نتایج جستجو برای: lake victoria
تعداد نتایج: 51390 فیلتر نتایج به سال:
Oogenesis begins when the stem cell (oogonium) transforms into leptotene oocytes at the initiation of meiosis. The cell now called an oocyte produces the cellular material needed to complete the pre-vitellogenic phase of development. These may include gene amplification and organelle production. In addition, this leads to the accumulation of nutrients, messenger RNAs (mRNA), precursors of DNA a...
Oogenesis begins when the stem cell (oogonium) transforms into leptotene oocytes at the initiation of meiosis. The cell now called an oocyte produces the cellular material needed to complete the pre-vitellogenic phase of development. These may include gene amplification and organelle production. In addition, this leads to the accumulation of nutrients, messenger RNAs (mRNA), precursors of DNA a...
Lake Victoria cichlid fishes are excellent examples of explosive adaptive radiation. Although Lake Victoria cichlids are believed to have arisen during a short period (approximately 14,000 years), they have various species-specific phenotypes. One important phenotype that distinguishes each species is the shape of the jaw, which has diverged to adapt to the wide variety of trophic habitats pres...
The factors that determine parasite assemblages among the clariid fishes of Lake Victoria, Tanzania were studied between August 2003 and February 2005. Six hundred and fifty-six fish belonging to seven species were necropsied and examined for parasites, from which 31 species of metazoan parasites were recorded. The community was dominated by the nematodes both in species and numbers. Most speci...
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