Redescription of Philometra margolisi Moravec, Vidal-Martinez et Aguirre-Macedo, 1995 (Nematoda: Philometridae), a gonad-infecting parasite of the red grouper Epinephelus morio (Serranidae) in the Gulf of Mexico

0479171 - BC 2018 RIV PL eng J - Článek v odborném periodiku
Moravec, František - Bakenhaster, M. - Leone, E. H.
Redescription of Philometra margolisi Moravec, Vidal-Martinez et Aguirre-Macedo, 1995 (Nematoda: Philometridae), a gonad-infecting parasite of the red grouper Epinephelus morio (Serranidae) in the Gulf of Mexico.
Acta Parasitologica. Roč. 62, č. 2 (2017), s. 412-421. ISSN 1230-2821. E-ISSN 1896-1851
Grant CEP: GA ČR(CZ) GBP505/12/G112
Institucionální podpora: RVO:60077344
Klíčová slova: Nematode parasite * Dracunculoidea * marine fish * USA * seasonal occurrence
Obor OECD: Zoology
Impakt faktor: 1.039, rok: 2017

The insufficiently known nematode species Philometra margolisi Moravec, Vidal-Martinez et Aguirre-Macedo, 1995 (Philometridae) is redescribed based on light and scanning electron microscopical (SEM) examinations of specimens collected from the gonad of the type host, the red grouper Epinephelus morio (Valenciennes) (Serranidae, Perciformes), in the northern Gulf of Mexico off Florida, USA. Also, new prevalence data for females of P. margolisi were derived from 188 fish, and a subset of these (n = 38) were used to determine prevalence and intensity of male nematodes. The male of this species was studied with SEM for the first time, which revealed some new, taxonomically important morphological features. The male posterior end had a V-shaped caudal mound, four pairs of minute adanal papillae, a pair of large papillae located posterior to the cloacal aperture and a pair of very small phasmids. The distal end of the gubernaculum is unique among all gonad-infecting species of Philometra parasitizing serranids in that its ventral surface is flat, smooth, without the usual two longitudinal grooves, the dorsal lamellate structures on the gubernaculum are also different in this species. In contrast to data in the original species description, the body length of gravid females of P. margolisi was 132-280 mm. Overall prevalence for male nematodes (76.3%) was much higher than for females (15.4%), and female nematode prevalence was higher in samples collected during host spawing season than out of season (27.1% and 3.3%, respectively).
Trvalý link: http://hdl.handle.net/11104/0275167