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<span style="font-size:15.0pt;font-family: "Times New Roman";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;color:black;mso-ansi-language:EN-GB;mso-fareast-language:EN-US; mso-bidi-language:AR-EG" lang="EN-GB">Aspects on the reproductive cycle of <i>Donax semistriatus </i>and<i> Donax trunculus</i> (Mollusca: Bivalvia) in Idku, Egypt</span>

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Title Aspects on the reproductive cycle of Donax semistriatus and Donax trunculus (Mollusca: Bivalvia) in Idku, Egypt
 
Creator Ibrahim, R.M.
Mohammad, S.H.
Mohamed, S.Z.
Morsy, Z. S.
 
Subject Donax semistriatus
Donax trunculus
Donacidae
Reproduction
Egypt
 
Description 287-296
Present study deals with the reproductive cycle of the
two clams Donax semistriatus and Donax trunculus (Bivalvia:
Mollusca) and it is the first in this region. Specimens of these animals were
collected monthly from two sites, one of them located at waterway that
discharges waste water from irrigation canal. The reproductive stages of D.
semistriatus and D. trunculus were classified into: inactive, early active, late
active, ripe, partially spent and spent stages. Males of D. semistriatus
were higher than females at both sites (male: female ratio was 1.47:1 in site 1 and
1.54:1 in site 2). Meanwhile, male  D. trunculus outnumbered females in site 1 (1.38:1), and females made up a slightly
higher proportion than males (1:1.13) in site 2. The sexual cycle of both species showed
inactive gonad in the winter while the sexual activity was mainly detectable
during spring and summer. Both species showed no signs of
hermaphroditism. Temperature is found to be the factor which possibly triggers
reproduction.
 
Date 2016-07-05T09:03:06Z
2016-07-05T09:03:06Z
2015-03
 
Type Article
 
Identifier 0975-1033 (Online); 0379-5136 (Print)
http://hdl.handle.net/123456789/34680
 
Language en_US
 
Rights CC Attribution-Noncommercial-No Derivative Works 2.5 India
 
Publisher NISCAIR-CSIR, India
 
Source IJMS Vol.44(03) [March 2015]