Agricultural Research Management Information System

Home
Research Summary
Search
About Us
- ARMIS
- Brochure
Contact Us
Report
User Request
Data Input
Help
- Operation Manual
  - PDF
  - Video
- Program Area & Commodity
We have reached 37600 number of research entries at this moment.

- Logout

Research Detail

Home
Research
Detail

Morphometric Relationships Between Length-weight and Length-length of Apocryptes Bato (gobiidae) in the Payra River, Southern Bangladesh

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

Newton Saha
Department of Fisheries Management, Patuakhali Science and Technology University, Patuakhali, Bangladesh

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

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

Abstract/ Executive Summary:

Length-weight relationships (LWRs) and length-length relationships (LLRs) of Apocryptes bato were studied in the Payra River, southern Bangladesh. Monthly samples were collected from the small-scale fishers of set bag net fishery in the Payra River during May 2016 to April 2017. All specimens were separated on the basis of sex and standard length (SL), total length (TL), anal length (AL) and body weight (BW) were measured. The allometric coefficient ‘b’ of the LWRs indicated negative allometric growth in males, females and unsexed. The allometric coefficient ‘b’ of the LLRs between SL vs. TL indicated positive allometric growth, while TL vs. AL and SL vs. AL indicated negative allometric growth in males, females and unsexed individuals respectively. These results will be useful for fishery managers to impose adequate regulations for sustainable fishery management not only in the Payra River of but also in the surrounding water bodies of Bangladesh.

Keywords: Length-weight relationships, Length-length relationships, Payra River, Apocryptes bato

Location: Payra River, southern Bangladesh

Start Date: 00-04-2016

End Date: 00-04-2017

Program Area: Animal Health and Management

Commodity: Fish

Objectives:

The Payra River is considered as an important spawning and feeding ground for coastal riverine fishes of Bangladesh and a large number of these species including A. bato are fished by both small and large-scale fishers throughout the year. However, to the best of our knowledge, very few information on the LWR and LLR of A. bato are available in the literature from different water bodies and no studies from the Payra River hampering the formulation of sound management strategies for this important fishery. Therefore, this paper describes the LWRs and LLRs of A. bato in the Payra River, southern Bangladesh.

Methodology:

The present study was conducted in the Payra River running through Patuakhali, a southern district of Bangladesh (straddling 22º 35´ N and 90º 26´ E). The river originated from the Tetulia River via the Karkhana River and finally falls into the Bay of Bengal by the name of Burishwar River. Monthly samples were collected from the small-scale fishers of set bag net fishery in the Payra River during May, 2016 - April, 2017. All collected specimens were preserved in 10% formalin and transferred to the laboratory for analysis. For each individual, standard length (SL), total length (TL) and anal length (AL) was measured to the nearest 0.01 cm using a measuring scale, while the body weight (BW) was recorded using a digital balance (AND, FSH, Korea) to 0.01 g accuracy. Sex determination was done by incision of the abdomen of each individual and visual inspection of the gonad by naked eye. The LWR was estimated by linear regression analysis based on natural logarithms: ln (W) = ln (a) + b ln (L), where W is the body weight (BW g) and L the standard length (SL cm), total length (TL cm) or anal length (AL cm). Additionally, 95% confidence limits of a and b, and the coefficient of determination r² were estimated. According to Froese, all extreme outliers were excluded from the analyses. Furthermore, SL vs. TL, SL vs. AL and TL vs. AL were estimated by linear regression separately for male, female and unsexed specimens. A t-test was applied to determine significant differences from the isometric value (b= 3.0 for length-weight relationship and b = 1.0 for length-length relationship). Deviation of the b value from the theoretical isometric value indicates either positive (b > isometric value) or negative (b < isometric value) allometric growth. Analysis of covariance (ANCOVA) was used to test for significant differences in slopes and intercepts among the relationships.

Source of Information: International Journal of Fisheries and Aquatic Studies 2017; 5(4): 346-349

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

This study has provided basic information on the LWRs and LLRs that would be useful for fishery biologists/managers to impose adequate regulations for sustainable fishery management in the Payra River and surrounding water bodies of Bangladesh. However, further detailed studies are necessary for future assessment.

Knowledge Management: Journal