Length-weight relationship for two Gobioid fishes Odontamblyopus rubicundus (Hamilton, 1822) and Pseudapocryptes elongatus (Cuvier, 1816) from the Bakkhali River estuary, Bay of Bengal

Abstract

Relationship between length and weight was described for two gobioid fishes, red eel goby Odontamblyopus rubicundus and Ianceolate goby Pseudapocryptes elongatus, from the Bakkhali River estuary, Cox’s Bazar, Bangladesh. The estimated growth coefficient (b) was 2.734 for O. rubicundus and 2.660 for P. elongatus, which indicated hypoallometric or negative allometric growth (b < 3) for both species. The mean values of the relative condition factor (K_n) for O. rubicundus and P. elongatus were 0.992 ± 0.055 and 1.039 ± 0.127, respectively. No information regarding length-weight relationship in O. rubicundus from the Bakkhali River estuary, Bay of Bengal, had earlier been reported, and no such information is documented in FishBase.

Išnagrinėtas Bakkhali upės žiotyse Cox’s Bazar, Bangladeše, gyvenančių dviejų grundalų rūšių (Odontamblyopus rubicundus ir Pseudapocryptes elongatus) ilgio ir svorio santykis. O. rubicundus (b = 2,734) ir P. elongatus (b = 2,660) augimo koeficientas parodė abiejų rūšių hipoalometrinį arba neigiamą alometrinį augimą (b < 3). Nustatytos abiejų žuvų rūšių santykinės būklės koeficientas buvo O. rubicundus K_n= 0,992 ± 0,055, P. elongatus K_n= 1,039 ± 0,127. Duomenų bazėje FishBase informacijos apie Bakkhali upės žiotyse gyvenančio O. rubicundus ilgio ir svorio santykį nėra.

Keywords:

• length-weight relationship
• relative condition factor
• mudskipper
• Odontamblyopus rubicundus
• Pseudapocryptes elongates

Acknowledgements

The authors would like to thank Bangladesh Fisheries Research Institute, Marine Fisheries and Technology Station, Cox’s Bazar, Bangladesh for providing necessary facilities during sample collection. Technical help from Md. Khurshid Alam Bhuiyan during drawing the map is highly appreciated. This study was supported by the Ministry of Education, Youth and Sports of the Czech Republic – projects “CENAKVA” (No. CZ.1.05/2.1.00/01.0024), “CENAKVA II” (LO1205 under the NPU I program), and GAJU 134/2013/Z.