The contribution of migratory mesopelagic fishes to neuston fish assemblages across the Atlantic, Indian and Pacific Oceans

Olivar, M. Pilar; González-Gordillo, J. Ignacio; Salat, Jordi; Chust, Guillem; Cózar, Andrés; Hernández‐León, Santiago; Puelles, María Luz Fernández de; Irigoien, Xabier

doi:10.1071/mf14391

Cited by 34 publications

(20 citation statements)

References 40 publications

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“…Our results agree with growing evidence on the important linkage role of mid trophic level species such as mesopelagics in relaying trophic flow from basal species to top predators (Cury et al 2000;Livi et al 2011;Lai et al 2012;Nye et al 2013). Mesopelagic species are an important prey species of the SE Australian marine system (Smith et al 2011) and dominate the neustonic layers not only of this region but also the Atlantic, Indian and Pacific Oceans (Olivar et al 2016).…”

Section: Discussionsupporting

confidence: 90%

Identifying important species that amplify or mitigate the interactive effects of human impacts to marine food webs

Griffith¹

2018

Preprint

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Some species may have a larger role than others in the transfer of complex effects of multiple human stressors, such as changes in biomass, through marine food webs. We devised a novel approach to identify such species. We constructed annual interaction‐effect networks (IENs) of the simulated changes in biomass between species of the southeastern Australian marine system. Each annual IEN was composed of the species linked by either an additive (sum of the individual stressor response), synergistic (lower biomass compared with additive effects), or antagonistic (greater biomass compared with additive effects) response to the interaction effect of ocean warming, ocean acidification, and fisheries. Structurally, over the simulation period, the number of species and links in the synergistic IENs increased and the network structure became more stable. The stability of the antagonistic IENs decreased and became more vulnerable to the loss of species. In contrast, there was no change in the structural attributes of species linked by an additive response. Using indices common in food‐web and network theory, we identified the species in each IEN for which a change in biomass from stressor effects would disproportionately affect the biomass of other species via direct and indirect local, intermediate, and global predator–prey feeding interactions. Knowing the species that transfer the most synergistic or antagonistic responses in a food‐web may inform conservation under increasing multiple‐stressor impacts.

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Section: Discussionsupporting

confidence: 90%

Identifying important species that amplify or mitigate the interactive effects of human impacts to marine food webs

Griffith¹

2018

Preprint

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“…Besides, many species belong to the facultative neuston and undergo vertical migration, aggregating near the surface only during the night, e.g., T. lathami , Myctophidae species (Doyle, ; Hempel & Weikert, ), and some physostomous fishes (e.g., Engraulidae species) that migrate to the surface, where they inhale air through their widely opened mouth, to inflate their gas bladder and may reduce sink rate (Landaeta & Castro, ). Differences in composition of the neuston collected during the day and at night were already observed across the Atlantic, Indian and Pacific Oceans (Olivar et al, ).…”

Section: Discussionmentioning

confidence: 80%

“…lathami, Myctophidae species (Doyle, 1992;Hempel & Weikert, 1972), and some physostomous fishes (e.g., Engraulidae species) that migrate to the surface, where they inhale air through their widely opened mouth, to inflate their gas bladder and may reduce sink rate (Landaeta & Castro, 2013). Differences in composition of the neuston collected during the day and at night were already observed across the Atlantic, Indian and Pacific Oceans (Olivar et al, 2015). Bernardes et al, 2005), was more abundant in the neustonic layer than in samples collected at 1 m depth of the same area (Bonecker et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Seasonal variability of ichthyoneuston assemblage on the continental shelf and slope of the Southwest Atlantic Ocean, Brazil (20°–23°S)

et al. 2019

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Many marine organisms spend the early life history stages in neuston domain. Although the importance of ichthyoneuston, few studies were developed in the Southwest Atlantic Ocean. Therefore, this study aimed to improve the knowledge on ichthyoneuston of the Brazilian coast analyzing the vertical stratification and horizontal distribution of these organisms. Neuston samples were collected in daylight between 20°S and 23°S from February to April 2009 (late summer/early autumn; rainy season) and from August to September 2009 (late winter/early spring; dry season). Eggs of six taxa were identified: Anguilliformes, Engraulidae, Clupeidae, Synodontidae, Trichiuridae, and Maurolicus stehmanni (Sternoptychidae). The neustonic larval fish assemblage was composed by 40 families and 63 species. Mullidae and Myctophidae larvae were the most abundant in the rainy period while Mullidae and Mugilidae dominated in the dry season. Seasonal and spatial variation of larval fish assemblages in the neuston were structured by oceanographic features. The larval fish abundance on the outer slope stations may have been favored by the advection of an anticyclone that encompassed most of the study region during the cruise periods. In the rainy season, salinity and local depth structured the larval fish assemblage in a cross‐shelf gradient, while in the dry season the larval assemblage was structured around temperature and north‐south gradient. In the dry season, the cross‐shelf gradient was less pronounced mainly because of the low abundance and frequency of mesopelagic larvae. The low frequency and abundance of some species are probably related to the net avoidance of fish larvae during the day or dial vertical migration, as many species migrate to deeper layers during the day and ascend to neuston only at night. Nevertheless, the present study presented baseline information about the seasonal and spatial variation of the neustonic larval fish assemblage influenced by the oceanographic conditions in the Campos Basin. We recommend to additionally collect night samples to decrease larval escapement rates and to compare night versus day catches to further investigate the influence of daily migration in the neustonic larval fish in the area.

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“…Migrating organisms include phyto-and zooplankton [7,8], fish [9,10], cephalopods, seabirds, mammals, and even reptiles [11]. Most migrations have been related to the daily light cycle but also to the lunar [12] and seasonal periods [13].…”

Section: Introductionmentioning

confidence: 99%

Trophic Diversity of Plankton in the Epipelagic and Mesopelagic Layers of the Tropical and Equatorial Atlantic Determined with Stable Isotopes

Bode

Hernández‐León

2018

Diversity

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Plankton living in the deep ocean either migrate to the surface to feed or feed in situ on other organisms and detritus. Planktonic communities in the upper 800 m of the tropical and equatorial Atlantic were studied using the natural abundance of stable carbon and nitrogen isotopes to identify their food sources and trophic diversity. Seston and zooplankton (>200 µm) samples were collected with Niskin bottles and MOCNESS nets, respectively, in the epipelagic (0-200 m), upper mesopelagic (200-500 m), and lower mesopelagic layers (500-800 m) at 11 stations. Food sources for plankton in the productive zone influenced by the NW African upwelling and the Canary Current were different from those in the oligotrophic tropical and equatorial zones. In the latter, zooplankton collected during the night in the mesopelagic layers was enriched in heavy nitrogen isotopes relative to day samples, supporting the active migration of organisms from deep layers. Isotopic niches showed also zonal differences in size (largest in the north), mean trophic diversity (largest in the tropical zone), food sources, and the number of trophic levels (largest in the equatorial zone). The observed changes in niche size and overlap (up to 71% between the mesopelagic layers but <50% between the epipelagic and upper mesopelagic layers) support the prevalence of in situ feeding at deep layers in tropical and equatorial zooplankton.

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The contribution of migratory mesopelagic fishes to neuston fish assemblages across the Atlantic, Indian and Pacific Oceans

Cited by 34 publications

References 40 publications

Identifying important species that amplify or mitigate the interactive effects of human impacts to marine food webs

Identifying important species that amplify or mitigate the interactive effects of human impacts to marine food webs

Seasonal variability of ichthyoneuston assemblage on the continental shelf and slope of the Southwest Atlantic Ocean, Brazil (20°–23°S)

Trophic Diversity of Plankton in the Epipelagic and Mesopelagic Layers of the Tropical and Equatorial Atlantic Determined with Stable Isotopes

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