Tag Archives | Fishes

Gastrulation and Primary Organ Formation in Fishes | Embryology

In this article we will discuss about the gastrulation and the formation of primary organ rudiments in fishes. In fishes the yolk formed in the oocytes during oogenesis initially does not differ substantially from the yolk in amphibian oocytes and eggs. It consists of yolk platelets lying in the cytoplasm and intermingled with other cytoplasmic components (mitochon­dria and the like). [...]

By |2018-04-30T10:44:14+00:00April 30, 2018|Gastrulation|Comments Off on Gastrulation and Primary Organ Formation in Fishes | Embryology

Gastrulation and Primary Organ Formation in Fishes | Embryology

In this article we will discuss about the gastrulation and formation of primary organ rudiments in fishes. In fishes the yolk formed in the oocytes during oogenesis initially does not differ substantially from the yolk in amphibian oocytes and eggs. It consists of yolk platelets lying in the cytoplasm and intermingled with other cytoplasmic components (mitochon­dria and the like). The [...]

By |2018-04-30T10:44:13+00:00April 30, 2018|Gastrulation|Comments Off on Gastrulation and Primary Organ Formation in Fishes | Embryology

Osmoregulation in Various Kinds of Fishes | Zoology

In this article we will discuss about osmoregulation in various kinds of fishes. According to habitat, fishes can be distin­guished as (i) Marine, and (ii) Fresh water. (i) The marine fishes fall into two dis­tinct groups, (a) Those whose osmotic con­centration is the same as or slightly above sea water, e.g., hagfish, elasmobranchs, Latimeria etc. This group has no major [...]

By |2017-01-11T14:47:41+00:00January 11, 2017|Fish|Comments Off on Osmoregulation in Various Kinds of Fishes | Zoology