Rhizocephalans (Crustacea: Cirripedia) from Taiwan

Huang, Jung-Fu; Lützen, Jørgen

doi:10.1080/00222939800770661

Cited by 16 publications

(10 citation statements)

References 6 publications

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“…Eight species of rhizocephalans, belonging to 4 genera (Thylacoplethus, Diplothylacus, Sacculina, and Heterosaccus), have been described from Taiwanese waters (Huang & Lützen 1998). Among these, Polyascus plana (Glenner et al 2003) is an abundant species that infects several species of brachyurans with a wide geographical distribution (Huang & Lützen 1998, Liu & Lützen 2000.…”

Section: Introductionmentioning

confidence: 99%

“…Among these, Polyascus plana (Glenner et al 2003) is an abundant species that infects several species of brachyurans with a wide geographical distribution (Huang & Lützen 1998, Liu & Lützen 2000. Development and sex ratio of the larvae of P. plana, released from the externae on the parasitized Grapsus albolineatus, have been studied (Tu et al 2009).…”

Section: Introductionmentioning

confidence: 99%

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Metabolic effects of parasitization by the barnacle Polyascus plana (Cirripedia: Rhizocephala: Sacculinidae) on a grapsid host, Metopograpsus thukuhar

Hsiao¹,

Wu²,

Tung³

et al. 2016

Dis. Aquat. Org.

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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.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Metabolic effects of parasitization by the barnacle Polyascus plana (Cirripedia: Rhizocephala: Sacculinidae) on a grapsid host, Metopograpsus thukuhar

Hsiao¹,

Wu²,

Tung³

et al. 2016

Dis. Aquat. Org.

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“…The nature of the cuticles at each moult may differ radically from one another and, for instance, shift from a completely smooth one to one furnished with spines. One such case is illustrated in Huang & Lützen (1998, fig. 6A-C), which in Sacculina scutigera Huang & Lützen, 1998 shows a smooth-surfaced, thin, and transparent cuticle overlying the next cuticle provided with a multitude of spines.…”

Section: Moulting In Rhizocephalamentioning

confidence: 96%

“…One such case is illustrated in Huang & Lützen (1998, fig. 6A-C), which in Sacculina scutigera Huang & Lützen, 1998 shows a smooth-surfaced, thin, and transparent cuticle overlying the next cuticle provided with a multitude of spines. Many colonial rhizocephalans that are generally small and have short-lived generations only moult a few times, normally two (Høeg & Lützen, 1993).…”

Section: Moulting In Rhizocephalamentioning

confidence: 96%

Why Williamson’s (2014) theory of hybridogenesis fails to explain the evolution of the Rhizocephala

Glenner

Lützen

2015

Crustac

Self Cite

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All available biological, ultrastructural, and molecular data support the conclusion that the cirripedian suborders, Rhizocephala and Thoracica, are closely related. Williamson's speculations (Williamson, D. I., 2014. The origin of barnacles (Thecostraca, Cirripedia). Crustaceana, 87: 755-765) that the so-called hybridogenesis can explain how Rhizocephala evolved, rest on a selective choice of other authors' data and an ignorance of solid facts derived from decades of comparative anatomical and molecular studies. RÉSUMÉ Toutes les données biologiques, ultrastructurales et moléculaires disponibles appuient la conclusion que les sous-ordres de Cirripèdes, Rhizocephala et Thoracica, sont étroitement apparentés. Les spéculations de Williamson (Williamson, D. I., 2014. The origin of barnacles (Thecostraca, Cirripedia)) selon lesquelles la soit-disant hybridogenèse pourrait expliquer comment les Rhizocephala ont évolué, reposent sur un choix sélectif de données d'autres auteurs et sur une ignorance de faits solides tirés de décennies d'études moléculaires et d'anatomie comparative.

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“…The prevalence of parasitic barnacles is reported around the world, including European countries (Rees & Glenner, 2014), Japan (Lutzen & Takahashi, 1997), Taiwan (Huang & Lutzen, 1998), China (Yang et al, 2014), Malaysia (Boschma, 1949), Australia (Knuckey, Davie & Cannon, 1995), America (Tolley et al, 2006) and India (Raffi et al, 2012). As well as mud crabs, rhizocephalan parasites are known to invade a wide range of other marine and intertidal crab species such as the European green crab, Carcinus maenas (LINNAEUS 1758) (Thresher et al, 2000), intertidal crab, Hemigrapsus sanguineus (DE HAAN 1853) (Lutzen & Takahashi, 1997), sand crab, Portunus pelagicus (LINNAEUS 1758) (Bishop & Cannon, 1979; Weng, 1987) and three-spotted crab, Portunus sanguinolentus (HERBST 1783) (Raffi et al, 2012; Yang et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Infestation of parasitic rhizocephalan barnaclesSacculina beauforti(Cirripedia, Rhizocephala) in edible mud crab,Scylla olivacea

Waiho

Fazhan

Glenner

2017

PeerJ

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Screening of mud crab genus Scylla was conducted in four locations (Marudu Bay, Lundu, Taiping, Setiu) representing Malaysia. Scylla olivacea with abnormal primary and secondary sexual characters were prevalent (approximately 42.27% of the local screened S. olivacea population) in Marudu Bay, Sabah. A total of six different types of abnormalities were described. Crabs with type 1 and type 3 were immature males, type 2 and type 4 were mature males, type 5 were immature females and type 6 were mature females. The abdomen of all crabs with abnormalities were dented on both sides along the abdomen’s middle line. Abnormal crabs showed significant variation in their size, weight, abdomen width and/or gonopod or pleopod length compared to normal individuals. The mean body weight of abnormal crabs (type 1–5) were higher than normal crabs with smaller body size, while females with type 6 abnormality were always heavier than the normal counterparts at any given size. Sacculinid’s externa were observed in the abdomen of crabs with type 4 and type 6 abnormalities. The presence of embryos within the externa and subsequent molecular analysis of partial mitochondrial COI region confirmed the rhizocephalan parasite as Sacculina beauforti. Future in-depth descriptions of the life cycle and characteristics of S. beauforti are recommended as it involves a commercially important edible crab species and the effect on human health from the consumption of crabs is of crucial concern.

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Rhizocephalans (Crustacea: Cirripedia) from Taiwan

Cited by 16 publications

References 6 publications

Metabolic effects of parasitization by the barnacle Polyascus plana (Cirripedia: Rhizocephala: Sacculinidae) on a grapsid host, Metopograpsus thukuhar

Metabolic effects of parasitization by the barnacle Polyascus plana (Cirripedia: Rhizocephala: Sacculinidae) on a grapsid host, Metopograpsus thukuhar

Why Williamson’s (2014) theory of hybridogenesis fails to explain the evolution of the Rhizocephala

Infestation of parasitic rhizocephalan barnaclesSacculina beauforti(Cirripedia, Rhizocephala) in edible mud crab,Scylla olivacea

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