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Closed Access item Use of blubber levels of progesterone to determine pregnancy in free-ranging live cetaceans

Authors:Pérez, Sergi
García-López, Ángel
Stephanis, Renaud de
Giménez, Joan
García-Tiscar, Susana
Verborgh, Philippe
Mancera, Juan Miguel
Martínez-Rodríguez, Gonzalo
Keywords:Progesterone, Pregnancy, SW Iberian, Cetaceans, Measurement
Issue Date:27-Mar-2011
Citation:Marine Biology 158(7): 1677-1680 (2011)
Abstract:We tested the possibility of measuring progesterone levels in bubbler samples collected from free-ranging live bottlenose dolphins (n = 11) and long-finned pilot whales (n = 2) as a tool to evaluate the pregnancy status of individuals. Samples were collected during January 2004 and September–October 2005 in the Strait of Gibraltar and Gulf of Cadiz and used for sex-determination by genetic methods (skin samples) and for quantification of progesterone levels by enzyme immunoassay. Photo-identification tracking of females after taking the biopsy was used to observe the presence of newborns and, in this way, to determine if the female was pregnant at the time of sampling. Mean progesterone levels from pregnant bottlenose dolphins (n = 2) were around 9 times higher than those from non-pregnant females (n = 9), with no overlap between concentration ranges demonstrating that this method could constitute an effective tool for determining pregnancy in wild populations of bottlenose dolphins and other cetacean species.
Description:4 páginas, 1 tabla.
Publisher version (URL):http://dx.doi.org/10.1007/s00227-011-1676-9
E-ISSNmetadata.dc.identifier.doi = DOI:1432-1793
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