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<span style="font-size:11.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;mso-ansi-language:EN-GB;mso-fareast-language:EN-US;mso-bidi-language: HI;mso-bidi-font-weight:bold" lang="EN-GB">I<span style="font-size:11.0pt; font-family:"Times New Roman";mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:Mangal;mso-ansi-language:EN-GB;mso-fareast-language:EN-US; mso-bidi-language:HI" lang="EN-GB">mposex in <i>Babylonia spirata</i> (Gastropoda: Babyloniidae) from Pakistan (Northern Arabian Sea)</span></span>

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Title Imposex in Babylonia spirata (Gastropoda: Babyloniidae) from Pakistan (Northern Arabian Sea)
 
Creator Afsar, Nuzhat
Siddiqui, Ghazala
Ayub, Zarrien
 
Subject Ovo-testis
Babylonia spirata
Organotin
Karachi
 
Description 418-424
This is the first report of the occurrence
of imposex in the neogastropod Babylonia
spirata (Linnaeus, 1758) from Pakistani waters. Studies were carried out at
Manora Channel, which is situated in the vicinity of Karachi
port and fish harbor, the hub of commercial boating activity in Pakistan. Other
two sites Buleji and Sonmiani are free of such activity and were therefore
considered as reference sites. Specimens of B.
spirata were morphologically and histologically examined. Specimens showing
imposex were only found at Manora Channel. Incidence of imposex was 73.7% and
the vas deferens sequence (VDS) were ranked to be between 1 to 4+. The average
VDSI was 0.42 whereas the average relative penis length index (RPLI) was 14.45
and the relative penis size index (RPSI) was 0.32. Both normal and imposex females
generally showed normal gonadal development. However, evidence of an ovo-testis
was found in histological sections of normal and imposexed female of B. spirata gonads examined from Manora
Channel. At Manora Channel the sex ratio was significantly in favour of females
whereas at Buleji and Sonmiani, it was close to unity (1:1).
 
Date 2012-10-17T06:03:54Z
2012-10-17T06:03:54Z
2012-10
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/14874
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.41(5) [October 2012]