Does elastin contribute to the persistence of corpora albicantia in the ovary of the common dolphin (Delphinus delphis)

Yuko Takahashi, Shyuichi Ohwada, Kouichi Watanabe, Yan Ropert-Coudert, Ryoko Zenitani, Yasuhiko Naito, Takahiro Yamaguchi

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)819-830
Number of pages12
JournalMarine Mammal Science
Volume22
Issue number4
DOIs
Publication statusPublished - 2006 Oct 1

Keywords

  • Common dolphin
  • Corpora albicantia
  • Delphinus delphis
  • Elastin
  • Histochemisrty
  • Ovary

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science

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