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Can spines tell a story? Investigation of echidna spines as a novel sample type for hormone analysis in monotremes
Gen Comp Endocrinol. 2022 May 14:114053. doi: 10.1016/j.ygcen.2022.114053. Online ahead of print.ABSTRACTThe short-beaked echidna (Tachyglossus aculeatus) is a monotreme endemic to Australia and New Guinea, and is the most widespread native mammal in Australia. Despite its abundance, there are considerable gaps in our understanding of echidna life history such as reproductive cycles in both sexes, patterns of stress physiology, and possible seasonal changes in metabolism. Slow-growing integumentary sample types comprised of keratin (hair, claw, etc.) have been used in other wildlife to assess these questions via analysis o...
Source: General and Comparative Endocrinology - May 17, 2022 Category: Endocrinology Authors: Fabio Braga Ana E Hunt Kathleen Dillon Danielle Minicozzi Michael C Nicol Stewart Buck C Loren Source Type: research

Biomarker-assisted assessment of aquatic health using the cosmopolitan common carp, Cyprinus carpio (L): a case study of bisphenol-A exposures
In conclusion, the study identified multiple molecular, cellular, and physiological markers that could be employed to detect early signs of BPA and more broadly EDC exposures. These markers in combination with a wide distribution of C. carpio should allow comparative studies of pollutants at environmental concentrations.PMID:34601693 | DOI:10.1007/s11356-021-16778-y
Source: Environmental Science and Pollution Research International - October 3, 2021 Category: Environmental Health Authors: Shanthanagouda Admane Holeyappa Amandeep Kaur Neelam Bansal Meera D Ansal Jawahar G Patil Naveenkumar Billekallu Thammegowda Vaneet Inder Kaur Ram Saran Sethi Source Type: research

Sex steroid hormones and the associated morphological changes in the reproductive tract of free-living males of the cururu stingray Potamotrygon wallacei
This study analyzed sex steroid hormones and morphology of the reproductive tract in free-living adult males of the cururu stingray (Potamotrygon wallacei). These stingrays were captured during the transition between drought and rising waters in the middle Rio Negro basin, which coincides with the reproductive period (spermatogenesis and copulation) of this endemic species. Levels of the plasma steroid hormones testosterone (T), 17 β-estradiol (E2), and progesterone (P4), the gonadosomatic and hepatosomatic indices, as well as histological characteristics of the testis and epididymis were evaluated. Three reproductive mat...
Source: General and Comparative Endocrinology - April 16, 2021 Category: Endocrinology Authors: Jaydione Luiz Marcon Ruben Dario Morales-Gamba Jos é Fernando Marques Barcellos Maria L úcia Góes de Araújo Source Type: research