<i>Philichthys xiphiae</i> (Copepoda; Philichthyidae) – an interesting cranium parasite of the swordfish <i>Xiphias gladius</i> collected from the Baltic Sea

Rolbiecki, Leszek; Arciszewski, Bartłomiej; Izdebska, Joanna N.

doi:10.2478/oandhs-2021-0028

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…Several species of large nematodes have been found in the buccal and alimentary cavities of paddlefish [ 52 , 53 ]. In other fish, small copepod parasites may invade lateral line canals [ 54 – 56 ]. In general, ducted cutaneous organs are at risk of microbe / parasite invasion.…”

Section: Discussionmentioning

confidence: 99%

Lectin binding and gel secretion within Lorenzinian electroreceptors of Polyodon

et al. 2022

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We imaged the carbohydrate-selective spatial binding of 8 lectins in the ampullary organs (AOs) of electroreceptors on the rostrum of freshwater paddlefish (Polyodon spathula), by fluorescence imaging and morphometry of frozen sections. A focus was candidate sites of secretion of the glycoprotein gel filling the lumen of AOs. The rostrum of Polyodon is an electrosensory appendage anterior of the head, covered with >50,000 AOs, each homologous with the ampulla of Lorenzini electroreceptors of marine rays and sharks. A large electrosensory neuroepithelium (EN) lines the basal pole of each AO’s lumen in Polyodon; support cells occupy most (97%) of an EN’s apical area, along with electrosensitive receptor cells. (1) Lectins WGA or SBA labeled the AO gel. High concentrations of the N-acetyl-aminocarbohydrate ligands of these lectins were reported in canal gel of ampullae of Lorenzini, supporting homology of Polyodon AOs. In cross sections of EN, WGA or SBA labeled cytoplasmic vesicles and organelles in support cells, especially apically, apparently secretory. Abundant phalloidin+ microvilli on the apical faces of support cells yielded the brightest label by lectins WGA or SBA. In parallel views of the apical EN surface, WGA labeled only support cells. We concluded that EN support cells massively secrete gel from their apical microvilli (and surface?), containing amino carbohydrate ligands of WGA or SBA, into the AO lumen. (2) Lectins RCA120 or ConA also labeled EN support cells, each differently. RCA120-fluorescein brightly labeled extensive Golgi tubules in the apical halves of EN cells. ConA did not label microvilli, but brightly labeled small vesicles throughout support cells, apparently non-secretory. (3) We demonstrated “sockets” surrounding the basolateral exteriors of EN receptor cells, as candidate glycocalyces. (4) We explored whether additional secretions may arise from non-EN epithelial cells of the interior ampulla wall. (5) Model: Gel is secreted mainly by support cells in the large EN covering each AO’s basal pole. Secreted gel is pushed toward the pore, and out. We modeled gel velocity as increasing ~11x, going distally in AOs (toward the narrowed neck and pore), due to geometrical taper of the ampulla wall. Gel renewal and accelerated expulsion may defend against invasion of the AO lumen by microbes or small parasites. (6) We surveyed lectin labeling of accessory structures, including papilla cells in AO necks, striated ectoderm epidermis, and sheaths on afferent axons or on terminal glia.

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Section: Discussionmentioning

confidence: 99%

Lectin binding and gel secretion within Lorenzinian electroreceptors of Polyodon

et al. 2022

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“…Parasites play a role of stabilizers/destabilizers depending on susceptibility of hosts and size of the ecosystem (Combes, 1996). The study of the parasite community of rare or poorly studied fish species is very important for general knowledge of the marine biodiversity (Rolbiecki et al, 2021;Rolbiecki & Rokicki, 2008).…”

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The first data on parasite community of the black scorpionfish, Scorpaena porcus (Actinopterygii: Scorpaenidae), from the North‐Western Black Sea

et al. 2022

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One of the most important aspects of the marine environment study is the investigation of the diversity of parasites, especially in marine fishes (Sasal et al., 1997). Parasites are commonly used as biological tags in fish population studies, and especially for discriminating between fish stocks in fisheries studies (Catalano et al., 2014;Mackenzie, 1983;Poulin & Kamiya, 2015). The important factors that affect the viability of natural populations and communities are infestation with parasites and parasitic diseases (Combes, 1995;Morand & Arias Gonzalez, 1997), given that marine fish individuals may suffer from parasitic attacks (Faliex & Morand, 1994).The black scorpionfish (Scorpaena porcus L., 1758) is a marine demersal non-migratory fish species inhabiting the waters of the Eastern Atlantic from the British Isles in the north to the Canary Islands in the south including the Mediterranean and Black Seas (Hureau & Litvinenko, 1986). The fish is known as a commercial fisheries species in the Mediterranean basin, also a prospective aquaculture species (Németh et al., 2010). Instead of this, the black scorpionfish is known as a traumatogenic fish species, which is dangerous for human health (Halstead et al., 1990).According to the published data, in the past, the black scorpionfish was sporadic in the whole North-Western Black Sea (NWBS) including the Odessa region (Movchan, 2011;Zambriborshch et al., 1995). This Atlanto-Mediterranean fish species avoid the desalinated and cold parts of the sea. In the Gulf of Odessa, this fish was a common component in the historical period (Vinogradov, 1960) but almost disappeared in the 1980 -1990s (Zambriborshch et al., 1995. In recent several decades, the black scorpionfish increased in number in the Gulf of Odessa (Khutornoy, 2000;Zamorov et al., 2019). In 2005-2010, the density of this fish in the Gulf of Odessa, by the data of net catches, was recorded as sporadic (Chernykova & Zamorov, 2011). But it started to be a common species in the

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First step towards understanding the specific identity of fish muscle parasites of the genus Sarcotaces (Copepoda: Philichthyidae)—New species and first molecular ID in the genus

Piasecki

Barcikowska²,

Panicz

et al. 2022

International Journal for Parasitology: Parasites and Wildlife

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Philichthys xiphiae (Copepoda; Philichthyidae) – an interesting cranium parasite of the swordfish Xiphias gladius collected from the Baltic Sea

Cited by 3 publications

References 18 publications

Lectin binding and gel secretion within Lorenzinian electroreceptors of Polyodon

Lectin binding and gel secretion within Lorenzinian electroreceptors of Polyodon

The first data on parasite community of the black scorpionfish, Scorpaena porcus (Actinopterygii: Scorpaenidae), from the North‐Western Black Sea

First step towards understanding the specific identity of fish muscle parasites of the genus Sarcotaces (Copepoda: Philichthyidae)—New species and first molecular ID in the genus

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