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Antipredator behavior of the new mass-reared unisexual strain of the Mexican Fruit Fly

Published online by Cambridge University Press:  07 December 2015

G. I. González-López
Affiliation:
Facultad de Ciencias Agrícolas, Universidad Veracruzana, Circuito Gonzalo Aguirre Beltrán S/N C. P. 91090, Xalapa, Veracruz, México Programa Moscafrut DGSV-SENASICA, Camino a los Cacahotales S/N, C. P. 30860, Metapa de Domínguez, Chiapas, México
D. Rao
Affiliation:
INBIOTECA, Universidad Veracruzana, Av. de las Culturas Veracruzanas, No.101, Col. E. Zapata, C.P. 91090, Xalapa, Veracruz, México
F. Díaz-Fleischer
Affiliation:
INBIOTECA, Universidad Veracruzana, Av. de las Culturas Veracruzanas, No.101, Col. E. Zapata, C.P. 91090, Xalapa, Veracruz, México
D. Orozco-Dávila
Affiliation:
Programa Moscafrut DGSV-SENASICA, Camino a los Cacahotales S/N, C. P. 30860, Metapa de Domínguez, Chiapas, México
D. Pérez-Staples*
Affiliation:
INBIOTECA, Universidad Veracruzana, Av. de las Culturas Veracruzanas, No.101, Col. E. Zapata, C.P. 91090, Xalapa, Veracruz, México
*
*Author for correspondence Phone: +52 228 8422700 ext 10851 Fax: +52 228 8422773 E-mail: diperez@uv.mx

Abstract

Tephritid pests controlled through the sterile insect technique (SIT) are mass-reared and subsequently released in affected areas. Several quality parameters are currently used to test adults, but none take into account interactions with a predator. When sterile males are released in the field, they will need to avoid predators until they reach sexual maturity and survive long enough to mate with wild females. Spiders are one of the most common predators that flies may encounter in release sites. In this study, we evaluated the antipredator behavior of a mass-reared sterile unisexual strain (‘Tapachula-7’) of the Mexican fruit fly Anastrepha ludens (Diptera: Tephritidae) against their spider predators. We sampled spiders in citrus trees to determine which families could be more common. We established the baseline activity rates of sterile Tapachula-7 (Tap-7) flies in comparison with wild flies. We also tested the behavior of the fertile and sterile bisexual strain and wild flies against hunting spiders (Family Salticidae) and orb building spiders (Family Tetragnathidae). We recorded 18 spider families, with Salticidae being the most dominant. Tap-7 flies diminished their activity in comparison with wild males at 1800 h but showed similar activity levels earlier in the day. When exposed to orb-web spiders (Leucauge venusta), Tap-7, fertile and sterile males from the bisexual strain had similar rates of survival, but Tap-7 males showed lower survival than wild males. Against hunting spiders (Phidippus audax), wild males had higher probability of defensive wing displays, but there was no difference in spider attack rates. In general, sterile Tap -7 males performed as well as males from the bisexual strain, although they had lower survival than wild males. This could be due to either mass-rearing and/or irradiation effects. We recommend the use of the defensive wing display behavior as a quality parameter and propose a rapid and effective method to evaluate fly activity. The efficiency of SIT will be improved if released sterile males have the same antipredator repertoire as their wild counterparts.

Type
Research Papers
Copyright
Copyright © Cambridge University Press 2015 

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