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| Registros recuperados: 47 | |
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| Machado,Renata F; Cerezer,Felipe O; Hendges,Carla D; Cáceres,Nilton C. |
| We evaluated several factors that might be related to the home-range size of felids at both inter and intraspecific levels. At the interspecific level, we tested the influence of body mass on home range size of 19 felid species, while controlling for phylogeny. At the species level, we evaluated the effect of sex and habitat type (open vs. closed) on the home range size of three species of felids occurring in America, Panthera onca, Leopardus pardalis and Puma concolor, which are among the most studied species concerning home ranges. Body mass, sex, and home range data were extracted from the Pantheria database (for 19 species, for interspecific comparisons) and from 48 studies for intraspecifc comparisons. We assessed the influence of body mass on the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pantera onca; Leopardus pardalis; Puma concolor; Sexual dimorphism; Body size; Environment; Territory. |
| Ano: 2017 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2017000300004 |
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| Castillo,Raúl Cueva del. |
| Few theoretical and experimental studies have analyzed the genetic basis of body size dimorphism. Since the evolutionary response to selection depends of the genetic variance in a population it is to be expected that traits under selection would have smaller genetic variance than traits not affected by selection. The evolution of sexual size dimorphism is affected by the genetic correlation between females and males, with the most dimorphic traits showing smaller genetic correlations between the sexes. As result of the differences in the intensity of sexual selection between the sexes, it is expected that the levels of genetic variance would be larger in females than males. I analyzed the genetic additive variance underlying six traits of Acheta... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acheta domesticus; Body size; Dimorphism; Heritability; Sexual selection. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000500030 |
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| Fitz,Raquel C.; Rodenbusch,Cesar A.; Dala-Corte,Renato B.; Azevedo,Marco A.. |
| ABSTRACT Life history traits of Characidium pterostictum Gomes, 1947 (Characiformes, Crenuchidae) from three different reaches of the upper Sinos river, southern Brazil, were described and comparatively analyzed according to the longitudinal gradient. For all reaches, results indicated a seasonal reproductive strategy with a higher intensity during warmer months of higher photoperiod (November to February). Only females were found in the upstream reach and they were more numerous than males in all the sampled reaches. Mean absolute fecundity ranged from 5189 (±2131 SD) to 7394 (±3807 SD), whereas mean relative fecundity (oocytes per mg of female total weight) ranged from 1.08 (±0.40 SD) to 1.12 (±0.29 SD). Oocyte development was characterized as synchronic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fishes; Reproductive period; Size at first maturation; Fecundity; Body size. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212017000100202 |
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| Mouillot, D; Spatharis, S; Reizopoulou, S; Laugier, Thierry; Sabetta, L; Basset, A; Chi, T. |
| 1. Transitional waters, described as critical transition zones because of their position at terrestrial, freshwater and marine interfaces, provide essential goods and services to the biosphere including human populations. These ecotones face increasing human influence mainly due to population density increase in coastal areas. 2. Transitional water bodies have, to date, received little attention in the development of ecological status indicators, this is a critical deficiency when trying to meet the Water Framework Directive objective of all significant water bodies achieving good ecological status by the year 2015. 3. In order to assess changes in transitional water communities many taxonomic-based indicators have already been proposed but there are a... |
| Tipo: Text |
Palavras-chave: Biotic descriptors; Productivity; Functional diversity; Functional traits; Body size; Water Framework Directive WFD. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1849.pdf |
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| Payne, Jonathan L.; Groves, John R.; Jost, Adam B.; Thienan Nguyen,; Moffitt, Sarah E.; Hill, Tessa M.; Skotheim, Jan M.. |
| Atmospheric hyperoxia, with pO2 in excess of 30%, has long been hypothesized to account for late Paleozoic (360250 million years ago) gigantism in numerous higher taxa. However, this hypothesis has not been evaluated statistically because comprehensive size data have not been compiled previously at sufficient temporal resolution to permit quantitative analysis. In this study, we test the hyperoxia-gigantism hypothesis by examining the fossil record of fusulinoidean foraminifers, a dramatic example of protistan gigantism with some individuals exceeding 10 cm in length and exceeding their relatives by six orders of magnitude in biovolume. We assembled and examined comprehensive regional and global, species-level datasets containing 270 and 1823 species,... |
| Tipo: Text |
Palavras-chave: Body size; Carboniferous; Cope's Rule; Foraminifera; Oxygen; Permian. |
| Ano: 2012 |
URL: https://archimer.ifremer.fr/doc/00265/37626/35865.pdf |
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| Roze, Thomas; Christen, Felix; Amerand, Aline; Claireaux, Guy. |
| One outcome of contemporary climate trends is that the involvement of hypoxia and heat tolerance in determining individual fitness will increase in many fish populations. Large fish are believed to be more tolerant to hypoxia than small fish (Nilsson and Ostlund-Nilsson, 2008) whereas thermal sensitivity is thought to decrease with body size (Clark et al., 2008). To better understand the bases of inter-individual variation in environmental adaptation performance, the current study examined hypoxia and heat tolerance in a fast growing (FGS; 288.3 +/- 14.4 g, 26.04 +/- 0.49 cm) and a slow growing (SGS; 119.95 +/- 6.41 g; 20.98 +/- 0.41 cm) strain of 1-year old rainbow trout (Oncorhynchus mykiss). This examination was conducted using two standardized... |
| Tipo: Text |
Palavras-chave: Fish; Hypoxia; Temperature; Trade-off; Growth; Body size. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00130/24104/22371.pdf |
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| Paredes, Rosana; Orben, Rachael A.; Roby, Daniel D.; Irons, David B.; Young, Rebecca; Renner, Heather; Tremblay, Yann; Will, Alexis; Harding, Ann M. A.; Kitaysky, Alexander S.. |
| Causes and consequences of differences in seabird foraging strategies between breeding colonies are not well understood. We tested whether body size of a pursuit-diving seabird, the thick-billed murre Uria lomvia, differs between breeding colonies and, if so, how size differences can be understood in the context of differences in foraging behavior, habitat use, and breeding performance. We measured adult murres over 3 seasons (2008 to 2010) at 2 of the Pribilof Islands, St. Paul and St. George, located on the continental shelf of the Bering Sea at different distances from the shelf break. Body mass and size were positively associated with deep diving and negatively associated with long flights, suggesting morphology influences foraging and commuting... |
| Tipo: Text |
Palavras-chave: Body size; Foraging; Diving; Marine habitats; Stress levels; Bering Sea; Murres; Seabirds. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00626/73837/73678.pdf |
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| Monaco, Cristian; Wethey, David S.; Gulledge, Shadow; Helmuth, Brian. |
| The body size of a mobile intertidal invertebrate can determine its access to different microhabitats, and thus alter its exposure to environmental stressors. We surveyed a rocky intertidal keystone predator, the sea star Pisaster ochraceus, and characterized size-dependent distribution, defined by individuals' shore level and refuge use. At 2 field sites (in California and Oregon, USA) we examined temporal and geographical variability in habitat selection. We evaluated the hypothesis that environmental drivers measured on-site and body temperatures measured using biomimetic sensors (i.e. 'robo-sea stars'), explained the observed distribution patterns, including shore-level size gradients, with larger animals lower on the shore. We tested the effect of... |
| Tipo: Text |
Palavras-chave: Ecology; Physiology; Rocky intertidal; Environmental stress; Climate change; Temperature; Desiccation; Solar radiation; Body size; Behavior. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00605/71695/70137.pdf |
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| Moriarty, M.; Sell, A. F.; Trenkel, Verena; Lynam, C. P.; Burns, F.; Clarke, E. D.; Greenstreet, S. P. R.; Mcgonigle, C.. |
| An experiment during a fisheries independent survey in the North Sea was conducted to test whether sampling effort could be reduced without a significant loss in data precision. To examine potential effects of reducing tow duration from the standard 30 min to a proposed 15 min estimates of species encounter rates, species richness, and estimates of abundance, biomass, and body size were analysed. Results show species richness estimates are lower in the short tow category. While biomass and abundance at length and body size are significantly affected by the change in tow duration, estimates of Large Fish Indicator, the Typical length and Mean-max length are not significantly affected by the regime change. The results presented here suggest that a reduction... |
| Tipo: Text |
Palavras-chave: Abundance; Biomass; Body size; Fisheries independent survey; IBTS; International Bottom Trawl Survey; Linear mixed model; North Sea; Species diversity. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00439/55028/60477.pdf |
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| Olawunmi,O. O; Salako,A. E; Afuwape,A. A. |
| Data on bodyweight and 11 body measurements were taken on 51 Fulani and 101 Yoruba ecotype chicken from two central poultry markets: Ilorin in the middle belt and Ibadan in the southwest región of Nigeria, respectively. The aim was to provide baseline information on size characteristics of Fulani and Yoruba ecotype chickens, differentiate between the types and use the morphometrical variables for a preliminary assessment of type and function. Results showed that least square means of live weight, wing and shank length, body, thigh and toe length, beak length and breast breadth of the Fulani ecotype were generally higher (P < 0.01) than those of the Yoruba ecotype. The males were also superior (P < 0.01) to the females for comb, wing, shank length and... |
| Tipo: Journal article |
Palavras-chave: Body size; Yoruba and Fulani chickens; Body measurements; Function. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022008000400032 |
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| Yakubu,A; Musa-Azara,I. S. |
| Body size and testicular measurements have been found to be important parameters utilized in breeding soundness evaluation. The present study therefore, aimed at determining the relationship between body weight (BW), body condition score (BCS), testicular length (TL), testicular diameter (TD) and scrotal circumference (SC) in 120 extensively reared Yankasa rams (approximately 30 months old) using linear, quadratic and cubic predictive models. Coefficient of determination (R2), Adjusted R2, the estimate of Mallows' Cp, RMSE (Root mean squares error) and the parsimony principle (p=number of parameters) were used to compare the efficiency of the different models. Strong Pearson's correlation coefficients (r = 0.83-0.94; P<0.01) were found between BW, TL,... |
| Tipo: Journal article |
Palavras-chave: Body size; Body condition; Testicular measurements; Rams; Regression models. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000400036 |
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| Yakubu,A; Ayoade,J. A. |
| Body weight and four morphostructural traits namely body length, heart girth, thigh circumference and ear length of 103 New Zealand White x Chinchilla crossbred rabbits were measured. The investigation aimed at describing objectively the interdependence among conformation traits and to predict body weight from their independent factor scores using principal component analysis. Phenotypic correlations between body weight and body dimensions were highly significant (r=0.61 0.91; P<0.01). Pairwise correlations of the body shape characters ranged from moderate to high values. From the factor analysis with varimax rotation of the intercorrelated traits, two principal components which accounted for 90.27% of the total variance were extracted. The first... |
| Tipo: Journal article |
Palavras-chave: Body size; Growth; Rabbits. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022009000400009 |
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| Jiménez-Arenas,Juan Manuel. |
| The functional significance of teeth size, specifically postcanine tooth size has contributed a vast amount of scientific literature. Nevertheless, these studies have been based on 'equivalence between exponents'. That is, when the tooth size scales to the 0.75 power of body size exponent is interpreted as reflecting differences in metabolic requirements. On the contrary, if the obtained exponent is close to isometry, such slope is interpreted as that variation in teeth size is an incidental consequence of body size variation. In this paper, we show the results of a study in which the relationship between postcanine tooth occlusal area (PCOA) and basal metabolic rate (BMR) has been evaluated in 28 primate species. On one hand, the results obtained indicate... |
| Tipo: Journal article |
Palavras-chave: Postcanine tooth size; Basal metabolic rate; Allometry; Body size. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000400008 |
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| Gião,Juliana Z.; Godoy,Wesley A.C.. |
| In this study the seasonal variation of fecundity, wing and tibia sizes were investigated in natural populations of Lucilia eximia (Wiedemann) as an attempt to determine the variations in life history of the species associated to seasonality. Specimens of L. eximia were monthly collected in Botucatu, São Paulo, Brazil, during two years and the adult females dissected to estimate fecundity. Body size was estimated by measuring wing and tibia. Fecundity and body size were seasonally analysed. A relatively constant temporal trajectory was found for fecundity, wing and tibia size over twenty-four months. Strong positive correlations between wing and tibia size, fecundity and wing and fecundity and tibia were observed. The maintenance of stable values in L.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Blowfly; Fecundity; Body size. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000600005 |
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| Registros recuperados: 47 | |
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