Comparative allometry growth of some marine fish digenetic trematodes

Abstract

Allometric growth variation was compared for Plagioporus idoneus, Lepocreadium pegorchis, Opecoeloides furcatus, Bacciger israelensis, Aphanurus stossichi and Parahurleytrema trachinoti collected from East Mediterranean fishes. The pharynx, the oral and the ventral sucker diameters always showed a negative allometry. The other parameters tested were variable with the species. We study the effects of some environmental factors: the influence of the host species is analysed in Plagioporus idoneous, wich parasitizes Oblada melanura, Diplodus sargus and D. vulgaris and in Lepocreadium pegorchis, wich parasitizes Pagellus erythrinus, Lithognathus mormyrus and Spicara smaris; the influence of the microhabitat and the intensity of infection is analysed in Bacciger israelensis and Aphanurus stossichi, both parasites of Boops boops. We report significant differences with the host species, for the allometric growth of the testes; the effect of the microhabitat was revealed by the hindbody allometric value; no significant difference was detected in relation with the intensity of infection

Descriptions of some unusual digeneans from Boops boops L. (Sparidae) and a complete checklist of its metazoan parasites

“…Stephanostomum imparispine (Linton, 1905) met SEA Parukhin (1966Parukhin ( , 1976 Stephanostomum Fischthal (1980Fischthal ( , 1982, Saad-Fares (1985), Saad-Fares & Combes (1992a, 1992b, Akmirza (1998) (1975,1994), (1985), Saad-Fares & Combes (1992a, 1992b, Sey (1970), Papoutsoglou (1976), Fischthal (1980Fischthal ( , 1982, Akmirza (1998) WM Nascetti, Paggi, Orecchia, Mattiuci & Bullini (1984), Nascetti et al (1986), Present study EM Rizk et al (1996) and Akmirza (2000) M Paggi, Orecchia, Nascetti, Mattiuci & Bullini (1983), Orecchia, Paggi, Mattiucci, Di Cave & Catalini (1989) Larval Anisakidae WM Renaud et al (1980), Cook et al (1981), …”

A new cryptic species of Aponurus Looss, 1907 (Digenea: Lecithasteridae) from Mediterranean goatfish (Teleostei: Mullidae)

“…Although the dependence of the shape of the organs on body size is recognised as a factor affecting the proportions among the various dimensions used in trematode taxonomy, only a few studies have addressed within-species allometry in this group (Thomas, 1967;Rohde, 1966;Fischthal, 1978aFischthal, ,b, 1979Fischthal, , 1980bFischthal et al, 1982;Saad-Fares & Combes, 1992;Swarnakumari & Madhavi, 1992;Kostadinova et al, 2000) and parasitic flatworms in general (Poulin, 2009). In addition to important information, e.g.…”