Ultrastructural Study on the Ovarian Wall and the Oviduct of the Asellus aquaticus (Crustacea: Isopoda)

B. Melike ERKAN

Makale detayları

Ultrastructural Study on the Ovarian Wall and the Oviduct of the Asellus aquaticus (Crustacea: Isopoda)

Yazarlar:

B. Melike ERKAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Zoology 1998 Vol.22 Issue 4, pp.351-362

Belge Tipi:

Makale

Yayın Tarihi:

3/1998

Belge Dili:

Türkçe

Document ID (Org No.):

2000779620

Sıklık:

İki Aylık

eISSN:

1303-6114

pISSN:

1300-0179

Anahtar kelimeler:

Özet:

 

In this study the ovarium, ovarian wall and oviduct of Asellus aquaticus ( A. aquaticus) (Crustacea: Isopoda) were  investigated by stereomicroscopy, phase contrast microscopy and light microscopy. Long, tube-shaped, separate ovaries of A.  aquaticus are located dorsolateral to the gut. The germinal zone is confined to the ventral region of the ovary as a thin band. The  ovarian wall is composed of a few fibrous layers. The oviduct is located in the anterior one-third of the ovary, not in the central  part. The sheath of the oviduct was found to possess some muscle cells, a feature first noted in this study.  They appear to be different from the striated muscles of vertebrates, and are characterized by abundant cytoplasm, typical striated  muscle bands and the absence of sarcoplasmic reticulum owing to their presence in a confined region of the oviduct sheath. It is  suggested that the muscle cells act as a sphincter and provide elasticity which prevents tearing of the oviduct during discharge of  eggs from the ovarium.

 

In this study the ovarium, ovarian wall and oviduct of Asellus aquaticus ( A. aquaticus) (Crustacea: Isopoda) were  investigated by stereomicroscopy, phase contrast microscopy and light microscopy. Long, tube-shaped, separate ovaries of A.  aquaticus are located dorsolateral to the gut. The germinal zone is confined to the ventral region of the ovary as a thin band. The  ovarian wall is composed of a few fibrous layers. The oviduct is located in the anterior one-third of the ovary, not in the central  part. The sheath of the oviduct was found to possess some muscle cells, a feature first noted in this study.  They appear to be different from the striated muscles of vertebrates, and are characterized by abundant cytoplasm, typical striated  muscle bands and the absence of sarcoplasmic reticulum owing to their presence in a confined region of the oviduct sheath. It is  suggested that the muscle cells act as a sphincter and provide elasticity which prevents tearing of the oviduct during discharge of  eggs from the ovarium.

Makale detayları

Ultrastructural Study on the Ovarian Wall and the Oviduct of the Asellus aquaticus (Crustacea: Isopoda)

Yazarlar:

B. Melike ERKAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Zoology 1998 Vol.22 Issue 4, pp.351-362

Belge Tipi:

Makale

Yayın Tarihi:

3/1998

Belge Dili:

Türkçe

Document ID (Org No.):

2000779620

Sıklık:

İki Aylık

eISSN:

1303-6114

pISSN:

1300-0179

Crustacea

Isopoda

Ovary

Ovarian wall

oviduct.

Sayı

Makale detayları

Ultrastructural Study on the Ovarian Wall and the Oviduct of the Asellus aquaticus (Crustacea: Isopoda)

Yazarlar: B. Melike ERKAN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Zoology 1998 Vol.22 Issue 4, pp.351-362

Belge Tipi: Makale

Yayın Tarihi: 3/1998

Belge Dili: Türkçe

Document ID (Org No.): 2000779620

Sıklık: İki Aylık

eISSN: 1303-6114

pISSN: 1300-0179

Crustacea

Isopoda

Ovary

Ovarian wall

oviduct.

Sayı

Yazarlar:

B. Melike ERKAN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Zoology 1998 Vol.22 Issue 4, pp.351-362

Belge Tipi:

Makale

Yayın Tarihi:

3/1998

Belge Dili:

Türkçe

Document ID (Org No.):

2000779620

Sıklık:

İki Aylık

eISSN:

1303-6114

pISSN:

1300-0179