The characteristics of lifespan in Cheyletidae and its response to environmental factors

Zoosymposia ◽  
2021 ◽  
Vol 20 ◽  
Author(s):  
ZEHUI ZHENG ◽  
BIN XIA
Keyword(s):  
Life History ◽  
Environmental Factors ◽  
Sex Difference ◽  
Growth And Development ◽  
Development Time ◽  
Abiotic Factors ◽  
Biotic And Abiotic Factors ◽  
The Family ◽  
Difference Temperature

This paper provides a survey of a collection of references on life history studies of eight species in the family Cheyletidae. It reviews some factors (including sex difference, temperature, humidity and prey) that affect the development time and lifespan in Cheyletidae. This paper also analyzes the effects these biotic and abiotic factors on the growth and development of cheyletid mites.

scholarly journals Relative effects of biotic and abiotic factors during early life history on recruitment dynamics: a case study

2017 ◽  
Vol 74 (7) ◽  
pp. 1125-1134 ◽  
Author(s):  
Fan Zhang ◽  
Kevin B. Reid ◽  
Thomas D. Nudds
Keyword(s):  
Life History ◽  
Yellow Perch ◽  
Lake Erie ◽  
Abiotic Factors ◽  
Zooplankton Abundance ◽  
Biotic Factors ◽  
Large Lakes ◽  
Middle Term ◽  
Biotic And Abiotic Factors ◽  
Juvenile Stages

The relative effects of biotic and abiotic factors, and the life-history stages upon which they act to affect fish recruitment, vary among species and ecosystems. We compared the effects of spawning stock biomass, and factors operating at early-term (encompassing the egg, yolk-sac larval, and first few days of swim-up larval stages), middle-term (including the swim-up larval and pelagic juvenile stages), and late-term (over the benthic juvenile stage) on recruitment by yellow perch (Perca flavescens) in the western basin of Lake Erie between 1999 and 2013. Variation of recruitment was mainly driven by middle-term effects. Then, abiotic factors, such as warming rate and wind speed, more strongly affected recruitment than did biotic factors. Among middle-term biotic factors, the top-down effect of yearling walleye (Sander vitreus) abundance was stronger than the bottom-up effect of zooplankton abundance. Similar to marine species, physical processes appear to strongly affect recruitment dynamics of Lake Erie yellow perch over its pelagic larval and juvenile stages, demonstrating the importance of physical and biological processes in understanding fish population dynamics in large lakes.

scholarly journals Relationship between childhood (un)predictability and life milestones in young Brazilians

2017 ◽  
Vol 11 (1) ◽  
pp. 92-101
Author(s):  
Cézar Donizetti Luquine Júnior ◽  
Anna Beatriz Carnielli Howat-Rodrigues ◽  
Patrícia Izar
Keyword(s):  
Life History ◽  
Environmental Factors ◽  
Life History Strategies ◽  
Data Support ◽  
Childhood Environment ◽  
First Child ◽  
The Family ◽  
Formal Employment

The present study sought to investigate whether perceived family unpredictability affects the development of life history strategies in both the reproductive and somatic domains by evaluating the ages at which life milestones occurred. In this study 211 young Brazilians answered a 10-item instrument that contained future milestones, the Family Unpredictability in Childhood, and a sociodemographic questionnaire. Not all participants had already achieved the milestones. Earlier ages of giving birth to the first child, marrying, starting a family, and at first formal employment were correlated with greater unpredictability scores. Significant correlations were found more frequently for the participants who had already met the milestones. Data support the importance of the childhood environment for later development. Results suggest that data obtained based on the ages at which milestones occurred and ages at which milestones are expected to occur may present important differences with regard to the influence of environmental factors.

scholarly journals Relative clutch mass of Basiliscus vittatus Wiegmann, 1828 (Squamata, Corytophanidae): female morphological constraints

Herpetozoa ◽  
2019 ◽  
Vol 32 ◽  
pp. 211-219
Author(s):  
Gabriel Suárez-Varón ◽  
Orlando Suárez-Rodríguez ◽  
Gisela Granados-González ◽  
Maricela Villagrán-Santa Cruz ◽  
Kevin M. Gribbins ◽  
...  
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Abiotic Factors ◽  
Reproductive Traits ◽  
The Family ◽  
In Captivity ◽  
Abiotic And Biotic Factors ◽  
Gravid Females ◽  
Favorable Conditions ◽  
Clutch Mass

Clutch size (CS) and relative clutch mass (RCM) are considered important features in life history descriptions of species within Squamata. Variations in these two characteristics are caused by both biotic and abiotic factors. The present study provides the first account related to CS and RCM ofBasiliscus vittatusin Mexico within a population that inhabits an open riverbed juxtapositioned to tropical rainforest habitat in Catemaco, Veracruz, Mexico (170 m a.s.l.). Twenty-nine gravid females were collected and kept in captivity under favorable conditions that promote oviposition. The CS within this population was 6.2 ± 0.2 and was correlated positively with snout vent-length (SVL); while the RCM was 0.17 ± 0.006 and was correlated positively with both CS and width of egg. Factors, such as female morphology and environmental conditions, should influence these reproductive traits inB. vittatus. The data collected in this study could provide a framework for comparisons of the life history traits across populations ofB. vittatusin Mexico and within other species of the family Corytophanidae and provide a model for testing how abiotic and biotic factors may influence the CS and RCM in basilisk lizards throughout their range.

Differences in population parameters of Rattus norvegicus in urban and rural habitats of central Argentina

Mammalia ◽  
2013 ◽  
Vol 77 (2) ◽  
Author(s):  
Isabel E. Gómez Villafañe ◽  
Regino Cavia ◽  
María Victoria Vadell ◽  
Olga V. Suárez ◽  
María Busch
Keyword(s):  
Life History ◽  
Rattus Norvegicus ◽  
Abiotic Factors ◽  
Life History Strategies ◽  
Population Parameters ◽  
Biotic And Abiotic Factors ◽  
Central Argentina ◽  
Life History Characteristics

AbstractLife history characteristics are influenced by both biotic and abiotic factors of the environment. The aim of this study was to compare the life history strategies of

Potential, realized, and actual fecundity in the crayfish Orconectes immunis from southwestern Ontario

1995 ◽  
Vol 73 (4) ◽  
pp. 672-677 ◽  
Author(s):  
Daniel P. M. Stechey ◽  
Keith M. Somers
Keyword(s):  
Life History ◽  
Abiotic Factors ◽  
Stage Iv ◽  
Reproductive Stage ◽  
Analysis Of Covariance ◽  
Biotic And Abiotic Factors ◽  
Reproductive Losses

Data on crayfish life history are limited to a few populations of only a few species. Herein we examine the size-specific fecundity of a population of Orconectes immunis from southwestern Ontario. We compare log–log regressions of ovarian egg counts, abdominal egg counts, and the number of independent stage IV juveniles with the size of females to estimate reproductive losses associated with egg extrusion and hatching. We contrast these results with data from a Michigan population. Slopes of the three allometric regressions for the Ontario population were significantly greater than zero (P < 0.05); however, the slope for the ovarian egg counts was significantly less than the hypothesized value of 3.0 (P < 0.05), suggesting that ovarian egg counts did not scale volumetrically with size of females. An analysis of covariance indicated that the slope for the ovarian egg counts differed significantly from the slopes for abdominal egg counts and the number of juveniles (P < 0.05), but the latter two regressions were parallel. The proportional decline in fecundity between ovarian and abdominal egg counts could not be estimated unequivocally because the slopes differed. By contrast, the Michigan population exhibited a 35% decline between these stages. A comparison of size-adjusted abdominal egg counts and the number of juveniles revealed a decline of 58% for the Ontario population. The observed differences in size-specific fecundity at each reproductive stage support the hypothesis that each of these parameters summarizes distinct life-history features. The roles of biotic and abiotic factors on crayfish life history warrant further study.

scholarly journals Interpopulation Plasticity in a Darkling Beetle Life-History along a Whole Oceanic Island Altitudinal Gradient

Insects ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1137
Author(s):  
Heriberto López ◽  
Sandra Hervías-Parejo ◽  
Elena Morales ◽  
Salvador De La Cruz ◽  
Manuel Nogales
Keyword(s):  
Life History ◽  
Body Size ◽  
Environmental Factors ◽  
Altitudinal Gradient ◽  
Abiotic Factors ◽  
Phenotypic Expression ◽  
Oceanic Islands ◽  
The Body ◽  
Reproductive Phenology ◽  
Darkling Beetle

Insects show remarkable phenotypic plasticity in response to changing environmental conditions. The abiotic factors that determine their phenotypes often vary in time and space, and oceanic islands harbour ideal environments for testing predictions on this matter. The ubiquitous beetle Pimelia laevigata costipennis Wollaston, 1864 (Tenebrionidae) is distributed over the entire altitudinal gradient of the island El Hierro (Canary archipelago), from 0 to 1501 m above sea level. Here, we examine how environmental factors (i.e., rainfall and temperature), associated with the altitudinal gradient, affect the body size, reproductive phenology, clutch size and egg volume, and population dynamics of this ectothermic flightless insect. Pimelia l. costipennis populations inhabiting upland localities, typified by lower temperatures, and greater precipitation and vegetation cover, were larger in body size and laid larger clutches with smaller eggs than those in the lowlands. Moreover, reproduction occurred earlier in the year at lower sites and later at higher sites, whereas activity density was highest in the uplands where it increases with temperature. This study first explores the changes in life history patterns along a whole insular altitudinal gradient, and finds interpopulation plasticity. It confirms that environmental factors associated with species spatial distribution act additively as drivers of phenological and phenotypic expression.

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