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2. On the morphological variability of the attachment organ of Lernaeopodidae (Copepoda: Siphonostomatoida)
- Creator:
- Benkirane, Ouafae, Coste, Fancoise, and Raibaut, André
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- morphology, bulla, parasitic copepods, and Lernaeopodidae
- Language:
- English
- Description:
- The study of the bulla from 18 lemaeopodid copepod species collected on 15 marine fish species and one freshwater fish species taken mainly from the Gulf of Lions in the Mediterranean Sea reveals a great morphological and structural variability. It is however possible to bring forth three general remarks: - the bulla of Lernaeopodidae parasites of Selachii have a remarkably constant structure probably due to the tegument nature of the attachment substratum; - the bulla of Lernaeopodidae parasites of Teleostei has a morphology influenced by the nature of the attachment tissue; - when species of a same genus (i.e. Clavellotis) are attached on a same organ, the shape of the bulla can constitute a taxonomic characteristic.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3. Parasitic copepods of the narrownose smooth-hound shark Mustelus schmitti (Chondrichthyes: Triakidae) from Argentina
- Creator:
- Etchegoin, Jorge A. and Ivanov, Veronica A.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- parasitic copepods, Mustelus schmitti, Nessipus orientalis, Perissopus oblongus, Lernaeopoda galei, and Argentina
- Language:
- English
- Description:
- The parasitic copepod fauna of 182 specimens of Mustelus schmitti Springer from the coast of Mar del Plata, Argentina was investigated. Three species of parasitic copepods were identified: Nessipus orientalis Heller, 1865 from the buccal cavity, Perissopus oblongus (Wilson, 1908) from the edge of pectoral, pelvic, dorsal, anal and caudal fins and in claspers, and Lernaeopoda galei К rayer, 1837 from the base of the pectoral fins. N. orientalis was most common being present the entire year, while P. oblongus and L. galei occurred seasonally with low prevalence and mean intensity. There were differences in the site of infection by these copepods and variations in the relationship between prevalence and mean intensity and host size and seasonality. These parameters were unrelated to host sex. Our data suggest that the structure of this parasite community is a result of a complex of biotic and abiotic factors, such as temperature, spawning and breeding preferences of the host, and overlapping in the distribution of different shark species. This is the first report of N. orientalis in Argentinean waters.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
4. The genus Hatschekia (Copepoda: Hatschekiidae) from pufferfishes (Tetraodontiformes: Tetraodontidae) off the Ryukyu Islands, Japan, with descriptions of four new species and a redescription of H. pholas
- Creator:
- Uyeno, Daisuke and Nagasawa, Kazuya
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- parasitic copepods, gill parasites, Arothron spp., taxonomy, and identification key
- Language:
- English
- Description:
- Four new species of the genus Hatschekia Poche, 1902 (Copepoda: Siphonostomatoida: Hatschekiidae) are described based on female specimens collected from pufferfishes (Tetraodontiformes: Tetraodontidae) caught in coastal waters off the Ryukyu Islands, Japan: H. longiabdominalis sp. n. on Arothron hispidus (Linnaeus), H. geniculata sp. n. on A. hispidus (type host) and A. stellatus (Bloch et Schneider), H. ellipsocorpa sp. n. on A. mappa (Lesson), and H. boonah sp. n. on A. nigropunctatus (Bloch et Schneider) (type host) and A. meleagris (Schneider). Hatschekia longiabdominalis sp. n. and H. boonah sp. n. differ from all other congeners by sharing an unusual, projected abdomen and a fusiform trunk with posterior lobes; these two species are differentiated from each other by the shape of the dorsal chitinous frame on the cephalothorax. Hatschekia geniculata sp. n. can be distinguished by the combination of the following morphological characters: a rhomboidal cephalothorax with a pair of lateral conical protrusions, a cylindrical trunk with posterior lobes and a bent abdomen with a dorsal protrusion. Hatschekia ellipsocorpa sp. n. resembles H. pholas (Wilson, 1906) but can be distinguished from the latter by the possession of one distal and one inner setae on the terminal endopodal segment of legs 1 and 2. Hatschekia pholas is also redescribed based on female specimens from the tetraodontid A. stellatus. At present, 44 nominal species of the genus have been reported from Japan, including four new species described in this paper; 38 of them have been described originally from Japan.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public