Movement of sonically tagged bluespine unicornfish, <i>Naso unicornis</i>, in relation to marine reserve boundaries in Rodrigues, western Indian Ocean

Hardman, E.; Green, John M.; Desiré, M. S.; Perrine, S.

doi:10.1002/aqc.1102

Cited by 15 publications

(7 citation statements)

References 15 publications

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“…type B populations provide a record of movement of individual fish among groups of fish associated with the Great Barrier Reef. These suggested patterns of movement are consistent with the 'commuting' and 'foraying' patterns observed in Naso unicornis studies using radio telemetry-based tracking [75,76].…”

Section: Evolution Of Horizontally Acquired Symbionts Depends On Hostsupporting

confidence: 82%

Recombination contributes to population diversification in the polyploid intestinal symbiont Epulopiscium sp. type B

et al. 2019

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Epulopiscium sp. type B (Lachnospiraceae) is an exceptionally large, highly polyploid, intestinal symbiont of the coral reef dwelling surgeonfish Naso tonganus. These obligate anaerobes do not form mature endospores and reproduce solely through the production of multiple intracellular offspring. This likely makes them dependent on immediate transfer to a receptive host for dispersal. During reproduction, only a small proportion of Epulopiscium mother-cell DNA is inherited. To explore the impact of this unusual viviparous lifestyle on symbiont population dynamics, we investigated Epulopiscium sp. type B and their fish hosts collected over the course of two decades, at island and reef habitats near Lizard Island, Australia. Using multi-locus sequence analysis, we found that recombination plays an important role in maintaining diversity of these symbionts and yet populations exhibit linkage disequilibrium (LD). Symbiont populations showed spatial but not temporal partitioning. Surgeonfish are long-lived and capable of traveling long distances, yet the population structures of Epulopiscium suggest that adult fish tend to not roam beyond a limited locale. Codiversification analyses and traits of this partnership suggest that while symbionts are obligately dependent on their host, the host has a facultative association with Epulopiscium. We suggest that congression of unlinked markers contributes to LD estimates in this and other recombinant populations of bacteria. The findings here inform our understanding of evolutionary processes within intestinal Lachnospiraceae populations. Supplementary informationThe online version of this article (https://

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Section: Evolution Of Horizontally Acquired Symbionts Depends On Hostsupporting

confidence: 82%

Recombination contributes to population diversification in the polyploid intestinal symbiont Epulopiscium sp. type B

et al. 2019

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“…Human pressure is less documented for the Rodrigues reef. In response to overfishing 10 years ago, the local government of Rodrigues implemented four MPAs to the north of the island, but only partial management has been set up and fishing still occurs in these areas [ 62 , 63 ]. In addition, the South East Marine Protected Area (SEMPA) is an area in the south-eastern of Rodrigues designated as an MPA in 2009.…”

Section: Methodsmentioning

confidence: 99%

Multiscale variability in coral recruitment in the Mascarene Islands: From centimetric to geographical scale

et al. 2019

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Coral recruitment refers to the processes allowing maintenance and renewal of coral communities. Recruitment success is therefore indispensable for coral reef recovery after disturbances. Recruitment processes are governed by a variety of factors occurring at all spatial and temporal scales, from centimetres to hundreds of kilometres. In the present context of rising disturbances, it is thus of major importance to better understand the relative importance of different scales in this variation, and when possible, the factors associated with these scales. Multiscale spatio-temporal variability of scleractinian coral recruitment was investigated at two of the Mascarene Islands: Reunion and Rodrigues. Recruitment rates and taxonomic composition were examined during three consecutive six-month periods from regional to micro-local scales (i.e. from hundreds of kilometres to few centimetres) and between two protection levels (no-take zones and general protection zones). Very low recruitment rates were observed. Rodrigues displayed lower recruitment rates than Reunion. Recruit assemblage was dominated by Pocilloporidae (77.9%), followed by Acroporidae (9.9%) and Poritidae (5.2%). No protection effect was identified on coral recruitment, despite differences in recruitment rates among sites within islands. Recruits were patchily distributed within sites but no aggregative effect was detected, i.e. the preferentially colonised tiles were not spatially grouped. Recruits settled mainly on the sides of the tiles, especially at Rodrigues, which could be attributed to the high concentration of suspended matter. The variability of recruitment patterns at various spatial scales emphasises the importance of micro- to macro-local variations of the environment in the dynamics and maintenance of coral populations. High temporal variability was also detected, between seasons and years, which may be related to the early 2016 bleaching event at Rodrigues. The low recruitment rates and the absence of protection effect raise questions about the potential for recovery from disturbances of coral reefs in the Mascarene Islands.

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“…Naso unicornis are found in tropical regions throughout the Indo-Pacific and are a target group for artisanal fisheries (Randall 2001;Hardman et al, 2010;Marshell et al 2011;McIlwain et al 2012). N. unicornis is belonging to family Acanthuridae ans is classified as herbivorous grazer.…”

Section: Introductionmentioning

confidence: 99%

تأثير طريقة التمليح التقليدية والتجفيف الشمسى على الخصائص التغذوية والحسية للأسماک أبو قرن فى البحر الأحمر

اسماعيل¹,

العزيز²,

أحمد³

2018

المجلة العلمية لکلية التربية النوعية - جامعة المنوفية

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Fifteen fishes were used to study and to determine nutritional and sensorial properties of unicorn fish in the different seasons, as well as the effect of salting processes on their chemical contents (such as amino and fatty acids). The quality parameters are varied in the different seasons where, protein reached 73.87% and lipids was 8.38% in fresh fish. On the other hand, Histidine recorded 13.71%, Glutamic acid reached 17.03%, Aspartic acid was 12.35%, Alanine was 10.57%, Isoleucine was 1.07%, Methionine was 0.87% and Valine was 6.01%. During summer, within one month of salting and sun dryness, fish recorded 12 amino acids with high amounts of Histidine 22.78% and Glutamic acid 16. 82%. While after 90 days of storage, 14 amino acids were recorded with a high amount of Histidine which recorded 18.32% and Glutamic acid which reached 18.62%. Total protein of dry salting fish recorded 68.98% and total lipid recorded 7.18% after three months. Ten fatty acids were recorded and identified in fresh fish, the saturated fatty acids recorded higher values than the monounsaturated and polyunsaturated fatty acids. On the other hand, the salting process helps in preserving the ω-3 and ω-6 fatty acid which considered as an important factor in human nutrition. We concluded that, salted fish has outstanding sensory and help in preserving the nutritional characteristics due to high quality and wellbalanced essential amino and fatty acids during different storage periods dried. The high quality of dried fishes was mainly due to hygienic processing, adequate salting, hygienic drying, and use of fresh fish for processing of the dried fishes.

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Movement of sonically tagged bluespine unicornfish, Naso unicornis, in relation to marine reserve boundaries in Rodrigues, western Indian Ocean

Cited by 15 publications

References 15 publications

Recombination contributes to population diversification in the polyploid intestinal symbiont Epulopiscium sp. type B

Recombination contributes to population diversification in the polyploid intestinal symbiont Epulopiscium sp. type B

Multiscale variability in coral recruitment in the Mascarene Islands: From centimetric to geographical scale

تأثير طريقة التمليح التقليدية والتجفيف الشمسى على الخصائص التغذوية والحسية للأسماک أبو قرن فى البحر الأحمر

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