Reproduction and Juvenile Growth of the Invasive Apple Snails Pomacea canaliculata and P. scalaris (Gastropoda: Ampullariidae) in Taiwan

Abstract

= 0.93, p < 0.001) and y = 1.428 + 0.203x - 0.001x 2 (R 2 = 0.86, p < 0.0001) when fed dry fish feed, and the final shell lengths were 15.8-43.5 and 10.2-31.0 mm, respectively. Significant differences in growth between the 2 species were observed 2 wk after hatching and onwards. Additionally, the 1st laboratory oviposition by P. canaliculata and P. scalaris occurred on days 175 and 163, respectively. Our results indicate that a smaller hatching size and inferior growth performance of P. scalaris may also have played a role in shaping its distribution in Taiwan. http://zoolstud.sinica.edu.tw/Journals/50.1/61.pdf