Life history and reproductive ecology of the endangered Itasenpara bitterling Acheilognathus longipinnis (Cyprinidae) in the Himi region, central Japan

2015 ◽  
Vol 87 (3) ◽  
pp. 616-633 ◽  
Author(s):  
M. Nishio ◽  
T. Kawamoto ◽  
R. Kawakami ◽  
K. Edo ◽  
Y. Yamazaki
Keyword(s):  
Life History ◽  
Reproductive Ecology ◽  
Central Japan

Reproductive Ecology of The Allied Rock-wallaby, Petrogale assimilis.

1996 ◽  
Vol 19 (2) ◽  
pp. 209
Author(s):  
R. Delaney
Keyword(s):  
Life History ◽  
Sex Ratio ◽  
Sexual Maturity ◽  
Post Partum ◽  
Reproductive Ecology ◽  
Oestrous Cycle ◽  
Embryonic Diapause ◽  
Minimum Age

Petrogale assimilis has a typical life history and reproductive ecology for a macropodid of its size. Both sexes are capable of reproducing continuously; gestation is about the same length as the oestrous cycle (approximately one month); a single young is born and, a post-partum oestrus and embryonic diapause probably occurs. The sex ratio of young is unbiased. Pouch young remain permanently attached to the teat until 110 - 143 days (n=11). Permanent exit from the pouch occurs at 180 - 231 days (mean=201 days, n=25), and weaning occurs between 267 - 387 days (n=5). Sexual maturity occurs at a minimum age of 17.5 months in females and 23 months in males.

Reproductive Ecology and Life History of Female Sonoran Desert Tortoises (Gopherus morafkai)

2018 ◽  
Vol 32 (1) ◽  
pp. 34-50 ◽  
Author(s):  
Roy C. Averill-Murray ◽  
Terry E. Christopher ◽  
Brian T. Henen
Keyword(s):  
Life History ◽  
Sonoran Desert ◽  
Reproductive Ecology ◽  
Gopherus Morafkai ◽  
History Of

Life history and reproductive ecology of White's skink, Egernia whitii

2005 ◽  
Vol 53 (6) ◽  
pp. 353 ◽  
Author(s):  
DG Chapple
Keyword(s):  
Life History ◽  
Litter Size ◽  
Reproductive Ecology ◽  
Climatic Conditions ◽  
Colour Pattern ◽  
Offspring Size ◽  
Adult Sex Ratio ◽  
Pattern Polymorphism ◽  
Comparison Of The Results ◽  
Colour Morphs

The life history and reproductive ecology of White’s skink, Egernia whitii, was examined in a population in the Australian Capital Territory using both field and genetic studies. Colour pattern polymorphism was evident within the population, with both patterned and plain-back morphs present. Lizards typically took 3 years to reach sexual maturity, with the size at maturity being ~75 mm snout–vent length (SVL) in both sexes. There was an even overall adult sex ratio, although a slight female-bias was evident in plain-back individuals. Sexual dimorphism was evident, with males having longer and wider heads, and females having larger body size. Females generally bred annually, with mating occurring in September–October and parturition in late January–February, although the litter was produced over several days (2–10 days, mean 4 days). Litter size ranged from one to four (mean of 2.5). There was a significant relationship between maternal SVL and both litter size and relative clutch mass, but these trends were not consistent between colour morphs. An inverse relationship between litter size and offspring size (SVL and mass) was found. Comparison of the results with previous investigations of E. whitii indicates substantial geographic variation in life-history traits that is presumably associated with latitudinal variation in climatic conditions.

Life history ofEuphausia similis (crustacea, euphausiacea) in Sagami Bay, central Japan

1990 ◽  
Vol 46 (6) ◽  
pp. 237-249 ◽  
Author(s):  
Yuichi Hirota ◽  
Takahisa Nemoto ◽  
Ryuzo Marumo
Keyword(s):  
Life History ◽  
Sagami Bay ◽  
Central Japan
Sign in / Sign up

Export Citation Format

Share Document