Abstract
The cabbage beetle, Colaphellus bowringi Baly undergoes an imaginal summer and winter diapause in the soil; adult emergence is spread over several months to more than 2 years, with prolonged diapause occurring in certain adults under natural conditions. The relationship between natural duration of diapause and postdiapause reproduction was investigated at 25°C under 12L: 12D photoperiod. The mean body weight of postdiapause adults with the long diapause duration of 21 months was significantly greater than with the shorter diapause duration of 5, 11 and 17 months. The longevity and mean total egg production of the postdia- pause adult females with the long diapause duration of 21 months was significantly greater than that of postdiapause females with shorter diapause duration of 5, 11 and 17 months. All results demonstrate that extended diapause is associated with a high level of postdiapause reproductive performance. There is no negative trade off between diapause duration and the post-diapause reproductive traits that we measured in C. bowringi.
Highlights
Diapause allows insects to temporally avoid unfavorable conditions, such as hostile climatic conditions, insufficient or low quality food resources and risks imposed by natural enemies (Tauber et al, 1986; Danks, 1987)
The aim of this study is to examine whether a long-term diapause results in the deleterious effects on postdiapause longevity and fecundity in the Tai-An population of C. bowringi
High body weight in long diapausing individuals is clearly an adaptive strategy in C. bowringi, because it deals with the energetic demands of the diapause period and ensures high fecundity after a long diapause period
Summary
Diapause allows insects to temporally avoid unfavorable conditions, such as hostile climatic conditions, insufficient or low quality food resources and risks imposed by natural enemies (Tauber et al, 1986; Danks, 1987). Costs of diapause are commonly reflected in lower post-diapause survival and reduced fecundity (Denlinger, 1981; Bradshaw et al, 1998; Han & Bauce, 1998; Kroon & Veendaal, 1998; Ellers & van Alphen, 2002; Williams et al, 2003; Munyiri et al, 2004; Matsuo, 2006; Ito, 2007). The two most likely physiological mechanisms underlying these costs are damage due to diapause-associated stresses, such as desiccation or cold shock, and the depletion of metabolic reserves that could contribute to a decrease in postdiapause fitness (Hahn & Denlinger, 2007). The presence of a diapause switch mechanism itself was associated with a reproductive “cost”, i.e., a lengthened non-diapause preoviposition period (Tauber & Tauber, 1992). Wherein the diapause program includes greater body size and metabolic reserves, diapause has been associated with increased reproductive capacity (Saringer & Szentkiralyi, 1980; Spence, 1989; Fantinou et al, 2004; Wang et al, 2006)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
