Topic
Scarus ovifrons
About: Scarus ovifrons is a research topic. Over the lifetime, 4 publications have been published within this topic receiving 15 citations.
Papers
TL;DR: In this article, the authors used acoustic telemetry to detect the diel vertical movement patterns of S. ovifrons, video survey to detect its feeding depths and substrata and focal follow survey and genetic analysis to identify algae composition on the feeding scars at Kashiwajima Island, southwestern Japan (32° 46' N, 132° 38' E).
Abstract: The feeding ecology of scarinine parrotfishes on tropical coral reefs has received considerable attention in the past few decades; nonetheless, relatively few studies have been conducted in high-latitude reefs. Among the Indo-Pacific Scarus species, Scarus ovifrons is unique, being largely restricted to the warm temperate waters of Japan. Nonetheless, there is very little information available on the feeding ecology of this species. In this study, the authors used acoustic telemetry to detect the diel vertical movement patterns of S. ovifrons, video survey to detect its feeding depths and substrata and focal follow survey and genetic analysis to identify algae composition on the feeding scars at Kashiwajima Island, southwestern Japan (32° 46' N, 132° 38' E). Acoustic telemetry revealed that S. ovifrons spent most of its time in shallow water ( 40 cm total length) sometimes took bites directly on live corals (Acropora solitaryensis) at the 5 m depth zone where live tabular corals dominated the benthos. Molecular phylogenetic analyses revealed that epilithic algae collected from feeding scars were mainly composed of Rhodophyta, and coralline algae were less often targeted. Overall, this study revealed that S. ovifrons feeds mostly at depths <10 m, and the feeding algae substrata of the species are similar to those of tropical coral reef parrotfishes.
9 citations
1 citations
TL;DR: Phylogenies resulting from two single-region analyses and the concatenation of the two mitochondrial regions supported a close phylogenetic affinity between S. obishime and S. ovifrons, which seems to indicate a partially shared evolutionary history between the “East Asian” and Arabian lineages.
Abstract: Scarus obishime is a rare parrotfish endemic to the Ogasawara Islands, located in the northwestern Pacific Ocean roughly 1,000 km south of the main Japanese archipelago. It was described as a new species in 1993. Since then it has been speculated to be closely related to Scarus ovifrons occurring on southern coasts of the main Japanese archipelago, but this has never been formally tested. To identify the closest relative of this rare parrotfish, we determined one nuclear (S7 ribosomal protein gene intron 1 [S7I1], ca. 600 bp) and two mitochondrial (control region [CR], ca. 400 bp and 16S rRNA, ca. 600 bp) partial DNA sequences for two specimens of the species and conducted molecular phylogenetic analyses using recently published sequences from 45 of the 52 described species of the genus and 16 of the 18 described species of Chlorurus. Nuclear and mitochondrial sequences were analyzed separately based on results of Basic Local Alignment Search Tool (BLAST) searches using the newly obtained sequences of S. obishime as queries. Phylogenies resulting from two single-region analyses (S7I1 and 16S rRNA) and the concatenation of the two mitochondrial regions (CR + 16S rRNA) supported a close phylogenetic affinity between S. obishime and S. ovifrons. In addition, nuclear (S7I1) analyses demonstrated that the two “East Asian” species formed a robust monophyletic group with the Arabian species Scarus arabicus, whereas mitochondrial data sets significantly rejected monophyly of the three species. This result seems to indicate a partially shared evolutionary history between the “East Asian” and Arabian lineages.
1 citations
08 Apr 2013-Food Additives and Contaminants Part A-chemistry Analysis Control Exposure & Risk Assessment
TL;DR: The LC-MS/MS findings therefore do not support the recently accepted hypothesis that palytoxin is the causative agent in blue humphead parrotfish poisoning in Japan.
Abstract: Since 1953, a total of 27 human poisoning cases caused by the consumption of blue humphead parrotfish, Scarus ovifrons, have been reported in Japan. Characteristic symptoms are severe muscle pain associated with rhabdomyolysis. Although it is believed that palytoxin, which is one of the most potent non-protein marine biotoxins, is the most likely causative toxin in blue humphead parrotfish poisoning, palytoxin has not been proven conclusively as the causative toxin because of lack of a reliable and sensitive analytical method for palytoxin. In 2011, human poisoning cases caused by the consumption of blue humphead parrotfish occurred in Miyazaki and Tokyo. In our present study, an LC-MS/MS method for palytoxin and its analogues in the blue humphead parrotfish samples causing the human poisoning cases in 2011 was developed and the samples were analysed by using the newly developed LC-MS/MS method. Palytoxin and its analogues were not detected in the samples from the food poisoning cases. The LC-MS/MS findings therefore do not support the recently accepted hypothesis that palytoxin is the causative agent in blue humphead parrotfish poisoning in Japan.
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Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 1 |
| 2014 | 1 |
| 2013 | 1 |
| 1984 | 1 |