Effect of Rearing Temperature on Mortality, Second-generation Emergence, and Size of Adult in Megachile rotundata (Hymenoptera: Megachilidae)

Tepedino, Vincent J.; Parker, Frank D.

doi:10.1093/jee/79.4.974

Cited by 41 publications

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“…Since in beewolves the amount of larval food is fixed, a presumed increase in gross conversion efficiency at higher temperatures would cause an increased body size. Similarly, in Megachile rotundata, a solitary bee that also provisions brood cells with a fixed amount of food, higher developmental temperatures resulted in larger adults (Tepedino and Parker 1986). Thus, the constraint on larval growth caused by the limitation of available food might solve the putative difference between beewolves (and mass-provisioning species in general) and herbivorous insects.…”

Section: Discussionmentioning

confidence: 99%

Factors affecting body size and fat content in a digger wasp

Strohm¹

2000

Oecologia

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Body size is one of the most important life history traits. In mass-provisioning solitary Hymenoptera, the maximum attainable adult size is not under the control of the larva but is limited by the amount of resources provided by the mother. I investigated the effect of the amount of different maternal resources and potentially interfering abiotic (temperature) and biotic (fungus infestation) factors on offspring body size and fat reserves in a solitary digger wasp, the European beewolf, Philanthus triangulum F. (Hymenoptera, Sphecidae). Females provide different resources for their progeny that might influence progeny size (egg, brood cell, and paralysed honey-bees as food). The number of bees provisioned explained the largest proportion of variation in cocoon length. With an increasing number of bees (one to four), progeny gained less weight per bee. Relative fat content increased with size. With a given number of bees, males were smaller than females. The duration of the feeding period was independent of the number of bees in a brood cell but decreased with increasing ambient temperatures (20, 25, 30°C). Cocoon size was influenced by temperature but the effect was not uniform. Cocoons from brood cells containing two and three bees were larger at 25°C than at 20°C; those at 30°C did not differ from those at either lower temperature. However, in brood cells containing one bee, cocoon length was independent of temperature. Sublethal levels of fungus infestation may have a small negative effect on cocoon size. Different temperatures during hibernation (8 vs 13°C) did not affect the size or fat content of emerging adults. These results on a mass-provisioning hunting wasp are compared with the well-studied herbivorous insects.

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Section: Discussionmentioning

confidence: 99%

Factors affecting body size and fat content in a digger wasp

Strohm¹

2000

Oecologia

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“…Second, emerging bees destroy some of their nonemergent siblings when they leave the nest (Tepedino & Frohlich 1984). Although some workers report success in reducing secondgeneration emergence in Canada through appropriate temperature treatments of immature stages (Richards 1984), others find voltinism of immatures unresponsive to temperature or photoperiodic treatments (Johansen & Eves 1973, Tasei 1975, Bitner 1976, Tasei & Masure 1978, Parker & Tepedino 1982, Tepedino & Parker 1986). Present evidence suggests that diapause is maternally controlled.…”

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confidence: 99%

Alternation of Sex Ratio in a Partially Bivoltine Bee, Megachile rotundata (Hymenoptera: Megachilidae)

Tepedino¹,

Parker²

1988

Annals of the Entomological Society of America

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“…Therefore, the balance between economy and robustness of cocoons is important for cocoon-spinning insects. To date, only the cocoon weights of a few insects, such as silkworms and bees, have been investigated (Wightman & Rogers, 1978;Tripathi & Singh, 1983;Parker, 1984;Tepedino & Parker, 1986;Dash et al, 1992;Bosch & Vicens, 2002), and no silk investment data are reported for parasitic wasps.…”

Section: Discussionmentioning

confidence: 99%

Investment in cocoon-silk and structure of the clusters of cocoons produced by gregarious microgastrine wasps (Hymenoptera: Braconidae)

Tagawa¹,

Sato²

2009

Eur. J. Entomol.

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Abstract. After leaving their hosts, the larvae of endoparasitic braconid wasps pupate in cocoons. To determine their investment in cocoon silk, the dry weight of newly emerged wasps and that of the empty cocoons were measured for three gregarious braconid species of slightly different sizes: Glyptapanteles liparidis (Bouché), Cotesia glomerata (L.) and Cotesia kariyai (Watanabe) (Hymenoptera: Braconidae, Microgastrinae). These braconids form clusters of cocoons of different types. Glyptapanteles liparidis is significantly larger than either of the Cotesia species, and C. kariyai is the smallest. The ratio of the weight of cocoon silk to the total weight of cocoon silk, wasp body, cast cuticle and meconium is smaller for small species than large species. Small species economise on their use of silk by aggregating cocoons and can therefore invest a larger fraction of their resources in adult body mass. Moreover, the larvae of the smallest species, C. kariyai, additionally reduce their use of silk by constructing a communal airy silk layer beneath which the individual cocoons are formed.

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Effect of Rearing Temperature on Mortality, Second-generation Emergence, and Size of Adult in Megachile rotundata (Hymenoptera: Megachilidae)

Cited by 41 publications

References 0 publications

Factors affecting body size and fat content in a digger wasp

Factors affecting body size and fat content in a digger wasp

Alternation of Sex Ratio in a Partially Bivoltine Bee, Megachile rotundata (Hymenoptera: Megachilidae)

Investment in cocoon-silk and structure of the clusters of cocoons produced by gregarious microgastrine wasps (Hymenoptera: Braconidae)

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