*Department of Zoology, Faculty of Science, Al-Azhar University, Cairo, Egypt.
Studies on scale regeneration in the Common goby, Pomatoschistus microps (Pisces)
Article first published online: 20 AUG 2009
Journal of Zoology
Volume 189, Issue 4, pages 503–522, December 1979
How to Cite
Fouda, M. M. (1979), Studies on scale regeneration in the Common goby, Pomatoschistus microps (Pisces). Journal of Zoology, 189: 503–522. doi: 10.1111/j.1469-7998.1979.tb03977.x
- Issue published online: 20 AUG 2009
- Article first published online: 20 AUG 2009
- Accepted 10 April 1979
The longevity of original scales and the process and consequences of scale regeneration in the euryhaline Common goby, Pomatoschistus microps (Kroyer), has been studied by monthly sampling of two populations. Scale regeneration comprises four stages: formation of a new growth centre, a regenerated area in the form of a wide central irregular area lacking concentric circuli: formation of short and widely spaced circuli at the outermost region of the regenerated area: a check in regenerated scale growth on reaching the size of the original scales: and the commencement of normal growth similar to that of the surrounding original scales. Growth of regenerated scales within 30 days was not sufficient to attain the same size of the original ones. The average percentage of regenerated scales in successive months during the life span of P. microps is about 20% in immature fish and sharply increases up to about 60% of the total scales during the breeding season. The correlation between sharp increases in regenerated scales and the breeding season is also confirmed on examining scales from two other gobioid species, Gobius paganellus and Gobius cobitis. It is suggested that the loss of a large number of scales may result in the check in body growth during the breeding season.