Morphological Aspects of Gonadal Morphogenesis inBufo bufo (Amphibia anura): Bidder's Organ Differentiation
نویسندگان
چکیده
منابع مشابه
Morphological re-evaluation of the parotoid glands of Bufo ictericus (Amphibia, Anura, Bufonidae)
Multicellular glands in the amphibian integument represent a signifi cant evolutionary advance over those of fi shes. Bufonids have parotoid glands, symmetrically disposed in a post-orbital position. Their secretion may contribute to protection against predators and parasites. This study provides a re-evaluation of the morphology of the Bufo ictericus parotoid glands. The parotoid gland integum...
متن کاملSperm concentration and fertilization rate in Bufo arenarum (Amphibia: Anura).
The influence of sperm concentration upon the fertilization rate of Bufo arenarum oocytes was determinated. The experimental results were analysed according to the theories of Rothschild and Swann, and Hultin and Hagström for Psammechinus miliaris. The experimental results agreed with the predictions of the latter theory. Since Bufo arenarum and Psammechinus miliaris oocytes differ in both size...
متن کاملزیستشناسی و الگوی غذایی گونه آسیب‌پذیر وزغ تالشی (Bufo eichwaldi) (Amphibia; Anura; Bufonidae) در ایران
چکیده دوزیستان شکارچیان فرصتطلبی هستند که از منابع غذایی با فراوانی بیشتر در محیط اطرافشان تغذیه میکنند. این گروه، به‌دلیل تغذیه از حشرات، دارای اهمیت بسزایی در تعادل و کنترل بیولوژیکی آفات کشاورزی اکوسیستمهای مختلف هستند. در این تحقیق که در سال 1395 در شمال غرب استان گیلان انجام گرفت، ضمن بررسی وضعیت زیستی گونه در معرض آسیب وزغ تالشی (Bufo eichwaldi)، محتویات معده57 نمونه، به روش شستشوی معد...
متن کاملKaryological and flow cytometric evidence of triploid specimens in Bufo viridis (Amphibia Anura).
Karyological and flow cytometric (FCM) analyses were performed on a group of 14 green toads of the Bufo viridis species from seven Eurasian populations. Both approaches gave concordant results concerning the DNA ploidy level. All the populations examined were represented exclusively by diploid or tetraploid specimens, except one, where triploids were found. Results evidenced an interpopulation ...
متن کاملMolecular cloning and analysis of Myc modulator 1 (Mm-1) from Bufo gargarizans (Amphibia: Anura)
The protein of Myc modulator 1 (Mm-1) has been reported to repress the transcriptional activity of the proto-oncogene c-Myc in humans. Moreover, it was shown to be the subunit 5 of human prefoldin (PFD). So far, this gene and its homologs have been isolated and sequenced in many organisms, such as mammals and fish, but has not been sequenced for any amphibian or reptile. In order to better unde...
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ژورنال
عنوان ژورنال: The Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
سال: 2007
ISSN: 1932-8486,1932-8494
DOI: 10.1002/ar.20521