Ophiolepis paucispina is a small brittlestar that produces large yolky eggs
and has ovoviviparous development. Ultrastructural examination suggests that oogenesis
is supported by exogenously derived nutrients. During oogenesis, oocytes evaginate into
the genital haemal sinus. As the oocytes grow, they are surrounded by the haemal sinus,
although they remain separated from the haemal fluid by a basal lamina. Endocytotic
activity is prevalent throughout oogenesis, indicating uptake of exogenous material.
The ER and Golgi complex appear to be involved in elaboration of the yolk bodies. It is proposed that yolk precursors formed outside the oocyte are delivered to the oocytes by
the genital haemal sinus and that this sinus functions as an intragonadal nutrient storage
organ.
Member of
Contributors
Publisher
A. A. Balkema.
Date Issued
1988
Note
Language
Type
Genre
Form
Extent
9 p.
Subject (Topical)
Identifier
FA00007374
Additional Information
Ophiolepis paucispina is a small brittlestar that produces large yolky eggs
and has ovoviviparous development. Ultrastructural examination suggests that oogenesis
is supported by exogenously derived nutrients. During oogenesis, oocytes evaginate into
the genital haemal sinus. As the oocytes grow, they are surrounded by the haemal sinus,
although they remain separated from the haemal fluid by a basal lamina. Endocytotic
activity is prevalent throughout oogenesis, indicating uptake of exogenous material.
The ER and Golgi complex appear to be involved in elaboration of the yolk bodies. It is proposed that yolk precursors formed outside the oocyte are delivered to the oocytes by
the genital haemal sinus and that this sinus functions as an intragonadal nutrient storage
organ.
and has ovoviviparous development. Ultrastructural examination suggests that oogenesis
is supported by exogenously derived nutrients. During oogenesis, oocytes evaginate into
the genital haemal sinus. As the oocytes grow, they are surrounded by the haemal sinus,
although they remain separated from the haemal fluid by a basal lamina. Endocytotic
activity is prevalent throughout oogenesis, indicating uptake of exogenous material.
The ER and Golgi complex appear to be involved in elaboration of the yolk bodies. It is proposed that yolk precursors formed outside the oocyte are delivered to the oocytes by
the genital haemal sinus and that this sinus functions as an intragonadal nutrient storage
organ.
Florida Atlantic University. Harbor Branch Oceanographic Institute contribution 600
This manuscript is an author version with the final publication available
and may be cited as: Byrne, M. (1988). Evidence for endocytotic incorporation of nutrients from the
haemal sinus by the oocytes of the brittlestar Ophiolepis paucispina. In R. D. Burke, P. V. Mladenov, P.
Lambert, & R. L. Parsley (Eds.), Proceedings of the Sixth International Echinoderm Conference, Victoria,
23-28 August 1987 (pp. 557-563). Rotterdam; Brookfield, VT: A. A. Balkema.
and may be cited as: Byrne, M. (1988). Evidence for endocytotic incorporation of nutrients from the
haemal sinus by the oocytes of the brittlestar Ophiolepis paucispina. In R. D. Burke, P. V. Mladenov, P.
Lambert, & R. L. Parsley (Eds.), Proceedings of the Sixth International Echinoderm Conference, Victoria,
23-28 August 1987 (pp. 557-563). Rotterdam; Brookfield, VT: A. A. Balkema.
Date Backup
1988
Date Text
1988
Date Issued (EDTF)
1988
Extension
FAU
IID
FA00007374
Organizations
Attributed name: Harbor Branch Oceanographic Institute
Person Preferred Name
Byrne, M.
Physical Description
9 p.
Title Plain
Evidence for endocytotic incorporation of nutrients from thehaemal sinus by the oocytes of the brittlestar Ophiolepis paucispina.
Origin Information
1988
A. A. Balkema.
Brookfield, VT
Place
Brookfield, VT
Title
Evidence for endocytotic incorporation of nutrients from thehaemal sinus by the oocytes of the brittlestar Ophiolepis paucispina.
Other Title Info
Evidence for endocytotic incorporation of nutrients from thehaemal sinus by the oocytes of the brittlestar Ophiolepis paucispina.