The solid black line indicates the line of best-fit from a phylogenetic reduced major axis regression, while the hashed red line indicates the isometric slope. As they become bisexual in later life, the dolphins work in packs to restrict the movement of female dolphins as they. The non-phylogenetically controlled residuals of vaginal length on total body length and the non-phylogenetically controlled residuals of cumulative vaginal fold length on total body length were used. Dolphins have a gang culture around finding and keeping sexual partners. Regression of cumulative vaginal fold length on vaginal length. The solid black lines indicate the lines of best-fit from a phylogenetic reduced major axis regression, while the hashed red lines indicate the isometric slopes. The tip of a dolphins clitoris is located lower than a womans, right at the dolphins vaginal opening. Regression of (A) vaginal length on total body length and (B) cumulative vaginal fold length on total body length.
The hashed white line is positioned where one vaginal fold was measured. The cumulative measurements of vaginal fold length were straight lines from the base of the vaginal folds to their respective distal tips that projected into the lumen of the vagina. Vaginal fold length was measured with a plastic scale positioned on the dorsal side of the fold. The black arrows point to eight vaginal folds in this specimen. Vaginal fold length measurement of an adult female Pacific white-sided dolphin ( Lagenorhynchus obliquidens).
The measurement was taken in cranial to caudal orientation from the base of the ectocervix to the cranial limit of the vulva. Vaginal length was measured with calipers along the midline of the dorsal vaginal wall. The reproductive tract is oriented in dorsal recumbency and splayed open. Vaginal length measurement of an adult female short-beaked common dolphin ( Delphinus delphis).
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