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495 results for “Reef Fishes”
Patterns of reef fish taxonomic and functional diversity in the Eastern Tropical Pacific
<p class="MsoNormal">A core challenge in ecology is identifying the factors that determine species distribution and functional diversity of species assemblages. Reef fish are the most diverse group of vertebrates, form taxonomically rich and functionally diverse communities and represent a key source of food for humans. We examine regional distribution patterns of reef fish species richness and functional diversity and investigate how these are determined by historical, biogeographic, energetic, and anthropogenic factors. We compiled data from 3,312 underwater visual censuses (UVCs) performed at 122 locations comprising rocky and coral reefs along of the Eastern Tropical Pacific (ETP). We used Generalized Linear Mixed-effects Models (GLMM) implemented in a Bayesian framework to investigate whether distance from quaternary refugia, distance from mainland, shelf area, primary productivity, sea surface temperature, human population gravity and conservation status influence reef fish species richness and functional diversity in the ETP. Species richness and functional richness (FRic) peaked towards the center of the ETP and our null model suggests that FRic followed a spatial pattern than would be predicted by species richness. Additionally, functional evenness (FEve) was highest at higher latitudes whereas functional dispersion (FDis) was homogeneous throughout the ETP. Species richness was negatively influenced by shelf area and distance from the mainland but positively influenced by sea surface temperature and conservation status. FEve was influenced by human population gravity and FDis by shelf area, respectively. Reef fish<strong> </strong>species richness and functional diversity in the ETP exhibited a strong division within the region mainly mediated by sea surface temperature and human population gravity. Our results also suggest that dominant species in large areas share more common traits than dominant species in small areas. This study provides previously unknown regional patterns of reef fish functional diversity and new insights into how historical, biogeographic, energetic, and anthropogenic factors influence complementary biodiversity facets.</p>
Winners and losers of reef flattening: An assessment of coral reef fish species and traits
<p>Anthropogenic stressors are causing widespread coral mortality, leading to loss of coral cover and decreased structural complexity that threatens reef biodiversity, functioning, and ecosystem services. Reef fishes are intimately linked to coral reef complexity, but we lack a generic understanding of which species are particularly affected by reef flattening and what traits make them susceptible. We used extensive species- and trait-based analyses to build a framework for western Atlantic fish association with both structural complexity and coral cover to better understand the implications of reef degradation. These analyses also investigated the relative importance of live coral versus the value of the structure it provides to reef fishes. We modeled how 25 biophysical and anthropogenic factors correlated with the densities of 109 fish species across 3292 Floridian reef sites. The importance of a metric of structural complexity and coral cover to the abundance of each species was then isolated. Species with positive associations were categorized as likely future 'losers' and negative associations as 'winners'. We showed that structure loss was more critical than loss of coral cover, as 53% of species were predicted as losers on low-relief reefs, while only 11% were losers with decreased coral cover. We found morphological, behavioral, and ecological traits mediate species' responses to reef degradation, and shared evolutionary history is unlikely to be a strong driver of trait relationships. Eight traits explained 79.7% of variation in species' associations with relief and six traits explained 27.8% of associations with coral cover. Smaller, streamlined, habitat and trophic generalists are more likely winners on flattened reefs and large-bodied predators and species with deeper bodies and intermediate caudal fin shapes are likely losers. Identifying these important traits provides insight into mechanisms that may link fish and complex habitats, which allows us to better predict assemblage-wide responses to future reef flattening.</p>
TimeFISH: Long-term assessment of reef fish assemblages in a transition zone in the Southwestern Atlantic
<p>The TimeFish database provides the first public time-series dataset on reef fish assemblages in the Southwestern Atlantic (SWA), comprising 15 years of data (2007-2022) based on standardized Underwater Visual Censuses (UVCs). The rocky reefs covered by our dataset are influenced by pronounced seasonal cycles of ocean temperatures with warm tropical waters from the Brazil Current in the summer (~27°C) and colder waters from the La Plata River Plume discharge and upwelling from the South Atlantic Central Water in the winter (~18°C). These oceanographic conditions characterize this area as the southernmost tropical-subtropical climatic transition zone in the Atlantic Ocean. As a result, reef fish assemblages comprise both tropical and subtropical species. All records included in TimeFish were collected using UVCs, a non-destructive method that allows the estimation of fish species richness, abundance, and body size distributions. UVCs were performed through 40 m2 belt transects by scuba diving in nine locations along the southern Brazilian coast (25°S – 29°S). Four of these locations lie within the boundaries of the no-entry Arvoredo Marine Biological Reserve, where fishing and recreational activities are forbidden, and the remaining locations are unprotected from these activities. During each belt transect, a diver swam at a constant depth above and parallel to the reef, identifying fish species, counting the number of individuals, and estimating the total body length (Lt in cm) of all detected individuals. All fish individuals in the water column (up to 2 m above the substratum) and at the bottom were targeted. A total of 202,965 individuals belonging to 163 reef fish species and 53 families were recorded across 1,857 UVCs. All survey campaigns were funded by either public or mixed capital (private-public) sources, including seven grants from the Brazilian federal and Santa Catarina state government. Part of the data have already been used in multiple MSc and Ph.D. theses and scientific articles. TimeFISH represents an important contribution for future studies aiming to examine temporal and spatial variations of reef fish assemblages in transition zones. No copyright restrictions apply to the use of this data set, other than citing this publication.</p>
Data from: The rise of biting during the cenozoic fueled reef fish body shape diversification
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Impact of artificial reef deployment on reef fish movement and community assemblages
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Multiple rod layers increase the speed and sensitivity of vision in nocturnal reef fishes
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Patterns of reef fish taxonomic and functional diversity in the Eastern Tropical Pacific
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The macroecology of reef fish agonistic behaviour
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Data from: Larval developmental histories, phenotypes, and stage-specific fitness of a temperate reef fish (<em>Forsterygion lapillum</em>)
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Species delimitation in the Eviota sigillata species complex, a widely distributed group of cryptobenthic coral reef fishes
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Data from: Diet reveals links between morphology and foraging in a cryptic temperate reef fish
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Data from: Effects of hypoxia and ocean acidification on the upper thermal niche boundaries of coral reef fishes
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Estimating enhanced fish production on restored shellfish reefs using automated data collection from underwater videos
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Mixed-species groups of herbivorous reef fish show variable responses to ecosystem perturbations in the Lakshadweep Islands, India
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Using standardized fish-specific autonomous reef monitoring structures (FARMS) to quantify cryptobenthic fish communities
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Data from: Geographic breaks and seascape features shape diversification in cryptobenthic reef fishes
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Data from: Dietary partitioning among three cryptobentic reef fish mesopredators revealed by visual analysis, metabarcoding of gut content, and stable isotope analysis
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Post-larval processes reduce the diversity of coral reef fish communities
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Data from: A closer examination of the 'abundant center' hypothesis for reef fishes
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Data for: Seasonal variability in resilience of a coral reef fish to marine heatwaves and hypoxia
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