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|Título:||Temperature and light intensity affecting egg production and growth performance of the Apple Snail Pomacea patula [Baker, 1922]|
|Editorial:||Universidad de Colima|
|Descripción:||Outdoor experiments recording spawning of apple snails [Pomacea patula Baker, 1922] were recorded during one year. Observations included spawning of 30 females with total deposited eggs and total hatched snails, all done in triplicate. Another series of indoor trials with 30 spawning snails and egg masses under controlled experimental conditions (temperature and light intensity) were recorded by triplicate. Data were compared at different water/air temperatures, 20 to 32°C and two light intensities, 60 and 300 lux at spawning places. A third series of trials were aimed at determining growth performance with 100 spawned sails per temperature trial under controlled temperatures (22-32°C) and natural light conditions. The results show that the apple snails spawn mainly from August to November when water temperatures average 26°C or more. Hatching efficiency is encouraged by warm air temperatures. Spawning is also affected by light intensity, females spawn at lower temperatures in higher intense illuminated places; at 26°C or higher, the preference reverts. In tropical climate incubation time of larvae reduces and the growth of recently hatched snails tends to be more successful in warm weather, but their final survival decreases|
|Aparece en las Colecciones:||Avances en Investigación Agropecuaria|
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