Browsing by Author "Oke, O. A."

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Effects of melatonin on intestinal fluid absorption in the domestic chicken (gallus domesticus)
(Biomedical Communications Group, Ibadan, Nigeria, 2000) Sanni, A. A.; Oke, O. A.; Saba, A. B.; Ola-Davies, O. E.; Durotoye, L. A.
Establishment of the moth: niphograpta albiguttalis (warner) (lepidoptera: pyralidae), a biological control agent of water hyacinth (eichhornia crassipes) in waterways of Lagos and Ogun states, southwestern Nigeria
(Routledge, 2012-06) Oke, O. A.; Adelaja, B. A.; Emuh, C. N.; Taiwo, O. J.
The moth Niphograpta albiguttalis was found infesting water hyacinth on waterways in Nigeria in 2009 in the areas of Badagry, Ejirin and Epe in Lagos State and Iwopin in Ogun State. This moth has not been released in Nigeria but it was released as a biological control agent for water hyacinth in Ghana in 1996 and in Benin in 1993. It is not reported to have established in those countries, but it would appear that as a result of those releases N. albiguttalis is now present in Nigeria. The larval instars found were damaging only water hyacinth with bulbous petioles. The larval developmental periods ranged between 10 and 15 days (n = 3).
Morphological changes in sperm cells during epididymal transit in West African dwarf buck
(2000) Oyeyemi, M. O.; Ola-Davies, O. E.; Oke, O. A.; Idehen, C. O.
The spermatozoa characteristics during epididymal transit were studied .in healthy West African dwarf (WAD) goat bucks. The caput epididymis had a value of 27.0% of abnormal sperm cell, which is significantly different (P<0.05) from the 21.0% of corpus and 23.0% of the cauda epididymis. There was no significant difference (P>0.05) between the values of corpus and caudal epididymis. The caput epididymis also had 6.0% spermatozoa with proximal cytoplasmic droplets which differed significantly (P<0.05) from that of the corpus (1.20%) and the cauda (0.9%), The values for coiled tails and tire total abnormal sperm cells showed that caput epididymis had higher abnormal spermatozoa, which was closely followed by cauda while the corpus epididymis had the least. There were more spermatozoa with looped tails in the cauda epididymis (1.68%) than in other segment (corpus: 0.95% and caput: 0.80%). The testicular and epididymal parameters were positively correlated (weight of testis and epididymis; weight of testis, scrotal circumference, testicular circumference, weight of epididymis and weight of testis (r = >0.05) except the correlation values between length of epididymis and length of tests (r = 0.30).