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3.3. Fish Pituitary gland
Unit 3 - Breeding of major carps
- Pituitary gland is an endocrine (ductless) gland situated on the ventral side of the brain.
- It is a small, soft, whitish body whose size and shape vary with species.
- It is more or less round in carps; oval in catla and rohu and pear-shaped in mrigal.
- The pituitary is located in a concave cavity known as Sella turcica and enclosed by a thin membrane known as duramater.
- It may be attached to the brain by a short stalk called the Infundibular stalk.
Types of pituitary glands
Based on the presence or absence of the stalk, the pituitary is classified into
- Leptobasic pituitary (with stalk)– eg. Carps and catfishes
- Platybasic pituitary (without stalk)– eg. Murrels and glassfish (Ambasis species)
The teleost pituitary comprises of two parts-
- The glandular part (the adenohypophysis)
-
The nervous part (the neurohypophysis)
Last modified: Thursday, 9 June 2011, 9:09 AM