An ultrastructural study of early germ cells in Mugil (Liza) auratus Risso, 1810 (Teleostei : Mugilidae)
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منابع مشابه
Early sex differentiation in Mugil ( Liza ) auratus Risso , 1810 ( Teleost Mugilidae ) . An ultrastructural study
Grey-mullet are heterosexual fish and gonochorism is the general rule. Cytological cnalysis of sex-differentiation was studied by light microscopy (Stenger, 1959 ; Leray, 1968 ; Thong, 1969 ; Cassifour, 1975), but germ-cell characteristics were not sufficiently defined at this level and no distinction could be made between primordial germ-cells, oogonia and spermatogonia. Electron microscopy ha...
متن کاملReproductive biology of the mullet Mugil liza (Teleostei: Mugilidae) in a tropical Brazilian bay
The reproductive biology of Mugil liza Valenciennes, 1836 is described as a contribution to an elaborate management programm. A total of 243 specimens (89 males and 154 females) were collected in the Sepetiba Bay in south-eastern Brazil from July/2006 to June/2007. The gonadosomatic index (IG) and the sequential development of the ovaries observed through histological studies suggested that the...
متن کاملA comparative study of Ligophorus uruguayense and L. saladensis (Monogenea: Ancyrocephalidae) from Mugil liza (Teleostei: Mugilidae) in southern Brazil.
Representatives of Ligophorus Euzet et Suriano, 1977 were found on the gills of Mugil liza Valenciennes caught in southern Brazil. They were identified as Ligophorus uruguayense Failla Siquier et Ostrowski de Núñez, 2009 and Ligophorus saladensis Marcotegui et Martorelli, 2009, even though specific identification proved to be difficult due to inconsistencies in some diagnostic features reported...
متن کاملAnatomy and Histology of the Stomach and Pyloric Caeca in Mugilidae, Liza aurata (Risso, 1810), L. abu (Heckel, 1843) and Mugil cephalus (Linnaeus, 1758)
Alimentary canal of fishes has a great variety of structural Peculiarities which are important in fisheries and biology. The aim of this study was to explain the anatomical and histological aspects of stomach and pyloric caeca in L. aurata, L. abu and M. cephalus (Mugilidae) from the Caspian Sea. Fifteen adult individuals of mugilidae; Liza aurata, L. abu and Mugil cephalus were collected f...
متن کاملHistomorphological investigation of Liza aurata (Risso, 1810) (Mugilidae) ovary in the late oogenesis in the Caspian Sea
In the present study, various developmental stages of Liza aurata oocyte, especially IV and V stages have been described. On the basis of histological investigations, oocyte development in L. aurata comprises immature (I), the early maturing (II), the late maturing (III), mature (IV), ripe (V), and spent (VI) stages. In the stages I and II, nucleus occupied large volume of oocyte. Vacuolization...
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ژورنال
عنوان ژورنال: Annales de Biologie Animale Biochimie Biophysique
سال: 1978
ISSN: 0003-388X
DOI: 10.1051/rnd:19780604