguese Exclusive Economic Zone, the Great Meteor and Madeira-Tore complexes are highly productive areas, which are likely to be classified as marine protected areas (MPAs) due to their ecological vulnerability. This was the main focus of the BIOMETORE project and, framed on it, the aim of the present study was to investigate the physical connectivity between both seamount complexes. Using the HYbrid Coordinate Ocean Model coupled with the Connectivity Modeling System (CMS) (a Lagrangian tool), a series of experiments was conducted in order to determine the influence of the main oceanographic phenomena governing the area in: (i) the origin of the particles that reach each complex, (ii) their capacity to capture and retain incoming particles, and (iii) the physical connectivity between them as well as the intra-connectivity within each seamount system. Due to the geographical location of both groups of seamounts, the Azores Current (AzC) and its associated eddies were identified as the main transport pathways, its influence being stronger at intermediate waters and decreasing with depth. Notwithstanding, the Great Meteor and the Madeira-Tore were mainly affected by the AzC southward and eastward branches, respectively, resulting in a non-significant connectivity between the two groups. Meanwhile, the inter-connectivity between seamounts slightly varied with depth at the Great Meteor complex while increasing at Madeira-Tore. In addition, the Plateau, Irving, and Cruiser (PIC) seamounts from the Great Meteor complex and Gorringe and Coral from the Madeira-Tore complex proved to incorporate the regional connectivity routes. Although containing the three smallest seamounts, Madeira-Tore showed the higher capturing capacity per square kilometer, highlighting the influence of the "sticky water effect." In the Great Meteor complex, the "seamount effect" seems to be the main phenomenon responsible for the greater retention and self-recruitment abilities of these seamounts. The presented results provide valuable information for the design of a MPA to preserve these vulnerable habitats.

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“…To estimate functional connectivity among key marine habitats (coral reefs, Seamounts), MPA, and marine jurisdiction zones (EEZ and the high seas), we modelled larval dispersal using Itchyop v 3.3, an individualbased model designed to study the effects of physical and biological factors on the dynamics of fish eggs and larvae (Lett et al, 2008;Lett et al, 2019). Models were run off-line using the daily (24 hr) velocity fields from the hydrodynamic model.…”

Section: Dispersal Modelingmentioning

confidence: 99%

Aligning marine spatial conservation priorities with functional connectivity across maritime jurisdictions

Maina

Gamoyo

Adams

et al. 2019

Conservat Sci and Prac

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Globally, maritime boundaries on oceans form the basis of governance and management of natural resources, yet the fish, and other marine resources neither conform nor confine to these artificial boundaries. As goods and services from marine life continue to retrogress under the intense human exploitation and changing global environment, resilience could be supported through establishment of a functionally connected network of marine reserves across maritime jurisdictions. While the establishment of protected areas within the exclusive economic zones (EEZ) is expanding, mechanisms that would allow governments to conserve marine areas beyond national jurisdictions are currently inadequate.Consequently, implementing marine reserves is largely confined within territorial waters, high connectivity among contiguous maritime zones notwithstanding. As the global focus shifts toward achieving sustainable development goals for the oceans, there is a need for region-specific approaches to area-based biodiversity conservation that extends the scope of protection to areas in the high seas beyond the EEZ. Using simulations of functional connectivity and seafloor geomorphology, we present and apply in the Western Indian Ocean (WIO) region a contextual approach to regional marine conservation planning to inform a more effective regional marine conservation across maritime zones. K E Y W O R D Sareas beyond national jurisdiction, fisheries management, functional connectivity, high seas, larval dispersal, marine conservation planning, marine protected areas, ocean governance, regional MPA, seafloor geomorphic habitats, Western Indian Ocean

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Modeling larval dispersal for the gilthead seabream in the northwestern Mediterranean Sea

Cited by 7 publications

References 72 publications

Swimming Abilities of Temperate Pelagic Fish Larvae Prove that They May Control Their Dispersion in Coastal Areas

Swimming Abilities of Temperate Pelagic Fish Larvae Prove that They May Control Their Dispersion in Coastal Areas

Physical Connectivity Between the NE Atlantic Seamounts

Aligning marine spatial conservation priorities with functional connectivity across maritime jurisdictions

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