Scientific Journal of Biological Sciences
EISSN : 2322-1968
Published by: Academic World Research (10.14196)
Total articles ≅ 6
Articles in this journal
Published: 30 March 2018
Scientific Journal of Biological Sciences pp 247-252; https://doi.org/10.14196/sjbs.v7i3.2590
Published: 30 January 2018
Scientific Journal of Biological Sciences, Volume 7, pp 242-246; https://doi.org/10.14196/sjbs.v7i1.2570
The application of microalgae in various industries like feed, food, cosmetic and pharmaceutical has accentuated the necessity of their isolation from the nature. In some cases, experimental verifications are halted because of using inappropriate sampling or isolation methods. These limitations can be conquered by choosing more practical approaches. This study would assist the selection of more utilitarian isolation and sampling techniques in the base of sample types.
Published: 18 November 2017
Scientific Journal of Biological Sciences, Volume 6, pp 237-241; https://doi.org/10.14196/sjbs.v6i11.2510
Yield data of 12 black cumin (Nigellasativa L.) cultivars tested across 9 rain-fed environments during the 2013-2015 growing season using RCBD in 3 replications. The AMMI analysis tested in nine environments (years) were showed that the yield was significantly affected (P<0.001) by genotypes and environment main effects. But non significant for GxE interaction. The model revealed that differences between the environments accounted for about 90% of the treatment sum of squares. The genotypes and the GxE interaction also accounted significantly for 4% and 6% respectively of the treatment SS. The first principal component axis (PCA 1) of the interaction captured 51.32% of the interaction sum of squares. Similarly, the second principal component axis (PCA2) explained a further 18.20% of the GEI sum of squares. The mean squares for the PCA 1 and PCA 2 were significant at P=0.01 and cumulatively contributed to 69.52% of the GxE interaction SS, leaving 30.37% of the variation in the GxE interaction in the residual. The AMMI and AMMI stability value (ASV) identified G10 as the most stable and high yielding genotype.
Published: 21 September 2017
Scientific Journal of Biological Sciences, Volume 6, pp 229-236; https://doi.org/10.14196/sjbs.v6i9.2494
The mandibular alveolar nerve at the point of entry at the mandibular foremen was anatomically determined in bovine in order to distinguish the capability to reach the nerve via the oral cavity. The mandibular nerve provided sensation to the check teeth, tongue and mandible. Desensitization of the mandibular alveolar nerve enables surgeons to perform effectively and safely in these structures. Extra and intraoral approaches of the mandibular alveolar nerve block are well recognized in human and horses. An intraoral approach to the mandibular alveolar nerve in bovine was presented in the present study based on the anatomical findings. It is hypothesized that the approach was reliable, applicable and safer than the extraoral method.
Published: 17 July 2017
Scientific Journal of Biological Sciences, Volume 6, pp 222-228; https://doi.org/10.14196/sjbs.v6i7.2456
The objective of this research was to establish the ecological succession of the planktonic groups developed in a biofloc system for the cultivation of tilapia. For this purpose, 20 fish of 7±2 cm long and an average weight of 8.6 g were introduced in 200 liters’ cylinders. Every day they were fed commercial food with 40% protein. The diet was calculated considering 10% of the body mass and molasses was added to promote the development of heterotrophic bacteria maintaining a C/N ratio of 15:1. Diversity and abundance of the organisms associated with the bioflocs was analyzed during 10 weeks by direct observation under an optical microscope (Olympus CBX50) connected to an image processing software. At the same time, physicochemical parameters (pH, nitrite, nitrates and ammonium) were measured using a HANNA Aquaculture Photometer auto analyzer (HI83203). Results showed a marked succession of planktonic organisms as the system matured, with the occurrence of facilitation, tolerance and inhibition mechanisms among the groups. Chlorophytes and cyanobacteria were among the facilitator species responsible for the transformation of nitrogen compounds into assimilable forms available for the development of other organisms with more complex structures, so that -throughout the experiment- ciliates and other protozoa appeared quickly, but with variations both in diversity and abundance among the groups. Later on, rotifers, one of the most conspicuous groups, increased represented by the genera Lepadella, Phillodina, Lecane and Habrotrocha. The last group to appear was that of nematodes (sixth week), which indicates that the system was already mature by providing sufficient carbohydrates for the formation of the collagen structures of this group.
Published: 16 May 2017
Scientific Journal of Biological Sciences, Volume 6, pp 214-221; https://doi.org/10.14196/sjbs.v6i5.2402
This study was carried out to investigate the development of the brain in the grey breasted helmeted guinea fowl in Nigeria. Domestication of this species of bird is in an increase, but scanty documentation on the development of cerebrum and how it relates to the neurobiology of this bird is lacking. A total of seventy four (74) fertilized grey breasted helmeted guinea fowl eggs purchased from National Veterinary Research Institute (NVRI) Vom, Jos, Plateau State, Nigeria and other local breeders within Jos and its environs were used for this study. Grossly,the cerebrum of the helmeted guinea fowl appeared first on day 4 of incubation and was lissencephalic throughout the incubation period. The mean weight of the cerebrum was established to be 0.010 ± 0.003 g on day 5 pre-hatch. The weights progresses steadily but weighed less than 3.0 g on day 28 prior to hatching. At day 5 of incubation, there were numerous neuroblast migrating from the neuroepithelium of the lateral ventricles. Blood vessel was the first organ to be formed. The cerebrum was first observed to appear on day 4 of incubation. The cerebrum was fully formed void of olfactory lobe at pre-hatch period.
Published: 24 March 2017
Scientific Journal of Biological Sciences, Volume 6, pp 206-213; https://doi.org/10.14196/sjbs.v6i3.2429
Testes of 406 males little tunny (Euthynnus alletteratus), collected over a year period from an artisanal commercial fishery, were used to morphologically and histologically assess patterns of the reproductive biology in this small tuna. Most of the specimens examined ranged in size from 35 to 82 cm FL (centimetre fork length). Observation of slides under a light microscope revealed that males investigated have lobular testicular structure. These lobules arrange in a branching system of tubules. Tubules join side by side to one another and yet inter-tubular-spaces separate them. Gametes’ developmental stages occur within such a structure. Histological characteristics were consistent with the description of the six-maturity stages of males little tunny determined on the basis of the macroscopic observation.