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https://www.readbyqxmd.com/read/28099761/size-structuring-and-allometric-scaling-relationships-in-coral-reef-fishes
#1
Jillian C Dunic, Julia K Baum
Temperate marine fish communities are often size structured, with predators consuming increasingly larger prey and feeding at higher trophic levels as they grow. Gape limitation and ontogenetic diet shifts are key mechanisms by which size structuring arises in these communities. Little is known, however, about size structuring in coral reef fishes. Here, we aimed to advance understanding of size structuring in coral reef food webs by examining the evidence for these mechanisms in two groups of reef predators...
January 18, 2017: Journal of Animal Ecology
https://www.readbyqxmd.com/read/28093608/spatiotemporal-drivers-of-energy-expenditure-in-a-coastal-marine-fish
#2
Jacob W Brownscombe, Steven J Cooke, Andy J Danylchuk
Animal behavior and energy expenditure often vary significantly across the landscape, and quantifying energy expenditure over space and time provides mechanistic insight into ecological dynamics. Yet, spatiotemporal variability in energy expenditure has rarely been explored in fully aquatic species such as fish. Our objective was to quantify spatially explicit energy expenditure for a tropical marine teleost fish, bonefish (Albula vulpes), to examine how bonefish energetics vary across landscape features and temporal factors...
January 16, 2017: Oecologia
https://www.readbyqxmd.com/read/28091580/population-expansions-dominate-demographic-histories-of-endemic-and-widespread-pacific-reef-fishes
#3
Erwan Delrieu-Trottin, Stefano Mona, Jeffrey Maynard, Valentina Neglia, Michel Veuille, Serge Planes
Despite the unique nature of endemic species, their origin and population history remain poorly studied. We investigated the population history of 28 coral reef fish species, close related, from the Gambier and Marquesas Islands, from five families, with range size varying from widespread to small-range endemic. We analyzed both mitochondrial and nuclear sequence data using neutrality test and Bayesian analysis (EBSP and ABC). We found evidence for demographic expansions for most species (24 of 28), irrespective of range size, reproduction strategy or archipelago...
January 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28089513/human-disruption-of-coral-reef-trophic-structure
#4
Nicholas A J Graham, Tim R McClanahan, M Aaron MacNeil, Shaun K Wilson, Joshua E Cinner, Cindy Huchery, Thomas H Holmes
The distribution of biomass among trophic levels provides a theoretical basis for understanding energy flow and the hierarchical structure of animal communities. In the absence of energy subsidies [1], bottom-heavy trophic pyramids are expected to predominate, based on energy transfer efficiency [2] and empirical evidence from multiple ecosystems [3]. However, the predicted pyramid of biomass distribution among trophic levels may be disrupted through trophic replacement by alternative organisms in the ecosystem, trophic cascades, and humans preferentially impacting specific trophic levels [4-6]...
January 9, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/28088368/pollutants-and-biomarker-responses-in-two-reef-fish-species-haemulon-aurolineatum-and-ocyurus-chrysurus-in-the-southern-gulf-of-mexico
#5
Gerardo Gold-Bouchot, J Rubio-Piña, J Montero-Muñoz, N Ramirez-Miss, A Echeverría-García, V Patiño-Suarez, C A Puch-Hau, O Zapata-Pérez
The environmental quality differences between two groups of reefs in the Veracruz Reef System were evaluated. The North group of reefs is very close to Veracruz, an urban and port zone, whereas the South group is more isolated, with minor anthropogenic disturbances. To prove the hypothesis that the North group is more affected by anthropogenic activities, the concentrations of hydrocarbons in liver, metals and metalloids such as Se, As, Ba, Cd, Hg and V in muscle, and PAH metabolites in bile were evaluated, and related to biomarkers (transcript abundance of cytochrome P4501A, Vitellogenin, and Glutathione-S-transferase) in two species of fish: Haemulon aurolineatum and Ocyurus chysurus...
January 11, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28073555/molecular-and-phylogenetic-characterization-of-ostreopsis-dinophyceae-and-the-description-of-a-new-species-ostreopsis-rhodesae-sp-nov-from-a-subtropical-australian-lagoon
#6
Arjun Verma, Mona Hoppenrath, Juan José Dorantes-Aranda, D Tim Harwood, Shauna A Murray
Cryptic and pseudo-cryptic species are common amongst marine phytoplankton, and may cause misleading inferences of ecological and physiological data of plankton community studies. Deciphering the diversity and distribution of species of the benthic dinoflagellate Ostreopsis is one example, as there are many morphologically indistinct clades that differ greatly genetically and toxicologically from one another. In this study, a new species, Ostreopsis rhodesae from the southern Great Barrier Reef was described...
December 2016: Harmful Algae
https://www.readbyqxmd.com/read/28072444/predator-effects-on-reef-fish-settlement-depend-on-predator-origin-and-recruit-density
#7
Cassandra E Benkwitt
During major life-history transitions animals often experience high mortality rates due to predation, making predator avoidance particularly advantageous during these times. There is mixed evidence from a limited number of studies, however, regarding how predator presence influences settlement of coral-reef fishes and it is unknown how other potentially mediating factors, including predator origin (native versus non-native) or interactions among conspecific recruits, mediate the non-consumptive effects of predators on reef fish settlement...
January 10, 2017: Ecology
https://www.readbyqxmd.com/read/28070307/global-ecological-success-of-thalassoma-fishes-in-extreme-coral-reef-habitats
#8
Christopher J Fulton, Peter C Wainwright, Andrew S Hoey, David R Bellwood
Phenotypic adaptations can allow organisms to relax abiotic selection and facilitate their ecological success in challenging habitats, yet we have relatively little data for the prevalence of this phenomenon at macroecological scales. Using data on the relative abundance of coral reef wrasses and parrotfishes (f. Labridae) spread across three ocean basins and the Red Sea, we reveal the consistent global dominance of extreme wave-swept habitats by fishes in the genus Thalassoma, with abundances up to 15 times higher than any other labrid...
January 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28056064/marine-reserve-targets-to-sustain-and-rebuild-unregulated-fisheries
#9
Nils C Krueck, Gabby N Ahmadia, Hugh P Possingham, Cynthia Riginos, Eric A Treml, Peter J Mumby
Overfishing threatens the sustainability of coastal marine biodiversity, especially in tropical developing countries. To counter this problem, about 200 governments worldwide have committed to protecting 10%-20% of national coastal marine areas. However, associated impacts on fisheries productivity are unclear and could weaken the food security of hundreds of millions of people who depend on diverse and largely unregulated fishing activities. Here, we present a systematic theoretic analysis of the ability of reserves to rebuild fisheries under such complex conditions, and we identify maximum reserve coverages for biodiversity conservation that do not impair long-term fisheries productivity...
January 2017: PLoS Biology
https://www.readbyqxmd.com/read/28054550/the-emergent-role-of-small-bodied-herbivores-in-pre-empting-phase-shifts-on-degraded-coral-reefs
#10
Caitlin D Kuempel, Andrew H Altieri
Natural and anthropogenic stressors can cause phase shifts from coral-dominated to algal-dominated states. In the Caribbean, over-fishing of large herbivorous fish and disease among the long-spined urchin, Diadema, have facilitated algal growth on degraded reefs. We found that diminutive species of urchin and parrotfish, which escaped die-offs and fishing pressure, can achieve abundances comparable to total herbivore biomass on healthier, protected reefs, and exert sufficient grazing function to pre-empt macroalgal dominance following mass coral mortality...
January 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28046102/the-effects-of-algal-turf-sediments-and-organic-loads-on-feeding-by-coral-reef-surgeonfishes
#11
Sterling B Tebbett, Christopher H R Goatley, David R Bellwood
Herbivorous and detritivorous fishes interact closely with the epilithic algal matrix (EAM) on coral reefs. While sediment and organic detrital loads within the EAM might influence this interaction, the responses of functionally distinct fishes to changing sediment and organic loads have not been investigated. Aquarium based feeding trials were performed to assess how different sediment and organic loads affected feeding by the highly abundant surgeonfishes, Ctenochaetus striatus, a detritivore, and Acanthurus nigrofuscus, a herbivore...
2017: PloS One
https://www.readbyqxmd.com/read/28034494/fighting-nemo-effect-of-17%C3%AE-ethinylestradiol-ee2-on-aggressive-behavior-and-social-hierarchy-of-the-false-clown-anemonefish-amphiprion-ocellaris
#12
Te-Hao Chen, Chun-Yu Hsieh
Aggressive behavior is crucial for maintaining social hierarchy in anemonefish. Endocrine disrupting chemicals such as EE2 may affect fish social hierarchy via disrupting their aggression. In this study, we aimed to characterize the effects of 17α-ethinylestradiol (EE2) on aggressive behavior and social hierarchy in the false clown anemonefish (Amphiprion ocellaris). In the laboratory experiment, juvenile anemonefish were randomly distributed to separated tanks to form small colonies of three individuals and were fed with EE2-dosed diet (100ng/g food) or a control diet for 90d...
December 26, 2016: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28005174/predator-identity-and-time-of-day-interact-to-shape-the-risk-reward-trade-off-for-herbivorous-coral-reef-fishes
#13
Laura B Catano, Mark B Barton, Kevin M Boswell, Deron E Burkepile
Non-consumptive effects (NCEs) of predators occur as prey alters their habitat use and foraging decisions to avoid predation. Although NCEs are recognized as being important across disparate ecosystems, the factors influencing their strength and importance remain poorly understood. Ecological context, such as time of day, predator identity, and prey condition, may modify how prey species perceive and respond to risk, thereby altering NCEs. To investigate how predator identity affects foraging of herbivorous coral reef fishes, we simulated predation risk using fiberglass models of two predator species (grouper Mycteroperca bonaci and barracuda Sphyraena barracuda) with different hunting modes...
December 22, 2016: Oecologia
https://www.readbyqxmd.com/read/28000368/extensions-of-island-biogeography-theory-predict-the-scaling-of-functional-trait-composition-with-habitat-area-and-isolation
#14
Claire Jacquet, David Mouillot, Michel Kulbicki, Dominique Gravel
The Theory of Island Biogeography (TIB) predicts how area and isolation influence species richness equilibrium on insular habitats. However, the TIB remains silent about functional trait composition and provides no information on the scaling of functional diversity with area, an observation that is now documented in many systems. To fill this gap, we develop a probabilistic approach to predict the distribution of a trait as a function of habitat area and isolation, extending the TIB beyond the traditional species-area relationship...
December 21, 2016: Ecology Letters
https://www.readbyqxmd.com/read/27997050/why-uv-and-red-vision-are-important-for-damselfish-pomacentridae-structural-and-expression-variation-in-opsin-genes
#15
Sara M Stieb, Fabio Cortesi, Lorenz Sueess, Karen L Carleton, Walter Salzburger, N Justin Marshall
Coral reefs belong to the most diverse ecosystems on our planet. The diversity in coloration and lifestyles of coral reef fishes makes them a particularly promising system to study the role of visual communication and adaptation. Here, we investigated the evolution of visual pigment genes (opsins) in damselfish (Pomacentridae), and examined whether structural and expression variation of opsins can be linked to ecology. Using DNA sequence data of a phylogenetically representative set of 31 damselfish species, we show that all but one visual opsin are evolving under positive selection...
December 20, 2016: Molecular Ecology
https://www.readbyqxmd.com/read/27989632/molecular-phylogeny-and-patterns-of-diversification-in-syngnathid-fishes
#16
Healy Hamilton, Norah Saarman, Graham Short, Anna B Sellas, Beth Moore, Tinya Hoang, Christopher L Grace, Martin Gomon, Karen Crow, W Brian Simison
The family Syngnathidae is a large and diverse clade of morphologically unique bony fishes, with 57 genera and 300 described species of seahorses, pipefishes, pipehorses, and seadragons. They primarily inhabit shallow coastal waters in temperate and tropical oceans, and are characterized by a fused jaw, male brooding, and extraordinary crypsis. Phylogenetic relationships within the Syngnathidae remain poorly resolved due to lack of generic taxon sampling, few diagnostic morphological characters, and limited molecular data...
October 29, 2016: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/27988784/erratum-%C3%A2-manon-fourri%C3%A3-re-h%C3%A3-ctor-reyes-bonilla-arturo-ayala-bocos-james-ketchum-amp-juan-carlos-ch%C3%A3-vez-comparan-2016-checklist-and-analysis-of-completeness-of-the-reef-fish-fauna-of-the-revillagigedo-archipelago-mexico-i-zootaxa-i-4150-4-436-466
#17
Manon Fourriére, Héctor Reyes-Bonilla, Arturo Ayala-Bocos, James Ketchum, Juan Carlos Chávez-Comparan
No abstract text is available yet for this article.
November 7, 2016: Zootaxa
https://www.readbyqxmd.com/read/27988769/hidden-diversity-in-deep-water-bandfishes-review-of-owstonia-with%C3%A2-descriptions-of-twenty-one-new-species-teleostei-cepolidae-owstoniinae
#18
William F Smith-Vaniz, G David Johnson
The bandfish family Cepolidae, comprising the subfamilies Owstoniinae and Cepolinae, is characterized, and defining characters of the three groups are identified and discussed. Characters of larvae of both subfamilies are described and illustrated. Six nominal genera of owstoniines had been proposed by various authors, but we recognize only Owstonia Tanaka. Utility of selected identification characters of the genus are discussed. Differences in lateral-line patterns have been the primary character used by some recent authors for recognition of two owstoniine genera, with Sphenanthias Weber possessing the plesiomorphic lateral-line condition...
November 8, 2016: Zootaxa
https://www.readbyqxmd.com/read/27974520/recombination-in-the-eggs-and-sperm-in-a-simultaneously-hermaphroditic-vertebrate
#19
L Theodosiou, W O McMillan, O Puebla
When there is no recombination (achiasmy) in one sex, it is in the heterogametic one. This observation is so consistent that it constitutes one of the few patterns in biology that may be regarded as a 'rule' and Haldane (Haldane 1922 J. Genet. 12, 101-109. (doi:10.1007/BF02983075)) proposed that it might be driven by selection against recombination in the sex chromosomes. Yet differences in recombination rates between the sexes (heterochiasmy) have also been reported in hermaphroditic species that lack sex chromosomes...
December 14, 2016: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/27959907/assessing-caribbean-shallow-and-mesophotic-reef-fish-communities-using-baited-remote-underwater-video-bruv-and-diver-operated-video-dov-survey-techniques
#20
Dominic A Andradi-Brown, Consuelo Macaya-Solis, Dan A Exton, Erika Gress, Georgina Wright, Alex D Rogers
Fish surveys form the backbone of reef monitoring and management initiatives throughout the tropics, and understanding patterns in biases between techniques is crucial if outputs are to address key objectives optimally. Often biases are not consistent across natural environmental gradients such as depth, leading to uncertainty in interpretation of results. Recently there has been much interest in mesophotic reefs (reefs from 30-150 m depth) as refuge habitats from fishing pressure, leading to many comparisons of reef fish communities over depth gradients...
2016: PloS One
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