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| Registros recuperados: 47 | |
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| Lillo, S.; Céspedes, R.; Ojeda, V.; Saavedra, A.; Díaz, E.; Adasme, L.. |
| El presente estudio tiene como objetivo evaluar el stock de merluza de tres aletas (Micromesistius australis) a través del método hidroacústico, entre las latitudes 47° 00' S y 51° 00' S. Como parte del proyecto, se realizó entre el 2 y el 14 de septiembre de 2004 un crucero de prospección a bordo del B/C Abate Molina, orientado a evaluar mediante un método de evaluación directa (evaluación acústica) su biomasa, abundancia y distribución, junto con estimar la composición de tallas, edad y proporción sexual del stock desovante en el área de estudio. |
| Tipo: Report |
Palavras-chave: Stock assessment; Spawning populations; Echo surveys; Biomass; Geographical distribution; Sex ratio; Age groups; Body size; Stock assessment; Biomass; Geographical distribution; Body size; Sex ratio; Age groups; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_35330; Http://aims.fao.org/aos/agrovoc/c_7014; Http://aims.fao.org/aos/agrovoc/c_28628. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1740 |
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| Bock,Brian C.; Zapata,Ana María; Páez,Vivian P.. |
| We compared adult survivorships in two populations of the lizard Anolis mariarum with different mean and asymptotic body sizes to examine one prediction of age-specific mortality theory; that populations that experience higher adult mortality should exhibit earlier maturation and smaller adult body sizes. We used a maximum likelihood approach to evaluate different survivorship models and model-averaging to estimate survivorship and capture probabilities for each site and sex. Relative tail length did not affect survivorship rates of adults in these two populations, but body size was related to survivorship, with the largest individuals at the time of first capture having lower survivorship rates, so body size was included as a covariate in some of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Survivorship; Body size; Sex differences. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492010000300001 |
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| Cunha,Hélida Ferreira da; Diniz-Filho,José Alexandre Felizola; Brandão,Divino. |
| Abundace and body size distribution of invertebrates of leaf litter in Amazonian forest, Brazil. Based on 605 invertebrates sampled of the litter in an Amazonian Forest, some basic macroecological patterns for this assemblage were described. The relationship between abundance and body size, at logarithmic scale, was triangular, and the distribution of species was constrained in an asymmetric triangular envelope, that was tested using null model procedures in ECOSIM (P= 0,0002). The most abundant species were at an intermediated body size. The relationship between maximum abundance with different mean body size classes confirmed the Energetic Equivalent Rule (b = -1,069; t-0,75 = -2,13; P = 0.079). This way, species tend to consume energy from the community... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abundance; Body size; Energetic Equivalence Rule; Invertebrates; Triangular pattern. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262003000100009 |
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| Peruquetti,Rui Carlos; Del Lama,Marco Antônio. |
| Two populations of the wasp Trypoxylon rogenhoferi Kohl, 1884 from São Carlos and Luís Antônio, State of São Paulo, Brazil, were observed and sampled from May 1999 to February 2001 using trap-nests. This mass-provisioning wasp was used to test some aspects of optimal sex allocation theory. Both populations fit all the predictions of the models of Green and Brockmann and Grafen. Maternal provisions determined the size of each offspring, and females allocated well-stocked brood cells to daughters, the sex that benefits most being large. This strategy resulted in a difference in size between the sexes. In São Carlos, female weight at emergence was 1.18 times that of males, in Luís Antônio this value was 1.13. The brood cell volume was correlated with both... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Body size; Cerrado; Mass provisioning; Sex ratio; Trap-nesting wasp. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262003000400008 |
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| Oliveira,Roseli F.; Silva,Rogério R.; Souza-Campana,Débora R.; Nakano,Márcia A.; Morini,Maria Santina C.. |
| Morphological traits, such as size and shape, may reflect a combination of ecological and evolutionary responses by organisms. Ants have been used to evaluate the relationship between the environment and species coexistence and morphology. In the present study, we analyzed the morphology of workers of Gnamptogenys striatula Mayr in different landscapes from the Atlantic Domain in southeastern Brazil, focusing on the variation in the morphological attributes of these populations compared to those from a dense ombrophilous forest. Eighteen morphological traits of functional importance for interactions between workers and the environment were measured to characterize the size and shape of the workers. In general, the results show that ants of urban areas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological indicators; Atlantic Forest; Body size; Morphometric; Weber's length. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262015000100021 |
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| Ítavo,Luís Carlos Vinhas; Euclides Filho,Kepler; Torres Júnior,Roberto Augusto de Almeida; Ítavo,Camila Celeste Brandão Ferreira; Nogueira,Ériklis; Dias,Alexandre Menezes. |
| The objective was to evaluate the effect of weight, age and production efficiency of cows from genetic groups based on the calf weight at calving and at weaning. For a period of five years, data of 120 cows (60 Angus-Nellore (AN) and 60 Simmental-Nellore (SN)) at four to nine-years of age were evaluated. All cows were maintained on Brachiaria decumbens pastures, with two forage availability levels (high and low), distributed in a randomized-block design. The cows were placed together with Canchim bulls to generate the crossbred calves. A supplement, consisting of 200 g/kg crude protein and 820 g/kg of total digestible nutrients, was provided to the calves in creep feeding until 210 days-old (weaning). Supplement had a significant effect on the weight of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Body size; Calf performance; Crossbreed; Efficiency. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000700390 |
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| CAMUS,PATRICIO A; NAVARRETE,ARTURO H; SANHUEZA,ÁLVARO G; OPAZO,L. FELIPE. |
| Polyplacophorans are common herbivores on rocky shores, but basic aspects of their ecology remain scarcely studied and their role within communities could be more complex than previously considered. Such is the case of Acanthopleura echinata (Barnes), one of the largest and most conspicuous chitons in the world, and at the same time, one of the least known intertidal species in the southeastern Pacific. To improve the basic ecological knowledge of this potentially important intertidal consumer, we studied the diet of A. echinata and its variation among sites of varying levels of coastal upwelling spread over 1000 km along the coast of northern Chile. A seasonal evaluation of diet, body size distribution and density at sites expected to vary in overall... |
| Tipo: Journal article |
Palavras-chave: Body size; Intertidal; Niche breadth; Omnivory; Upwelling. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000100010 |
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| Bidau,Claudio J.; Taffarel,Alberto; Castillo,Elio R.. |
| Sexual size dimorphism (SSD) although a widespread phenomenon among animals, is both enigmatic as to its proximate and ultimate causes and the scaling relationships between SSD and body size (Rensch's rule). We analyzed SSD at the intra- and interspecific levels in a number of representative species and genera of the major orthopteroid orders: Orthoptera, Phasmatodea, Mantodea, Blattodea, Dermaptera, Isoptera, and Mantophasmatodea. The vast majority of the species showed female biased SSD but numerous exceptions occur in cockroaches and earwigs. Rensch's rule and its converse are not common patterns at both, intra-and cross-species level, most species and genera showing an isometric relationship between male and female body sizes. In some but not all... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Body size; Blattodea; Dermaptera; Mantodea; Mantophasmatodea; Morphometric traits; Orthoptera; Phasmatodea; Rensch's rule; Scaling. |
| Ano: 2016 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802016000100002 |
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| Registros recuperados: 47 | |
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