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Life-history Traits of Pool Barb Puntius Sophore (cyprinidae) in Different Ecosystems of Bangladesh

Md. Yeamin Hossain
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi 6205, Bangladesh

Md. Nasir Uddin Pramanik
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi 6205, Bangladesh

Md. Alomgir Hossen
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi 6205, Bangladesh

Fairuz Nawer
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi 6205, Bangladesh

Dalia Khatun
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi 6205, Bangladesh

Most. Farida Parvin
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi 6205, Bangladesh

Obaidur Rahman
Department of Fisheries, Faculty of Agriculture, University of Rajshahi, Rajshahi 6205, Bangladesh

Zoarder Faruque Ahmed
Department of Fisheries Management, Faculty of Fisheries, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

Ferdous Ahamed
Department of Fisheries Management, Patuakhali Science and Technology University, Patuakhali, Bangladesh

Abstract/ Executive Summary:

This study describes the life history traits of Puntius sophore (Hamilton, 1822) including, length-frequency distributions (LFDs), length-weight relationships (LWRs), length-length relationships (LLRs), condition factors (allometric, KA; Fulton′s, KF; relative, KR and relative weight, WR), form factor (a3.0), first sexual maturity (Lm) and natural mortality (MW) from different ecosystems of Bangladesh. The LFDs were significantly different between the ecosystems (P < 0.001). Allometric coefficient (b) of LWRs (TL vs. BW) indicated positive allometric growth in the Padma River and in the earthen pond (b > 3.0), but isometric growth was found in the Khoilla beel (b ≈ 3). All LWRs were highly significant (P < 0.001) with all r2 values are ≥ 0.931. The ANCOVA stated that the LWRs were significantly different between the ecosystems (P < 0.001). In the present study KF was best for assessing the wellbeing of this species in the surrounding ecosystems. The WR was not significantly different from 100 indicating the habitats were still in good condition for P. sophore. Calculated a3.0 were 0.0162, 0.0225 and 0.0125 in the River, pond and beel, correspondingly. The estimated Lm was 5.60 cm TL in River, 6.30 cm TL in pond and 4.90 cm TL in beel and MW was 1.45, 1.48 and 1.81 year-1 in the River, pond, beel respectively. The findings i.e. growth pattern, relative weight, size at sexual maturity, mortality etc. of this study will be effective for the implications of sustainable management policies and to initiate stock assessment practices in the worldwide different ecosystem.

Keywords: Pool barb, Puntius sophore, Life history traits, Padma River, Bangladesh

Location: Padma River, Bangladesh

Start Date:

End Date:

Program Area: Resource Development and Management

Commodity: Wetland

Objectives:

This study reported the first complete and instructive description of life-history traits including length frequency distribution (LFDs), length-weight relationships (LWRs), length-length relationships (LLRs), condition factors (allometric, KA; Fulton′s, KF; relative, KR), relative weight (WR), form factor (a3.0), size at first sexual maturity (Lm), and natural mortality (Mw) of P. sophore from three different ecosystems (River, pond, beel) of Bangladesh using individuals with small to large body sizes. In addition, this study presents form factor and size at first sexual maturity of P. sophore from worldwide different water bodies.

Methodology:

This study was conducted in the (i) Ganges River, known as Padma River (Latitude 24°22′ N; Longitude 88°35′ E) in Bangladesh, (ii) L-shaped earthen pond in Campus of the University of Rajshahi (Latitude 24^o22′ N; 88^o38′), and Khoilla beel (24^o60′ N; 88o59′) in Bangladesh. The samples were collected from the fishermen catch at different parts (Godagari: 24°26′ N, 88°19′ E and Saheb bazaar: 24°20′ N, 88°34′ E) of the Padma River and from Khoilla beel, but the samples were harvested by ourselves from the L-shaped earthen pond of the University of Rajshahi. Fishes were collected from fishermen's catch that was caught using different types of traditional fishing gears, including cast net, square lift net, gill net from May 2014 to April 2015. Fresh samples (dead fish) were immediately chilled in ice on-site and fixed with 10% alcohol upon arrival in the laboratory. Total length (TL), fork length (FL), and standard length (SL) were measured to the nearest 0.1 cm using digital slide calipers and total body weight (BW) was measured using an electronic balance with 0.1 g accuracy for each individual. The length-frequency distributions (LFDs) for P. sophore were constructed using 1 cm intervals of TL. The LWR was calculated using the equation: W = a× Lb, where W is the body weight (BW in g) and L is the length (TL, FL and SL in cm). Parameters a and b were estimated by linear regression analyses based on natural logarithms: ln(W) = ln(a) + b ln(L). Additionally, 95% confidence limits of a and b and the coefficient of determination r2were estimated. According to 28, prior to the regression analyses of ln BW on ln TL, ln plots of length and weight values were performed for visual inspection of outliers, with extremes being omitted from the regression analyses. A t-test was used to confirm whether b values obtained in the linear regressions were significantly different from the isometric value (b = 3). Furthermore, LLRs including TL vs. FL; TL vs. SL and SLvs. FL relationships were estimated by linear regression.

Source of Information: Indian Journal of Geo Marine Sciences Vol. 47 (07), July 2018, pp. 1446-1454

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The calculated a3.0 was 0.0162, 0.0225 and 0.0124 for P. sophore in the River, pond and beel, respectively and it can be used to confirm whether the body shape of individuals in a given population or genus is significantly different from others 28. During our study, various Lm of P. sophore were observed in River, pond and beel, and it might be due to different environmental and biological factors. Also the MW was estimated as 1.45, 1.48 and 1.81 year-1 in River, pond and beel, respectively and it was higher in beel than in other ecosystems and it may be due to the reducing of water level, increasing water temperature, reckless fishing etc. In addition, our study calculates form factor and size at first sexual maturity of P. sophore from worldwide different water bodies, which would be more effective for sustainable management and conservation of P. sophore in the worldwide different ecosystems.

Knowledge Management: Journal