Algumas observações de laboratório sobre biologia e ecologia de Pomacea haustrum (Reeve, 1856)
TLDR
Laboratory observation on the pilid Pomacea haustrum (Reeve, 1856), competitor and predator of Manson's schistosomiasis intermediate hosts, have shown that males and females reach sexual maturity after one year, copulating preferably in the morning and laying eggs at night.Abstract:
Laboratory observation on the pilid Pomacea haustrum (Reeve, 1856), competitor and predator of Manson's schistosomiasis intermediate hosts, have shown that: Males and females reach sexual maturity after one year, copulating preferably in the morning and laying eggs at night. The time spent in these acts is variable; in the case of egglaying it depends on the number of eggs to be laid. The eggs are round, about 3mm in diameter, and have a pink color that changes with the development of the embryos. With an average incubation time of 15 to 23 days and conditioned by the temperature of the environment, they resist for 5 to 6 days immersed in water without damage to th embryos and they do not need light to hatch. The newly-hatched specimens have about 2.4 x 1,7 mm of height and diameter, respectively. The specimens bred alone grow more and survive better that when in a group. They resist for at least 90 days when left dry, remaining during this period enclosed in the shell, with the operculum hermetically closed, in hydrobiosis. In this phase, death by attack of diptera-larvae may occur.read more
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Insights from an Integrated View of the Biology of Apple Snails (Caenogastropoda: Ampullariidae)
Kenneth A. Hayes,Kenneth A. Hayes,Kenneth A. Hayes,Romi L. Burks,Alfredo Castro-Vazquez,Philip C. Darby,Horacio Heras,Pablo Rafael Martín,Jian-Wen Qiu,Silvana C. Thiengo,Israel A. Vega,Israel A. Vega,Takashi Wada,Yoichi Yusa,Silvana Burela,M. Pilar Cadierno,Juan Agustín Cueto,Federico A. Dellagnola,Marcos S. Dreon,M. Victoria Frassa,Maximiliano Giraud-Billoud,Martín S. Godoy,Santiago Ituarte,Eduardo Koch,Keiichiro Matsukura,M. Yanina Pasquevich,Cristian Rodriguez,Lucía Saveanu,Maria Emilia Seuffert,Ellen E. Strong,Jin Sun,Nicolas Eduardo Tamburi,María José Tiecher,Richard L. Turner,Patricia L. Valentine-Darby,Robert H. Cowie +35 more
TL;DR: The great majority of the work to date concerns a single species, Pomacea canaliculata, which the authors see as having the potential to become a model organism in a wide range of fields, however, additional comparative data are essential for understanding this diverse and potentially informative group.
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Predation on eggs of the apple snail pomacea canaliculata (gastropoda: ampullariidae) by the fire ant solenopsis geminata
TL;DR: The proportion of lost eggs was highly variable among egg masses, but there was no difference between day and night, and possible use of this ant as a biocontrol agent for the apple snail is considered.
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Evolutionary and functional significance of lengthy copulations in a promiscuous apple snail, Pomacea canaliculata (Caenogastropoda: Ampullariidae)
TL;DR: The field results indicate that lengthy copulations previously reported for P. canaliculata were not an artefact and that there was no effect of male size, the time at which copulation began, the mating status of snails or of the presence of prowler males on the duration of copulation.
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Influence of common carp on apple snail in a rice field evaluated by a predator - prey logistic model
TL;DR: The study predicts that a snail population would be eliminated in 2 years at a stocking density of 2000 carp hectare−1, if no immigration of the snail occurred, together with other reports on snail longevity.
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Influence of age and body size on alarm responses in a freshwater snail Pomacea canaliculata
TL;DR: Responses to the hypothesis that size selection of prey by predators elicits size-specific responses from prey were examined in the context of the evolution of the snail's avoidance behavior in response to the size-dependent prey choice by the predator.