ISSN: 2577-4050
Authors: Chakraborty BK*, Shahroz MH and Salma AS
Very useful control natural breeding indicators Gonado-somatic Index (GSI), fecundity, and length, body weight and gonad weight relationship with fecundity was studied to identify accurate spawning period of Monopterus cuchia over a period of January to December 2017. Highest GSI value was found in the month of May and lowest was recorded in December for both sexes. Length, body weight and gonad weight relationship with fecundity was exponential equation (lnF= 1.3576e0.1087x, R2= 0.8004; lnF = 117.2e0.0049x, R2= 0.6089 and lnF= 362.35e0.0229x, R2= 0.696). Length, body weight and gonad weight data were correlated with fecundity. The highest condition index was found at the value of 2.119542 for female in May 2017 and lowest was recorded at 1.857057 in January 2017. Control natural breeding of M. cuchia was carried out at the two cisterns of Fish Seed Multiplication Farm Sadar, Netrokona as a treatment T1; Nimgachi, Sirajgonj as a treatment T2 and Parbotipur, Dinajpur as a treatment T3. Plastic bowel for first 25 days and cement cistern for second 25 days was developed for nursing of larvae for every treatment. A continuous monitoring was observed to collect fertilized eggs from the mouth of the hole of the berm. Fertilized eggs were collected and stocked in different plastic bowel through a series of collection. The responsive number of female in ovulation was 91.50, 78.50 and 71.00% and the number of collecting eggs from the hole was at 9218.50, 11010.50 and 13642.00 in treatment T1, T2 and T3. The fertility rate was recorded at the rate of 94.50, 89.00 and 85.50%, and the hatching rate was 89.00, 84.00 and 80.50% in treatment T1, T2 and T3. After 50 days, the final mean weight of fry recorded at 12.55, 12.30 and 12.08 g in treatment T1, T2 and T3, respectively. So, stocking density of male and female 50:50 in treatment T1 was a sustainable technology of control natural breeding.
Keywords: Monopterus Cuchia; Control Natural Breeding; Fertility Rate; Hatchling Rate; Gonado-Somatic Index; Fecundity; Condition Factor
