2021. SPERM PRODUCTION RATES OF EUROPEAN BOARS RAISED AND MAINTAINED IN THE HUMID TROPICS WITH A NOTE ON SORBITOL DEHYDROGENASE ACTIVITY AS AN INDEX OF SPERMATOGENESIS . Nigerian Journal of Animal Production. 4, 2 (Jan. 2021), 59–64. DOI:https://doi.org/10.51791/njap.v4i2.2294.