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Effects of Different Age Groups of Female Brood Stocks on the Reproductive Performance of Catla (catla Catla)

Shammi Aktar
Department of Fisheries and Marine Bioscience, Jashore Science and Technology University, Bangladesh

Md. Habibur Rahman
Department of Fisheries and Marine Bioscience, Jashore Science and Technology University, Bangladesh

Moumita Choudhury
Department of Environmental Science and Technology, Jashore Science and Technology University, Bangladesh

Syeda Maksuda Yeasmin
Department of Fisheries and Marine Bioscience, Jashore Science and Technology University, Bangladesh

Md. Almamun Farid
Department of Fisheries and Marine Bioscience, Jashore Science and Technology University, Bangladesh

Md. Anisur Rahman
Department of Fisheries and Marine Bioscience, Jashore Science and Technology University, Bangladesh

Abstract/ Executive Summary:

The study was conducted with doses 4, 5, 6, and 7 mg/kg body weight of Pituitary gland extract to determine the dose that will give the best result for induced breeding from March 2017 to July 2017 at Ma Fatema Hatchery, Jashore. The higher spawning fecundity was found in 5 mg/kg with value 760737±50169 contrary in 4, 6, and 7 mg/kg doses; the number was 684009±34818, 729355±65443and 737826±25416, respectively. At the dose 5 mg/kg ovulation rate, fertilization rate, hatching rate, survival rate, and deformity rate were found 100%, 88.64±2.09%, 86.09±2.58%, 87.78±3.27%, and 3.45±1.42%, respectively. PG treated fishes showed the best result at a dose of 5 mg/kg. Then 5 mg PG was used to find out the effects of different age groups of female broods. To determine the suitable age of broods three age groups were used. The mean weight of female broods of 2, 3, 4 years old were 3.22±0.39, 4.58±0.38, and 5.25±0.13 kg, respectively. The gonad somatic index was 24.12%, 21.32%, and 20.04%; mean absolute fecundity 624016±34136, 726900±25805, and 767783±17917 in 2, 3, and 4 years female broods, respectively. In treatment 2, 3, and 4 years female broods’ ovulation rates were 66.67%, 100%, and 100%; fertilization rates were 75.64±2.12%, 85.88±3.00%, and 89.84±3.49%, respectively. The hatching rate were 71.38±3.39%, 82.94±3.52%, and 87.70±4.73%; Survival rates before start feeding were 74.09±3.33%, 78.52±4.31%, and 88.12±3.38% in 2, 3, and 4 years age groups, respectively. Better breeding performance regarding fertilization and hatching rate was reported in 3 and 4 years females than 2 years ago.

Keywords: Age group, Brood stocks, Induced breeding, Katla

Location: Fisheries and Marine Bioscience Department, Jashore University of Science and Technology.

Start Date: 00-03-2017

End Date: 00-07-2017

Program Area: Animal Health and Management

Commodity: Catla

Objectives:

The present study is aimed at comparing the influence of varying dosage of pituitary gland extract on the number of eggs/spawning fecundity, ovulation, fertilization, hatching, survival, and deformity rate of Catla and to evaluate the effects of different ages of female broods in respect of ovulation, fertilization, hatching, and survival rate of Catla.

Methodology:

The experiment was conducted in the Ma-Fatema Hatchery, Chanchra, Jashore from March 2017 to July 2017 under induced spawning condition,s and a part of that research were also done in the laboratory of Fisheries and Marine Bioscience Department, Jashore University of Science and Technology. The total no. of the fish was thirty, consisting of 30 females and 42 males. The weight of test fish for females is 3.22±0.39 Kg for two years, 4.58±0.38 Kg for three years, and 5.25±0.13 Kg for four years, respectively. The broods of 2, 3, and 4 years ages were kept in separate brood ponds of Ma-Fatema hatchery. Age was determined on the basis of the hatchery owner's information. At first brood fish was selected randomly for dose optimization. To determine the age effect hatchery-reared healthy, uninjured, and fully mature carps of 2 years male and 2, 3, and 4 years female brood fishes Determination of sex Better quality and properly matured male and female brood fishes were gathered according to Muir and Robert (1985). Sex ratio For induced breeding purposes and different age groups identifying, brood fishes were assembled from the brood-rearing pond of the hatchery complex and kept in the concrete tank with a 2:1 ratio of male and female. Broodstock management During the period of the experiment, a special feed enriched with protein and vitamin E was formulated which enhanced the gonadal maturation of fishes.

Source of Information: International Journal of Biosciences- Vol. 19, No. 2, p. 23-35, 2021

Article Link (Online Journal): http://dx.doi.org/10.12692/ijb/19.2.23-35

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

PG at the dose of 5mg/kg showed a significantly good result (P<0.05)ensuring quality eggs and more larvae in respect of ovulation (100%), spawning fecundity fertilization rate hatching rate, survival rate, and a deficient number of deformed larvae. Better breeding performance regarding fertilization, hatching, and survival rate was found in 4 years females which showed a higher level of significant difference (P<0.05) than others age groups. The selection of four years female broods of Catla in the hatchery for better breeding performance is recommended for fish breeders in Bangladesh.

Knowledge Management: Journal