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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.
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