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Fecal progestagen concentration as an indicator of the estrous cycle and pregnancy in moose

TitleFecal progestagen concentration as an indicator of the estrous cycle and pregnancy in moose
Publication TypeJournal Article
Year of Publication1995
AuthorsSchwartz, CC, Monfort, SL, Dennis, PH, Hundertmark, KJ
JournalJournal of Wildlife Management
Volume59
Pagination580–583
Keywordsalaska, alces alces, estrus, feces, female ungulates has implications, for ecological, gestation, moose, ovarian activity in, progestagen, reproduction, reproductive synchrony, studies of breeding and, the capability to track
Abstract

We established a noninvasive technique for monitoring the estrous cycle and pregnancy in moose (Alces alces). We collected fecal samples daily from nonpregnant yearling females (n = 3) for the duration of 3-4 estrous cycles, and weekly throughout gestation from 3 pregnant adult cows. We analyzed samples by radioimmunoassay (RIA) to quantify the concentration of progestagen metabolites. Peak luteal phase concentrations of progestagens were 4.5 ? 0.9 (SD) ,g/g compared with 0.5 ? 0.1 ;g/g during the follicular phase. Observed (n = 7) and suspected (n = 2) matings all occurred within ?2 days of the nadir in progestagen excretion. Fecal progestagens were above peak luteal phase concentrations by the eighth week of gestation (>77 g/g of feces, P < 0.001), permittinga ccurate pregnancyd etection by this time. Relative concentrations of fecal progestagens during the follicular phase, luteal phase, and pregnancy were 1:10:35, respectively. Monitoring fecal progestagen is a useful noninvasive technique for tracking ovarian activity and pregnancy in moose.

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