| dc.contributor.author | Hyder, Mohamed | |
| dc.date.accessioned | 2014-07-15T13:27:38Z | |
| dc.date.available | 2014-07-15T13:27:38Z | |
| dc.date.issued | 1969-04 | |
| dc.identifier.citation | Hyder, Mohamed (1969). Histological Studies on the Testis of Tilapia leucosticta and Other Species of the Genus Tilapia (Pisces: Teleostei).Transactions of the American Microscopic, 88 (2), PP.122-231 | en_US |
| dc.identifier.uri | http://www.jstor.org/stable/3224494 | |
| dc.identifier.uri | http://hdl.handle.net/11295/73054 | |
| dc.description.abstract | ABSTRACT: Histological studies carried out on specimens of the cichlid fishes T.
leucosticta, T. nigra, and T. zillii collected in the East African Rift Valley crater lake,
Lake Naivasha reveal that various
stages of sexual maturity are encountered at all
times of the
year. Spermatogenesis which appears identical in the three species as well
as in the West African species, T. macrocephala, is described in detail. A method for
estimating the testicular maturity from the mean lobular estimation is proposed par-
ticularly for those fishes that are continuous breeders. The interstitial tissue in Tilapia
is localized in two places, peripherally and in the
typical higher vertebrate interlobular
position. The latter appears to have a cycle of proliferation and breakdown reaching
a peak at just before the maximum
spermatozoan density. There is a close correlation
between the activity of the peripheral interstitium and the
spermatogenetic activity
and it is suggested that the peripheral interstitium exerts a
spermatokinetic effect on
post-spermatogonial proliferation. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | University of Nairobi | en_US |
| dc.title | Histological Studies On The Testis Of Tilapia Leucosticta And Other Species Of The Genus Tilapia (pisces: Teleoste)1 | en_US |
| dc.type.material | en_US | en_US |
