Modeling the thermal growth coefficient in the shrimp Penaeus vannamei in Ecuador with different feeding systems

Authors

Miguel Jover Cerdá Universitat Politècnica Valencia
Juan Carlos Valle Masson Universitat Politècnica de Valencia. Instituto de Ciencia y Tecnología Animal. Grupo de Acuicultura y Biodiversidad. Camino de Vera s/n 46022 Valencia (España)
Patricia Aguilar Astudillo Universitat Politècnica de Valencia. Instituto de Ciencia y Tecnología Animal. Grupo de Acuicultura y Biodiversidad. Camino de Vera s/n 46022 Valencia (España)
Ignacio Jauralde García Universitat Politècnica de Valencia. Instituto de Ciencia y Tecnología Animal. Grupo de Acuicultura y Biodiversidad. Camino de Vera s/n 46022 Valencia (España)

DOI:

https://doi.org/10.33936/at.v6i2.6689

Keywords:

manual feeding, time feeder, acoustic feeding

Abstract

The growth of 208 batches of shrimp was studied under commercial conditions in the Guayas area (Ecuador), fed manually by broadcast, with timed feeders and with hydrophones. Significant differences only appeared in the Specific Growth Rate (SGR) in favor of feeding with the hydrophones, but not in the Daily Growth (CD) or the Thermal Growth Coefficient (CTC). No significant differences appeared in the growth depending of the initial month of the batches, when they were analyzed by TCE or CD, but they did appear when the CTC was used, with the values being higher in June and July (with lower temperatures) compared to the January and February batches (with higher temperatures), which revealed a failure of the thermal growth model when temperatures were higher than 27 ºC. When a maximum effective temperature limit of 26 ºC was applied, the differences disappeared, which suggests its inclusion in CTC model for shrimp.

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