Egg Load as a Major Source of Variability in Insect Foraging and Oviposition Behavior

Minkenberg, O.P.J.M.; Tatar, Marc; Rosenheim, Jay A.

doi:10.2307/3544896

Cited by 256 publications

(197 citation statements)

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“…ROSENHEIM & ROSEN (1991) also observed that in the A. lingnanensis parasitoid, the females with larger loads of eggs laid larger aggregates. Those observations are also in agreement with MINKENBERG et al (1992) and ALUJA et al (2001) that also observed that the load of eggs influences the size of the female aggregate at 26° C temperature and 59-72 % R. H.…”

Section: Behaviorsupporting

confidence: 80%

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Oviposition behavior of wild Zabrotes subfasciatus (Coleoptera, Chrysomelidae) females deprived of the host Phaseolus vulgaris (Fabaceae)

Sperandio

Zucoloto

2009

Iheringia, Sér. Zool.

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Oviposition behavior of wild Zabrotes subfasciatus (Coleoptera, Chrysomelidae) females deprived of the host Phaseolus vulgaris (Fabaceae)LuizaABSTRACT. The insects oviposition behavior is fundamental to study population dynamics, life history evolution, insect-plant and parasitoid-host interactions. Zabrotes subfasciatus (Boheman, 1833) females oviposition behavior in the presence and absence of a host is unknown. The main objective of this study was to describe in detail the oviposition behavior of host deprived or non-deprived females, and observe how the several situations of deprivation (days without host) influence oviposition. Six groups were assembled, three deprived of the host (for 2, 5 and 8 days) and three control groups (with host), each containing one newly-emerged couple (0-24h) of wild Z. subfasciatus, The non-deprived (control) groups received the hosts every day (5 bean seeds Phaseolus vulgaris (Fabaceae)) and the others were deprived for 2, 5 and 8 days, respectively. For each group 12 repetitions were made. Consequently, 12 couples were host deprived during two days, 12 couples were host deprived during five days and 12 couples were host deprived during eight days. When the seeds of the deprived groups were added the experiments started. There was a control group for each deprived group. The experiments and the insects were maintained at constant temperature 29 ± 2°C and 70-80% relative humidity. At 15 minutes interval, the number of times the females manifested the different categories of behavior was observed (frequency). The behavior categories were: rest inside the box, locomotion, resource exploration (seeds), copulation and oviposition. The deprived females stayed most of the time in contact with the host to carry out oviposition, while the non-deprived (control) females spent most of the time at rest. This was observed in all the deprivation times. The results show that host deprivation influences the oviposition behavior of the studied species and also shows the flexibility in the oviposition strategies that these females present when the environment changes (absence and presence of resources). KEYWORDS. Host deprivation, oviposition behavior, Bruchinae. RESUMO. Comportamento de ovoposição de fêmeas selvagens de Zabrotes subfasciatus (Coleoptera, Chrysomelidae) privadas do hospedeiro Phaseolus vulgaris (Fabaceae). O comportamento de oviposição de insetos é fundamental em pesquisas de dinâmica populacional, evolução da história de vida, interações inseto-planta e parasitóide-hospedeiro. O comportamento de oviposição de fêmeas deZabrotes subfasciatus (Boheman, 1833) na presença e ausência de hospedeiro é desconhecido. O principal objetivo deste trabalho foi verificar de que modo as várias situações de privação temporária de hospedeiro influenciam a oviposição. Foram montados 6 grupos, sendo 3 privados de hospedeiro (por 2, 5 e 8 dias) e 3 controles (com hospedeiro), cada um contendo um casal recém-emergido (0-24 h) de Z. subfasciatus selvagem. Apenas os grupos controles receberam os hosp...

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Section: Behaviorsupporting

confidence: 80%

“…Pro-ovigenic insects as Z. subfasciatus emerge with all eggs mature (MINKENBERG et al, 1992). Host deprivation immediately after adult emergence has different consequences for pro-ovigenic and synovigenic species because egg resorption might occur during the period of host deprivation (FLEURY & BOULÉTREAU, 1993).…”

mentioning

confidence: 99%

Oviposition behavior of wild Zabrotes subfasciatus (Coleoptera, Chrysomelidae) females deprived of the host Phaseolus vulgaris (Fabaceae)

Sperandio

Zucoloto

2009

Iheringia, Sér. Zool.

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“…A limited egg-load may be a factor influencing a female's searching intensity, oviposition rate and host acceptance (Minkenberg et al 1992), but this could not have been of influence in our study as of all stages a surplus of hosts was offered. In our experimental conditions an egg-limited parasitoid, as is the case for E. tricolor, should maximize the quality of hosts to be parasitized and a long time is expected to select it.…”

Section: Searching and Parasitization Behaviour Of E Tricolormentioning

confidence: 66%

Hyperparasitism behaviour of the autoparasitoid Encarsia tricolor on two secondary host species

et al. 2008

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Hyperparasitism by virgin female Encarsia tricolor was studied by direct observation of its behaviour when contacting two secondary host species (Encarsia formosa and E. tricolor) at different host stages (first and second larval stage, third larval stage, and pupal stage). The searching and hyperparasitism behavioural sequence of E. tricolor was independent of the host stage of the whitefly (Aleyrodes proletella), and was similar to several related primary parasitoid species. In experiments with equal numbers of secondary hosts, encounter frequencies were equal for both secondary host species in all developmental stages observed.However, rates of hyperparastism were different according to host stage and host species. Hosts in the late larval stages were most preferred for hyperparasitization and the heterospecific E. formosa was more preferred as a secondary host than the conspecific, E. tricolor, in particular from the prepupal stage onwards. The window of vulnerability, i.e., the duration of the period in which a secondary host is susceptible to hyperparasitism, was largely determined by the occurrence and rate of melanization after the onset of pupation. The duration of a successful hyperparasitization event was longer than one that failed. Superparasitism occurred only once in all cases. The potential effect of autoparasitoids on biological control programs and the consequences for selection and release of an effective, yet ecologically safe agent are discussed.

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“…Hence, a more direct method of assessment is probable. One possibility is that foundresses use information from physiological processes related to the number of eggs yet to be deposited (their 'egg load'), a cue hypothesized to be important in many aspects of insect oviposition behaviour (see Minkenberg et al 1992;Hempel et al 1998). If this is true in L. tentacularis, though, foundresses must also be able to 'reset the clock' after their first clutch: they begin their second clutch by depositing mostly male eggs again (see Gibernau et al 1996 for indirect evidence of similar behaviour in the fig wasp Blastophaga psenes).…”

Section: Discussionmentioning

confidence: 99%

The mechanism of sex ratio adjustment in a pollinating fig wasp

et al. 2008

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Sex ratio strategies in species subject to local mate competition (LMC), and in particular their fit to quantitative theoretical predictions, provide insight into constraints upon adaptation. Pollinating fig wasps are widely used in such studies because their ecology resembles theory assumptions, but the cues used by foundresses to assess potential LMC have not previously been determined. We show that Liporrhopalum tentacularis females (foundresses) use their clutch size as a cue. First, we make use of species ecology (foundresses lay multiple clutches, with second clutches smaller than first) to show that increases in sex ratio in multi-foundress figs occur only when foundresses are oviposition site limited, i.e. that there is no direct response to foundress density. Second, we introduce a novel technique to quantify foundress oviposition sequences and show, consistent with the theoretical predictions concerning clutch size-only strategies, that they produce mainly male offspring at the start of bouts, followed by mostly females interspersed by a few males. We then discuss the implications of our findings for our understanding of the limits of the ability of natural selection to produce 'perfect' organisms, and for our understanding of when different cue use patterns evolve.

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Egg Load as a Major Source of Variability in Insect Foraging and Oviposition Behavior

Cited by 256 publications

References 63 publications

Oviposition behavior of wild Zabrotes subfasciatus (Coleoptera, Chrysomelidae) females deprived of the host Phaseolus vulgaris (Fabaceae)

Oviposition behavior of wild Zabrotes subfasciatus (Coleoptera, Chrysomelidae) females deprived of the host Phaseolus vulgaris (Fabaceae)

Hyperparasitism behaviour of the autoparasitoid Encarsia tricolor on two secondary host species

The mechanism of sex ratio adjustment in a pollinating fig wasp

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