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Research Detail

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Abdus Salam Bhuiyan
Department of Zoology, University of Rajshahi, Rajshahi-6205, Bangladesh

Khairul lslam
Department of Fisheries, University of Rajshahi, Rajshahi-6205, Bangladesh

Tanjeena Zaman
Department of Fisheries, University of Rajshahi, Rajshahi-6205, Bangladesh

The exotic barb Puntius gonionotus was introduced into Bangladesh in 1987. Its faster growth rate, nice taste and compatibility with our culturable species have made it very popular food fish in Bangladesh. With a view to providing some basic information towards development of sustainable seed production of the species, a study was undertaken to determine the fecundity and ovary characteristics of the fish. The mean fecundity of 55 gravid females (of 11 length group) of Puntius gonionotus was obtained as 14321 with a range of 2254.67 to 6964.73 from fishes having a mean total length and mean body weight of 200.13 ± 20.58 mm and 196 ± 34.379 g respectively. The relationship between the fecundity (F) and total length (TL), total body weight (TW), ovary length (OL) and ovary weight (OW) were established. Regression analysis was made and the co-efficient of correlation (r) was calculated for each of the following F - TL, F - TW, F - OL and F - OW and the values of r were obtained to be 0.84,0.84,0.95 and 0.96 respectively. In all the cases linear relationships obtained were highly significant.

  Fecundity, Puntius gonionotus, Ovarian characteristics
  Rajshahi
  01-01-2002
  31-12-2003
  Resource Development and Management
  Carp fish

To estimate the average and range in the number of ova laid by individual female during the breeding season,

To study the relationship of the fecundity (F) with total length (TL), total body weight (TW), ovary length (OL) and ovary weight (OW).

For the study of fecundity, 55 (in 11 length group) samples were collected on weekly basis during the period from January 2002 to December 2003. After collection the specimens were sorted out and were preserved in 10% formalin in labelled plastic jars. All these fishes were separated according to sex and the gravid females were recorded for sex ratio and percentage of occurrence.  The total length and weight of the fishes were recorded to the nearest mm and gram, respectively. After dissection the ovaries were taken out and then moisture was thoroughly wiped out from the ovaries with blotting paper and weighed by a sensitive balance. In the present study gravimetric method was used for the estimation of fecundity. Three samples about 10 g each were taken from the anterior, middle and posterior regions of each ovary. The numbers of eggs in each of the sub- samples were counted with the help of a magnifying glass. The average numbers in sub- sample were multiplied by the weight of the ovary, and fecundity was estimated by formula.

  JOURNAL OF BIO-SCIENCE, THE INSTITUTE OF BIOLOGICAL SCIENCES RAJSHAHI UNIVERSITY, Vol. 14, 2006, pp. 99-102, ISSN 1023–8654.
  
Funding Source:
  

It can be said that in P. gonionotus the relationships of the fecundity (F) with total length (TL) and total body weight (TW) were linear. The relationships of fecundity with ovary length (OL) and ovary weight (OW) were found to be strongly correlated. P. gonionotus is a moderately fecund fish and the numbers of eggs produced were more or less directly proportional to the TL., TW, OL and OW.

  Journal
  


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