Although the histology of the intestinal tract of Crocodylus niloticus is touched on in overall studies on reptilian intestinal tract, a more comprehensive light microscopical study on this area is lacking. Specimens for histological examination were taken from the duodenum, the jejunum, the ileum and the rectum. The data obtained revealed that the mucosa is thrown into folds and simple, slight...

The following four species (only females available) of the Philometridae (Nematoda: Dracunculoidea) were recorded from freshwater fishes of Lake Turkana, northwestern Kenya in 2007-2008: Philometra bagri (Khalil, 1965) from the subcutaneous tissue around the mouth, on gill covers and the fin base of the bayad Bagrus bajad (Forsskål) (Bagridae: Siluriformes), Philometra lati sp. n. from the abdo...

Evidence supports that sex determination (SD) in tilapia is controlled by major genetic factors that may interact with minor genetic as well as environmental factors, thus implying that SD should be analyzed as a quantitative trait. Quantitative trait loci (QTL) for SD in Oreochromis niloticus were previously detected on linkage groups (LG) 1 and 23. Twenty-one short single repeats (SSR) of >12...

Pemanfaatan perikanan secara lestari sangat diperlukan agar sumberdaya yang ada saat ini bisa terus dimanfaatkan dan juga dalam rangka pemulihan stok telah rusak. Ikan nila (Oreochromis niloticus) ikan mujair mossambicus) luas dikenal sebagai salah satu spesies air tawar penting budidaya. Penelitian dilakukan dengan tujuan identifikasi Oreochromis spp. dari perairan daratan Merauke menggunakan ...

Large Pleistocene reptile tracks and traces were described from the Cape south coast of South Africa in 2020, including ‘probable swim traces’. These trace fossils found on loose slabs blocks Klein Brak Formation. Subsequently, another surface has become exposed this coastline, also a slab. It exhibits more definitive evidence epirelief, probably made by Nile crocodile (Crocodylus niloticus) or...

The Nile tilapia (Oreochromis niloticus) is an important species in aquaculture and an excellent model system for laboratory studies. Functional genetic analysis using this species has been difficult because existing methods for producing transgenics are inefficient. Here we show that the Tol2 transposon system can be used to create transgenic tilapia with high efficiency. We constructed a line...

In this study, 119 bacterial strains were isolated from various samples such as healthy tilapia fish (Oreochromis niloticus), water and sediment around the culture fish-cages, and several kinds of traditional fermented foods. These bacterial isolates were screened for antibacterial activities against bacterial fish pathogens i.e. Aeromonas hydrophila, A. caviae and Streptococcus agalactiae usin...

Effects of Dietary Nucleotides on Growth, Immunology, and Disease Resistance of Juvenile Nile Tilapia (Oreochromis niloticus). (December 2011) Maritza Anguiano, B.S., Texas A&M University Co-Chairs of Advisory Committee: Dr. Delbert Gatlin Dr. Alejandro Buentello In order to improve production efficiency and profitability in tilapia aquaculture, further research is needed to develop methods to ...

In an earlier study Oreochromis niloticus fingerlings (initial weight, 4.31±0.27 g) were fed diets with dietary protein levels, ranging from 7.30% 44.24% dry matter (dm) for eight weeks. Using growth performance and food conversion ratio, the dietary protein requirement of the fingerlings was estimated at 33.32% dietary protein (dm). In this study the dietary essential amino acid requirements f...

There is considerable controversy with regard to the genotoxicity of glyphosate, with some reports stating that this compound is non-toxic for fish, birds and mammals. In this work, we used the comet assay to examine the genotoxicity of glyphosate isopropylamine (0.7, 7, 70 and 700 μM) in human lymphocytes, erythrocytes of Oreochromis niloticus and staminal nuclei of Tradescantia (4430) in vitr...