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Introduction The gilt-head sea bream, Sparus aurata ( Sparidae ), is one of the most popular food fishes from the Red Sea, which makes it attractive for aquaculture ( 21 ). For successful aquaculture, the effective control of parasitic diseases infecting fish should be carefully attended to, not least also because parasites can be spread from farmed fish to the wild population ( 23 ). Due to their direct life cycles, monogenean parasites constitute one of the most dangerous parasites infecting cultured fish ( 22 , 23 ). Microcotylidae ( 24 ) represent the
References A ntar , R., G argouri B en A bdallah , L. (2013): Trematodes in fishes of the genus Diplodus (Teleostei, Sparidae) from Bizerte Lagoon (Northern coast of Tunisia). Bull. Eur. Assoc. Fish Pathol. , 33: 44 – 52 A ntar , R., G argouri , L. (2015): Morphology and molecular analysis of life-cycle stages of Proctoeces maculatus (Looss, 1901) (Digenea: Fellodistomidae) in the Bizerte Lagoon, Tunisia. J. Helminthol. , 90: 726 – 736. DOI: 10.1017/S0022149X15001030 A ntar , R., G eorgieva , S., G argouri , L., K ostadinova , A. (2015): Molecular
New Information on the Hosts and Distribution of the Marine Fish Leeches Trachelobdella Lubrica and Pontobdella Muricata (Clitellata, Hirudinida)
Fish leeches collected in the Aegean Sea, the Sea of Marmara and the Black Sea were examined. Trachelobdella lubrica (Grube, 1840) was recorded for the first time from the ballan wrasse Labrus bergylta (Osteichthyes, Labridae), marine bream Diplodus vulgaris (Osteichthyes, Sparidae) and the grouper Epinephelus aeneus (Osteichthyes, Serranidae) from aquiculture. The leeches of this species were found in the Aegean Sea and the Sea of Marmara on the body surface, in the mouth and gill cavities of their hosts. Leeches identified as Pontobdella muricata (Linnaeus, 1758) were collected from the thornback ray Raja clavata (Chondrichthyes, Rajidae) in the Black Sea.
References BOYRA, A., SANCHEZ-JEREZ, P., TUYA, F., ESPINO, F., HAROUN, R. (2004): Attraction of wild coastal fishes to an Atlantic subtropical cage fish farm, Gran Canaria, Canary Islands. Env. Biol. Fish, 70:393 - 401. DOI: 10.1023/B:EBFI.0000035435.51530.c8 BUSH, A.O., LAFFERTY, K.D., LOTZ, J.M., SHOSTAK, A.W. (1997): Parasitology meets ecology in its own terms: Margolis et al. revisited. J. Parasitol., 83:575 - 583. DOI: 10.2307/3284227 CHIBA, S.N., IWATSUKI, Y., YOSHINO, T., HANZAWA, N. (2009): Comprehensive phylogeny of the family Sparidae (Perciformes
Sagittae otoliths of eight juvenile species: Boops boops, Diplodus vulgaris, Diplodus puntazzo, Sarpa salpa (family Sparidae), Liza ramada, Liza aurata (family Mugilidae), Atherina boyeri, Atherina hepsetus (family Atherinidae) were analysed and compared using descriptive morphological characters and morphometric indices. The noticeable differences among the otoliths of the investigated species are in their overall shape, margins (i.e. irregular, sinuate or crenate) and anterior region. Otolith shape varied from elliptic to pentagonal in sparids, elliptic to rectangular in mugilids and elliptic in two atherinids. Aspect ratio (OW/OL), ratio of the sulcus length occupied by the cauda length (CL/SL) and ratio of the sulcus length occupied by the ostium length (OSL/SL) were calculated for all species. The otolith contour was described using wavelets. The Canonical Analysis of Principal Coordinates (CAP) gave an overview of the otolith shape differentiation between eight juveniles. Using the Wavelet coefficients, the first principal component (CAP1) explained 58.1% of the variation among species and the second principal component (CAP2) 25.2%.
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