... specimens, and tail length was in positive allometry in juveniles, but negative in adults. Sexual dimorphism was evident in body size and shape. Males grew larger and reached maturity at larger sizes than females. While juvenile shape did not differ between the sexes, mature males had proportionately longer...

... to vary across Tasmania and the findings suggest there is a focus on particular food sources at a particular locality. Prey partitioning between the sexes may account for some of this variation since this owl has a large degree of sexual dimorphism by size. Corresponding author: Email: Michael.Todd...

... with head size. The modal number of presacral vertebrae is 23. There is no sexual dimorphism in either the number of postsacral vertebrae or the number of postsacral vertebrae with transverse processes. Hyperphalangy occurs in 3.2% of specimens. Gross variation in the sacral vertebrae occurs in 5.3...

... were collected from bycatch to investigate the species' reproductive biology. Males were found to mature at a disc width of 22 cm, while females reached sexual maturity at 26 cm disc width. Of all the T. testacea examined, 53% of males (n=159) and 16% of females (n=62) were sexually mature. Only...

... Range, Northern Territory. Additionally, we provide notes on sexual dimorphism, antipredator behaviour and shelter site use in this species. We discuss how some of this novel information may explain why this species is so rarely detected and suggests that this cryptic agamid may be much more common...

... revealed that the core period for calling for L. jervisiensis was April to July. Opportunistic observations of territorial behaviour and dynamic sexual dichromatism were also recorded. Litoria jervisiensis breeding call agonistic behaviour sexually dynamic dichromatism Anstis, M...

... specimens from mainland localities, and differ in several respects from our findings. Mondrain snakes are larger than their mainland conspecifics, and males grow much larger than females on Mondrain (mean adult snout-vent lengths of 456 vs 403 mm). In strong contrast, mainland snakes display little sexual...

... eggs, which hatch as large, slenderbodied offspring averaging 406 mm snout-vent length (SVL) and 16.9 g in weight. Growth is rapid, with captive males attaining sexual maturity at around 1000 mm SVL and approximately 18 months of age; females mature at 1400 mm and 30 months. Many hatchlings were...

...E. Meyer; K. A. Murray; H.B. Hines Intra-specific communication in anuran amphibians is primarily achieved with vocal signals (Duellman and Trueb 1994). However, some species also use visual displays for interand/ or intra-sexual communication (Hodl and Amezquita 2001). Such displays include...

... includes large numbers of maturing females or when substantial sexual dimorphism occurs, such as in Philypnodon grandiceps and Mogurnda adspersa . The relationships provided support for using shape to sex some species. 4352011 AustralianZoologist volume 35 (3) Introduction Length - weight relationships...

...%) and a seminiferous epithelial cell cycle (8 stages identified) with a predominance of pre-meiotic stages (61.4 %) and Sertoli cells with unusually large nuclei. A GnRH stimulation test conducted on four different intact sexually mature Bilbies using 2pg Buserelin resulted in maximal plasma androgen secretion 30...

...David Bain Over fifty percent of bird species are sexually monomorphic and the Eastern Bristlebird Dasyornis brachypterus was previously considered to be part of this majority. To test this suggestion, morphological characteristics were measured on live and preserved D. brachypterus , with sex...

... Royal Zoological Society of New South Wales 2018 escalated conflict mating system sexual selection snake 434 2018 Introduction Our understanding of mating systems in snakes is based primarily on studies of natricine colubrids that court and mate in large aggregations in Europe and North...

...., 1979. Sexual selection and sexual dimorphism in the Amphibia. Copeia 1979(2): 297-306. Sexual selection and sexual dimorphism in the Amphibia Copeia 1979 297 306 Tyler, M. J., 1989. Australian Frogs. Viking O’Neill: Ringwood, Victoria. 220 pp. Australian Frogs van de Mortel, T. F...

... decline in food availability. eastern bent-winged bats and greater in South Australian than Victorian southern bent-winged bats. Sexual dimorphism in this study was similar to previous Miniopterus studies (Sramek and Benda 2014) with the When forearm lengths were compared between 2001 and exception...

...: 51-58. Breeding in the freshwater crayfish Paranephrops planifrons White New Zealand Journal of Marine and Freshwater Research 1 51 58 Lindqvist, O.V. and Lahti, E. 1983. On the sexual dimorphism and condition index in the crayfish Astacus astacus L. in Finland. Freshwater Crayfish 5: 3...

... hollow and the length of the dead nestling lying to one again at various intervals from 1977 to 1996 (Saunders side of the hollow we estimated the snake was about 2 m and Ingram 1998). From 2009 to 2019 the population was long and, at that length, given the sexual dimorphism in monitored using the same...

... storage capacities Angus, R. A., Stanko, J., Jenkins, R. D. and Watson, R. D. 2005. Effects of 17-ethylestradiol on sexual development of male western mosquitofish (Gambusia affinis). Comparitive Biochemistry and Physiology, Part C, 140: 330-339. Effects of 17-ethylestradiol on sexual development...