Spermatogenesis and spermatology of some teleost fish species

Billard, Roland

doi:10.1051/rnd:19860601

Cited by 392 publications

(276 citation statements)

References 82 publications

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“…The cystic arrangement of the trahira testis was similar to that found in most teleosts (BILLARD 1986, MIURA 1999, GRIER & NEIDIG 2000 and its histology corresponded to the description given by MARQUES et al (2000). The seminiferous tubule arrangement is of the anastomosing lobular type (PARENTI & GRIER 2004) in which the germinal compartment does not end in the testis periphery but forms highly branched loops or tubules.…”

Section: Discussionsupporting

confidence: 77%

“…Studies of teleosts with external fertilization indicate that the process takes five to ten generations of spermatogonia to produce primary spermatocytes (MIURA 1999, MIURA et al 1991, ANDO et al 2000, MATTA et al 2002. In the guppy, Poecilia reticulata, a species of internal fertilization, 14 spermatogonial divisions are necessary to produce primary spermatocytes (BILLARD 1986). Concerning primary spermatocytes, approximately 50% of the trahira cysts contained a number of cells derived from, at least, eight mitotic divisions; in the remaining cysts such numbers were either nine or ten.…”

Section: Discussionmentioning

confidence: 99%

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Morphometric evaluation of the spermatogenesis in trahira Hoplias malabaricus (Bloch) (Characiformes, Erythrinidae)

Bizzott

Godinho²

2007

Rev. Bras. Zool.

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The Erythrinidae trahira, Hoplias malabaricus (Bloch, 1794), is widespread throughout South America river basins. We determined Sertoli cell supporting capacity (ratio of primary spermatocytes: Sertoli cells and spermatids: Sertoli cells), meiotic index (ratio of spermatids: primary spermatocytes) and the number of spermatogonial mitotic generations of this fish. The fish were captured in the Igarapava reservoir, Grande River, Alto Paraná River basin, Brazil. Testis fragments of three sexually mature trahiras were fixed in 5% buffered glutaraldehyde solution and embedded in glycol methacrylate. Serial sections of 2 and 3 µm in thickness were stained with 0.5% toluidine blue. Histological counts from cysts of primary spermatocytes and spermatids revealed, respectively, 326 ± 99 and 468 ± 73 nuclei of these cells. Sertoli cell supporting capacity was considerably higher for spermatids (113.3 ± 16:1) when compared to primary spermatocytes (71 ± 5:1). Between eight and ten spermatogonial generations were formed to give rise to primary spermatocytes. These values were within the generation range of those already found in freshwater teleosts of external fertilization. Correlation between the number of Sertoli cells and primary spermatocytes per cyst, and Sertoli cells and spermatids per cyst were statistically significant (p < 0.05).

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Section: Discussionsupporting

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Morphometric evaluation of the spermatogenesis in trahira Hoplias malabaricus (Bloch) (Characiformes, Erythrinidae)

Bizzott

Godinho²

2007

Rev. Bras. Zool.

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“…The testes of fresh water Neotropical siluriforms that have external fertilization present variable anatomical characteristics; they are elongated and fringed in the species Pimelodus maculatus La Cepède, 1803 (BAZZOLI et al 1997) In terms of histological appearance, the cranial portion of the testis of L. lentiginosa corresponds to the lobular type described by BILLARD (1986) with anastomoses between seminiferous tubules, a characteristic also founded in the testes of R. aspera (AGOSTINHO et al 1987). The presence of spermatogonia along the whole extension of the seminiferous tubules characterizes the testis of L. lentiginosa as unrestricted spermatogonial, under the terminology proposed by GRIER (1981).…”

Section: Discussionmentioning

confidence: 99%

Gonadal structure and gametogenesis of Loricaria lentiginosa Isbrücker (Pisces, Teleostei, Siluriformes)

Guimarães-Cruz

Santos

2005

Rev. Bras. Zool.

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ABSTRACT. The gonadal structure and gametogenesis of Loricaria lentiginosa Isbrücker, 1979 were studied through anatomical and histological techniques. Forty two males and ten females in maturation/mature stage were captured in the reservoir of Porto Colombia, Paraná river basin, Minas Gerais, using gill nets, from November 2001 to October 2002 (tri-monthly captures). Examination of the testes revealed that they were paired, elongated and not fringed organs. Histologically, the testes presented three distinct regions: cranial espermatogenic; transistion espermatogenic and secretory; and caudal exclusively secretory. Standard histochemical techniques detected neutral glycoproteins from the secretion of the tubules of the caudal region. Espermatogenesis occurred in cysts throughout the whole extension of the wall of the seminiferous tubules, which anastomosis themselves and liberated the spermatozoa into the lumen of the espermatic ducts. The ovaries were paired, saculiformes and, histologically, they presented ovigerous lamellae that contained the cells of ovogenic ancestry. The oocytes were classified into four stages, based on their cytological characteristics and the cell layers that surrounded them. Post-ovulatory follicles and vitelogenic oocytes in the follicular atresia process also were observed.

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“…The testicular organisation of the Lusitanian toadfish is typical of most teleosts and corresponds to the ''unrestricted'' or ''lobular'' type (Billard, 1986;Grier, 1981). Spermatogenesis occurs within cysts where germ cells undergo synchronous differentiation.…”

Section: Discussionmentioning

confidence: 99%

Morphometric changes and sex steroid levels during the annual reproductive cycle of the Lusitanian toadfish, Halobatrachus didactylus

Modesto

Canário

2003

General and Comparative Endocrinology

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Spermatogenesis and spermatology of some teleost fish species

Abstract: Summary. In teleost fish, the whole of the processes involved in the formation of spermatozoa and their release and in fecundation are extremely diverse.Two Introduction.

Cited by 392 publications

References 82 publications

Morphometric evaluation of the spermatogenesis in trahira Hoplias malabaricus (Bloch) (Characiformes, Erythrinidae)

Morphometric evaluation of the spermatogenesis in trahira Hoplias malabaricus (Bloch) (Characiformes, Erythrinidae)

Gonadal structure and gametogenesis of Loricaria lentiginosa Isbrücker (Pisces, Teleostei, Siluriformes)

Morphometric changes and sex steroid levels during the annual reproductive cycle of the Lusitanian toadfish, Halobatrachus didactylus

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