Reproductive pattern of the neotropical terrestrial isopod Benthana cairensis (Isopoda: Philosciidae)

Sokolowicz, Carolina C.; Araujo, Paula Beatriz

doi:10.1163/1937240x-00002126

Cited by 7 publications

(4 citation statements)

References 35 publications

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“…Both in the Béja and Chaambi populations, large females produce larger broods. The positive relationship between female size and fecundity is noted in several terrestrial isopod species [6,7,10,13,19,21,27]. However, the mean fecundity of P. variabilis showed seasonal intra and inter-population variability and was much lower in the population of Chaambi (51 ± 0.5 eggs) than in that of Béja (89.061 ± 2.325 eggs).…”

Section: Identification Life Span and Recruitment Of Cohortsmentioning

confidence: 99%

“…The search for a trade-off between different biological requirements such as age at first reproduction, fertility, survival and mortality should aim to optimize the selective value (fitness). For example, the brood size is positively correlated to the female body size [2][3][4][5][6][7][8][9][10]. In terrestrial isopods, reproductive traits are often responsive to variation in numerous abiotic and biotic environmental factors [9] resulting in temporal coincidences of the release of offspring with favorable conditions for growth and survival [2].…”

Section: Introductionmentioning

confidence: 99%

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Reproductive traits of Porcellio variabilis Lucas, 1946 (Isopoda, Oniscidea) from Tunisia

2015

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Abstract:The breeding phenology and reproductive strategies of Porcellio variabilis were investigated, both in field and laboratory, in the population of Béja (North of Tunisia). P. variabilis Lucas, 1946 is characterized by a seasonal reproduction period followed by a sexual rest phase during November, December and January. Mean fecundity showed a great seasonal variation ranging between 29.612 eggs for females caught in the late summer, and 125.920 eggs for those collected in the spring. P. variabilis is an iteroparous species; females were able to produce one (95% of females), two (40% of females) or three broods (20% of females) during their reproduction period. The duration of the gestation period ranged from 34 days in the first brood to 14 days in the third one. Energy allocated to reproduction decreased from the first brood (26.29%) to the last one (4.618%). During the sampling period, eight cohorts were identified, each exhibiting a variable life span estimated around 6 months for cohorts born in early spring, and 12 months for those born in the fall. According to our present results and previous studies in another population of P. variabilis in Tunisia, we discuss factors of variability in breeding phenology in this species.

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Section: Identification Life Span and Recruitment Of Cohortsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reproductive traits of Porcellio variabilis Lucas, 1946 (Isopoda, Oniscidea) from Tunisia

2015

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“…Given the important role that females play in maintaining population stability and that their size is strongly related to fecundity Quadros et al, 2009;Sokolowicz & Araujo, 2013), this study suggests that the reproductive event is not negatively affected by human impact. In terms of percentage of ovigerous females, an overall comparison with the previous study demonstrates an IRM similarity in both populations, with peaks in different months.…”

Section: Discussionmentioning

confidence: 79%

Balloniscus glaber (Crustacea, Isopoda, Balloniscidae), a habitat specialist species in a disturbed area of Brazil

Kenne

Araujo

2015

Iheringia, Sér. Zool.

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ABSTRACT. Balloniscus glaber Araujo & Zardo, 1995 (Balloniscidae), a Neotropical Oniscidea, has been recorded historically in environments with low or no human interference. In one of these areas, it was determined as a K-strategist. Recently, however, this species was documented in a disturbed forest within urban limits. The present work revealed that the population in the urban area has high density, high number of ovigerous females and mancae in the population, a long reproductive period, and early sexual maturity. These results suggest that modified environments may provide favorable conditions and that the species is not negatively affected by human influence. KEYWORDS.Human interference, anthropogenic influence, population ecology, K-strategist, terrestrial isopods. RESUMO.Balloniscus glaber (Crustacea, Isopoda, Balloniscidae), uma espécie especialista de hábitat em uma área perturbada do Brasil. Balloniscus glaber Araujo & Zardo, 1995 (Balloniscidae), um oniscídeo Neotropical, tem sido registrado historicamente em ambientes com baixa ou sem interferência humana. Em uma dessas áreas, a espécie foi classificada como K-estrategista. No entanto, recentemente foi registrada em uma floresta perturbada dentro dos limites urbanos. O presente trabalho revela que a população na área urbana tem densidade alta, elevado número de fêmeas ovígeras e mancas, período reprodutivo longo e maturidade sexual precoce. Estes resultados sugerem que um ambiente modificado pode proporcionar condições favoráveis e que a espécie não é afetada negativamente pela influência humana.

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“…The Benthana species has a delicate, lighter and flexible cuticle, which can be highly affected by fluctuation in temperature and humidity and less tolerance to environmental changes, as described for another runner species, Atlantoscia floridana (Van Name, 1940) (Araujo and Bond-Buckup, 2005;Sokolowicz and Araujo, 2013;Wood et al, 2017, Csonka et al, 2018. The high permeability and thinnest cuticle compared to the species we tested in Each treatment corresponding to the number of nail polish external marks on animals' cuticle (zero -unmarked, one, two, three and four).…”

Section: External Marking Of Terrestrial Isopodsmentioning

confidence: 99%

External marking of terrestrial isopods (Isopoda, Oniscidea): efficiency of materials and influence on feeding behavior

2019

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Many monitoring studies use marking techniques to obtain dispersal data on individuals. Marking procedures may influence the vital activities of the terrestrial isopods, such as feeding behavior. The objective of this study was to identify the efficiency of different materials for external marking of woodlice and the influence on their feeding performance. Cyanoacrylate glue + glitter and nail polish were used as separate marking materials on three species: Balloniscus glaber, Benthana picta and Armadillidium vulgare. The material efficiency was compared using Kaplan-Meier curves and Log-Rank analysis. Individuals were fed with leaf discs of Machaerium stipitatum for feeding performance trials, and consumption rates were compared using ANOVA (α<0.05). There was no difference in durability between the materials used for external markings, except between marked and unmarked Benthana specimens when the observation period exceeded 15 days (Log-Rank=8.446, p=0.015). Nail polish was considered more suitable for feeding experiments. Statistical differences in consumption rates were observed only between the marked individual treatments of Benthana (ANOVA, F=7.5440, p=0.0002). These results indicate that external marking does not affect the feeding habits of the animals and suggest that this technique can be used to monitor dispersal of terrestrial isopods in field conditions for approximately 15 days.

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Reproductive pattern of the neotropical terrestrial isopod Benthana cairensis (Isopoda: Philosciidae)

Cited by 7 publications

References 35 publications

Reproductive traits of Porcellio variabilis Lucas, 1946 (Isopoda, Oniscidea) from Tunisia

Reproductive traits of Porcellio variabilis Lucas, 1946 (Isopoda, Oniscidea) from Tunisia

Balloniscus glaber (Crustacea, Isopoda, Balloniscidae), a habitat specialist species in a disturbed area of Brazil

External marking of terrestrial isopods (Isopoda, Oniscidea): efficiency of materials and influence on feeding behavior

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