Spermatozoïdes biflagellés chez un poisson téléostéen de la famille des apogonidae

Mattei, Claudine; Mattei, Xavier

doi:10.1016/s0022-5320(84)90120-5

Cited by 17 publications

(17 citation statements)

References 4 publications

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“…Most of the teleost groups possess uniflagellate tails that contain the 9 + 2 microtubular patterns. However, a few teleost species have a biflagellate spermatozoon species (Mattei & Mattei, 1984) similar to those described in this work. On the other hand, in most of the different teleost species, the tail does not exibiht any plasmatic ornamentation, characterized by lateral ribbons on cytoplasmic extension along the axoneme.…”

Section: Discussionsupporting

confidence: 82%

“…Although they belong to the primitive type they show some unusual features. To date all the fish spermatozoa examined show some structural homogeneity which supports the idea that the ultrastructural features of spermatozoon can be useful for taxonomic and phylogenetic studies (Baccetti et al, 1984;Mattei, 1991;Mattei & Mattei, 1984;Gwo et al, 1993Gwo et al, , 1996.…”

Section: Discussionsupporting

confidence: 53%

“…However, the existing literature on spermiogenesis producing sperm with two flagella were only described in few teleost families as Bagridae (Yasuzumy, 1971), Batrachoididae (Hoffman, 1963), Myctophidae (Mattei & Mattei, 1976), Apogonidae (Mattei & Mattei, 1984) and Zoarcidae (Yao et al, 1995). On the other hand, the presence of the two lateral cytoplasmic extensions (or ribbons) in opposite insertion on each flagellum has been described in few teleost species (Billard, 1970) as well as in other fish groups (Mattei, 1970;Matos & Azevedo, 1989).…”

Section: Introductionmentioning

confidence: 99%

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Biflagellate spermatozoon structure of the hermaphrodite fish Satanoperca jurupari (Heckel, 1840) (Teleostei, Cichlidae) from the Amazon River

Matos¹,

Santos

Azevedo³

2002

Braz. J. Biol.

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The ultrastructural features of the sperm were studied in the hermaphroditic teleost Satanoperca jurupari HECKEL, 1840 from Amazon River. Spermatocytes, spermatids and sperm develop in the testicular cysts among the different oocyte stages. Different stages of early spermatocyte development, mainly the ones with synaptonemal complexes were often observed. The mature spermatozoa belong to the introsperm type, with a short head (~ 3 µm long and 1.3 µm wide) without acrosome, short midpiece (~ 1.2 µm long and 1.8 µm wide) containing several mitochondria surrounding two centrioles and forming a mitochondrial collar. They have two flagella (each ~15 µm long) each of which has a common 9 + 2 microtubular pattern. Each flagellum has two opposite lateral cytoplasmic extensions that begin about 3 µm the midpiece still close to the end piece of flagellum.

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Section: Discussionsupporting

confidence: 82%

Section: Discussionsupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

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Biflagellate spermatozoon structure of the hermaphrodite fish Satanoperca jurupari (Heckel, 1840) (Teleostei, Cichlidae) from the Amazon River

Matos¹,

Santos

Azevedo³

2002

Braz. J. Biol.

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“…Although a large number of teleosts, representing different families, produce biflagellated spermatozoa, the evolutionary significance (if any) of this feature is unknown. A more bizarre condition exists in Gymnarchus niloticus (Mattei et al, 1967b) and a number of species of mormyres (Mattei et al, 1972b) which produce aflagellated spermatozoa. Spermiogenesis appears normal but neither of the two centrioles, which lie between the nucleus and mitochondria, develops a flagellum.…”

Section: Osteichthyesmentioning

confidence: 99%

Spermatogenesis in nonmammalian vertebrates

Pudney

1995

Microscopy Res & Technique

178

120

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Spermatogenesis appears to be a fairly conserved process throughout the vertebrate series. Thus, spermatogonia develop into spermatocytes that undergo meiosis to produce spermatids which enter spermiogenesis where they undergo a morphological transformation into spermatozoa. There is, however, variation amongst the vertebrates in how germ cell development and maturation is accomplished. This difference can be broadly divided into two distinct patterns, one present in anamniotes (fish, amphibia) and the other in amniotes (reptiles, birds, mammals). For anamniotes, spermatogenesis occurs in spermatocysts (cysts) which for most species develop within seminiferous lobules. Cysts are produced when a Sertoli cell becomes associated with a primary spermatogonium. Mitotic divisions of the primary spermatogonium produce a cohort of secondary spermatogonia that are enclosed by the Sertoli cell which forms the wall of the cyst. With spermatogenic progression a clone of isogeneic spermatozoa is produced which are released, by rupture of the cyst, into the lumen of the seminiferous lobule. Following spermiation, the Sertoli cell degenerates. For anamniotes, therefore, there is no permanent germinal epithelium since spermatocysts have to be replaced during successive breeding seasons. By contrast, spermatogenesis in amniotes does not occur in cysts but in seminiferous tubules that possess a permanent population of Sertoli cells and spermatogonia which act as a germ cell reservoir for succeeding bouts of spermatogenic activity. There is, in general, a greater variation in the organization of the testis and pattern of spermatogenesis in the anamniotes compared to amniotes. This is primarily due to the fact there is more reproductive diversity in anamniotes ranging from a relatively unspecialized condition where gametes are simply released into the aqueous environment to highly specialized strategies involving internal fertilization. These differences are obviously reflected in the mode of spermatogenesis and this is particularly true of the stage of spermiogenesis where the morphology of the species-specific spermatozoon is determined. Moreover, unlike amniotes, many anamniotes display a spermatogenic wave manifest, depending upon the species, either at the level of the cyst or seminiferous lobule. This variation in the organization of the testis makes certain anamniotes perfect models for investigating germ cell development and maturation. For instance, the presence of a spermatogenic wave provides an opportunity to manually isolate discrete germ cell stages for analysis of specific Sertoli/germ cell interactions. Furthermore, for many anamniotes, germ cells mature in association with a morphologically poorly developed Sertoli cell. This seeming independence of Sertoli cell regulation allows the in vitro culture of isolated germ cells of some species of anamniotes through several developmental stages. Thus, due either to the anatomical organization of the testis, or structural simplicity of the germinal units, nonmammalian vert...

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“…from off Dakar, Senegal, were described by Mattei and Mattei (1984), and recently also for Apogon imberbis from the Mediterranean by Lahnsteiner (2003). According to these authors, the semen of these fish contained both biflagellar and monoflagellar sperm.…”

Section: Introductionmentioning

confidence: 99%

Testis structure, spermatogenesis, spermatocytogenesis, and sperm structure in cardinal fish (Apogonidae, Perciformes)

2005

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The testes in all 16 of the studied cardinal fish species are shown to be bilobed, with spermatogonia dispersed throughout the gametogenic epithelium of the seminiferous tubules. Each testicular lobe is covered luminally by an epithelium consisting of primary germ cells and Sertoli cells. At maturation the seminiferous tubules reach around 0.6-2.3 mm in length. They number from 60 in the smallest species to over 300 in the largest one, increasing both in dimension and number with increase in length of the male, and are species-specific. The highest number of spermatogonia is found at the apical ends of the tubules. During maturation extensions of Sertoli cells surround single or small groups of B-spermatogonia, forming the spermatocysts, the final dimensions of which reflect the final number of contained spermatozoids. Back-calculations of serial sections reveal that within the spermatocysts the spermatogonia undergo eight generations of mitotic divisions before the first and second meiotic divisions and formation of spermatids. The largest mature spermatocysts in large species attain around 180 microm in diameter, a volume of 25 mm(3), and contain around 8,200 spermatids. The total volume of sperm in the mature spermatocysts leaves enough space for the discarded cytoplasm and developing flagella. The bursting cysts liberate the ripe sperm and maturing spermatids, into the tubule lumen and spermduct, with the spermatids often still connected by cytoplasm bridges. The sperm, with one or two flagella, features round or oval heads and a cytoplasmic collar bearing a few mitochondria. The percentage of biflagellate or monoflagellate sperm differs in proportion in males of different lengths and in different species. Differences in spermatogenesis of small and larger species of cardinal fish are discussed.

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Spermatozoïdes biflagellés chez un poisson téléostéen de la famille des apogonidae

Cited by 17 publications

References 4 publications

Biflagellate spermatozoon structure of the hermaphrodite fish Satanoperca jurupari (Heckel, 1840) (Teleostei, Cichlidae) from the Amazon River

Biflagellate spermatozoon structure of the hermaphrodite fish Satanoperca jurupari (Heckel, 1840) (Teleostei, Cichlidae) from the Amazon River

Spermatogenesis in nonmammalian vertebrates

Testis structure, spermatogenesis, spermatocytogenesis, and sperm structure in cardinal fish (Apogonidae, Perciformes)

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