Page 2 - ஆம்பிபியன் குறுக்குவெட்டுகள் News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Stay updated with breaking news from ஆம்பிபியன் குறுக்குவெட்டுகள். Get real-time updates on events, politics, business, and more. Visit us for reliable news and exclusive interviews.

Top News In ஆம்பிபியன் குறுக்குவெட்டுகள் Today - Breaking & Trending Today

"Disease influences male advertisement and mating outcomes in a critica" by Shannon R. Kelleher, Ben C. Scheele et al.


Abstract
The sublethal effects of infectious disease on reproductive behaviour and mating success are not well understood. Here, we investigated predictors of male mating success in one of Australia s most critically endangered vertebrates: the northern corroboree frog, Pseudophryne pengilleyi. Using a genomic approach to assign parentage, we explored whether infection with the amphibian chytrid fungus Batrachochytrium dendrobatidis (Bd), a pathogen responsible for amphibian declines globally, influenced male calling behaviour and mating success. We also explored whether male mating success was predicted by phenotypic traits (age, body size, coloration, call characters) that potentially signal genetic quality, and the soil moisture (water potential) of male-constructed terrestrial nests, which may directly impact offspring survival. We found that Bd significantly influenced male advertisement; Bd-infected males produced calls with significantly higher pulse repetition rates th ....

Chytrid Fungus , Emale Mate Choice , Ale Mating Success , Rating System ,

"Evidence that genetic compatibility underpins female mate choice in a " by Phillip G. Byrne, J. Scott Keogh et al.

Mate choice for genetic benefits remains controversial, largely because few studies have estimated the relative contributions of additive and non-additive sources of genetic variation to offspring fitness. Moreover, there remains a deficit of these estimates for species where female-mate preferences have been quantified in the wild, especially species characterized by monandry or monogamy. Here, we use artificial fertilization techniques combined with a cross-classified breeding design to simultaneously test for “good genes” and “compatible genes” benefits of mate choice in the monandrous red backed toadlet (Pseudophryne coriacea). In addition, we used a genomic approach to estimate effects of parental-genetic relatedness (assessed using 27, 768 single nucleotide polymorphisms) on offspring fitness. Our results revealed no significant additive genetic effects (sire effects), but highly significant non-additive genetic effects (sire × dam interaction effects), on fertilization ....

Ompatible Genes , Good Genes , Fate Choice ,

"Hormone-induced ovulation and artificial fertilisation in four terrest" by Aimee J. Silla and Phillip G. Byrne


Abstract
The development and application of reproductive technologies has great potential to enhance the conservation management of threatened amphibians globally. The present study quantified the efficacy of protocols previously developed for Pseudophryne guentheri for hormonally inducing egg release and artificial fertilisation in three additional terrestrial-breeding species of Australian ground frog; namely Pseudophryne bibronii, Pseudophryne coriacea and Heleioporus eyrei. Females of each species were administered a priming dose of 0.4 µg g-1 of gonadotropin-releasing hormone analogue (GnRHa), followed by an ovulatory dose of 2 µg g-1 GnRHa. Egg release was achieved in all species (response 94.7-100%), but early embryo survival differed significantly, ranging from 23.8% to 89.3%. Overall, the protocols were considered effective in P. guentheri, P. bibronii and P. coriacea, but further protocol refinement is required for H. eyrei. ....

Amete Release , Reproductive Technologies ,