Sirenian (manatees and dugongs) reproductive endocrinology.

Autor: Brammer-Robbins E; Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA; Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, USA; Aquatic Animal Health Program, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA. Electronic address: e.brammerrobbins@ufl.edu., Cowart JR; Aquatic Animal Health Program, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA., Calderon M; Aquatic Animal Health Program, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA., Burgess EA; Anderson Cabot Center for Ocean Life, New England Aquarium, Boston MA, USA., Larkin IV; Aquatic Animal Health Program, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA., Martyniuk CJ; Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA; Center for Environmental and Human Toxicology, University of Florida, Gainesville, FL, USA.
Jazyk: angličtina
Zdroj: General and comparative endocrinology [Gen Comp Endocrinol] 2024 Sep 15; Vol. 356, pp. 114575. Date of Electronic Publication: 2024 Jun 20.
DOI: 10.1016/j.ygcen.2024.114575
Abstrakt: Reproductive hormones are essential to mating systems, behavior, fertility, gestation, parturition, and lactation in mammals and understanding the role of hormones in these processes is essential for species conservation. Sirenia is a unique order of marine mammals that include manatees, dugongs, and the extinct Steller's sea cow. Extant Sirenian species are all listed as vulnerable due to habitat loss, cold stress, boat strike trauma, harmful algal bloom toxicity, entanglements, and illegal hunting. Therefore, successful reproduction is essential to maintaining and increasing Sirenian populations. Understanding Sirenian reproductive behavior, endocrinology, and mating strategies will aid conservation and management efforts to protect and provide the proper conditions for successful reproduction. The objectives of this review were to synthesize the current knowledge regarding reproductive cycles and endocrinology of Sirenians and identify knowledge gaps for future investigation. The current literature on Sirenian reproductive physiology reports reproductive seasonality, sexual maturation, estrous cyclicity and acyclicity, pregnancy, and sex differences. However, there remain significant knowledge gaps on the cyclicity and pulsatile release of gonadotropins, maturation in females, and characterization of pregnancy hormone profiles throughout gestation. To date, there is no explanation for confirmed pattern for ovarian acyclicity, nor understanding of the function of the numerous accessory corpus luteum described in manatees. Research including a greater number of longitudinal and postmortem studies on a wider variety of wild manatee populations are important first steps. Taken together, understanding the reproductive endocrinology of these vulnerable and threatened species is critical for policy and management decisions to better inform protection initiatives.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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