دراسة بيولوجيا التكاثر والخصوبة عند الرخوي Strombus persicus (Sowerby,1842) في شاطئ اللاذقية (Gastropoda: Strombidae)
Abstract
The research determination, for the first time, with studying the absolute and relative fecundity, The identification of reproductive times and developmental stages of both ovaries and testes of Gastropod Strombus persicus in the shore of Lattakia.
This research was achieved between March 2016 to February 2017 at Afmia area from Lattakia shore, the shell length varied between 3.43 and 6.47 cm, while the total weight 9.12 and 24.2 g, the absolute fecundity varied between 1.052 and 3.661 million egg, and between 0.829 to 2.753 million egg/g body weight for relative fecundity, all the correlation relationships were positive and solid, while spawning took place from mid-May to the end of October, with peak during August.
Five stages were determined for gonadal development (ovaries or testises), respectively: inactive, developing, mature, partially spawned, spent.
تناول هذا البحث لأول مرة دراسة الخصوبة المطلقة والنسبية، وتحديد أوقات التكاثر، ومراحل تطور المبايض والخصى عند بطني القدم Strombus persicus في شاطئ مدينة اللاذقية.
نفذ هذا البحث خلال الفترة من آذار 2016 وحتى شباط لعام 2017، في منطقة أفاميا من شاطئ مدينة اللاذقية، تراوحت أطوال القوقعة ما بين 6.47 و 3.43 سم، و الوزن الكلي 24.2 و 9.12 غ، تراوحت قيمة الخصوبة المطلقة ما بين 1.052 و3.661 مليون بيضة والخصوبة النسبية ما بين 0.829 و2.753 مليون بيضة /غ من وزن الجسم، وكانت جميع علاقات الإرتباط إيجابية وموثوقة، أما وضع البيض فحدث خلال الفترة الممتدة من منتصف شهر أيار إالى نهاية تشرين الأول والذروة خلال شهر أب.
حددت خمس مراحل لتطور المنسل (المبايض أو الخصى) عند الإناث والذكور هي بالترتيب: الخمول، التطور أو التنامي و النضج و الوضع الجزئي للبيض و الإنهاك أو التلاشي.
Downloads
Published
How to Cite
Issue
Section
License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
The authors retain the copyright and grant the right to publish in the magazine for the first time with the transfer of the commercial right to the Tishreen University Journal for Research and Scientific Studies - Biological Sciences Series
Under a CC BY- NC-SA 04 license that allows others to share the work with of the work's authorship and initial publication in this journal. Authors can use a copy of their articles in their scientific activity, and on their scientific websites, provided that the place of publication is indicted in Tishreen University Journal for Research and Scientific Studies - Biological Sciences Series . The Readers have the right to send, print and subscribe to the initial version of the article, and the title of Tishreen University Journal for Research and Scientific Studies - Biological Sciences Series Publisher
journal uses a CC BY-NC-SA license which mean
You are free to:
- Share — copy and redistribute the material in any medium or format
- Adapt — remix, transform, and build upon the material
- The licensor cannot revoke these freedoms as long as you follow the license terms.
- Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- NonCommercial — You may not use the material for commercial purposes.
- ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
- No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.