Histological study of gonadal development of Turbo coronatus (Gmelin, 1791) (Gastropoda: Turbinidae) from Karachi coast, Pakistan
Gonadal developmental stages and temporal trends of the Turbo coronatus were determined over one year study period during August 2005 to July 2006 in populations inhabiting rocky shores of Buleji and rocks of seawall at Manora Channel, coastal areas of Karachi. Studies were based on histological examination of gonads as well as Turbo populations at two sites found in spawning state throughout the year. The gonads of Turbo coronatus at both localities were never found in completely spent condition, thus suggesting that they are partial spawners. Generally, it appears that spawning in males and females of T. coronatus at Manora channel is slightly asynchronous as compared to Buleji where spawning pattern seems to be more synchronous. Oocytes diameter in specimen of this species at Manora was significantly larger than that of specimens studied from Buleji (ANOVA: F=6.22; P<0.05). The overall sex-ratio was close to 1:1 theoretical ratio at both of the sites.
| Main Authors: | , |
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| Format: | article biblioteca |
| Language: | English |
| Published: |
2016
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| Subjects: | Biology, Turbinid, archaeogastropod, gonadal development, northern Indian Ocean, |
| Online Access: | http://hdl.handle.net/1834/40808 |
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