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Impact of Stocking Density on the Polyculture of C/arias gariepinus and Oreochromis niloticus

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Journal of Agricultural Science and Technology(A) 2012年第8期2卷 1018-1023页

作者： olele Nkeonyeasua Florence Tighiri Onome Harrison Fisheries Department Delta State University P.M.B. 95074 Asaba Campus Nigeria

Replacement of Fish Meal with Graded Levels of Earthworm Meal in the Diet of Fingerlings： Effect on Feed and Growth Parameters

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Journal of Agricultural Science and Technology(A) 2012年第7期2卷 901-908页

作者： Nkeonyeasua Florence olele Josiah Chidiebere Okonkwo Department of Fisheries Delta State University Asaba Campus Asaba Delta State Nigeria Department of Animal Science and Technology Nnamdi Azikiwe University Awka Anambra State Nigeria

The study was aimed at evaluating growth response of Heteroclarias fingerlings fed diet in which fish meal was substituted with graded levels of earthworm meal. The replacement levels were 0.00%, 25%, 50%, 75% and 100% designated as E0, E25, E50, E75 and E100, respectively. Fingerlings used for the work were obtained through artificial insemination of brood stock (purchased from local farmers) with ovaprim in the laboratory. The resulting fry were reared and fed with cultured plankton for 2 weeks followed by 100% fish meal for another two weeks. Thereafter sixteen fingerlings weighing 4.73 g and measuring 6.512 mm standard length (on the average) were starved over night and reared in five indoors tanks (0.8 × 0.5 × 0.5 m) in duplicate for eight weeks. Fingerlings were fed on graded earthworm meals of 40% protein twice daily at 08:00 and 16:00. The highest mean weight (6.77 g), specific growth rate (0.86) and protein efficiency ratio (0.6) were obtained at 50% replacement level. Also, Food conversion ratio was the highest at 50% substitution level and lowest at 0.00% substitution, indicating that fingerlings use earthworm containing meal more efficiently. Furthermore, cost benefit analysis revealed that the profit index for 50% inclusion of earthworm meal was the highest (1.71) and the highest net profit of N374.32 (circa $2.3) was achieved at this level. Water quality parameters observed were within tolerable values for the fingerlings well being. Consequently, farmers are advised to use 50% earthworm meal in place of fish meal for formulation of Heteroclarias fingerlings diet. This will drastically reduce production cost, increase farmers profit and enhance the biological value of our menu.

关键词：水质参数鱼粉饲料蚯蚓粉鱼种生长参数蛋白质效率比成本效益分析鱼苗饲养

Ocular Manifestations Encountered in Albinos Living in Libreville: Epidemiological and Clinical Aspects

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Open Journal of Ophthalmology 2019年第4期9卷 203-213页

作者： Prudence Ada Assoumou Andy Viola Dohvoma Steve Mvogo Ebana Tatiana Mba Aki olele Ossavou Assomo Emmanuel Mve Mengome Come Ebana Mvogo Department of Ophthalmology Faculty of MedicineUniversity of Health and ScienceLibrevilleGabon Ophthalmology Department of Agondje University Hospital Center LibrevilleGabon Faculty of Medicine and Biomedical Sciences University of Yaounde IYaoundeCameroon Omar Bongo Ondimba Army Instructions Hospital LibrevilleGabon

Introduction: Albinism is a rare hereditary genetic disorder, characterized by melanogenesis disorders associated to varying degrees of cutaneous, atrial and visual disorders. In Libreville, no data on the subject is available. Purpose: To describe the ocular manifestations found in albinos living in Libreville. Patients and methods: This was a cross-sectional and descriptive study that took place in Libreville during a year from and that concerned 43 albinos. The inclusion criteria were any albino with oculocutaneous albinism present in Libreville who has agreed to participate in the investigation. The variables studied were age, sex, visual acuity, ametropia, iris color, iris transillumination, strabismus, nystagmus, torticollis, amblyopia, optic disc, photophobia, foveal hypoplasia and retinal hypopigmentation. Data was collected and analyzed using Epi infoTM 7.***.0.1 CDC and?IBM®?SPSS®?V21 Statistic software. Results: The mean age was 21.2 ± 17 years with a (F/M) ratio of 0.53. Visual acuity by far without correction (AVLCSC) < 3/10 was found in 88.4% of cases. Astigmatism, two-tone iris and torticollis were found respectively in 52.7%, 51% and 26% of cases. Retinal hypopigmentation and foveal hypoplasia were noted in 65.1% and 86% of cases. Divergent strabismus was noted in 71.4% and small and pale papilla in 95.1% of cases. Photophobia, iris transillumination, nystagmus and amblyopia were noted in 100% of cases. Conclusion: The ocular manifestations encountered in our series are similar to those described in literatures.

关键词： Albinism Nystagmus Strabismus Amblyopia Torticollis Photophobia Li-breville

Chemical Compostion of Earthen Pond Feed from Spring Water, in Asaba Campus, Asaba, Delta State, Nigeria

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Journal of Agricultural Science and Technology(B) 2013年第1期3卷 56-61页

作者： olele Nkeonyeasua Florence Nwabueze Arimiche Agatha Ekelemu Jerimoth Kesiana Department of Fisheries Delta State University Asaba Campus PMB 95074 Delta State Nigeria

Sound pond productivity accompanied with adequate fish health is maintained, when water quality parameters are conducive. The study evaluated the chemical composition of a pond feed from spring water, in Asaba Campus. Sampling was carried out from September 2011 to February 2012 on a monthly basis. Surface water samples were collected between the hours of 7:00-9:00 am from the pond on each sampling day. Hydrogen-ion-concentration was in the range of 6.5 to 8.0 units. Dissolved oxygen was the highest in February 2012 with a value of 11.0 mg/L while it was the lowest in December 2011 with a value of 9.0 mg/L. Biological oxygen demand ranged from 3.5 to 5.0 mg/L. The chemical oxygen demand was the highest in December (10.00 mg/L) and lowest between January and February (8.0mg/L). The highest alkalinity was observed in October with a value of 1.05 mg/L and lowest in December with a value of 0.042 mg/L. Conductivity values ranged from 0.075 to 0.12 μS/cm. Total phosphorus was the highest in October with a value of 1.01 mg/L and lowest in December with a value of 0.83 mg/L. Total dissolved solids ranged from 90 to 105 mg/L. Values of physco-chemical parameters revealed that the pond was not polluted. Water quality analysis of the aquatics is of economic advantage to the fish farmer, hence, the need for its assessment at regular intervals. This is a quality assurance process that assures early dictation of toxic substances and mitigation processes to adopt before problems arise. In this way, the good health of organisms in the aquatic ecosystem and those of human dependent on them are guaranteed.

关键词：化学成分尼日利亚泉水校区饲料三角洲成份土池