Effects of food availability and age on the reproductive effort of the apple snail, Pomacea canaliculata (Lamarck) (Gastropoda: Ampullariidae)

Gerardo F. Estoy, Jr.; Yoichi Yusa; Takashi Wada; Hironori Sakurai; Koji Tsuchida

doi:10.1303/aez.2002.543

Regular Papers

Effects of food availability and age on the reproductive effort of the apple snail, Pomacea canaliculata (Lamarck) (Gastropoda: Ampullariidae)

Gerardo F. Estoy, Jr., Yoichi Yusa, Takashi Wada, Hironori Sakurai, Koji Tsuchida

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Keywords: Pomacea canaliculata, food, age, reproductive effort

JOURNAL FREE ACCESS

2002 Volume 37 Issue 4 Pages 543-550

DOI https://doi.org/10.1303/aez.2002.543

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Abstract

The effects of food availability and age on the reproductive traits of Pomacea canaliculata were determined in snails fed at three food levels under laboratory conditions (14L:10D; 25°C). In males, copulation frequency tended to increase with age, while food availability did not affect copulation frequency. In females, spawn production was lower in food-limited conditions, but current or weight-specific reproductive effort (RE) did not differ among food levels. The weight-specific RE and spawn frequency of the well-fed females decreased with age, but their current RE increased with age.

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