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Histological description of oogenesis and spermatogenesis in the cultured shrimp, Litopenaeus vannamei. Both processes were studied in cultured organisms under reproduction conditions in the laboratory. Spermatogenesis was characterized at light microscopy from spermatogonia and their gradual maturation into primary and secondary spermatocytes, early, mid and advanced spermatids and sperm.

The process is synchronous in regions of seminiferous tubules, and asynchronous in neighboring tubules, generating cells at different stages up to mid spermatids in the testicles. Advanced spermatids and spermatozoa were only observed in the vasa deferentia; this finding appears not to be universal in Penaeidae.

A pesar de la importancia comercial de L. El ovario es transparente sin delineamiento distinguible. Estado II: ovario en desarrollo temprano. Estado III: ovario en desarrollo. El ovario es visible como una banda gruesa amarilla. Estado IV: ovario maduro. El apareamiento y desove son inminentes en este estado. Tabla 1. Table 1. Relation between oocyte development and visual evaluation of ovarian maturation in Litopenaeus vannamei. El desarrollo de los oocitos de L. Figura 1. Figure 1.

Early phases of oogenesis in Litopenaeus vannamei. Figura 2. Figure 2. Advanced stages of oogenesis in Litopenaeus vannamei. Cada macho de L. Figura 3. Figure 3. Stages of spermatogenesis in testicles of Litopenaeus vannamei.

Los espermatocitos primarios Fig. Figura 4. Figure 4. Spermiogenesis in seminiferous ducts and vasa deferentia of Litopenaeus vannamei and L. Palacios et al. Con base en la escala HS Palacios et al. Sin embargo, los estudios de Medina , Abraham et al. Las observaciones del presente estudio para L. Se agradecen los comentarios enriquecedores de los evaluadores. Spermatogenesis and spermatozoal ultrastructure in Metapenaeus monoceros Fabricius, Indian Journal of Fisheries 54 1 : The reproductive conditions of male shrimps, genus Penaeus , sub-genus Litopenaeus open thelyca penaeoid shrimps.

A review. Aquaculture The histological structure of the androgenic gland and cellular cord of the male reproductive system of adult Litopenaeus and Rimapenaeus byrdi. Journal of Crustacean Biology 32 3 : Sperm maturation and capacitation in the open thelycum shrimp Litopenaeus Crustacea: Decapoda: Penaeoidea.

Sperm capacitation of the shrimp Litopenaeus vannamei. Aquaculture Research Spermatophore structure and anatomy of the ejaculatory duct in Penaeus setiferus, P. Transactions of the American Microscopical Society 2 : A handbook of normal penaeid shrimp histology, pp. Qualitative and quantitative analysis of the ovarian maturation process of Penaeus vannamei after a production cycle.

Invertebrate Reproduction and Development 43 1 : Unusual testicular lobe system in the white shrimps, Penaeus setiferus Linnaeus, and P. Crustaceana The state of world fisheries and aquaculture , pp. A transmission electron microscopy investigation: the membrane complex in spermatogenesis of Fenneropenaeus chinensis. Cytotechnology A study of the reproductive organs of the common marine shrimp Penaeus setiferus L. The Biological Bulletin Spermiogenesis and sperm structure in the shrimp Parapenaeus longirostris Crustacea: Dendrobranchiata : comparative aspects among decapods.

Marine Biology Spermatogenesis and spermatophore formation in the Indian white prawn Penaeus indicus. Journal of the Marine Biological Association of India 35 : Ovarian staging in eyestalk ablated females of Farfantepenaeus paulensis : a histologic, morphometric, and biochemical analysis. Journal of Crustacean Biology 27 2 : Assessment of ovarian development and its relation to mating in wild and pond-reared Litopenaeus vannamei shrimp in a commercial hatchery.

Journal of the World Aquaculture Society 34 4 : Invertebrate Reproduction and Development 35 3 : Penaeoid and Sergestoid shrimps and prawns of the world keys and diagnoses for the families and genera.

Structure and function of the vas deferens in the shrimp Penaeus setiferus : segments Journal of Crustacean Biology In vitro manipulation of egg activation in the open thelycum shrimp Litopenaeus.

Spermiogenesis in the marine shrimp, Sicyonia ingentis. Characterization of male reproductive tract degenerative syndrome in captive penaeid shrimp Penaeus setiferus. Ovarian maturation stages of the wild giant tiger prawn, Penaeus monodon Fabricius.

Distribution and changes of serotonin and dopamine levels in the central nervous system and ovary of the Pacific white shrimp, Litopenaeus vannamei , during ovarian maturation cycle. Cell and Tissue Research Growth and reproduction of the penaeid prawn Metapenaeus dobsoni Miers in brackishwater environment. Oocyte development in the kuruma prawn Penaeus japonicus. Induced ovarian maturation of Penaeus vannamei by implantation of lobster ganglion. Journal of the World Aquaculture Society 19 4 : Servicios Personalizados Revista.


Espermatozoides y óvulos: todo sobre las células sexuales humanas



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