title: Determination of the elongate spermatid-Sertoli cell ratio in various mammals.
abstract: Criteria were devised for determining the elongate spermatid-Sertoli cell ratio in various mammalian species at the electron microscope level. When data from particular species were pooled, the values were: rabbit, 12.17:1, hamster, 10.75:1; gerbil, 10.64:1; rat, 10.32:1; guinea-pig, 10.10:1; vole, 9.75:1; and monkey, 5.94:1. The elongate spermatid-Sertoli cell ratio is a measure of the workload of the Sertoli cell and is a prime factor determining their efficiency. The higher the ratio, the higher the sperm output is likely to be per given weight of seminiferous tubule parenchyma for a particular species.
mesh_terms: D000818:Animals; D003411:Arvicolinae / Q000033:anatomy & histology; D006224:Cricetinae; D005849:Gerbillinae / Q000033:anatomy & histology; D006168:Guinea Pigs / Q000033:anatomy & histology; D008252:Macaca fascicularis / Q000033:anatomy & histology; D008297:Male; D008322:Mammals / Q000033:anatomy & histology*; D008647:Mesocricetus / Q000033:anatomy & histology; D051379:Mice / Q000033:anatomy & histology; D008854:Microscopy, Electron; D009893:Opossums / Q000033:anatomy & histology; D011817:Rabbits / Q000033:anatomy & histology; D051381:Rats; D011919:Rats, Inbred Strains / Q000033:anatomy & histology; D012708:Sertoli Cells / Q000648:ultrastructure*; D013076:Sperm Count; D013087:Spermatids / Q000648:ultrastructure*; D013094:Spermatozoa / Q000648:ultrastructure*