Nonlinear ecological processes driving the distribution of marine decapod larvae

Peña, Marian; Carbonell, Aïna; Tor, Ariadna; Alvarez-Berastegui, Diego; Balbín, Rosa; Santos, Antonina Dos; Alemany, F.

doi:10.1016/j.dsr.2014.11.017

Cited by 9 publications

(4 citation statements)

References 49 publications

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“…g . temporal patterns of spawning, narrow ranges in pelagic larval duration, variations in reef-associated noise, wind direction, or local dynamism of the water column) [ 7 , 50 ]. The results of this study do not provide definitive evidence for either the ‘large larval patch’ or ‘dilution of a smaller larval patch at the time of settlement’ hypotheses [ 16 , 17 ].…”

Section: Discussionmentioning

confidence: 99%

Consistency in the supply of larval fishes among coral reefs in French Polynesia

Besson¹,

Gache²,

Brooker³

et al. 2017

PLoS ONE

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For marine fishes with a bipartite life cycle, pelagic larval dispersal can shape the distribution, connectivity, composition and resilience of adult populations. Numerous studies of larval dispersal, and associated settlement and recruitment processes, have examined the relationship between population connectivity and oceanographic features. However, relatively little is known about spatial and temporal variation in the abundance of larvae settling among different reefs and the extent to which the species assemblage of larvae settling at one location is reflective of the assemblage in neighbouring areas. Here, using crest nets, which provide a non-selective measure of the total abundance and assemblage of larvae settling to a reef (i.e. larval supply), we collected larval coral reef fishes at five locations surrounding two spatially disparate French Polynesian islands: Moorea and Nengo-Nengo. Overall, larval settlement patterns were correlated with the lunar cycle, with larval abundance peaking during the new moon. Although there were some spatial differences in larval supply among the five monitored sites, settlement patterns were largely consistent, even at the species level, irrespective of factors such as coastline orientation or distance between sites. This study provides further insights into the mechanisms driving patterns of dispersal and settlement of larval fishes over large spatial scales.

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Section: Discussionmentioning

confidence: 99%

Consistency in the supply of larval fishes among coral reefs in French Polynesia

Besson¹,

Gache²,

Brooker³

et al. 2017

PLoS ONE

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“…To evaluate whether the dFAD moratorium's spatiotemporal strata may alter the detection of catch hotspots we ran our analyses on the With regards to the juvenile silky shark, we created an estimated abundance index from the quarterly heatmaps that summarize the European observer programme's data (Spain and France) collected between 2003 and 2015 (Lopez et al, 2020). We recreated the paper's sampling cells using the 'SpatialPolygons' function from the sp package (Pebesma & Bivand, 2012). We then overlapped these large sampling zones with the ICCAT1 × 1° grid to assign a shark abundance index value to each of the ICCAT cells.…”

Section: Case Studymentioning

confidence: 99%

“…Aspiring to develop a method for hotspot identification easier to implement and to transfer to different systems and fishery managers, we here propose self‐organizing maps (SOMs), an unsupervised artificial neural network (Kohonen, 1982). Their use is rising in ecological studies as they allow to explore patterns in large and complex datasets without a priori assumptions (Kalteh et al, 2008; Kangur et al, 2007; Park et al, 2006; Peña et al, 2015), yet they have been applied to few fisheries' studies until now (Conti et al, 2012; Hyun et al, 2005; Mendoza‐Carranza et al, 2018; Russo et al, 2016; Simić et al, 2014). Amongst their main characteristics, SOM smooth data by filtering out noise.…”

Section: Introductionmentioning

confidence: 99%

Multi‐species hotspots detection using self‐organizing maps: Simulation and application to purse seine tuna fisheries management

et al. 2022

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1. To fulfil fisheries management objectives that often include implementing the precautionary and ecosystem-based approaches, multispecies fisheries data need to be analysed. Amongst the different methods dealing with these multidimensional data, self-organizing maps (SOMs) remain rarely used, although they are highly flexible in data input and offer visualization possibilities particularly suited to summarize complex datasets.2. Here, we propose to combine SOMs with a clustering approach to break down data complexity and produce simple geographic maps showing catch hotspots, which can indicate sensitive zones in terms of fishery management. To promote this approach, we tested it first on simulated datasets and then on the openaccess ICCAT commercial catch database of the tropical tuna fisheries of the Atlantic Ocean. We aimed to detect drifting fish aggregating devices (dFADs) catch hotspots of juveniles of two tuna species, bigeye and yellowfin tunas and of the silky shark, a commonly bycaught vulnerable shark species, in tropical tuna purse seine fisheries. Simulations on datasets increasing in complexity (in number, geographic and duration extent of the hotspots and number of species in the analysis) informed us about the method's sensitivity and limits.3. Our findings showed that, in the context of multi-specific fisheries, the detection of the hotspot is dependent on a certain level of catch within the hotspot and that adding species to the analysis tended to mask small and short-duration hotspots. Applied to tropical tuna fisheries' data, the method confirmed the empirical knowledge on which first time-area closures were based and provided scientifical support. 4. All in all, the visual support provided by the method, its interpretability and its potential transferability to other fisheries' systems constitute its main strengths and imply a possible implementation in management decisions; specifically, as a tool to reach agreement between stakeholders in the definition of regulated areas for protecting juveniles of tunas and vulnerable associated species to dFAD practices.

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“…Decapods dominate slope communities in the BSB (Cartes & Sardà, 1993), and several studies exploring the distribution and the composition of larvae community have been carried at sub‐surface water layers (Olivar et al., 1998; Peña et al., 2015; Torres et al, 2014). Yet, larvae assemblages in deep waters remain virtually unknown.…”

Section: Introductionmentioning

confidence: 99%

Composition and distribution of the larval decapod community in the deep sea of the Western Mediterranean Sea Balearic Sub‐basin

Carbonell

Aparicio‐González

Papiol

et al. 2020

Fisheries Oceanography

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Mechanisms facilitating larvae transport from continental to more oceanic areas were investigated in the Balearic sub‐basin (BSB), Western Mediterranean Sea. The abundance, distribution, and development stages of decapod larvae were recorded for a transect of 28 stations crossing the central eddy of the BSB. Zooplankton samples were taken to 1,800 m depth by horizontal and oblique 500‐µm mesh size nets hauls towed near the benthic boundary (BBL) and in deep scattering layers (DSL). In total, 67 taxa belonging to Decapoda and one Stomatopoda were identified. Advanced development represented 75% of the individuals recorded. 75% of the species corresponded to adults of deep‐sea species, 9% were sergestids (mesopelagic species), and the remaining 16% corresponded to shelf and coastal species. Cluster assemblages formed were related to the hydrological conditions, water masses dynamics, and geomorphologic structures mainly associated with nepheloid layers. Advanced and juvenile specimens of commercial species such as Parapenaeus longirostris, Geryon longipes, and Aristeus antennatus were found close to seafloor BBL. The influence of trophic ecology should be considered as the priority factor of larvae concentrations in deep.

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Nonlinear ecological processes driving the distribution of marine decapod larvae

Cited by 9 publications

References 49 publications

Consistency in the supply of larval fishes among coral reefs in French Polynesia

Consistency in the supply of larval fishes among coral reefs in French Polynesia

Multi‐species hotspots detection using self‐organizing maps: Simulation and application to purse seine tuna fisheries management

Composition and distribution of the larval decapod community in the deep sea of the Western Mediterranean Sea Balearic Sub‐basin

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