STUDY OF EXTERNAL SEXUAL CHARACTERISTICS AND GONADO‑ SOMATIC INDEX FOR DETERMINING THE BREEDING SEASON OF ANABAS TESTUDINEUS
SAMARENDRA BEHERA *
DEPARTMENT OF FISHERIES RESOURCE MANAGEMENT FACULTY OF FISHERY SCIENCES. WEST BENGAL UNIVERSITY OF ANIMAL AND FISHERY SCIENCES, 5. BUDHERHAT ROAD, CFIAKGARIA, P.O. PANCHASAYAR, KOLKATA - 700 094, INDIA
LAISHRAM MONLISA DEVI *
DEPARTMENT OF FISHERIES RESOURCE MANAGEMENT FACULTY OF FISHERY SCIENCES. WEST BENGAL UNIVERSITY OF ANIMAL AND FISHERY SCIENCES, 5. BUDHERHAT ROAD, CFIAKGARIA, P.O. PANCHASAYAR, KOLKATA - 700 094, INDIA
SANJEEV KUMAR *
DEPARTMENT OF FISHERIES RESOURCE MANAGEMENT FACULTY OF FISHERY SCIENCES. WEST BENGAL UNIVERSITY OF ANIMAL AND FISHERY SCIENCES, 5. BUDHERHAT ROAD, CFIAKGARIA, P.O. PANCHASAYAR, KOLKATA - 700 094, INDIA
RINKU GOGOI *
DEPARTMENT OF FISHERIES RESOURCE MANAGEMENT FACULTY OF FISHERY SCIENCES. WEST BENGAL UNIVERSITY OF ANIMAL AND FISHERY SCIENCES, 5. BUDHERHAT ROAD, CFIAKGARIA, P.O. PANCHASAYAR, KOLKATA - 700 094, INDIA
PUSPENDU SAMANTA *
DEPARTMENT OF FISHERIES RESOURCE MANAGEMENT FACULTY OF FISHERY SCIENCES. WEST BENGAL UNIVERSITY OF ANIMAL AND FISHERY SCIENCES, 5. BUDHERHAT ROAD, CFIAKGARIA, P.O. PANCHASAYAR, KOLKATA - 700 094, INDIA
OLIK JOMANG *
DEPARTMENT OF FISHERIES RESOURCE MANAGEMENT FACULTY OF FISHERY SCIENCES. WEST BENGAL UNIVERSITY OF ANIMAL AND FISHERY SCIENCES, 5. BUDHERHAT ROAD, CFIAKGARIA, P.O. PANCHASAYAR, KOLKATA - 700 094, INDIA
SNIGDHA BAKSI *
DEPARTMENT OF FISHERIES RESOURCE MANAGEMENT FACULTY OF FISHERY SCIENCES. WEST BENGAL UNIVERSITY OF ANIMAL AND FISHERY SCIENCES, 5. BUDHERHAT ROAD, CFIAKGARIA, P.O. PANCHASAYAR, KOLKATA - 700 094, INDIA
*Author to whom correspondence should be addressed.
Abstract
The present study attempts to understand the breeding season of Anabas testudineus (Bloch) collected from natural environment of Mohanpur in West Bengal. The fishes were length range of 100 to 160 mm and in the weight range of 15 to 62 gm. The total length of male Anabas was 107.6 ± 6.8 to 132.0 + 8 mm and in female was 109.4 + 5.68 to 154.5 ± 3.41 mm. The weight of the male fish was 13.6 ± 4.15 to 33.75 ± 4.67 gm and in female was 27.6 + 7.16 to 64.0 + 2.5 gm. The length of the testes '.vas found different and which was varying from 12.06 ± 0.95 mm to 22 7 ± 1.70 mm. The weight of the testes was increasing from 0.134 ± 0.04 gm in March to 1.52 + 0.64 gm in June. The length of the ovary in different body size varied from 13.6 ± 2.04 mm to 35.5 ± 2.38 mm. The weight of the ovary increased from 0.81 ± 0.81 in March to 4.72 ± 0.40 gm in June. The Gonado Somatic Index (GnSI) showed increasing with the approach of breeding season i.e. 0.16 + 0.05 to 2.518 ± 0.21. During the spawning period, length and weight of fish, length of the gonad, weight of the gonad and the GnSI were found gradually increasing upto peak breeding season (May and June).
Keywords: Anabas testudineus, length, weight, gonad, ovary and Gonado Somatic Index