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Morphometric Characters and Condition Factors of Five Freshwater Fishes from Pagla River of Bangladesh

M. Manjurul Alam
Department of Fisheries, University of Rajshahi, Rajshahi-6205, Bangladesh

Md. Tohidur Rahman
Department of Fisheries, University of Rajshahi, Rajshahi-6205, Bangladesh

Selina Parween
Department of Zoology, University of Rajshahi, Rajshahi-6205, Bangladesh

Abstract/ Executive Summary:

The research was aimed to carry out the length-length relationships, length-weight relationship and condition factor of five freshwater small indigenous fish species i.e. Amblypharyngodonmola, Puntiusticto, Cirrhinusreba, Chanda nama and Aspidopariamorar from the Pagla river Bangladesh. The relationships equations among different body length parameters of each species were found highly significant. The length-weight relationship equation were found as TW=0.0351 TL2.86 for A. mola, TW = 0.0104 TL3.10 for P. ticto, TW = 0.0261 TL2.96 for C. reba, TW = 0.0175 TL2.845 for C. nama TW= 0.0101 TL3.05 for A. morar. The “b” values ranged from 2.845-3.10 which remained on the expected range of optimum growth.

Keywords: Amblypharyngodon, Aspidoparia, Puntius, Cirrhinus, Chanda

Location: Pagla river, Chapai Nawabgonj district

Start Date: 00-10-2011

End Date: 00-01-2012

Program Area: Conservation and Biodiversity

Commodity: Fish

Objectives:

The present study aimed to find out the present status of length-length and length-weight relationship and condition factor of five species i.e.Amblypharyngodon mola, Puntius ticto, Cirrhinus reba, Chanda nama, Aspidoparia morar. Findings of the work will play an important role for the successful management of these species to conserve from probable depletion of their wild stock in future.

Methodology:

The specimens were collected from the fishers of Pagla river, Chapai Nawabgonj district (lies between 24°40'N and 24°42'E latitude and between 88°08'N and 88.11°'E longitudes) north-west end of Bangladesh during day time from October, 2011 to January, 2012. During the perioda total of 260 specimens (each of 52) were collected and identified to the species level according to Rahman (2005) and preserved by date in plastic jars with 5% formalin to save from spoilage. For each individual different body lengths e.g. total length (TL), standard length (SL), dorsal length (DL), pectoral length (PL), pelvic length (PvL), anal length (AL), head length (HL) were measured using a digital slide calipurse and the total weight (TW) was measured using a digital balance Model: KD-300KC with 0.01g accuracy according to Simon and Mazlan (2008) and Alam et al. (2012). The relationships among all body length parameters were determined using the method of least squares to fit a linear regression as: Y = a + bX. Where, Y = various body lengths, X = total length, a = Proportionality constant and b = Regression coefficient (Alam et al., 2012). The length-weight relationships were determined by the general equation of TW = a TLb (LeCren,1951), Where, TW is the total weight (expressed in g), TL is the total length (expressed in cm), “a” is a coefficient related to body form and “b” is an exponent indicating isometric growth when equal to 3 and indicating allometric growth when significantly different from 3 (Simon and Mazlan,2008; Simon et al., 2009). The parameters “a” and “b” of the exponential curve were estimated by linear regression analysis over log-transformed data expressed as: log TW=loga + blog TL. The values of the constant “a” and “b” of the linear regression was determined by following Rounsefell and Everhart (1953) and Lagler (1966). The Fulton’s condition factor, K was calculated by using the following formula-K = (TW/TL3) × 100, Where, K = Fulton’s condition factor, TW= Total weight, TL = Total length. Here, factor 100 is used to bring K close unity. The data were analyzed usings of tware SPSS, version 15.0.

Source of Information: Int.J.Aquat.Biol.(2014) 2(1): 14-19E-ISSN: 2322-5270; P-ISSN: 2383-0956Journal homepage:

Article Link (Online Journal): www.ij-aquaticbiology.com

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Findings of the present study has provided some new and updated information on the morphometric characters of five freshwater fish species of Pagla river representing the status of other small indigenous fish species of Bangladesh. Outcome of the present investigation will play important role for the management and conservation of these species as well as other small indigenous fish species of Bangladesh.

Knowledge Management: Journal