Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

Histology of a Bilateral Gynandromorph of the Blue Crab, Callinectes sapidus Rathbun (Decapoda: Portunidae)

Phyllis T. Johnson and Sara V. Otto
Biological Bulletin
Vol. 161, No. 2 (Oct., 1981), pp. 236-245
DOI: 10.2307/1540801
Stable URL: http://www.jstor.org/stable/1540801
Page Count: 10
  • Subscribe ($19.50)
  • Cite this Item
Histology of a Bilateral Gynandromorph of the Blue Crab, Callinectes sapidus Rathbun (Decapoda: Portunidae)
Preview not available

Abstract

The anatomy and histology of a gynandromorphic blue crab, Callinectes sapidus, are described. This is the first bilateral gynandromorph reported in a species of the Brachyura. Externally there was perfect bilateral division into male and female sides. The gonad on the male side was morphologically and histologically normal, but an AVD (anterior vas deferens) had been differentiated on the female side, and spermatogenesis was occurring through much of the female gonad. However, oogenesis was taking place in the apical portions of the gonadal lobes and a normal seminal receptacle was present. The crab had copulated as a female and may have copulated as a male. Function of the malacostracan AG (androgenic gland) in control of maleness is discussed. It is concluded that sexual differentiation in malacostracan species exhibiting bilateral gynandromorphism must depend on complex mechanisms. External sexual characters may be determined very early in embryogenesis, but differentiation of the gonads is apparently influenced by the AG and other parts of the hormonal systems.

Page Thumbnails

  • Thumbnail: Page 
236
    236
  • Thumbnail: Page 
237
    237
  • Thumbnail: Page 
238
    238
  • Thumbnail: Page 
239
    239
  • Thumbnail: Page 
240
    240
  • Thumbnail: Page 
[241]
    [241]
  • Thumbnail: Page 
242
    242
  • Thumbnail: Page 
243
    243
  • Thumbnail: Page 
244
    244
  • Thumbnail: Page 
245
    245