Current address: Biologging Institute, 2-31-10, Rex Yushima 301, Yushima Bunkyo-ku, Tokyo 113-0034, Japan.
DOES ELASTIN CONTRIBUTE TO THE PERSISTENCE OF CORPORA ALBICANTIA IN THE OVARY OF THE COMMON DOLPHIN (DELPHINUS DELPHIS)
Article first published online: 25 APR 2006
Marine Mammal Science
Volume 22, Issue 4, pages 819–830, October 2006
How to Cite
Takahashi, Y., Ohwada, S., Watanabe, K., Ropert-Coudert, Y., Zenitani, R., Naito, Y. and Yamaguchi, T. (2006), DOES ELASTIN CONTRIBUTE TO THE PERSISTENCE OF CORPORA ALBICANTIA IN THE OVARY OF THE COMMON DOLPHIN (DELPHINUS DELPHIS). Marine Mammal Science, 22: 819–830. doi: 10.1111/j.1748-7692.2006.00050.x
- Issue published online: 25 APR 2006
- Article first published online: 25 APR 2006
- Received: 20 June 2005Accepted: 15 February 2006
- corpora albicantia;
- common dolphin;
- Delphinus delphis
The corpora albicantia (CAs) from the ovaries of 39 common dolphins (Delphinus delphis) caught in driving fisheries were used, and histologically and immunohistochemically examined. The area of each corpus albicans (CA) and the proportion of that area occupied by elastin were measured using NIH-image software. In all CAs, elastoid material (EM) was apparent although EM area varied in each CA. CAs increased in number with dolphin age. Smaller CAs contained a higher proportion of EM. EM was completely digested by elastase, but not by collagenase. Furthermore, EM was immunostained with anti-α-elastin antibody. These results demonstrated that EM was elastin. The present study is the first to describe the presence of elastin in cetacean CAs. The higher proportion of elastin in small-sized CAs of common dolphins is suggested as the likely cause of the persistence of CA.