Consulta: subjectFacets:"Body mass"
Registros recuperados: 18
Data/hora: 07/06/2024 03:44:45

Variability in Population Abundance is Associated with Thresholds between Scaling Regimes
Provedor de dados: 7
Autores: Wardwell, Donald; Nebraska Cooperative Fish and Wildlife Research Unit; don_wardwell@hotmail.com; Allen, Craig R; U.S. Geological Survey; Nebraska Cooperative Fish and Wildlife Research Unit; allencr@unl.edu.
Discontinuous structure in landscapes may result in discontinuous, aggregated species body-mass patterns, reflecting the scales of structure available to animal communities within a landscape. The edges of these body-mass aggregations reflect transitions between available scales of landscape structure. Such transitions, or scale breaks, are theoretically associated with increased biological variability. We hypothesized that variability in population abundance is greater in animal species near the edge of body-mass aggregations than it is in species that are situated in the interior of body-mass aggregations. We tested this hypothesis by examining both temporal and spatial variability in the abundance of species in the bird community of the Florida...
Tipo: Peer-Reviewed Reports
Palavras-chave: Body mass; Breeding Bird Survey; Everglades; Phase transition; Scale; Textural discontinuity hypothesis.
Ano: 2009

Scaling of Natal Dispersal Distances in Terrestrial Birds and Mammals
Provedor de dados: 7
Autores: Sutherland, Glenn D; University of British Columbia; gsland@interchg.ubc.ca; Harestad, Alton S; Simon Fraser University; harestad@sfu.ca; Price, Karen; Simon Fraser University; kprice@futurenet.ca; Lertzman, Ken; Simon Fraser University; lertzman@sfu.ca.
Natal dispersal is a process that is critical in the spatial dynamics of populations, including population spread, recolonization, and gene flow. It is a central focus of conservation issues for many vertebrate species. Using data for 77 bird and 68 mammal species, we tested whether median and maximum natal dispersal distances were correlated with body mass, diet type, social system, taxonomic family, and migratory status. Body mass and diet type were found to predict both median and maximum natal dispersal distances in mammals: large species dispersed farther than small ones, and carnivorous species dispersed farther than herbivores and omnivores. Similar relationships occurred for carnivorous bird species, but not for herbivorous or omnivorous ones....
Tipo: Peer-Reviewed Reports
Palavras-chave: Allometric scaling; Birds; Body mass; Comparative analysis; Connectedness; Diet type; Habitat alterations; Life history; Mammals; Movements; Natal dispersal distances; Probability density function.
Ano: 2000

A re-evaluation of evidence raises questions about the fasting migration hypothesis for Swainson's Hawk (Buteo swainsoni)
Provedor de dados: 68
Autores: Bechard,Marc J.; Sarasola,Jose H.; Woodbridge,Brian.
We examined the fasting migration hypothesis for Swainson's Hawks (Buteo swainsoni) by estimating the length, duration, and speed of the migration between North and South America and measuring changes in their body masses at various times throughout the year. We instrumented 34 adult Swainson's Hawks with satellite radios on their breeding grounds in western North America to determine the duration, length, and speed of the migration. Migrating south at 188 km/day, it took Swainson's Hawks 51 days to complete their 13504 km migration to their austral summer grounds. Averaging only 150 km/day on their return migration, it took them 60 days to complete the shorter 11952 km migration back to North America. Adult male and female Swainson's Hawks had average...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Body mass; Buteo swainsoni; Fasting; Migration; Swainson's Hawk.
Ano: 2006
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072006000200002

Ecology and natural history of Akodon lindberghi (Rodentia, Sigmodontinae) in southeastern Brazil
Provedor de dados: 76
Autores: Queirolo,Diego; Granzinolli,Marco A. M.
We studied the ecology and natural history of the globally threatened and poorly known Akodon lindberghi Hershkovitz, 1990 in Parque Nacional da Serra da Canastra (PNSC) and Juiz de Fora (JF), southeastern Brazil. From November 1998 to September 2001 a total of 131 individuals were captured in wire-cage live-traps and 52 by pitfalls traps. They were all marked and released at the site. The largest abundances were registered during the dry season, and most of the captures occurred in open habitats. The mean body mass of the two populations was significantly different (18.1 g at PNSC versus 13.1 g at JF; H = 46.2678, g.l.=2, p&lt;0.001). In PNSC, individuals were reproductively active from August to February, and juveniles were present from May to August....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Akodon lindberghi; Reproduction; Abundance; Body mass; Population structure.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212009000200011

Global patterns and predictors of trophic position, body size and jaw size in fishes
Provedor de dados: 5
Autores: Kopf, R. Keller; Yen, Jian D. L.; Nimmo, Dale G.; Brosse, Sébastien; Villeger, Sébastien; Tittensor, Derek.
Aim The aim of this study was test whether maximum body mass and jaw length are reliable predictors of trophic position (TP) in fishes, and to compare linear and nonlinear machine‐learning (ML) models incorporating biogeography, habitat and other morphological traits. Location Global. Time period Modern. Major taxa studied Fishes. Methods We compiled a global database of TP (2.0–4.5), maximum body mass, jaw length, order, ecoregion, habitat and other morphological traits of freshwater, estuarine and diadromous fishes (n = 1,991). We used Bayesian linear mixed effects and ML, with r2 analogues and 10‐fold cross‐validation, to explain and predict TP. Results Random forest models outperformed Bayesian models in all comparisons. Jaw length was the most...
Tipo: Text
Palavras-chave: Allometric trophic network models; Allometry; Body mass; Gape limitation; Machine learning; Predator&amp;#8211; Prey; Random forest; Trophic network theory.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00661/77349/78823.pdf

Fine scale geographic residence and annual primary production drive body condition of wild immature green turtles (   Chelonia mydas   ) in Martinique Island (Lesser Antilles)
Provedor de dados: 5
Autores: Bonola, Marc; Girondot, Marc; Robin, Jean-patrice; Martin, Jordan; Siegwalt, Flora; Jeantet, Lorène; Lelong, Pierre; Grand, Clément; Chambault, Philippine; Etienne, Denis; Gresser, Julie; Hielard, Gaëlle; Alexandre, Arqué; Régis, Sidney; Nicolas, Laurence; Frouin, Cédric; Lefebvre, Fabien; Sutter, Emmanuel; Vedie, Fabien; Barnerias, Cyrille; Laurent, Thieulle; Bordes, Robinson; Guimera, Christelle; Aubert, Nathalie; Bouaziz, Myriam; Pinson, Adrien; Frédéric, Flora; Matthieu, Duru; Benhalilou, Abdelwahab; Céline, Murgale; Maillet, Thomas; Andreani, Lucas; Campistron, Guilhem; Sikora, Maxym; Rateau, Fabian; Francis, George; Joffrey, Eggenspieler; Woignier, Thierry; Allenou, Jean-pierre; Louis-jean, Laurent; Chanteur, Bénédicte; Béranger, Christelle; Crillon, Jessica; Brador, Aude; Habold, Caroline; Le Maho, Yvon; Chevallier, Damien.
The change of animal biometrics (body mass and body size) can reveal important information about their living environment as well as determine the survival potential and reproductive success of individuals and thus the persistence of populations. However, weighing individuals like marine turtles in the field presents important logistical difficulties. In this context, estimating body mass based on body size is a crucial issue. Furthermore, the determinants of the variability of the parameters for this relationship can provide information about the quality of the environment and the manner in which individuals exploit the available resources. This is of particular importance in young individuals which growth quality might be a determinant of adult fitness....
Tipo: Text
Palavras-chave: Green turtles; Juveniles; Body mass; Body condition; Biometry.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00593/70493/68640.pdf

Anthropometric Characteristics and Body Composition in Aikido Practitioners
Provedor de dados: 77
Autores: Reguli,Zdenko; Bernaciková,Martina; Kumstát,Michal.
Although aikido is a non-competitive martial art, it is recognised by SportAccord as worldwide practiced combat sport. There is a lack of scientific research in aikido and the influence of aikido practice on the human body is not known. This is the first study that presents anthropometric characteristics and body composition data in aikido practitioners. 33 adult male aikido athletes (age 36.5±9.6 years, height 178±8 cm, weight 81.2±10.1 kg) were measured. All subjects were divided from beginner to intermediate and advanced group, and were recruited from the Czech Aikido Federation which is officially recognised by the centre of aikido in Japan. As main methods, bio impedance and skinfold measurements were realized. In aikido, body composition does not...
Tipo: Journal article
Palavras-chave: Matiegka; Bioimpedance; Martial arts; Body mass.
Ano: 2016
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000200001

Body Composition Features in Different Playing Position of Professional Team Indoor Players: Basketball, Handball and Futsal
Provedor de dados: 77
Autores: Ramos-Campo,Domingo Jesús; Martínez Sánchez,Fernando; Esteban García,Paula; Rubio Arias,Jacobo Ángel; Bores Cerezal,Antonio; Clemente-Suarez,Vicente Javier; Jiménez Díaz,José Fernando.
The aim of the present research was to analyze the body composition (BC) and the differences in BC among different playing position in professional basketball, handball and futsal players. BC was assessed in 70 professional indoor team sport players. Players were divided in 4 groups depending on the playing position: group 1, point guard, center/wings and defense; group 2, shooting guard/small forward, handed and midfielder; group 3, power forward/center, pivot and forward; and group 4 goalkeeper. Significant differences between playing positions in basketball in body mass (BM), height, proteins, minerals and arms, legs and trunk BM were found. In handball, significant differences between center/wings and pivot in BM and muscle mass, and between...
Tipo: Journal article
Palavras-chave: Fat mass; Height; Performance; Body mass.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022014000400032

Estimating head and body length in fossil rodents
Provedor de dados: 16
Autores: Freudenthal, M.; Martín-Suárez, E.
We present estimates for head and body length (HBL) of fossil rodents. We assembled HBL data and tooth row length data (LTR, UTR) for a large number of extant rodents, and calculated regression lines of HBL on LTR and UTR for all rodents together (all-rodents equation), and for separate taxonomic groups (family equations). In fossil rodents, data for complete tooth rows are scarce, therefore we use the sum of the lengths of the teeth (LRsum, URsum) as a surrogate for tooth row length. The relation between this parameter and real tooth row length (LTR, UTR) is calculated on the basis of a number of populations for which both parameters are available. We estimate HBL of fossil rodents, using LRsum and URsum and the regression lines of extant rodents, and we...
Tipo: Article / Letter to the editor
Palavras-chave: Rodentia; Body mass; Teeth; Tooth row length.
Ano: 2015
URL: http://www.repository.naturalis.nl/record/607530

Estimating body mass of fossil rodents
Provedor de dados: 16
Autores: Freudenthal, M.; Martín-Suárez, E.
Reconstructing the body mass of a fossil animal is an essential step toward understanding its palaeoecological role. Length × width (L×W) of the first lower molar (m1) is frequently used as a proxy for body mass in fossil mammals. However, among rodents, Muroidea have no premolar and an elongated m1, whereas other groups have a premolar and a m1 that is not elongated. This leads to an overestimation of body mass in muroids and/or an underestimation in other rodents. To solve this problem we assembled data of upper and lower tooth row length and body mass in extant rodents, and calculated regression equations for all rodents, rodents with premolars, rodents without premolars and for taxonomic groups at superfamily or family level. Data for complete tooth...
Tipo: Article / Letter to the editor
Palavras-chave: Rodentia; Body mass; 42.84; 38.22.
Ano: 2013
URL: http://www.repository.naturalis.nl/record/469427

Comparison between circadian motor activity in pony and horse
Provedor de dados: 97
Autores: PICCIONE,GIUSEPPE; GIANNETTO,CLAUDIA; MARAFIOTI,SIMONA; CASELLA,STEFANIA; CAOLA,GIOVANNI.
In this study we investigated the influence of body mass on the daily rhythm of total motor activity in ponies and horses. Six clinically healthy Shetland pony breed with a body mass of 180 ± 30 kg and six healthy horses Sella Italiana breed with a body mass of 530 ± 20 kg were used. Animals were equipped with actigraphy-based data loggers, Actiwatch-Mini® to record total activity. The application of two-way ANOVA showed a highly significant effect of time of day and body mass on motor activity. Cosinor analysis identified the periodic parameters and their acrophases during the two days of monitoring. Mesor and amplitude were statistically higher in horses than in ponies and no statistically significant differences was found about acrophases and...
Tipo: Journal article
Palavras-chave: Body mass; Daily rhythm; Equus caballus; Locomotor activity.
Ano: 2011
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2011000200010

Body mass variation in the Geoffroy's cat (Oncifelis geoffroyi)
Provedor de dados: 97
Autores: LUCHERINI,MAURO; MANFREDI,CLAUDIA; LUENGOS,ESTELA; DIAS MAZIM,FÁBIO; SOLER,LUCÍA; CASANAVE,EMMA B.
We report new data on the intersexual and geographical variation in body mass of the Geoffroy's cat (Oncifelis geoffroyi d'Orbigny and Gervais 1844), a little known small cat from South America, and combine them with the existing information to compare alternative hypotheses for variation in body mass. Most data on the body mass of O. geoffroyi have been obtained from previous research on this felid in four study areas of southern Brazil and central and southern Argentina. These data were added to those reported for other three additional locations. Our results set the body mass of O. geoffroyi to 4.26 ± 1.03 kg (mean ± SD, n = 56). We also show that males generally are heavier than females throughout most of this species' distributional range. Body mass...
Tipo: Journal article
Palavras-chave: Carnivores; Felids; Oncifelis geoffroyi; South America; Body mass.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2006000200003

Occurrence, body mass and biomass of Syntermes spp. (Isoptera: Termitidae) in Reserva Ducke, Central Amazonia
Provedor de dados: 36
Autores: MARTIUS,Christopher.
The leaf-feeding species Syntermes molestus and S. spinosus are two dominant termite species in Reserva Ducke in Central Amazonia; two other species (S. aculeosus, S. longiceps) exist in the area. All species except S. aculeosus were also found in urban areas. The workers of S. molestus and S. spinosus have average body dry weights of 4.5±0.2 and 13.1±1.4 mg, and the weight of their soldiers is 8.2±0.2 and 51.0±1.7 mg, respectively. Therefore, S. spinosus is among the largest termites of the world. In both species, fresh weight is about 4.7 higher than dry weight (a wider relation than in other termite species). The biomass of the populations of both species amounted to about 1 g m-2 (dry weight; indirect estimate), which rises previous assessments of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon rain forest; Leaf-feeding termites; Body mass; Biomass.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671998000300319

Dental occlusal surface area in relation to body mass, food habits and other biological features in fossil xenarthrans
Provedor de dados: 41
Autores: Vizcaíno,Sergio F.; Bargo,M. Susana; Cassini,Guillermo H.
The Xenarthra includes the most intriguing mammals from the Cenozoic of South America: the glyptodonts (Cingulata) and the ground sloths (Tardigrada). Their masticatory apparatuses are diverse and peculiar, with a strongly reduced, hypselodont dentition that lacks enamel and displays different degrees of lobation. The goal of this study is to investigate the relationship between dental occlusal surface area (OSA) and diet, and other physiological factors in fossil xenarthrans. Over one hundred and fifty specimens, including living herbivorous epitherians and both extinct and living xenarthrans, were measured and photographed, and their OSA estimated and plotted against body mass. For most fossil xenarthrans OSA is smaller than expected for extant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mammalia; Xenarthra; Dental Occlusal Surface Area; Body mass; Diet; Physiology.
Ano: 2006
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142006000100002

Dimensional analysis revisited
Provedor de dados: 48
Autores: GÜNTHER,BRUNO; MORGADO,ENRIQUE.
The applicability of dimensional analysis (DA) is discussed in relation to the metabolic scaling laws. The evolution of different theories of biological similarity has shown that the calculated reduced exponents (b) of Huxley's allometric equation are closely correlated with the numerical values obtained from the statistical analysis of empirical data. Body mass and body weight are not equivalent as biological reference systems, since in accordance to Newton's second law, the former has a dimension of a mass, while the latter should be dimensionally considered as a force (W = MLT-2). This distinction affects the coefficients of the mass exponent (a). This difference is of paramount importance in microgravity conditions (spaceflight) and of buoyancy during...
Tipo: Journal article
Palavras-chave: Dimensional analysis; Allometric scaling; Theories of biological similarity; Body mass; Body weight.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602003000300011

Time in physics and biology
Provedor de dados: 48
Autores: GÜNTHER,BRUNO; MORGADO,ENRIQUE.
In contrast with classical physics, particularly with Sir Isaac Newton, where time is a continuous function, generally valid, eternally and evenly flowing as an absolute time dimension, in the biological sciences, time is in essence of cyclical nature (physiological periodicities), where future passes to past through an infinitely thin boundary, the present. In addition, the duration of the present (DP) leads to the so-called 'granulation of time' in living beings, so that by the fusion of two successive pictures of the world, which are not entirely similar, they attain the perception of 'movement,' both in the real world as well as in the sham-movement in the mass media (TV).
Tipo: Journal article
Palavras-chave: Allometric equations; Biological time; Body mass; Physical time; Theory of biological similitude.
Ano: 2004
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602004000500005

Relationship between body mass and body length in capybaras (Hydrochoerus hydrochaeris)
Provedor de dados: 49
Autores: Ferraz,Katia Maria Paschoaletto Micchi de Barros; Bonach,Kelly; Verdade,Luciano Martins.
As a part of a management program we captured 39 capybaras (Hydrochoerus hydrochaeris) in an agroecosystem at the east central region of the State of São Paulo, Brazil from March 2001 to May 2002. Average adult male body mass was 54.1 ± 8.05 kg, and average adult female body mass was 62.0 ± 12.03 kg. Average juvenile male body mass was 23.0 ± 8.28 kg, and average juvenile female body mass was 26.7 ± 5.86 kg. Males and females presented a significant variation in the allometric relation between body mass and body length. Body mass and body length had a high correlation for both adult males and adult females. These results from capybaras in agroecosystem might be relevant for further management programs.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Capybaras; Body mass; Body length; Agroecosystem.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032005000100020

Influence of body mass and environmental oxygen tension on the oxygen consumption rates of an enteropneust, Glossobalanus crozieri
Provedor de dados: 56
Autores: Ditadi,A.S.F.; Mendes,E.G.; Bianconcini,M.S.C.
The present study deals with a species of enteropneust, Glossobalanus crozieri, focusing on two aspects of its respiration: a) oxygen consumption and body mass, and b) the influence of environmental oxygen tension on the respiratory rate. Preliminarily, the body water content was shown to be 85% of the whole body weight. The regression coefficient of the oxygen consumption on the wet body mass (0.578) seems to agree with the view that in enteropneusts respiration is mainly cutaneous. The respiratory rate was significantly reduced at O2 tensions from 76 mmHg downwards, suggesting conformity rather than regulation
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Enteropneusta; Glossobalanus crozieri; Respiration; Body mass; Oxygen tension.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1997001200010