Metastenasellus Powelli Sp. N., a New Stenasellid Isopod Crustacean From Littoral Groundwaters of Southeastern Nigeria

Crustaceana ◽  
1979 ◽  
Vol 37 (3) ◽  
pp. 265-276 ◽  
Author(s):  
Guy Magniez
Keyword(s):  
Southeastern Nigeria ◽  
Port Harcourt ◽  
Eaux Souterraines

AbstractContrairement à tous les autres Sténasellides, qui vivent dans les eaux souterraines continentales (grottes, nappes phréatiques, sources thermales), la nouvelle espèce a été trouvée dans la zone oligohaline du littoral, près de Port Harcourt, Nigéria. Description de Metastenasellus powelli sp. n. affinités de cette nouvelle espèce, aire géographique et diagnose rénovée du genre Metastenasellus Magniez, 1966, liste des espèces connues à ce jour.

scholarly journals Thrips (Thysanoptera) of vegetable crops (okro, spinach, garden egg and pumpkin) grown in Southeastern Nigeria

2011 ◽  
Vol 39 (No. 4) ◽  
pp. 132-138 ◽  
Author(s):  
E.T. Oparaocha ◽  
R.N. Okigbo
Keyword(s):  
Lower Number ◽  
Frequency Of Occurrence ◽  
Vegetable Crops ◽  
Southeastern Nigeria ◽  
Amaranthus Hybridus ◽  
Solanum Incanum ◽  
Telfairia Occidentalis ◽  
Port Harcourt ◽  
Microscopic Studies ◽  
Hibiscus Esculentus

Eight vegetable crops were sampled at five localities in Southeastern Nigeria and were found to harbour one or more species of thrips. The crops were Amaranthus hybridus, A. spinosus, Basella rubra, Solanum incanum, S. melongena, Hibiscus esculentus, Telfairia occidentalis and a species of Solanum. The sampled localities, with the frequency of occurrence of thrips, were Umuahia (29.6%), Owerri (28.5%), Port Harcourt (25.7%), Calabar (18.7%) and Enugu (6.0%). The studies revealed that crops with very heavy infloresences, e.g. Amaranthus hybridus, had a higher number of thrips (40%) per flower/leaf, while simple flowered crops like Telfairia occidentalis could only harbour a far lower number of thrips per flower/leaf. This showed a preference of these thrips for plants with heavy inflorescences which provided them with more protection, especially their larvae. Taxonomic/microscopic studies identified three species of thrips: Haplothrips gowdeyi that attacked 63% of all the sampled crops, Frankliniella schultzei was hosted by 50% of the crops, and Megalurothrips ventralis also preyed on 50% of the plant samples.  

scholarly journals PRELIMINARY OBSERVATIONS ON THE SEMINAL CHARACTERISTICS OF RABBITS RAISED IN TWO LOCATIONS IN SOUTHEASTERN NIGERIA.

2021 ◽  
Vol 22 (2) ◽  
pp. 108-112
Author(s):  
U. Herbert ◽  
C. O. Acha
Keyword(s):  
Sperm Motility ◽  
Semen Quality ◽  
Sperm Concentration ◽  
Southeastern Nigeria ◽  
Abnormal Sperm ◽  
Port Harcourt ◽  
Semen Volume ◽  
Live Sperm ◽  
Artificial Vagina ◽  
Time Of Collection

A total of sixteen rabbits sourced from two locations in Southeastern Nigeria were used for this study. Semen was collected from all the rabbits twice weekly for eight weeks using an artificial vagina while observation on the effect of time of collection on semen quality were also made. The results obtained indicated that time of collection had no significant effect (P > 0.05) on all the seminal characteristics measured. However, source of the animals showed significant effect (P < 0.05) on semen volume, sperm concentration, total sperm per ejaculate and proportion of abnormal sperm. Average semen volume, sperm concentration and total sperm per ejaculate were: 0.69±0.007 ml, 104.0±1.44 x 106/m1 and 71.40±0.90x106 respectively for the rabbits sourced from Port Harcourt. The corresponding values for rabbits sourced from Owerri were: 0.66±0.008m1, 96.02 ±1.63x106iml and 63.49±1.50 x 106 respectively. Abnormal sperm proportions were 11.05±0.22% and 1216 ± 032% for the rabbits sourced from Port Harcourt and Owerri respectively. There were no significant (P> 0.05) differences observed between locations in live sperm concentration and sperm motility. Live sperm concentration and sperm motility were 87.75±1.09% and 71.62±0.74% for the Port Harcourt group, while the values obtained for the Owerri group were 88.06±034% and 71.19±0.89% respectively.  

scholarly journals Precipitation Chemistry and Occurrence of Acid Rain over the Oil-Producing Niger Delta Region of Nigeria

2010 ◽  
Vol 10 ◽  
pp. 528-534 ◽  
Author(s):  
John Kanayo Chukwu Nduka ◽  
Orish Ebere Orisakwe
Keyword(s):  
Crude Oil ◽  
Niger Delta ◽  
Rainy Season ◽  
Tall Buildings ◽  
Delta Region ◽  
Southeastern Nigeria ◽  
Niger Delta Region ◽  
June July August ◽  
Port Harcourt ◽  
June July

This study investigated the nitrate, sulfate, total dissolved solid (TDS), electrical conductivity, total hardness (TH), and bicarbonates of rainwater samples collected from Warri and Port Harcourt between April–June, July–August, and September–October of 2005 and 2006 to depict onset of rainy season, mid-rainy season, and end of rainy season for the two major crude oil–producing cities of the Niger Delta region of Nigeria (although Port Harcourt is also noted for non-oil manufacturing industries). The same was done in Awka, a non-oil producing city in the hinterland of southeastern Nigeria. In each of the cities, rain samples were collected from three points in a triangular equilibrium using a clean plastic basin fastened to a table 2 m above ground level and 115 m away from tall buildings and trees. The parameters were determined after filtering, using their respective standard methods. Averages of 1.50, 1.81, 1.13 and 2.14, 1.50, 1.86 mg/l of nitrate for April–June, July–August, and September–October were recorded for Warri in 2005 and 2006, respectively. While 15.21, 3.23, 22.31 and 20.89, 9.96, and 14.27 mg/l were recorded in Port Harcourt. Sulfate levels for Warri and Port Harcourt for the same periods are follows: 1.38, 1.88, 1.06, 1.50, 1.43, 1.50 and 2.64, 1.15, 5.88, 4.73, 1.90, 1.55 mg/l, respectively. Nitrate levels were higher than sulfate. Other parameters include TDS (5.44, 4.79, 3.30 and 7.63, 3.69, 2.56 mg/l for Warri in 2005 and 2006; 12.57, 2.07, 25.214 and 28.87, 6.73, 7.80 mg/l for Port Harcourt for the same periods). Other parameters also varied in that order for the 2 years in same cities. Crude oil exploration and gas flaring in the Niger Delta, and multiplicity of cottage industries in Awka, impacted on the inorganic ion pollution of the rainwater. This may have public health implications in the region.

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