Title of article :
Imposex in the golden apple snail Pomacea canaliculata in Taiwan
Author/Authors :
Wenhui Liu، نويسنده , , Yuh-Wen Chiu b، نويسنده , , Da-Ji Huang، نويسنده , , Ming-Yie Liu، نويسنده , , Ching-Chang Lee، نويسنده , , Li-Lian Liu، نويسنده , , ?، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2006
Abstract :
The golden apple snail Pomacea canaliculata (Lamarck, 1822) was introduced into Taiwan intentionally in the early 1980s and
has become a recurring pest that seriously threatens aquatic crops. In this study, a field description of imposex with a developed
penis sheath and penis in female golden apple snails from crop/domestic wastewater drainage sites and a six-order river is presented
for the first time. Based on the five field collections and the aquarium group, the vas deferens sequence (VDS) of P. canaliculata in
imposex development was categorized into four stages, i.e., stage 0: without male genital system; stage 1: with rudimentary penis;
stage 2: with rudimentary penis and penis sheath; and stage 3: the rudimentary penis developing into penis pouch and penis. The
VDS indices varied between 1.07 and 2.82 and were lowest in the aquarium group and Yuanlin2. Regarding the severity of
imposex, the aquarium group was less pronounced, as illustrated by the length of penis sheath and penis length, than the field
collections (pb0.05). In respect of the penis length, males of the most imposex-affected site were up to 15% shorter than that of the
aquarium group. Negative correlations between male penis length and female imposex characters (i.e., penis length and penis
sheath length) were also observed.
Keywords :
Apple snail , Pomacea canaliculata , Organotin , Imposex
Journal title :
Science of the Total Environment
Journal title :
Science of the Total Environment