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Investigation of Imposex in a Marine Gastropod Tibia curta (Sowerby II, 1842) at Gadani Ship Breaking Yards

Investigation of Imposex in a Marine Gastropod Tibia curta (Sowerby II, 1842) at Gadani Ship Breaking Yards

Seharish Munawar and Nuzhat Afsar*

Institute of Marine Sciences (IMS), University of Karachi, Karachi 75270, Pakistan.

 
*Correspondence | Nuzhat Afsar, Institute of Marine Sciences (IMS) University of Karachi, Karachi 75270, Pakistan; Email: nafsar@uok.edu.pk

Figure 1:

Map is showing collection sites (1-4).

Figure 2:

Showing scheme of imposex and Vas Deferens stages (VDS) (Oehlman et al., 1992). 

Figure 3:

A- Tibia curta (dorsal and ventral view), B- Male with penis length (>70 mm), C- Imposex female with dissimilar tentacles, D and F- imposex with VDS formation, E- imposex female with pseudopenis, VDS formation and unequal eye spot.

Figure 4:

A showing % total number of individual at all four sites and B showing % male, female and imposex at collection sites.

Sarhad Journal of Agriculture

September

Vol.40, Iss. 3, Pages 680-1101

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