You are not currently logged in.
Access your personal account or get JSTOR access through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The Non-Cost of Brooding in Ambystoma opacum
Robert H. Kaplan and Martha L. Crump
Vol. 1978, No. 1 (Feb. 10, 1978), pp. 99-103
Stable URL: http://www.jstor.org/stable/1443828
Page Count: 5
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Ambystoma opacum is the only member of a primarily aquatic-breeding genus of salamanders that remains with its eggs after terrestrial deposition. In order to determine the energetic cost of this "parental investment," we compared dry weight, total calories, weight-specific caloric content and ash content in females that had just begun to brood with those near completion of brooding. Differences in these four variables between the two groups are not significant at P ≤ 0.05. The argument that brooding females are at an energetic disadvantage because they are unable to forage is discarded because males collected from the area during the same period also had empty stomachs and intestines. We therefore suggest that there is no increase in energetic cost due to brooding in A. opacum.