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Journal articles on the topic 'Allometria'

Author: Grafiati

Published: 24 April 2022

Last updated: 30 July 2025

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1

Tsuboi, Masahito. "Exceptionally Steep Brain-Body Evolutionary Allometry Underlies the Unique Encephalization of Osteoglossiformes." Brain, Behavior and Evolution 96, no. 2 (2021): 49–63. http://dx.doi.org/10.1159/000519067.

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Brain-body static allometry, which is the relationship between brain size and body size within species, is thought to reflect developmental and genetic constraints. Existing evidence suggests that the evolution of large brain size without accompanying changes in body size (that is, encephalization) may occur when this constraint is relaxed. Teleost fish species are generally characterized by having close-fitting brain-body static allometries, leading to strong allometric constraints and small relative brain sizes. However, one order of teleost, Osteoglossiformes, underwent extreme encephalizat

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Le Verger, Kévin, Lionel Hautier, Jérémie Bardin, Sylvain Gerber, Frédéric Delsuc, and Guillaume Billet. "Ontogenetic and static allometry in the skull and cranial units of nine-banded armadillos (Cingulata: Dasypodidae: Dasypus novemcinctus)." Biological Journal of the Linnean Society 131, no. 3 (2020): 673–98. http://dx.doi.org/10.1093/biolinnean/blaa083.

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Abstract A large part of extant and past mammalian morphological diversity is related to variation in size through allometric effects. Previous studies suggested that craniofacial allometry is the dominant pattern underlying mammalian skull shape variation, but cranial allometries were rarely characterized within cranial units such as individual bones. Here, we used 3D geometric morphometric methods to study allometric patterns of the whole skull (global) and of cranial units (local) in a postnatal developmental series of nine-banded armadillos (Dasypus novemcinctus ssp.). Analyses were conduc

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Wiff, Rodrigo, and Rubén Roa-Ureta. "Predicting the slope of the allometric scaling of consumption rates in fish using the physiology of growth." Marine and Freshwater Research 59, no. 10 (2008): 912. http://dx.doi.org/10.1071/mf08053.

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Allometric scaling (where body size features as the independent variable) has been observed in many aspects of fish biology. Empirical studies have shown that individual and population rates of food consumption for single and multi-species datasets show positive allometry. However, the ratio of population consumption to biomass shows negative allometry when evaluated across species. In this paper, a theoretical explanation is proposed that predicts the magnitudes and signs of the allometric slopes for consumption and consumption/biomass within and among species. It is proposed that the ultimat

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Gehring, Christoph, Marcelo Luís C. Zelarayán, Rosângela B. Almeida, and Flávio Henrique R. Moraes. "Allometria da palmeira babaçu em um agroecossistema de derruba-e-queima na periferia este da Amazônia." Acta Amazonica 41, no. 1 (2011): 127–34. http://dx.doi.org/10.1590/s0044-59672011000100015.

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A palmeira babaçu (Attalea speciosa C.Martius, Arecaceae) tem grande importância socioeconômica e ecológica em grande parte da área tropical brasileira, especialmente em áreas degradadas por queimadas freqüentes na Amazônia. No entanto, ainda pouco se sabe sobre as características ecológicas desta espécie-chave. Este estudo investiga a alometria do babaçu com o objetivo de estabelecer uma metodologia eficiente na estimativa da biomassa aérea de palmeiras juvenis e adultas e para um melhor entendimento da sua arquitetura. A biomassa de palmeiras juvenis pode ser estimada facilmente e com precis

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Houle, David, Luke T. Jones, Ryan Fortune, and Jacqueline L. Sztepanacz. "Why does allometry evolve so slowly?" Integrative and Comparative Biology 59, no. 5 (2019): 1429–40. http://dx.doi.org/10.1093/icb/icz099.

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Abstract Morphological allometry is striking due to its evolutionary conservatism, making it an example of a certain sort of evolutionary stasis. Organisms that vary in size, whether for developmental, environmental, or evolutionary reasons, adopt shapes that are predictable from that size alone. There are two major hypotheses to explain this. It may be that natural selection strongly favors each allometric pattern, or that organisms lack the development and genetic capacity to produce variant shapes for selection to act on. Using a high-throughput system for measuring the size and shape of Dr

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Rodríguez, Rafael Lucas, and William G. Eberhard. "Why the Static Allometry of Sexually-Selected Traits Is So Variable: The Importance of Function." Integrative and Comparative Biology 59, no. 5 (2019): 1290–302. http://dx.doi.org/10.1093/icb/icz039.

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AbstractSexually-selected traits often show positive static allometry, with large individuals bearing disproportionately large structures. But many other sexually-selected traits show isometry or even negative allometry, with trait size varying relatively little with body size. We recently proposed that the functions of these traits (as aggressive signals, weapons, courtship signals, and contact courtship devices) determine their allometries. Positive allometry is generally favored for aggressive signals because aggressive signals are selected to emphasize body size (and thus fighting prowess)

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Zhang, Ying, Hengyu Zhang, Yunfeng Zhao, Xiaojing Zhou, Jie Du, and Runqing Yang. "Genetic Association Analysis for Relative Growths of Body Compositions and Metabolic Traits to Body Weights in Broilers." Animals 11, no. 2 (2021): 469. http://dx.doi.org/10.3390/ani11020469.

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In animal breeding, body components and metabolic traits always fall behind body weights in genetic improvement, which leads to the decline in standards and qualities of animal products. Phenotypically, the relative growth of multiple body components and metabolic traits relative to body weights are characterized by using joint allometric scaling models, and then random regression models (RRMs) are constructed to map quantitative trait loci (QTLs) for relative grwoth allometries of body compositions and metabolic traits in chicken. Referred to as real joint allometric scaling models, statistic

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Shea, Brian T., Robert E. Hammer, Ralph L. Brinster, and Matthew R. Ravosa. "Relative growth of the skull and postcranium in giant transgenic mice." Genetical Research 56, no. 1 (1990): 21–34. http://dx.doi.org/10.1017/s0016672300028846.

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SummaryCross-sectional allometric growth patterns of the cranial and postcranial skeleton were compared between giant transgenic (MT-rGH) mice and their normal littermate controls. Body weights, external body dimensions, and a series of cranial and postcranial linear dimensions of the skeleton were determined for samples of known age. Comparative bivariate and multivariate allometric analyses were completed in order to determine whether (1) the larger transgenic mice differed significantly from the normal controls in aspects of body and skeletal proportions, and (2) any such proportion differe

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Hunter, M. O., M. Keller, D. Victoria, and D. C. Morton. "Tree height and tropical forest biomass estimation." Biogeosciences 10, no. 12 (2013): 8385–99. http://dx.doi.org/10.5194/bg-10-8385-2013.

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Abstract. Tropical forests account for approximately half of above-ground carbon stored in global vegetation. However, uncertainties in tropical forest carbon stocks remain high because it is costly and laborious to quantify standing carbon stocks. Carbon stocks of tropical forests are determined using allometric relations between tree stem diameter and height and biomass. Previous work has shown that the inclusion of height in biomass allometries, compared to the sole use of diameter, significantly improves biomass estimation accuracy. Here, we evaluate the effect of height measurement error

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Hunter, M. O., M. Keller, D. Vitoria, and D. C. Morton. "Tree height and tropical forest biomass estimation." Biogeosciences Discussions 10, no. 6 (2013): 10491–529. http://dx.doi.org/10.5194/bgd-10-10491-2013.

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Abstract. Tropical forests account for approximately half of above-ground carbon stored in global vegetation. However, uncertainties in tropical forest carbon stocks remain high because it is costly and laborious to quantify standing carbon stocks. Carbon stocks of tropical forests are determined using allometric relations between tree stem diameter and height and biomass. Previous work has shown that the inclusion of height in biomass allometries, compared to the sole use of diameter, significantly improves biomass estimation accuracy. Here, we evaluate the effect of height measurement error

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11

Broad, L. R. "Allometry and Growth." Forest Science 44, no. 3 (1998): 458–64. http://dx.doi.org/10.1093/forestscience/44.3.458.

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Abstract A theory of multivariate allometry is developed. Bivariate and multivariate allometry are then shown to be compatible, the defining differential equations being analogs of each other and invariant under analogous allometric transforms. The relevance of allometric equations to growth modeling is examined. Commonly used growth models that are invariant under allometric transforms are capable of being formulated in terms of allometric (growth) differential equations. Methods for formulating and solving multivariate growth models are demonstrated. For. Sci. 44(3):458-464.

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Echavarria-Heras, Hector A., Juan R. Castro-Rodriguez, Cecilia Leal-Ramirez, and Enrique Villa-Diharce. "Assessment of a Takagi–Sugeno-Kang fuzzy model assembly for examination of polyphasic loglinear allometry." PeerJ 8 (January 6, 2020): e8173. http://dx.doi.org/10.7717/peerj.8173.

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Background The traditional allometric analysis relies on log- transformation to contemplate linear regression in geometrical space then retransforming to get Huxley’s model of simple allometry. Views assert this induces bias endorsing multi-parameter complex allometry forms and nonlinear regression in arithmetical scales. Defenders of traditional approach deem it necessary since generally organismal growth is essentially multiplicative. Then keeping allometry as originally envisioned by Huxley requires a paradigm of polyphasic loglinear allometry. A Takagi-Sugeno-Kang fuzzy model assembles a m

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Rilling, James K. "Allometric departures for the human brain provide insights into hominid brain evolution." Behavioral and Brain Sciences 24, no. 2 (2001): 292–93. http://dx.doi.org/10.1017/s0140525x01373958.

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Researchers studying primate brain allometry often focus on departures from allometry more than the allometric relationships themselves because only the former reveal what brain regions and behavioral-cognitive abilities were the focus of selection. Allometric departures for the human brain provide insights into hominid brain evolution and cast doubt on the suggestion that the large human cerebral cortex is a “spandrel.”

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Voje, Kjetil L., Thomas F. Hansen, Camilla K. Egset, Geir H. Bolstad, and Christophe Pélabon. "ALLOMETRIC CONSTRAINTS AND THE EVOLUTION OF ALLOMETRY." Evolution 68, no. 3 (2013): 866–85. http://dx.doi.org/10.1111/evo.12312.

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15

Munana, Nila, Irwani Irwani, and Widianingsih Widianingsih. "Pola Pertumbuhan Kepiting Bakau (Scylla serrata) Di Perairan Desa Bandengan Kendal." Journal of Marine Research 10, no. 1 (2021): 14–22. http://dx.doi.org/10.14710/jmr.v10i1.28990.

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Kepiting bakau (Scylla serrata) merupakan jenis kepiting yang banyak ditemukan di beberapa daerah, salah satunya di Perairan Desa Bandengan, Kendal. Kepiting bakau setiap harinya ditangkap oleh nelayan, keadaan ini dapat mempengaruhi terhadap populasi kepiting bakau. Fase bulan dapat memberikan pengaruh terhadap kepiting bakau, seperti pada tingkah laku kepiting bakau. Tujuan dari penelitian ini yaitu untuk mengetahui pola pertumbuhan kepiting bakau pada fase bulan mati dan purnama di Perairan Desa Bandengan Kendal. Metode yang digunakan yaitu bersifat deskriptif eksploratif. Pengambilan data

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16

Deng, Cheng, Shougong Zhang, Yuanchang Lu, Robert E. Froese, Angang Ming, and Qingfen Li. "Thinning Effects on the Tree Height–Diameter Allometry of Masson Pine (Pinus massoniana Lamb.)." Forests 10, no. 12 (2019): 1129. http://dx.doi.org/10.3390/f10121129.

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The stem height–diameter allometric relationship is fundamental in determining forest and ecosystem structures as well as in estimating tree volume, biomass, and carbon stocks. Understanding the effects of silvicultural practices on tree height–diameter allometry is necessary for sustainable forest management, though the impact of measures such as thinning on the allometric relationship remain understudied. In the present study, the effects of thinning on tree height–diameter allometry were evaluated using Masson pine height and diameter growth data from a plantation experiment that included u

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Sansalone, G., K. Allen, J. A. Ledogar, et al. "Variation in the strength of allometry drives rates of evolution in primate brain shape." Proceedings of the Royal Society B: Biological Sciences 287, no. 1930 (2020): 20200807. http://dx.doi.org/10.1098/rspb.2020.0807.

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Large brains are a defining feature of primates, as is a clear allometric trend between body mass and brain size. However, important questions on the macroevolution of brain shape in primates remain unanswered. Here we address two: (i), does the relationship between the brain size and its shape follow allometric trends and (ii), is this relationship consistent over evolutionary time? We employ three-dimensional geometric morphometrics and phylogenetic comparative methods to answer these questions, based on a large sample representing 151 species and most primate families. We found two distinct

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Shpuza, Ermal. "Relative size measures of urban form based on allometric subtraction." Environment and Planning B: Urban Analytics and City Science 44, no. 1 (2016): 141–59. http://dx.doi.org/10.1177/0265813515611420.

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One of the most common relativization techniques in life sciences quantifies body condition based on residuals from the linear regression in the log–log plot of body mass against a linear measure of size. Given the network-based analogy between organisms and cities, the method is applied to comparative urban studies to formulate relativized allometric measures based on the allometry to size of metric and topological measures of street networks. The analysis of a sample of 70 cities from a confined region considered in three historical stages demonstrates that the more allometric scaling of a m

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Hallgrímsson, Benedikt, David C. Katz, Jose D. Aponte, et al. "Integration and the Developmental Genetics of Allometry." Integrative and Comparative Biology 59, no. 5 (2019): 1369–81. http://dx.doi.org/10.1093/icb/icz105.

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Abstract Allometry refers to the ways in which organismal shape is associated with size. It is a special case of integration, or the tendency for traits to covary, in that variation in size is ubiquitous and evolutionarily important. Allometric variation is so commonly observed that it is routinely removed from morphometric analyses or invoked as an explanation for evolutionary change. In this case, familiarity is mistaken for understanding because rarely do we know the mechanisms by which shape correlates with size or understand their significance. As with other forms of integration, allometr

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Toubiana, William, David Armisén, Séverine Viala, Amélie Decaras, and Abderrahman Khila. "The growth factor BMP11 is required for the development and evolution of a male exaggerated weapon and its associated fighting behavior in a water strider." PLOS Biology 19, no. 5 (2021): e3001157. http://dx.doi.org/10.1371/journal.pbio.3001157.

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Exaggerated sexually selected traits, often carried by males, are characterized by the evolution of hyperallometry, resulting in their disproportionate growth relative to the rest of the body among individuals of the same population. While the evolution of allometry has attracted much attention for centuries, our understanding of the developmental genetic mechanisms underlying its emergence remains fragmented. Here we conduct comparative transcriptomics of the legs followed by an RNA interference (RNAi) screen to identify genes that play a role in the hyperallometric growth of the third legs i

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Lemaître, J. F., C. Vanpé, F. Plard, and J. M. Gaillard. "The allometry between secondary sexual traits and body size is nonlinear among cervids." Biology Letters 10, no. 3 (2014): 20130869. http://dx.doi.org/10.1098/rsbl.2013.0869.

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Allometric relationships between sexually selected traits and body size have been extensively studied in recent decades. While sexually selected traits generally display positive allometry, a few recent reports have suggested that allometric relationships are not always linear. In male cervids, having both long antlers and large size provides benefits in terms of increased mating success. However, such attributes are costly to grow and maintain, and these costs might constrain antler length from increasing at the same rate as body mass in larger species if the quantity of energy that males can

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Ginzburg, Lev R., Oskar Burger, and John Damuth. "The May threshold and life-history allometry." Biology Letters 6, no. 6 (2010): 850–53. http://dx.doi.org/10.1098/rsbl.2010.0452.

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One of Robert May's classic results was finding that population dynamics become chaotic when the average lifetime rate of reproduction exceeds a certain value. Populations whose reproductive rates exceed this May threshold probably become extinct. The May threshold in each case depends upon the shape of the density-dependence curve, which differs among models of population growth. However, species of different sizes and generation times that share a roughly similar density-dependence curve will also share a similar May threshold. Here, we argue that this fact predicts a striking allometric reg

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Claverie, Thomas, and I. Philip Smith. "Morphological maturity and allometric growth in the squat lobster Munida rugosa." Journal of the Marine Biological Association of the United Kingdom 89, no. 6 (2009): 1189–94. http://dx.doi.org/10.1017/s0025315409000277.

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Size at the onset of sexual maturity was determined in Munida rugosa based on allometric growth of chelipeds and abdomen, and on the proportion of ovigerous females. The variability of three different measurements of carapace length (CL) used previously for M. rugosa was also evaluated to minimize measurement error. Both sexes had symmetrical cheliped length and allometric cheliped growth over the size-range investigated, but males showed increased allometry beyond 22 mm CL. Females had greater positive allometry in abdomen width than males, but their size at maturity could not be precisely de

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Krone, Isaac W., Christian F. Kammerer, and Kenneth D. Angielczyk. "The many faces of synapsid cranial allometry." Paleobiology 45, no. 4 (2019): 531–45. http://dx.doi.org/10.1017/pab.2019.26.

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AbstractPrevious studies of cranial shape have established a consistent interspecific allometric pattern relating the relative lengths of the face and braincase regions of the skull within multiple families of mammals. In this interspecific allometry, the facial region of the skull is proportionally longer than the braincase in larger species. The regularity and broad taxonomic occurrence of this allometric pattern suggests that it may have an origin near the base of crown Mammalia, or even deeper in the synapsid or amniote forerunners of mammals. To investigate the possible origins of this al

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White, Craig R., Phillip Cassey, and Tim M. Blackburn. "ALLOMETRIC EXPONENTS DO NOT SUPPORT A UNIVERSAL METABOLIC ALLOMETRY." Ecology 88, no. 2 (2007): 315–23. http://dx.doi.org/10.1890/05-1883.

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O'Keefe, F. Robin, Olivier Rieppel, and P. Martin Sander. "Shape disassociation and inferred heterochrony in a clade of pachypleurosaurs (Reptilia, Sauropterygia)." Paleobiology 25, no. 4 (1999): 504–17. http://dx.doi.org/10.1017/s0094837300020352.

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In this paper we analyze the ontogenies of four species of pachypleurosaur (Reptilia: Sauropterygia) occurring in Triassic-age deposits in the Monte San Giorgio region, Switzerland. Preservation of multiple complete specimens representing a growth series from each taxon allows the comparison of ontogenetic trajectories through a space composed of nine variables important in the evolution of the clade. Trajectories are characterized using the multivariate generalization of the allometry equation and then compared through calculations of the angles between allometry vectors. Individual coefficie

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Howard, Richard D. "Ontogeny of a sexual dimorphism in tiger salamanders." Canadian Journal of Zoology 87, no. 7 (2009): 573–80. http://dx.doi.org/10.1139/z09-043.

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Sexual dimorphism results when the sexes differ in the degree to which trait elaboration confers a reproductive or survival advantage. Trait size dimorphism is often reported in terms of allometry, typically using adults of varying ages (static allometry). A static allometric analysis of tail length in breeding tiger salamanders ( Ambystoma tigrinum (Green, 1825)) revealed that tail length is a positive allometric trait in both sexes, as well as a sexually dimorphic trait. Although static analyses are common in the literature, ontogenetic allometric analyses in which individuals are measured t

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Garcia, Maxime, and Andrea Ravignani. "Acoustic allometry and vocal learning in mammals." Biology Letters 16, no. 7 (2020): 20200081. http://dx.doi.org/10.1098/rsbl.2020.0081.

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Acoustic allometry is the study of how animal vocalizations reflect their body size. A key aim of this research is to identify outliers to acoustic allometry principles and pinpoint the evolutionary origins of such outliers. A parallel strand of research investigates species capable of vocal learning , the experience-driven ability to produce novel vocal signals through imitation or modification of existing vocalizations. Modification of vocalizations is a common feature found when studying both acoustic allometry and vocal learning. Yet, these two fields have only been investigated separately

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Senarathna, S. M. D. K. Ganga, and Kevin T. Batty. "Interspecies Allometric Scaling of Antimalarial Drugs and Potential Application to Pediatric Dosing." Antimicrobial Agents and Chemotherapy 58, no. 10 (2014): 6068–78. http://dx.doi.org/10.1128/aac.02538-14.

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ABSTRACTPharmacopeial recommendations for administration of antimalarial drugs are the same weight-based (mg/kg of body weight) doses for children and adults. However, linear calculations are known to underestimate pediatric doses; therefore, interspecies allometric scaling data may have a role in predicting doses in children. We investigated the allometric scaling relationships of antimalarial drugs using data from pharmacokinetic studies in mammalian species. Simple allometry (Y=a×Wb) was utilized and compared to maximum life span potential (MLP) correction. All drugs showed a strong correla

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LONG, FEI, YING QING CHEN, JAMES M. CHEVERUD, and RONGLING WU. "Genetic mapping of allometric scaling laws." Genetical Research 87, no. 3 (2006): 207–16. http://dx.doi.org/10.1017/s0016672306008172.

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Many biological processes, from cellular metabolism to population dynamics, are characterized by particular allometric scaling relationships between rate and size (power laws). A statistical model for mapping specific quantitative trait loci (QTLs) that are responsible for allometric scaling laws has been developed. We present an improved model for allometric mapping of QTLs based on a more general allometry equation. This improved model includes two steps: (1) use model II regression analysis to estimate the parameters underlying universal allometric scaling laws, and (2) substitute the estim

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Firmat, Cyril, Iván Lozano-Fernández, Jordi Agustí, et al. "Walk the line: 600000 years of molar evolution constrained by allometry in the fossil rodent Mimomys savini." Philosophical Transactions of the Royal Society B: Biological Sciences 369, no. 1649 (2014): 20140057. http://dx.doi.org/10.1098/rstb.2014.0057.

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The allometric-constraint hypothesis states that evolutionary divergence of morphological traits is restricted by integrated growth regulation. In this study, we test this hypothesis on a time-calibrated and well-documented palaeontological sequence of dental measurements on the Pleistocene arvicoline rodent species Mimomys savini from the Iberian Peninsula. Based on 507 specimens representing nine populations regularly spaced over 600 000 years, we compare static (within-population) and evolutionary (among-population) allometric slopes between the width and the length of the first lower molar

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Smoliga, James M., and Otis L. Blanchard. "Allometric scaling models: history, use, and misuse in translating resveratrol from basic science to human clinical applications." Functional Foods in Health and Disease 7, no. 5 (2017): 338. http://dx.doi.org/10.31989/ffhd.v7i5.345.

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Background: Determination of the first-in-human and pharmacologically active dosage for drugs and nutraceutical compounds is a critical step in study design and product development. Allometric scaling is a form of mathematic modeling commonly used to convert dosages between species. While allometric scaling allows for quick and straightforward conversions between species, it is often misunderstood and misused in translational clinical applications. This is readily demonstrated in the case of resveratrol – a polyphenol which is found in red wine. In the past decade, a considerable amount of res

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Mughni, Firmansyah Maulana, Susiana Susiana, and Wahyu Muzammil. "Biomorfometrik Rajungan (Portunus pelagicus) di Perairan Senggarang." Journal of Marine Research 11, no. 2 (2022): 114–27. http://dx.doi.org/10.14710/jmr.v11i2.33085.

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Rajungan (Portunus pelagicus) merupakan salah satu komoditas penting perikanan Indonesia. Perairan Senggarang Kota Tanjungpinang yang merupakan wilayah salah satu habitat rajungan. Tujuan penelitian ini adalah untuk mengetahui hubungan lebar karapas dan bobot, faktor kondisi, dan mengetahui morfometrik rajungan di perairan Senggarang. Penelitian ini menggunakan metode survey menggunakan teknik purposive sampling yaitu berdasarkan daerah tangkapan nelayan rajungan. Hasil penelitian menunjukkan jumlah rajungan jantan dan betina sebanyak 79 dan 56 ekor, sehingga diperoleh nisbah kelamin adalah 1,

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Istiqomah, Lailatul, Saimul Laili, and Hasan Zayadi. "Estimasi Karbon pada Tegakan Varietas Kopi Arabika (Coffea arabica) Di Lahan Agroforestri Precet Wilayah Resort Pemangkuan Hutan Wagir KPH Malang." Jurnal SAINS ALAMI (Known Nature) 5, no. 1 (2022): 15. http://dx.doi.org/10.33474/j.sa.v5i1.12819.

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Global warming that causes climate change is due to increased emissions of greenhouse gases (GHG) in the form of CO2, CH4 and other forms in the atmosphere. The application of the agroforestry system is one of the efforts to overcome the need for agricultural land by maintaining the function of the forest and the environment. The purpose of this study was to determine the potential for carbon stored in Arabica coffee (Coffea arabica) stands and to determine abiotic factors in the locations where Arabica coffee (Coffea arabica) stands grow in agroforestry areas. This research used descriptive m

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Finarelli, John A. "Testing hypotheses of the evolution of encephalization in the Canidae (Carnivora, Mammalia)." Paleobiology 34, no. 1 (2008): 35–45. http://dx.doi.org/10.1666/07030.1.

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Evolutionary trends observed over large clades have the potential to mask underlying trends that occur within their constituent subclades. A recent study of encephalization in the Caniformia (Carnivora, Mammalia) found evidence for an abrupt increase in median log-encephalization quotients (logEQs), indicating higher brain volume relative to body mass, at the end-Miocene, but gradual increase in the variance of logEQs. In this study, new endocranial volume estimates for fossil taxa in the well-sampled caniform subclade Canidae are reported. Using the encephalization data for the Canidae, hypot

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Ausich, William I., and Troy E. Wood. "Ontogeny ofHypselocrinus Hoveyi, Mississippian Cladid Crinoid From Indiana." Journal of Paleontology 86, no. 6 (2012): 1017–20. http://dx.doi.org/10.1666/12-044r.1.

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A very early juvenile specimen ofHypselocrinus hoveyiwith arms and partial column attached is utilized to examine the growth in this Mississippian advanced cladid crinoid. The aboral cup height of this specimen is 4 mm. In contrast to results reported in previous studies of crinoids,Hypselocrinus hoveyigrew with a combination of allometric and isometric growth. Different plates of the aboral cup grew with a combination of growth modes, and arms grew with allometric growth or relative change in shape that was not strict allometry.

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Santoso, Adi, and Endang Sri Susilo. "Studi Pendahuluan Hubungan Panjang–Berat Ikan Tenggiri (Scomberomorus commerson) dari Perairan Semarang." Jurnal Kelautan Tropis 19, no. 2 (2016): 161. http://dx.doi.org/10.14710/jkt.v19i2.843.

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Length-weight relationship study of narrow-barred spanish mackerel (Scomberomorus commerson) from Semarang waters was commenced in October-November 2014. The result showed that the fish growth at both the months of October and November 2014 was a negative allometric growth. There was uncertainty to answer the low value for b component during November although at this month was a peak of the fish catching at Java Sea. Due to small fish landed, it indicated that narrow-barred Spanish mackerel of Semarang waters were not proper to be caught. Keywords : narrow-barred Spanish mackerel, length-weigh

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Reitz, Elizabeth J., Irvy R. Quitmyer, H. Stephen Hale, Sylvia J. Scudder, and Elizabeth S. Wing. "Application of Allometry to Zooarchaeology." American Antiquity 52, no. 2 (1987): 304–17. http://dx.doi.org/10.2307/281782.

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Zooarchaeologists have used several methods to assess the relative dietary contribution of species found at archaeological sites. The most common methods are either based upon the assumption that bone weight is a fixed percentage of total body weight, or require estimating an "average" body size for identified taxa. In fact, the relationship between parameters of bone and body mass is generally allometric and can be described by linear regression. Use of allometric models places original body mass predictions on a more sound biological basis and makes calculations of "average" weight unnecessa

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Dr.Gaike, Pramod Prasram Patil Kalpana. "ALLOMETRIC GROWTH IN APPENDAGE OF FRESHWATER CRAB BARYTELPHUSA GURINI (H. MILNE EDWAEDS, 1853), (CRUSTACEA, DECAPODA, BRACHYURA)." International Journal of Advance and Applied Research 2, no. 18 (2022): 225–31. https://doi.org/10.5281/zenodo.7056966.

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<strong><em>Abstract</em></strong> <em>Allometric growth in Barytelphusa guerini has been analyzed by power function equation y=a.x<sup>b,</sup> where y is the reference dimension, ‘b’ is the regression coefficient and ‘a’, is the y-intercept. The allometric and isometric growth pattern was shown in thoracic and abdominal appendages; particularly in male and female with specificity with sex. Positive allometric growth was seen in carapace width, abdomen width chelate leg and in male and female crab. Negative allometric growth observed in abdomen width in male and gonopo

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Patil, Kalpana Dr.Gaike Pramod Prasram. "ALLOMETRIC GROWTH IN APPENDAGE OF FRESHWATER CRAB BARYTELPHUSA GURINI (H. MILNE EDWAEDS, 1853), (CRUSTACEA, DECAPODA, BRACHYURA)." International Journal of Advance and Applied Research 2, no. 18 (2022): 225–31. https://doi.org/10.5281/zenodo.7070629.

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<strong><em>Abstract</em></strong> <em>Allometric growth in Barytelphusa guerini has been analyzed by power function equation y=a.x<sup>b,</sup> where y is the reference dimension, ‘b’ is the regression coefficient and ‘a’, is the y-intercept. The allometric and isometric growth pattern was shown in thoracic and abdominal appendages; particularly in male and female with specificity with sex. Positive allometric growth was seen in carapace width, abdomen width chelate leg and in male and female crab. Negative allometric growth observed in abdomen width in male and gonopo

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41

Mahima, K. V., P. P. Anand, S. Seena, K. Shameema, E. M. Manogem, and Y. Shibu Vardhanan. "Caste-specific phenotypic plasticity of Asian weaver ants: Revealing the allometric and non-allometric component of female caste system of Oecophylla smaragdina (Hymenoptera: Formicidae) by using geometric morphometrics." Sociobiology 68, no. 2 (2021): 5941. http://dx.doi.org/10.13102/sociobiology.v68i2.5941.

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In eusocial insects, particularly in ants, caste differentiation is extremely complicated when we rely on traditional taxonomy. In most species, the worker caste does not display any distinct morphological characters neither the caste’s central division according to their morphological size variations. We used a landmark-based geometric morphometric approach to quantify the morphological characteristics of female caste systems (queen, major and minor worker ant) of Oecophylla smaragdina. Our findings suggested that each caste has its unique shape and size. Especially in the worker caste, apart

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Bales, Gerald S. "Heterochrony in brontothere horn evolution: allometric interpretations and the effect of life history scaling." Paleobiology 22, no. 4 (1996): 481–95. http://dx.doi.org/10.1017/s009483730001647x.

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The Brontotheriidae (Perissodactyla, Mammalia) are often used as an illustration of vertebrate macroevolutionary trends because their morphological evolution includes significant size increases accompanied by the disproportionate lengthening of bony frontonasal horns. The positive phylogenetic allometry for horn length vs. skull length is among the strongest known of such relationships in vertebrate phylogeny. Hypotheses explaining the change from small, incipient horns in Eocene ancestors to longer horns in Oligocene descendants have included two heterochronic mechanisms, hypermorphosis (extr

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Perez, Damián Eduardo, and María Belén Santelli. "Allometric shell growth in infaunal burrowing bivalves: examples of the archiheterodontsClaibornicardia paleopatagonica(Ihering, 1903) andCrassatella kokeniIhering, 1899." PeerJ 6 (June 19, 2018): e5051. http://dx.doi.org/10.7717/peerj.5051.

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We present two cases of study of ontogenetic allometry in outlines of bivalves using longitudinal data, a rarity among fossils, based on the preserved post-larval record of shells. The examples are two infaunal burrowing bivalves of the southern South America,Claibornicardia paleopatagonica(Archiheterodonta: Carditidae) (early Paleocene) andCrassatella kokeni(Archiheterodonta: Crassatellidae) (late Oligocene–late Miocene). Outline analyses were conducted using a geometric morphometric approach (Elliptic Fourier Analysis), obtaining successive outlines from shells’ growth lines, which were used

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Vasseur, François, Moises Exposito-Alonso, Oscar J. Ayala-Garay, et al. "Adaptive diversification of growth allometry in the plant Arabidopsis thaliana." Proceedings of the National Academy of Sciences 115, no. 13 (2018): 3416–21. http://dx.doi.org/10.1073/pnas.1709141115.

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Seed plants vary tremendously in size and morphology; however, variation and covariation in plant traits may be governed, at least in part, by universal biophysical laws and biological constants. Metabolic scaling theory (MST) posits that whole-organismal metabolism and growth rate are under stabilizing selection that minimizes the scaling of hydrodynamic resistance and maximizes the scaling of resource uptake. This constrains variation in physiological traits and in the rate of biomass accumulation, so that they can be expressed as mathematical functions of plant size with near-constant allom

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Lee, Y. "An Allometric Analysis of the US Urban System: 1960 – 80." Environment and Planning A: Economy and Space 21, no. 4 (1989): 463–76. http://dx.doi.org/10.1068/a210463.

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In this paper the relationship between urban population size and land area of urbanized areas of the USA in 1960, 1970, and 1980 is analyzed by means of the allometric growth law. The US urban system of each of the above time periods is disaggregated into seven population-size classes and nine geographic regions. A total of fifty-one equations are estimated. Although the statistical results of the allometric equations classified according to population are not satisfactory, the equations classified according to region are superior. Among the major findings for the US urban system are: the exis

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Echavarria-Heras, Leal-Ramirez, Villa-Diharce, and Castro-Rodríguez. "A Generalized Model of Complex Allometry I: Formal Setup, Identification Procedures and Applications to Non-Destructive Estimation of Plant Biomass Units." Applied Sciences 9, no. 22 (2019): 4965. http://dx.doi.org/10.3390/app9224965.

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(1) Background: We previously demonstrated that customary regression protocols for curvature in geometrical space all derive from a generalized model of complex allometry combining scaling parameters expressing as continuous functions of covariate. Results highlighted the relevance of addressing suitable complexity in enhancing the accuracy of allometric surrogates of plant biomass units. Nevertheless, examination was circumscribed to particular characterizations of the generalized model. Here we address the general identification problem. (2) Methods: We first suggest a log-scales protocol co

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Dutcă, Ioan, Alexandra Cernat, Petru Tudor Stăncioiu, Florin Ioraș, and Mihai Daniel Niță. "Does Slope Aspect Affect the Aboveground Tree Shape and Volume Allometry of European Beech (Fagus sylvatica L.) Trees?" Forests 13, no. 7 (2022): 1071. http://dx.doi.org/10.3390/f13071071.

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In mountainous or hilly areas, the slope aspect affects the amount of solar radiation, with direct consequences on species distribution and tree growth. However, little is known on how the tree shape and volume allometry may be affected by contrasting environmental conditions driven by the slope aspect. This study aims to investigate whether the slope aspect affects the aboveground tree shape and volume allometry of European beech (Fagus sylvatica L.) trees. We used the data of scanned trees from two plots located on south- and respectively north-facing slopes and, additionally, an inventory d

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Olubiyo, C. K., P. A. Audu, L. K. Adang, and G. T. Olubiyo. "Effects of parasites on growth pattern of African catfish (<i>Clarias gariepinus</i>) in Omi Dam, Omi, Yagba West Local Government Area, Kogi State." Scientia Africana 22, no. 2 (2023): 107–14. http://dx.doi.org/10.4314/sa.v22i2.11.

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The study was carried out using 506 Clarias gariepinus specimens over a period of one year, from Omi Dam (Latitudes 8o34’N – 8o38′N, Longitudes 6o37′E – 6o42′E) Omi, Kogi State, Nigeria. Standard methods were used to determine length-weight relationship, condition factor, and parasitic infestation of the fish in the dam. Generally, fish growth for non-parasitized fishes was positively allometric and condition factor is >1.5, while parasitized fishes had negative allometric growth and condition factor is <1.The negative allometry for parasitized shows the fish weight decreases less quickl

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Chen, Yanguang, and Jian Feng. "A Hierarchical Allometric Scaling Analysis of Chinese Cities: 1991–2014." Discrete Dynamics in Nature and Society 2017 (2017): 1–15. http://dx.doi.org/10.1155/2017/5243287.

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The law of allometric scaling based on Zipf distributions can be employed to research hierarchies of cities in a geographical region. However, the allometric patterns are easily influenced by random disturbance from the noises in observational data. In theory, both the allometric growth law and Zipf’s law are related to the hierarchical scaling laws associated with fractal structure. In this paper, the scaling laws of hierarchies with cascade structure are used to study Chinese cities, and the method of R/S analysis is applied to analyzing the change trend of the allometric scaling exponents.

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Pittman, S. D., and E. C. Turnblom. "A study of self-thinning using coupled allometric equations: implications for coastal Douglas-fir stand dynamics." Canadian Journal of Forest Research 33, no. 9 (2003): 1661–69. http://dx.doi.org/10.1139/x03-086.

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The 3/2 self-thinning rule was proposed with the hypothesis that in closed canopy stands, plant mass is proportional to the cube of a linear size dimension, and that density is proportional to the square of this dimension, thus defining the isometric model. To account for the morphological differences among species, the allometric model was proposed as a refinement of the isometric model, therefore linking the self-thinning exponent's dependence to species-specific allometric parameters. In this study, it is proposed that each stand has its own self-thinning trajectory boundary, determined by

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