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https://www.readbyqxmd.com/read/29773843/loss-of-live-coral-compromises-predator-avoidance-behaviour-in-coral-reef-damselfish
#1
Lisa Boström-Einarsson, Mary C Bonin, Philip L Munday, Geoffrey P Jones
Tropical reefs have experienced an unprecedented loss of live coral in the past few decades and the biodiversity of coral-dependent species is under threat. Many reef fish species decline in abundance as coral cover is lost, yet the mechanisms responsible for these losses are largely unknown. A commonly hypothesised cause of fish decline is the loss of shelter space between branches as dead corals become overgrown by algae. Here we tested this hypothesis by quantifying changes in predator-avoidance behaviour of a common damselfish, Pomacentrus moluccensis, before and after the death of their coral colony...
May 17, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29750192/attenuating-effects-of-ecosystem-management-on-coral-reefs
#2
Robert S Steneck, Peter J Mumby, Chancey MacDonald, Douglas B Rasher, George Stoyle
Managing diverse ecosystems is challenging because structuring drivers are often processes having diffuse impacts that attenuate from the people who were "managed" to the expected ecosystem-wide outcome. Coral reef fishes targeted for management only indirectly link to the ecosystem's foundation (reef corals). Three successively weakening interaction tiers separate management of fishing from coral abundance. We studied 12 islands along the 700-km eastern Caribbean archipelago, comparing fished and unfished coral reefs...
May 2018: Science Advances
https://www.readbyqxmd.com/read/29745163/-species-composition-and-distribution-patterns-of-ichthyoplankton-within-and-outside-artificial-reefs-in-qingshan-bay-qingdao-china
#3
Shu Xin Guo, Dong Kui Gao, Xiu Mei Zhang, Wen Tao Li, Pei Dong Zhang
To assess the fish attraction and shelter effects of the artificial reefs in Qingshan Bay of Qingdao, the species composition and distribution patterns of ichthyoplankton in artificial reefs were investigated using vertical and horizontal tows in 2014 and 2015. In total, 7306 fish eggs and 52 fish larvae, belonging to 4 orders, 9 families, 11 genera and 12 species, were collected during 7 cruises in spring, summer and autumn of 2014. In 2015, 10373 eggs and 159 fish larvae, belonging to 6 orders, 11 families, 14 genera and 15 species, were collected in the same period as in 2014...
June 18, 2017: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29743658/monoaminergic-levels-at-the-forebrain-and-diencephalon-signal-for-the-occurrence-of-mutualistic-and-conspecific-engagement-in-client-reef-fish
#4
Murilo S Abreu, João P M Messias, Per-Ove Thörnqvist, Svante Winberg, Marta C Soares
Social interactions are commonly found among fish as in mammals and birds. While most animals interact socially with conspecifics some however are also frequently and repeatedly observed to interact with other species (i.e. mutualistic interactions). This is the case of the (so-called) fish clients that seek to be cleaned by other fish (the cleaners). Clients face an interesting challenge: they raise enough motivation to suspend their daily activities as to selectively visit and engage in interactions with cleaners...
May 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29737979/time-series-dataset-of-fish-assemblages-near-thermal-discharges-at-nuclear-power-plants-in-northern-taiwan
#5
Hungyen Chen, Ching-Yi Chen, Kwang-Tsao Shao
Long-term time series datasets with consistent sampling methods are rather rare, especially the ones of non-target coastal fishes. Here we described a long-term time series dataset of fish collected by trammel net fish sampling and observed by an underwater diving visual census near the thermal discharges at two nuclear power plants on the northern coast of Taiwan. Both experimental and control stations of these two investigations were monitored four times per year in the surrounding seas at both plants from 2000 to 2017...
May 8, 2018: Scientific Data
https://www.readbyqxmd.com/read/29736999/the-hidden-half-ecology-and-evolution-of-cryptobenthic-fishes-on-coral-reefs
#6
Simon J Brandl, Christopher H R Goatley, David R Bellwood, Luke Tornabene
Teleost fishes are the most diverse group of vertebrates on Earth. On tropical coral reefs, their species richness exceeds 6000 species; one tenth of total vertebrate biodiversity. A large proportion of this diversity is composed of cryptobenthic reef fishes (CRFs): bottom-dwelling, morphologically or behaviourally cryptic species typically less than 50 mm in length. Yet, despite their diversity and abundance, these fishes are both poorly defined and understood. Herein we provide a new quantitative definition and synthesise current knowledge on the diversity, distribution and life history of CRFs...
May 7, 2018: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/29729184/fish-predators-reduce-kelp-frond-loss-via-a-trait-mediated-trophic-cascade
#7
Miranda B Haggerty, Todd W Anderson, Jeremy D Long
Although trophic cascades were originally believed to be driven only by predators eating prey, there is mounting evidence that such cascades can be generated in large part via non-consumptive effects. This is especially important in cascades affecting habitat-forming foundation species that in turn, influence associated communities. Here, we use laboratory and field experiments to identify a trait-mediated indirect interaction between predators and an abundant kelp in a marine temperate reef system. Predation risk from a microcarnivorous fish, the señorita, suppressed grazing by the host-specific seaweed limpet, which in turn, influenced frond loss of the habitat-forming feather boa kelp...
May 5, 2018: Ecology
https://www.readbyqxmd.com/read/29726925/ca-endozoicomonas-cretensis-a-novel-fish-pathogen-characterised-by-genome-plasticity
#8
Weihong Qi, Maria Chiara Cascarano, Ralph Schlapbach, Pantelis Katharios, Lloyd Vaughan, Helena M B Seth-Smith
Endozoicomonas bacteria are generally beneficial symbionts of diverse marine invertebrates including reef-building corals, sponges, sea squirts, sea slugs, molluscs and Bryozoans. In contrast, the recently reported Ca. Endozoicomonas cretensis was identified as a vertebrate pathogen, causing epitheliocystis in fish larvae resulting in massive mortality. Here we described the Ca. E. cretensis draft genome, currently undergoing genome decay as evidenced by massive insertion sequence (IS element) expansion and pseudogene formation...
May 3, 2018: Genome Biology and Evolution
https://www.readbyqxmd.com/read/29726245/-feeding-ecology-of-conger-myriaster-and-structure-of-the-food-webs-in-artificial-reef-zone-laoshan-bay-china
#9
Hong Yan Liu, Tong Tong Sun, Xiao Qi Zeng, Pei Dong Zhang, Wen Tao Li, Xiu Mei Zhang
Based on cage net and longline fishing surveys in Laoshan Bay, China, from April 2015 to January 2017, a total of 279 Conger myriaster stomach samples were analyzed to study their feeding ecology, including diet composition, feeding type, feeding grade, feeding intensity, trophic niche, and trophic level. The stomach content analysis of nine key fish species (including Sebastes schlegelii, Hexagrammos otakii, Hexagrammos agrammus, Sebastiscus mamoratus, Lateolabrax maculatus, etc.), were conducted to examine the food webs in artificial reef zone...
April 2018: Ying Yong Sheng Tai Xue Bao, the Journal of Applied Ecology
https://www.readbyqxmd.com/read/29721284/the-role-of-the-reef-flat-in-coral-reef-trophodynamics-past-present-and-future
#10
David R Bellwood, Sterling B Tebbett, Orpha Bellwood, Michalis Mihalitsis, Renato A Morais, Robert P Streit, Christopher J Fulton
The reef flat is one of the largest and most distinctive habitats on coral reefs, yet its role in reef trophodynamics is poorly understood. Evolutionary evidence suggests that reef flat colonization by grazing fishes was a major innovation that permitted the exploitation of new space and trophic resources. However, the reef flat is hydrodynamically challenging, subject to high predation risks and covered with sediments that inhibit feeding by grazers. To explore these opposing influences, we examine the Great Barrier Reef (GBR) as a model system...
April 2018: Ecology and Evolution
https://www.readbyqxmd.com/read/29719007/gear-and-survey-efficiency-of-patent-tongs-for-oyster-populations-on-restoration-reefs
#11
David M Schulte, Romuald N Lipcius, Russell P Burke
Surveys of restored oyster reefs need to produce accurate population estimates to assess the efficacy of restoration. Due to the complex structure of subtidal oyster reefs, one effective and efficient means to sample is by patent tongs, rather than SCUBA, dredges, or bottom cores. Restored reefs vary in relief and oyster density, either of which could affect survey efficiency. This study is the first to evaluate gear (the first full grab) and survey (which includes selecting a specific half portion of the first grab for further processing) efficiencies of hand-operated patent tongs as a function of reef height and oyster density on subtidal restoration reefs...
2018: PloS One
https://www.readbyqxmd.com/read/29712839/habitat-degradation-negatively-affects-auditory-settlement-behavior-of-coral-reef-fishes
#12
Timothy A C Gordon, Harry R Harding, Kathryn E Wong, Nathan D Merchant, Mark G Meekan, Mark I McCormick, Andrew N Radford, Stephen D Simpson
Coral reefs are increasingly degraded by climate-induced bleaching and storm damage. Reef recovery relies on recruitment of young fishes for the replenishment of functionally important taxa. Acoustic cues guide the orientation, habitat selection, and settlement of many fishes, but these processes may be impaired if degradation alters reef soundscapes. Here, we report spatiotemporally matched evidence of soundscapes altered by degradation from recordings taken before and after recent severe damage on Australia's Great Barrier Reef...
April 30, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29707432/shifting-reef-fish-assemblages-along-a-depth-gradient-in-pohnpei-micronesia
#13
Richard R Coleman, Joshua M Copus, Daniel M Coffey, Robert K Whitton, Brian W Bowen
Mesophotic coral ecosystems (MCEs) continue to be understudied, especially in island locations spread across the Indo-Pacific Ocean. Pohnpei is the largest island in the Federated States of Micronesia, with a well-developed barrier reef, and steep slopes that descend to more than 1,000 m. Here we conducted visual surveys along a depth gradient of 0 to 60 m in addition to video surveys that extend to 130 m, with 72 belt transects and 12 roving surveys using closed-circuit rebreathers, to test for changes in reef fish composition from shallow to mesophotic depths...
2018: PeerJ
https://www.readbyqxmd.com/read/29690450/three-new-species-of-parapercis-perciformes-pinguipedidae-and-first-records-of-p-muronis-tanaka-1918-and-p-rubromaculata-ho-chang-shao-2012-from-australia
#14
Jeffrey W Johnson, Jessica Worthington Wilmer
Three new species of pinguipedid fishes from northern Australia are described based on specimens collected by deep water demersal trawling. Parapercis algrahami sp. nov. is recorded from off Dunk Island, Qld, south to Newcastle, NSW, in 67-333 m. It is distinct in having five narrow transverse dark bars across the upper body and a dark spot dorsally on the caudal-fin base, 6 canine teeth in outer row at front of lower jaw, palatines with 1-2 rows of teeth, and predorsal scales extending far forward on the nape to the posterior portion of the interorbital region...
March 1, 2018: Zootaxa
https://www.readbyqxmd.com/read/29687197/influence-of-fishing-activity-over-the-marine-debris-composition-close-to-coastal-jetty
#15
Eduardo G G Farias, Paulo R Preichardt, David V Dantas
Worldwide, the marine debris emissions have been provoking impacts in ecosystems, generating massive mortality of different species with commercial interest. In South America, we have a lack of studies to verify the marine debris composition in transitional environments such as adjacent regions of coastal jetties. These are hydraulic engineering constructions used to maintain the navigation channel access between the sea-estuarine interface and are also used by teleost fishes, crustaceans, and mollusks like artificial shelters (reefs), being excellent fishing grounds...
April 23, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29682410/challenges-of-transferring-models-of-fish-abundance-between-coral-reefs
#16
Ana M M Sequeira, Camille Mellin, Hector M Lozano-Montes, Jessica J Meeuwig, Mathew A Vanderklift, Michael D E Haywood, Russell C Babcock, M Julian Caley
Reliable abundance estimates for species are fundamental in ecology, fisheries, and conservation. Consequently, predictive models able to provide reliable estimates for un- or poorly-surveyed locations would prove a valuable tool for management. Based on commonly used environmental and physical predictors, we developed predictive models of total fish abundance and of abundance by fish family for ten representative taxonomic families for the Great Barrier Reef (GBR) using multiple temporal scenarios. We then tested if models developed for the GBR (reference system) could predict fish abundances at Ningaloo Reef (NR; target system), i...
2018: PeerJ
https://www.readbyqxmd.com/read/29680564/status-of-coral-reefs-of-upolu-independent-state-of-samoa-in-the-south-west-pacific-and-recommendations-to-promote-resilience-and-recovery-of-coastal-ecosystems
#17
Maren Ziegler, Gaëlle Quéré, Jean-François Ghiglione, Guillaume Iwankow, Valérie Barbe, Emilie Boissin, Patrick Wincker, Serge Planes, Christian R Voolstra
Coral reef ecosystems worldwide are immediately threatened by the impacts of climate change. Here we report on the condition of coral reefs over 83 km of coastline at the island of Upolu, Samoa in the remote South West Pacific in 2016 during the Tara Pacific Expedition. Despite the distance to large urban centers, coral cover was extremely low (<1%) at approximately half of the sites and below 10% at 78% of sites. Two reef fish species, Acanthurus triostegus and Zanclus cornutus, were 10% smaller at Upolu than at neighboring islands...
April 2018: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29675668/mercury-biomagnification-through-a-coral-reef-ecosystem
#18
Darren G Rumbold, Christopher T Lienhardt, Michael L Parsons
Total mercury (Hg) and stable isotopes of nitrogen and carbon were determined in the muscle tissue of 50 species of fishes and invertebrates collected at two sites along the Florida reef tract from April 2012 to December 2013. The objective was to test the hypothesis that high biodiversity in coral reefs leading to complex food webs with increased lateral links reduces biomagnification. However, Hg levels ranged as high 6.84 mg/kg. Interestingly, it was not highest in great barracuda (Sphyraena barracuda), considered the top predatory fish, but instead in small porkfish (Anisotremus virginicus), possibly due to their role as a cleaner fish...
April 19, 2018: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29675141/differential-hypomethylation-of-the-repetitive-tol2-alu-rich-sequences-in-the-genome-of-bodianus-species-labriformes-labridae
#19
Clóvis C Motta-Neto, André Marques, Gideão W W F Costa, Marcelo B Cioffi, Luiz A C Bertollo, Rodrigo X Soares, Kátia C Scortecci, Roberto F Artoni, Wagner F Molina
Representatives of the order Labriformes show karyotypes of extreme conservatism together with others with high chromosomal diversification. However, the cytological characterization of epigenetic modifications remains unknown for the majority of the species. In the family Labridae, the most abundant fishes on tropical reefs, the genomes of the genus Bodianus Bloch, 1790 have been characterized by the occurrence of a peculiar chromosomal region, here denominated BOD. This region is exceptionally decondensed, heterochromatic, argentophilic, GC-neutral and, in contrast to classical secondary constrictions, shows no signals of hybridization with 18S rDNA probes...
2018: Comparative Cytogenetics
https://www.readbyqxmd.com/read/29665418/a-continuous-genome-assembly-of-the-corkwing-wrasse-symphodus-melops
#20
Morten Mattingsdal, Sissel Jentoft, Ole K Tørresen, Halvor Knutsen, Michael M Hansen, Joana I Robalo, Zuzanna Zagrodzka, Carl André, Enrique Blanco Gonzalez
The wrasses (Labridae) are one of the most successful and species-rich families of the Perciformes order of teleost fish. Its members display great morphological diversity, and occupy distinct trophic levels in coastal waters and coral reefs. The cleaning behaviour displayed by some wrasses, such as corkwing wrasse (Symphodus melops), is of particular interest for the salmon aquaculture industry to combat and control sea lice infestation as an alternative to chemicals and pharmaceuticals. There are still few genome assemblies available within this fish family for comparative and functional studies, despite the rapid increase in genome resources generated during the past years...
April 14, 2018: Genomics
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