Evolutionary mechanisms for camouflage in Cladomorphus phyllinus (Phasmatodea): A reflection on the role of evidence for hypotheses proposition

Forero, Dimitri; Campos, Luiz Alexandre; Castro‐Huertas, Valentina; Bianchi, Filipe Michels

doi:10.1590/0001-3765202020200197

Cited by 1 publication

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References 34 publications

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“…5,6 Cladomorphus phyllinus is polyphagous and widely distributed throughout northeast of Argentina, southern Amazon, eastern Brazil including Mata Atlântica and nearby regions. 5,7,8 For construction of the cohort life table or dynamic life table is necessary the number of individuals in every age group, the probability of survival and fertility rate. The life table expresses the interaction between individuals and their environment by providing change information on population size, essential for understanding the population dynamics.…”

Section: Introductionmentioning

confidence: 99%

Population parameters and dynamic life table of stick-insect Cladomorphus phyllinus Gray, 1835 (Phasmatidae, Cladomorphinae)

Pelli,

Pimenta,

Pelli

2023

MOJES

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The Phasmatodea Order is represented by terrestrial insects, phytophagous and wide distribution. About 200 species have been described in Brazil as Cladomorphus phyllinus. The aim of this study was to describe the biology as well as measure population parameters. The specimens were kept in cages with temperature and natural photoperiod. We used 22 animals that were fed with leaves of guava, Psidium guajava Linnaeus. For the construction of the dynamic life table, the following parameters were used: specific survival by age group; survivorship or survival compared to live-born animals; specific fertility by age group; specific mortality by age group and life expectancy. Initially, the cohort of animals was monitored weekly, for a total period of 55 weeks. However, to facilitate data tabulation, they were grouped into age groups. The cohort was then divided into 11 periods of 35 days each; thus totaling 385 days. The survival curve, constructed with the survivorship data, indicate to a curve of type II, where the mortality rate is relatively constant throughout life. The animals began to lay eggs at the 23rd week. The period with the highest fecundity was t5 with 93 eggs per female. With the life table, the population projection was performed in future time intervals. In the time t = 291, the λ value stabilizes at 2.0747 and the population reaches stable age distribution. The data indicate high biotic potential for the species, in contrast to the density of data in the field, when the group is usually found in low densities, probably indicating low effectiveness of camouflage combined with the fragility of the animals against environmental adversities.

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