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Metabolic effects of parasitization by the barnacle Polyascus plana (Cirripedia: Rhizocephala: Sacculinidae) on a grapsid host, Metopograpsus thukuhar.
Hsiao, Chia-Jen; Wu, Yen-I; Tung, Tzu-An; Wang, Guan-Yi; Toullec, Jean-Yves; Liu, Shih-Ting; Huang, Wen-San; Lee, Chi-Ying.
Affiliation
  • Hsiao CJ; Division of Gastroenterology, Department of Internal Medicine, Taoyuan Armed Forces General Hospital, Taoyuan 32551, Taiwan.
Dis Aquat Organ ; 119(3): 199-206, 2016 May 26.
Article in En | MEDLINE | ID: mdl-27225203
Pathophysiological studies of rhizocephalan infections are rare. We describe differences in the levels of tissue and hemolymph metabolites between Polyascus plana-parasitized and unparasitized individuals of Metopograpsus thukuhar. Crabs were assigned to either a parasitized (carrying at least 1 externa, i.e. a protruding reproductive body) or an unparasitized (not carrying externae and determined to be rootlet-free by a barnacle 18S rRNA-based polymerase chain reaction) group. Quantification of metabolites showed that muscle glycogen levels were significantly lower and hepatopancreas levels were significantly higher in parasitized crabs compared to unparasitized crabs; hepatopancreas triacylglycerol levels were significantly higher and hemolymph levels significantly lower in parasitized hosts, and there was no significant difference in muscle triacylglycerol levels between unparasitized and parasitized animals. Glucose levels in the hepatopancreas, muscle, and hemolymph were all significantly higher in parasitized hosts. Significant levels of glucose, triacylglycerol, and glycogen were present in the barnacle externae. In addition, levels of crustacean hyperglycemic hormone in the sinus glands were not significantly different between unparasitized and parasitized animals. Glucose mobilized from the muscle is likely converted to glycogen and triacylglycerol in the rootlet-infiltrated hepatopancreas of parasitized hosts, and the eyestalk neuroendocrine system appears not to be significantly impaired, in terms of hormone production and storage, by parasitization.
Subject(s)

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Thoracica / Brachyura Limits: Animals Language: En Journal: Dis Aquat Organ Journal subject: BIOLOGIA / MEDICINA VETERINARIA / MICROBIOLOGIA Year: 2016 Document type: Article Affiliation country: Taiwan Country of publication: Germany

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Thoracica / Brachyura Limits: Animals Language: En Journal: Dis Aquat Organ Journal subject: BIOLOGIA / MEDICINA VETERINARIA / MICROBIOLOGIA Year: 2016 Document type: Article Affiliation country: Taiwan Country of publication: Germany