Cricket Life Cycles

Shimizu, Masaki; Walker, Thomas J.

doi:10.1007/978-1-4615-6986-2_11

Cited by 129 publications

(113 citation statements)

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“…The late photoperiod individuals took on average 1-day longer to reach maturity, but attained a bigger size at maturity. This result is consistent with the notion of a change of voltinism along an environmental gradient, reflected in a saw tooth pattern of development and hence body size (Masaki and Walker, 1987).…”

Section: Discussionsupporting

confidence: 91%

Quantitative genetics of immunity and life history under different photoperiods

et al. 2011

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Insects with complex life-cycles should optimize age and size at maturity during larval development. When inhabiting seasonal environments, organisms have limited reproductive periods and face fundamental decisions: individuals that reach maturity late in season have to either reproduce at a small size or increase their growth rates. Increasing growth rates is costly in insects because of higher juvenile mortality, decreased adult survival or increased susceptibility to parasitism by bacteria and viruses via compromised immune function. Environmental changes such as seasonality can also alter the quantitative genetic architecture. Here, we explore the quantitative genetics of life history and immunity traits under two experimentally induced seasonal environments in the cricket Gryllus bimaculatus. Seasonality affected the life history but not the immune phenotypes. Individuals under decreasing day length developed slower and grew to a bigger size. We found ample additive genetic variance and heritability for components of immunity (haemocyte densities, proPhenoloxidase activity, resistance against Serratia marcescens), and for the life history traits, age and size at maturity. Despite genetic covariance among traits, the structure of G was inconsistent with genetically based trade-off between life history and immune traits (for example, a strong positive genetic correlation between growth rate and haemocyte density was estimated). However, conditional evolvabilities support the idea that genetic covariance structure limits the capacity of individual traits to evolve independently. We found no evidence for GÂE interactions arising from the experimentally induced seasonality.

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Section: Discussionsupporting

confidence: 91%

Quantitative genetics of immunity and life history under different photoperiods

et al. 2011

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“…Our estimation of the proportion of diapausing individuals in the laboratory is in agreement with the experiments of Alexander and Bigelow (1960) who found that, in similar laboratory conditions, approximately 25% of the individuals entered diapause. The relatively low proportion of diapausers in the laboratory suggests that these conditions did not correspond to the environmental cues that G. veletis individuals need to enter diapause, these conditions being, among others, a decreasing and\or shorter photoperiod (Tanaka, 1978;Tauber et al, 1986;Masaki and Walker, 1987). All three aforementioned lines of evidence clearly indicate that growth, wing morphology and diapause occurrence are all highly plastic traits in G. veletis.…”

Section: Comparison Of Laboratory Reared and Field Caught Cricketsmentioning

confidence: 99%

The common quantitative genetic basis of wing morphology and diapause occurrence in the cricket Gryllus veletis

Bégin

Roff

2002

Heredity

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A covariation between wing morphology and diapause occurrence has been observed in many insect species, but the genetic basis of this covariation has never been established. This study measures the heritability of, and genetic correlation between, these two ecologically important threshold traits in the cricket Gryllus veletis. A total of 81 fullsib families were reared in the laboratory to estimate these parameters. A comparison of laboratory and field samples showed that these two traits are highly plastic. The heritability of wing morphology was 0.25 (0.09), the heritability of diapause occurrence was 0.77 (0.11) and the genetic correlation between them was 0.61 (0.19). These estimates did

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“…Nine different patterns of life cycles are known in crickets (MASAKI & WALKER, 1987;WALKER & MASAKI, 1989). These patterns are primarily characterized by the presence of photoperiodically and thermally controled diapause and developmental responses (heterodynamic) or by the absence of such responses (homodynamic) (MASAKI, 1996).…”

mentioning

confidence: 99%

“…Such life cycles are restricted to tropical and subtropical latitudes in which information concerning the life cycle of crickets is scarce. Heterodynamic life cycles are characterized by populations that have their growth and reproduction adjusted to the year's seasons (MASAKI & WALKER, 1987).…”

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confidence: 99%

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Seasonal life cycle of the tropical cricket Eneoptera surinamensis (Orthoptera, Gryllidae, Eneopterinae)

Zefa

Rúbio

Rinaldi

et al. 2006

Iheringia, Sér. Zool.

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ABSTRACT. The life cycle and seasonal distribution of a tropical population of Eneoptera surinamensis (De Geer, 1773) were analyzed aiming to verify whether this species life cycle is associated to the wet and dry seasons. The population studied was found at the Seasonal Alluvial Semi-deciduous Forest, Foz de Iguaçu, PR, Brazil (25º27'54.9'' S; 54º34'27.9'' W), which presents mild mesothermal and super humid climate. Field observations were made at 20-to 24-day intervals, with the first observation occurring on April 30 th , 2002 and the last on April 25 th , 2003. It was verified that the studied species is univoltine and cyclic with regards to the dry and wet seasons, therefore being heterodynamic and surviving the dry season as adult.

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Cricket Life Cycles

Cited by 129 publications

References 100 publications

Quantitative genetics of immunity and life history under different photoperiods

Quantitative genetics of immunity and life history under different photoperiods

The common quantitative genetic basis of wing morphology and diapause occurrence in the cricket Gryllus veletis

Seasonal life cycle of the tropical cricket Eneoptera surinamensis (Orthoptera, Gryllidae, Eneopterinae)

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