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An Investigation on Breeding Biology of Vietnam Strain of Climbing Perch, Anabas Testudineus (bloch) Reared in a Commercial Hatchery

Hafijunnahar
Department of Fisheries and Marine Bioscience, Faculty of Biological Science and, Technology, Jessore University of Science and Technology Jessore-7408, Bangladesh.

Md. Anisur Rahman
Department of Fisheries and Marine Bioscience, Faculty of Biological Science and, Technology, Jessore University of Science and Technology Jessore-7408, Bangladesh.

Md. Mer Mosharraf Hossain
Department of Fisheries and Marine Bioscience, Faculty of Biological Science and, Technology, Jessore University of Science and Technology Jessore-7408, Bangladesh.

Abstract/ Executive Summary:

An investigation was conducted to know the breeding biology of Vietnamese climbing perch (Anabas testudineus), locally known as Koi. Monthly samples were collected from Rupali Fish Hatchery throughout the period from January to July 2014. Five gross ovarian stages i.e. immature (mean ova diameter 0.17±0.05 mm), maturing (mean ova diameter 0.33±0.05 mm), mature (mean ova diameter 0.63±0.11 mm), ripe (mean ova diameter 0.76±0.08 mm) and regressing (mean ova diameter 0.29±0.09 mm) were observed. The highest mean GSI value for female and male were 14.91 and 8.33 respectively in May that indicates the peak breeding season. Size at first maturity for female was approximately 20.5 cm in total length and fecundity was ranged from 50610 to 227378. The relationship between fecundity and total length (TL), fecundity and body weight (BW), fecundity and ovary weight (OW) and fecundity and ova diameter (OD) were linear. The present study provides the first detailed information about the breeding biology of Vietnamese Koi in Bangladesh. Therefore, the results will play a vital role for the induced breeding, proper management and conservation of this species.

Keywords: Vietnamese climbing perch, Maturity stages of ovary, GSI, Size at first maturity, Fecundity

Location: Jessore

Start Date: 00-01-2014

End Date: 00-07-2014

Program Area: Animal Health and Management

Commodity: Koi/Climbing

Objectives:

To describe the breeding biology such as maturity stages of ovary, size at first maturity, GSI and fecundity and peak breeding season of Vietnamese Koi

Methodology:

Sample collection: The brood fishes were monthly collected from Rupali Fish Hatchery’s own brood ponds, Jessore (during January to July 2014). The fishes were cultured as a monoculture in a particular stocking density at the pond. Then the broods were caught by a cast net from the pond and the live fishes were carefully transported to the laboratory after recording the sex. 2.2. Water quality measurement: Water quality parameters were measured weekly including temperature using a Celsius thermometer. Dissolved oxygen and pH were measured using a digital DO (HANNA, model HI 9142) meter and a direct reading digital pH meter (HANNA, model HI 9025) respectively. Morphometry: The total length of each fish was measured using a centimeter scale and the body weight was determined by an electronic balance. The fishes were killed by piercing a pin on the head and dissected out by scissors. Then size, colour and appearance of the ovary were recorded. Gonad-somatic index (GSI): Gonad-somatic index is the percentage of gonad weight to the total weight of the fish. GSI of the male and female were determined. Ova diameter: Diameter of the ova was measured from each of the anterior, central and posterior portion of the ovaries by a photographic microscope (model: Zeiss Primo Star, Germany) with 10 X × 10 X individual fishes magnifications. Size at first maturity: Size at first maturity, which is defined as the total length (cm) at where 50% of the sample in maturity stage III, were analyzed using cumulative percentage. The fishes were grouped into 1 cm size classes and the percentage mature in each size class was calculated. Fecundity: The fecundity or the numbers of eggs were estimated from ovaries of fishes in mature stage III and ripe stage IV. The method used for fecundity which involved counting of the number of mature ova in a portion of known weight of ovary and then calculating the total number of mature ova. The relationship between fecundity and various parameters such as the total length (TL), body weight (BW), ovary weight (OW), ova diameter (OD) were estimated by the least square method

Source of Information: International Journal of Fisheries and Aquatic Studies 2016; 4(1): 08-12, ISSN: 2347-5129

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Five gross ovarian stages i.e. immature (mean ova diameter 0.17±0.05 mm), maturing (mean ova diameter 0.33±0.05 mm), mature (mean ova diameter 0.63±0.11 mm), ripe (mean ova diameter 0.76±0.08 mm) and regressing (mean ova diameter 0.29±0.09 mm) were observed. The highest mean GSI value for female and male were 14.91 and 8.33 respectively in May that indicates the peak breeding season. Size at first maturity for female was approximately 20.5 cm in total length and fecundity was ranged from 50610 to 227378. The relationship between fecundity and total length (TL), fecundity and body weight (BW), fecundity and ovary weight (OW) and fecundity and ova diameter (OD) were linear.

Knowledge Management: Journal