A comparative analysis of Passive Integrated Transponder (PIT) tagging in selective breeding programme of improved rohu (Jayanti) and catla

Abstract

Passive Integrated Transponder (PIT) tags have been popularly used in identification of individual fish, stock, full-sib and half-sib families, year class and generations in aquaculture selective breeding programs. This study has been conducted on genetically improved Indian Major Carps (IMCs), improved rohu (Jayanti) and improved catla to compare PIT tagging of different size taggable fingerlings with respect to post tagging survival and tag retention. Six groups of improved rohu (Jayanti) and improved catla fingerlings with weight ranging from 10 to 150 g were tagged with PIT tags and mortality was recorded after 24 h. The overall mortality was thus found to be 3 % and 15 % in rohu and catla respectively. In rohu, 3 % mortality was observed after tagging in both small size fish ( 20 g) with no significant difference whereas in catla, mortality in small size fish ( 20 g) (p 0.05), whereas in catla the correlation of length, weight and tagging space on mortality % was − 0.508, − 0.510, − 0.500 respectively and significant (p 0.05). This study also revealed more sensitivity of the Indian major carp Labeo catla (Catla) to PIT tagging in comparison to Labeo rohita (rohu) and demonstrates the ideal size for PIT tagging in catla to be 20–30 g.

Keywords

• PIT tag
• Jayanti rohu
• Improved catla
• Fingerlings
• Tagging space
• Serum cortisol