Dataset Information

New records of parasitic copepod (Crustacea, Siphonostomatoida, Pennellidae) found on the body surface of two cetacean species in China.

ABSTRACT:

Background

Pennellabalaenoptera Koren & Danielssen, 1877 (Crustacea, Siphonostomatoida, Pennellidae) is so far known as the largest copepod species and has only been found as a parasite on marine mammals. Previous studies on parasitic copepods in China only focused on those found on economic fishes, no records of P.balaenoptera having ever been reported before.

New information

A Bryde's whale (Balaenopteraedeni Anderson, 1879) and a pygmy sperm whale [Kogiabreviceps (Blainville, 1838)] were respectively stranded on the eastern and southern coast of China in 2021 and 2022. A total of eight parasitic copepods found on their body surface were sampled and examined. The parasites were identified as Pennellabalaenoptera, based on morphological characteristics and measurements. Descriptions and photomicrographs of this newly-recorded species from China are given in the present study.

SUBMITTER: Zeng Q

PROVIDER: S-EPMC10848844 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature

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Publications

New records of parasitic copepod (Crustacea, Siphonostomatoida, Pennellidae) found on the body surface of two cetacean species in China.

Zeng Qianhui Q Lin Yejie Y

Biodiversity data journal 20230220

<h4>Background</h4><i>Pennellabalaenoptera</i> Koren & Danielssen, 1877 (Crustacea, Siphonostomatoida, Pennellidae) is so far known as the largest copepod species and has only been found as a parasite on marine mammals. Previous studies on parasitic copepods in China only focused on those found on economic fishes, no records of <i>P.balaenoptera</i> having ever been reported before.<h4>New information</h4>A Bryde's whale (<i>Balaenopteraedeni</i> Anderson, 1879) and a pygmy sperm whale [<i>Kogia ...[more]

PMID: 38327287

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Project description:Yunnan Province, China is thought to be the original source of biovar Orientalis of Yersinia pestis, the causative agent of the third plague pandemic that has spread globally since the end of the 19th century. Although encompassing a large area of natural plague foci, Y. pestis strains have rarely been found in live rodents during surveillance in Yunnan, and most isolates are from rodent corpses and their fleas. In 2017, 10 Y. pestis strains were isolated from seven live rodents and three fleas in Heqing County (HQ) of Yunnan. These strains were supposed to have low virulence to local rodents Eothenomys miletus and Apodemus chevrieri because the rodents were healthy and no dead animals were found in surrounding areas, as had occurred in previous epizootic disease. We performed microscopic and biochemical examinations of the isolates,and compared their whole-genome sequences and transcriptome with those of 10 high virulence Y. pestis strains that were isolated from the adjacent city (Lijiang). We analyzed the phenotypic, genomic, and transcriptomic characteristics of live rodent isolates. The isolates formed a previously undefined monophyletic branch of Y. pestis that was named 1.IN5. Six SNPs, two indels, and one copy number variation were detected between live rodent isolates and the high virulence neighbors. No obvious functional consequence of these variations was found according to the known annotation information. Among the genes that were differentially expressed between the live rodent isolates and their high virulence neighbors, we detected five iron transfer-related genes that were significantly up-regulated in live rodent isolates compared with high virulence isolates (|log2 (FC) | >1, p.adjust <0.05), indicating these genes may be related to the low-virulence phenotype. The novel genotype of Y. pestis reported here provides further insights into the evolution and spread of plague as well as clues that may help to decipher the virulence mechanism of this notorious pathogen.

Dataset Information

New records of parasitic copepod (Crustacea, Siphonostomatoida, Pennellidae) found on the body surface of two cetacean species in China.

Background

New information

Publications

New records of parasitic copepod (Crustacea, Siphonostomatoida, Pennellidae) found on the body surface of two cetacean species in China.

Similar Datasets

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