This is consistent with Ridgway & Brownson (1984) who found that neonatal brain weight aver- aged 42.5% of the average adult brain weight in bottlenose dolphins. The estimated brain weight for the present specimen is 40.1% of the published average adult brain weight. Average adult brain weight for bottlenose dolphins is 1,824 g (Marino, 1998).
A pre- viously published value for average whole brain volume in newborn bottlenose dolphins was 713.0 cc (Marino, 1995). The MRI-based value is similar to the measured brain weight of 766 g at the time of necropsy. When converted to weight by multiplication with the value of the spe- cific gravity of water, the estimate of whole brain weight from the MR images was 730.69 g. The measured whole brain volume of the specimen from MR scans was 705.3 cc.
#Dolphin brain series
These stained section series are from the Yakovlev- Haleem Collection at the National Museum of Health and Medicine and the Welker Collection at the University of Wisconsin at Madison.
Additionally, scans also were compared with several complete alternate series of sections of the adult bottlenose dolphin brain, which were stained, respectively, for cell bodies (Nissl method) and for myelinated fibers in the same three orthogonal planes (coro- nal or transverse, sagittal, and horizontal). (1980), as well as pub- lished neuroanatomical atlases based on MR scans of an adult bottlenose dolphin brain (Marino et al., 2001c).
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