. Advances in the study of mammalian behavior. Mammals. 136 Spec. Publ. Amer. Soc. Mamm. 7 10000 I \ r 5000 Momo -^1^oceneil^A^E^^. tan =2/3 50 100 500 1000 5000 10000 50000 Body weight, kilograms Fig. 12. Encephalization in Recent and fossil cetaceans, compared with that in man, chimpanzee, and early mammals (cf. Figure 9). Points 1-22 are Recent ceta- ceans, A-C are Miocene cetaceans, and I-III are Eocene cetaceans. (From Jerison 1978.) convex polygon is very obviously oriented along a shallower slope than V-i in brain-body space. These conclusions are based on quan- titative but non-numeric
. Advances in the study of mammalian behavior. Mammals. 136 Spec. Publ. Amer. Soc. Mamm. 7 10000 I \ r 5000 Momo -^1^oceneil^A^E^^. tan =2/3 50 100 500 1000 5000 10000 50000 Body weight, kilograms Fig. 12. Encephalization in Recent and fossil cetaceans, compared with that in man, chimpanzee, and early mammals (cf. Figure 9). Points 1-22 are Recent ceta- ceans, A-C are Miocene cetaceans, and I-III are Eocene cetaceans. (From Jerison 1978.) convex polygon is very obviously oriented along a shallower slope than V-i in brain-body space. These conclusions are based on quan- titative but non-numerical methods, which illustrate the utility of an analysis with convex polygons rather than EQs. Slopes (exponents in equations like Eq. 6) shallower than % occur often enough in the analysis of encephalization in land mam- mals to warrant a brief methodological digression on their signifi- cance. The shallow slopes can be understood with the help of a simple theory of encephalization (Jerison, 1977) that derives an equation only slightly more complex than Eq. 6 and does this from elementary neurological principles. The basic theoretical equation is: E= .lmP''^ + A (9). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Eisenberg, John Frederick; Kleiman, Devra G; American Society of Mammalogists. [Shippensburg, Pa?] : American Society of Mammalogists
Size: 1988px × 1257px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectmammals
