Thyroid hormone concentrations associated with age, sex, reproductive status and apparent reproductive failure in the Amazon river dolphin (Inia geoffrensis )

Conservation Physiology
Todd R RobeckJanine L Brown

Abstract

This study was conducted to characterize immunoreactive thyroid hormone concentrations in wild Amazon river dolphins, also called boto (Inia geoffrensis) by age group, sex, pregnancy and lactation status, and to determine if thyroid hormone concentration differences could be detected between pregnant females with and without successful parturition outcomes. Radioimmunoassays were used to analyse total T3 and total T4 in 182 serum samples collected from 172 botos living in the Mamirauá Sustainable Development Reserve, in the Brazilian Amazon from 2003 through 2015. Age significantly affected tT3 and tT4 concentrations in males, with values in immature males and females being significantly lower than those in adult males, whereas no age effects were noted between immature females and adult non-pregnant, non-lactating females. Significant sex differences were noted in tT3 concentrations between immature males and females and in tT4 concentrations between adult males and females. These resulted in significant differences in the tT3:tT4 ratio between males and females within the immature and adult groups. Lactating and non-pregnant adult females had significantly higher tT3 concentrations than pregnant females, and this difference w...Continue Reading

References

Mar 1, 1971·The Journal of Endocrinology·P S Hopkins, G D Thorburn
May 26, 2004·Best Practice & Research. Clinical Endocrinology & Metabolism·Daniel Glinoer
Nov 10, 2005·Hormone and Metabolic Research = Hormon- Und Stoffwechselforschung = Hormones Et Métabolisme·S D MahajanN Kochupillai
Sep 20, 2006·Hormones : International Journal of Endocrinology and Metabolism·A Mortoglou, H Candiloros
Aug 9, 2007·Endocrine Development·Daniel Glinoer
Dec 4, 2010·Journal of Obstetrics and Gynaecology : the Journal of the Institute of Obstetrics and Gynaecology·R L KennedyA Rane
Jul 19, 2011·Journal of Thyroid Research·Christina Yarrington, Elizabeth N Pearce
Aug 1, 2007·Animal : an International Journal of Animal Bioscience·L Todini
Jun 28, 2012·The Journal of Clinical Endocrinology and Metabolism·Annemieke J LemAnita C S Hokken-Koelega
Sep 5, 2012·The Journal of Clinical Investigation·Gregory A Brent
May 7, 2014·General and Comparative Endocrinology·David C Kersey, Martin Dehnhard
Sep 10, 2015·Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians·Jennifer E FlowerAllison D Tuttle
Jan 1, 2016·General and Comparative Endocrinology·Karen J SteinmanJustine K O'Brien

❮ Previous
Next ❯

Citations


❮ Previous
Next ❯

Software Mentioned

Stata®
STATA

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

© 2021 Meta ULC. All rights reserved