Developmental polymorphism and the BrooksDyar law
Many protocols for research in insect biology and ecology require accurate determination of larval instar. The BrooksDyar Law (1886, 1890) states that the measurement of sclerotized structures follows a predictable regular geometric progression that can be used to determine accurately both larval i...
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Lenguaje:  Inglés (English) 
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Corporación colombiana de investigación agropecuaria
2019

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Acceso en línea:  http://hdl.handle.net/20.500.12324/35523 
id 
ir20.500.1232435523 

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dspace 
institution 
Agrosavia 
collection 
DSpace 
language 
Inglés (English) 
topic 
U10Métodos matemáticos y estadísticos Polimorfismo Larvas Insecta Factores ambientales 
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U10Métodos matemáticos y estadísticos Polimorfismo Larvas Insecta Factores ambientales Rivera, Fernando Vasquez, Diego Ruiz, Carolina GomezValderrama, Juliana BorreroEcheverry, Felipe Rincón, Diego Developmental polymorphism and the BrooksDyar law 
description 
Many protocols for research in insect biology and ecology require accurate determination of larval instar. The BrooksDyar Law (1886, 1890) states that the measurement of sclerotized structures follows a predictable regular geometric progression that can be used to determine accurately both larval instar of single larvae and the number of instars before pupation in a population. The BrooksDyar Law has been used extensively in studies of a number of holometabolous and hemimetabolous orders.
Although the BrooksDyar’s Law describes the variation in size among insect larvae as a function of development, the mathematical formula of the law has only been defined empirically, without any insights on the biological meaning of parameters (but see Hutchinson et al. [1997]). Moreover, the current definition assumes that insects go through a fixed number of instars before pupation, which is not always the case for many insect orders (Esperk et al. 2007).
Developmental polymorphism describes how environmental factors, such as food quality, can alter the development of certain species and vary the number of larval instars. Since developmental polymorphism seems to be common in insects (Etilé and Despland 2008), the BrooksDyar Law needs to be adjusted to account for epigenetic factors, such as food quality, which may affect the number of instars before pupation. Furthermore, a mechanistic mathematical definition of the BrookDyar’s law would be useful to more accurately describe the relative properties of a given epigenetic factor.
We used the fall armyworm (Spodoptera frugiperda) as a model to test if the BrooksDyar Law holds true for larvae reared on different natural and artificial diets. We studied whether the distance between frontal setae can be used as a reliable measurement for the application of the BrooksDyar Law. Finally, we propose a mathematical formula for the BrooksDyar’s law, which includes a constant and two parameters, all defined in light of food quality as a driving epigenetic factor 
format 
Otro (Other) 
author 
Rivera, Fernando Vasquez, Diego Ruiz, Carolina GomezValderrama, Juliana BorreroEcheverry, Felipe Rincón, Diego 
author_facet 
Rivera, Fernando Vasquez, Diego Ruiz, Carolina GomezValderrama, Juliana BorreroEcheverry, Felipe Rincón, Diego 
author_sort 
Rivera, Fernando 
title 
Developmental polymorphism and the BrooksDyar law 
title_short 
Developmental polymorphism and the BrooksDyar law 
title_full 
Developmental polymorphism and the BrooksDyar law 
title_fullStr 
Developmental polymorphism and the BrooksDyar law 
title_full_unstemmed 
Developmental polymorphism and the BrooksDyar law 
title_sort 
developmental polymorphism and the brooksdyar law 
publisher 
Corporación colombiana de investigación agropecuaria 
publishDate 
2019 
url 
http://hdl.handle.net/20.500.12324/35523 
_version_ 
1672080931441082368 
spelling 
ir20.500.123243552320200708T21:28:58Z Developmental polymorphism and the BrooksDyar law Developmental polymorphism and the BrooksDyar law Rivera, Fernando Vasquez, Diego Ruiz, Carolina GomezValderrama, Juliana BorreroEcheverry, Felipe Rincón, Diego U10Métodos matemáticos y estadísticos Polimorfismo Larvas Insecta Factores ambientales Many protocols for research in insect biology and ecology require accurate determination of larval instar. The BrooksDyar Law (1886, 1890) states that the measurement of sclerotized structures follows a predictable regular geometric progression that can be used to determine accurately both larval instar of single larvae and the number of instars before pupation in a population. The BrooksDyar Law has been used extensively in studies of a number of holometabolous and hemimetabolous orders. Although the BrooksDyar’s Law describes the variation in size among insect larvae as a function of development, the mathematical formula of the law has only been defined empirically, without any insights on the biological meaning of parameters (but see Hutchinson et al. [1997]). Moreover, the current definition assumes that insects go through a fixed number of instars before pupation, which is not always the case for many insect orders (Esperk et al. 2007). Developmental polymorphism describes how environmental factors, such as food quality, can alter the development of certain species and vary the number of larval instars. Since developmental polymorphism seems to be common in insects (Etilé and Despland 2008), the BrooksDyar Law needs to be adjusted to account for epigenetic factors, such as food quality, which may affect the number of instars before pupation. Furthermore, a mechanistic mathematical definition of the BrookDyar’s law would be useful to more accurately describe the relative properties of a given epigenetic factor. We used the fall armyworm (Spodoptera frugiperda) as a model to test if the BrooksDyar Law holds true for larvae reared on different natural and artificial diets. We studied whether the distance between frontal setae can be used as a reliable measurement for the application of the BrooksDyar Law. Finally, we propose a mathematical formula for the BrooksDyar’s law, which includes a constant and two parameters, all defined in light of food quality as a driving epigenetic factor Many protocols for research in insect biology and ecology require accurate determination of larval instar. The BrooksDyar Law (1886, 1890) states that the measurement of sclerotized structures follows a predictable regular geometric progression that can be used to determine accurately both larval instar of single larvae and the number of instars before pupation in a population. The BrooksDyar Law has been used extensively in studies of a number of holometabolous and hemimetabolous orders. Although the BrooksDyar’s Law describes the variation in size among insect larvae as a function of development, the mathematical formula of the law has only been defined empirically, without any insights on the biological meaning of parameters (but see Hutchinson et al. [1997]). Moreover, the current definition assumes that insects go through a fixed number of instars before pupation, which is not always the case for many insect orders (Esperk et al. 2007). Developmental polymorphism describes how environmental factors, such as food quality, can alter the development of certain species and vary the number of larval instars. Since developmental polymorphism seems to be common in insects (Etilé and Despland 2008), the BrooksDyar Law needs to be adjusted to account for epigenetic factors, such as food quality, which may affect the number of instars before pupation. Furthermore, a mechanistic mathematical definition of the BrookDyar’s law would be useful to more accurately describe the relative properties of a given epigenetic factor. We used the fall armyworm (Spodoptera frugiperda) as a model to test if the BrooksDyar Law holds true for larvae reared on different natural and artificial diets. We studied whether the distance between frontal setae can be used as a reliable measurement for the application of the BrooksDyar Law. Finally, we propose a mathematical formula for the BrooksDyar’s law, which includes a constant and two parameters, all defined in light of food quality as a driving epigenetic factor 20190927T22:48:07Z 20190927T22:48:07Z 2018 info:eurepo/semantics/other Póster http://hdl.handle.net/20.500.12324/35523 2886 reponame:Biblioteca Digital Agropecuaria de Colombia repourl:https://repository.agrosavia.co instname:Corporación colombiana de investigación agropecuaria AGROSAVIA eng AttributionNonCommercialNoDerivatives 4.0 International http://creativecommons.org/licenses/byncnd/4.0/ application/pdf application/pdf Colombia Colombia Corporación colombiana de investigación agropecuaria Mosquera (Colombia) 
score 
10,793133 