The following points highlight the six main types of migration in fishes. The types are: 1. Latitudinal Migration 2. Vertical Migration 3. Spawning Migration 4. Feeding Migration 5. Overwintering Migration 6. Shoreward Migration. Type # 1. Latitudinal Migration: This is performed by fishes like barracudas (Sphyraena) and swordfish (Xiphius) of the warm tropical seas. They migrate to north in spring [...]
In this article we will discuss about Palaemon Malcolmsonii:- 1. Habit and Habitat of Palaemon Malcolmsonii 2. External Features of Palaemon Malcolmsonii 3. Appendages 4. Body Wall 5. Muscular System 6. Endophragmal Skeleton 7. Digestive System 8. Respiratory System 9. Blood Vascular System 10. Reproductive System 11. Fertilisation and Development 12. Endocrine System. Contents: Habit and Habitat of Palaemon Malcolmsonii [...]
In this article we will discuss about the reproductive system of cockroach. Male Reproductive Organs of Cockroach: The male reproductive system of cockroach consists of a pair of testes, vasa deferentia, an ejaculatory duct, utricular gland, phallic gland and the external genitalia. (i) Testes: There is a pair of three-lobed testes lying dorsolaterally in the 4th and 5th abdominal segments, [...]