naa a22 4500 510744958 CHVBK 20180411083042.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s13364-012-0115-8 doi (NATIONALLICENCE)springer-10.1007/s13364-012-0115-8 Estimation of the fertility rates of Japanese wild boars ( Sus scrofa leucomystax ) using fetuses and corpora albicans [Elektronische Daten] [Tomoka Tsuji, Mayumi Yokoyama, Makoto Asano, Masatsugu Suzuki] Effective population control of Japanese wild boar (Sus scrofa leucomystax) requires reliable information about population dynamics. Fertility rate is the fundamental component of reproduction to evaluate population dynamics. However, little is known regarding the fertility rate of Japanese wild boar. The traditional hunting practices make it difficult to obtain pregnant females and calculate the fertility rate by checking fetuses as is performed in other countries. Therefore, we focused on the corpora albicans (CA) as the CA remains in the ovaries of postpartum females after pregnancy. This study aimed to evaluate the utility of CA and estimate the fertility rate of Japanese wild boars using CA. Histological analysis of ovaries enabled us to discriminate type 1 CA, which remains for 1year after breeding. Type 1 CA is a superior indicator compared with lactation in the non-pregnancy season because it allows verification of postpartum females over a long period. The fertility rate was calculated by the combination of pregnant and postpartum females using fetuses and type 1 CA from April to November. The fertility rate of the females captured after the second pregnancy season was 90.3% during the pregnancy period and 100% during the non-pregnancy period. The high fertility rate of adult females suggests that intensive adult female harvesting is needed. Our new method to determine fertility rates contributes to developing a monitoring system to adequately control Japanese wild boar population. Mammal Research Institute, Polish Academy of Sciences, Białowieża, Poland, 2012 Fertility rate nationallicence Corpora albicans nationallicence Fetus nationallicence Non-pregnancy season nationallicence Japanese wild boar ( Sus scrofa leucomystax ) nationallicence Tsuji Tomoka The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut Yokoyama Mayumi Wildlife Management Research Center, Hyogo, 940 Sawano, Aogaki-cho, 669-3842, Tanba, Hyogo, Japan aut Asano Makoto Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut Suzuki Masatsugu Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut Acta Theriologica Springer-Verlag 58/3(2013-07-01), 315-323 0001-7051 58:3<315 2013 58 13364 https://doi.org/10.1007/s13364-012-0115-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s13364-012-0115-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tsuji Tomoka The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut NATIONALLICENCE 700 1- Yokoyama Mayumi Wildlife Management Research Center, Hyogo, 940 Sawano, Aogaki-cho, 669-3842, Tanba, Hyogo, Japan aut NATIONALLICENCE 700 1- Asano Makoto Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut NATIONALLICENCE 700 1- Suzuki Masatsugu Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, 501-1193, Gifu, Japan aut NATIONALLICENCE 773 0- Acta Theriologica Springer-Verlag 58/3(2013-07-01), 315-323 0001-7051 58:3<315 2013 58 13364 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer