Some Aspects of Reproduction in Amblypharyngodonmola from Sylhet, Northeast Bangladesh

Abstract

Themolacarplet,Amblypharyngodonmola(Hamilton,1822)isthemostcommonsmallindige-nous freshwater fish species in Bangladesh. The precise information addressing the reproduction in this species including breeding peak, ovarian histology, morphometry, and sex ration in nature is still insufficient. A one yearlong filed survey and different laboratory assays have been directed to disclose some key features of reproduction in female A. mola from wetland reservoirs in the great-er Sylhet region in Bangladesh. The total length and the body weight have shown a strong correla-tionwithgonadweight,occupyingstatisticalr2valuesof0.89and0.91,respectively.However,aChi-square test at P lt;0.05 reported no significant deviation in sex ration of the wetland’s stock. The maximum fecundity has been reported during the month of May as 12569+620 while the lowest is duringthemonthofJulyas9377+455.ThehighestvaluesforgonadosomaticindexhavebeenreportedinMaywhilethelowestisinJanuarywithanotherpeakinNovember.Thehistologicalstudy of ovarian cells resulted in the characterization of oocytes, previtellogenic oocytes, vitello-genic oocytes, perinuclear oocytes, and mature cells with yolk mass.

Keywords

• amblypharyngodon mola
• sex ration
• gsi
• fecundity
• morphometric regression analysis
• gonadal histology