Size Dimorphism In N.a. Cyprinids?
#1 Guest_fundulus_*
Posted 25 August 2007 - 04:11 PM
That's all well and good, but I'm curious to compare it against any other N.A. cyprinids, especially Notropis species and closely related genera. I have a few species to compare this to, notably burrhead and silverstripe shiners, but I'd be grateful for any leads to others. As always, thanks!
#2 Guest_farmertodd_*
Posted 25 August 2007 - 08:48 PM
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http://www.bsu.edu/web/mpyron/ssd.pdf
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JO - Journal of Natural History
PB - Taylor & Francis
AU - Rabito, Felix G.
AU - Heins, David C.
TI - Spawning behaviour and sexual dimorphism in the North American cyprinid fish Notropis leedsi, the bannerfin shiner
SN - 0022-2933
PY - 1985
VL - 19
IS - 6
SP - 1155
EP - 1163
AB - The spawning behaviour and sexual dimorphism of the little known North American cyprinid fish, Notropis leedsi, is described based on observations made in laboratory aquaria. Notropis leedsi is a crevice spawning species, a trait characteristic of members of the subgenus Cyprinella. Males establish breeding territories through ‘mock battles’ and defend them by chasing away intruding males or, at times, through threat displays or ‘mock battles’. Although wild-caught males are significantly larger than females, sexual dimorphism is more pronounced in the colour pattern and fin size, especially the dorsal and anal fins.
The modes of spawning behaviour in the genus Notropis are reviewed. The relationship between the promiscuous mating system (polybrachygamy), the crevice spawning mode, and sexual dimorphism in N. leedsi are discussed in relation to current notions regarding sexual selection.
UR - http://www.informawo...222938500770721
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#3 Guest_fundulus_*
Posted 25 August 2007 - 08:55 PM
#5 Guest_haruspicator_*
Posted 19 October 2007 - 11:02 PM
shawn
#6 Guest_ashtonmj_*
Posted 20 October 2007 - 08:47 AM
#7 Guest_fundulus_*
Posted 20 October 2007 - 03:26 PM
For the telescope shiners, we have 162 males, size range 27.26 - 56.85 mm with a mean of 45.34 mm SL, and 133 females, size range 37.34 - 65.32 mm with a mean of 50.46 mm SL. I've been running t-tests because the data are normally distributed, it's easy, and everyone knows what you're talking about with a t-test. I'm open to suggestion otherwise.Intuitively I would think there would be a difference just like there is in Poeciliids (the most obvious example). Bruce what is the range and distribution like of the data? Even with that large of a sample size I could see how a T distribution might not be the best fit. Makes me curious to go back and look at all the lengths I have because I did distinguish sex and I have a whole lot more than one years worth available.
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