A note on the possibility of identifying Leydig and Sertoli cells by immunohistochemistry in bowhead whales (Balaena mysticetus)

Leydig cells have been found to be either unidentifiable or at apparent low numbers during routine histologic examination of bowhead whale testes. Therefore, formalin-fixed, paraffin-embedded testicular tissues from 14 whales were retrospectively examined determine if immunohistochemical staining could aid in identification Sertoli and cells. Multiple intratesticular samples when available. differentiated using inhibin calretinin stains. Significant length seasonal differences not found; however, a trend toward increased intensity was noted for autumn harvested whales.