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| Registros recuperados: 92 | |
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| ADAM,CAROLINA L.; MAROCHI,MURILO Z.; MASUNARI,SETUKO. |
| ABSTRACT A study on relative growth, sexual dimorphism and ontogenetic trajectory was carried out in a population of the aeglidAegla marginata coming from Barrinha River, Iguape River Basin, Tunas do Paraná, Paraná State, Brazil. The size the of morphological sexual maturity was estimated for males and females. The analysis of sexual dimorphism and ontogenetic trajectory were performed using geometric morphometric technique. Males reach maturity with 10.58 mm of carapace length (CL) and females with 10.38 mm CL. Sexual size dimorphism was only visible among adults, with males reaching larger sizes. This is probably related to the reproductive strategy of males. However, sexual shape dimorphism was found for both juveniles and adults: the posterior region... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allometry; Relative growth; Sexual dimorphism; Shape. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401521 |
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| EISFELD,ALEXIA; VRCIBRADIC,DAVOR. |
| Abstract: We analyzed some aspects of reproduction and sexual dimorphism of the semi-aquatic dipsadid snake Erythrolamprus miliaris in the state of Rio de Janeiro, southeastern Brazil. We detected sexual dimorphism in body size (snout-vent length), with females averaging larger than males, but no sexual dimorphism in the relative length of the tail. Oviductal eggs and secondary follicles were found in all seasons, suggesting that female reproductive cycles are continuous, in spite of the tropical seasonal climate in the region. Reproductive males were present throughout the year, suggesting a continuous cycle for males as well. Clutch size averaged 10.3 ± 4.8 (range 4-21) and there was a positive and significant relationship between clutch size and female... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Forest; Reproduction; Sexual dimorphism; Squamata. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100632 |
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| Araújo,Marina S.L.C.; Barreto,Aline V.; Negromonte,Aurinete O.; Schwamborn,Ralf. |
| This paper aims at describing the population ecology of the swimming crab Callinectes danae Smith, 1869 in one of the most productive estuaries of Brazil, the Santa Cruz Channel. These crabs were monthly collected from January to December/2009 at four stations along the channel, two in the upper and two in the lower estuary. A total of 2373 specimens of C. danae were collected during the study. Males had a larger average carapace width than non-ovigerous females (60.0 ± 15.6 mm and 52.9 ± 12.4 mm, respectively), an adaptation that gives greater protection for females during the copulation. Overall sex ratio did not differ significantly from 1:1. However, evaluating sex-ratio by sampling area, males and juveniles of both sexes occurred preferentially in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachyura; Population biology; Santa Cruz Channel; Sexual dimorphism. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000100013 |
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| Motta-Tavares,Tatiana; Maia-Carneiro,Thiago; Dantas,Leonardo F.; Sluys,Monique Van; Hatano,Fábio H.; Vrcibradic,Davor; Rocha,Carlos F.D.. |
| In this study, we analyzed diet, sexual dimorphism and bromeliad use in three populations of the hylid frog Phyllodytes luteolus from restinga habitats along the Brazilian coast. We found 13 arthropods categories in 161 stomachs. Ants and termites were the dominant prey items. The similar trophic niche across populations suggests this species has a conservative diet. We found sexual dimorphism regarding body size and jaw width. We recordedP. luteolus in five bromeliad species, but predominantly inAechmeablanchetiana (35.6% of individuals recorded). We recorded solitary individuals in 44% of occupied bromeliads, and never found two males sharing the same bromeliad. The data is suggestive that populations ofP. luteolus has a conservative diet independent of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic forest; Bromeliad; Diet; Sexual dimorphism; Territorial behavior. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000100093 |
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| Ferreira,Paulo Sérgio Fiuza; Pires,Evaldo Martins; Guedes,Raul Narciso Carvalho; Mendes,Márcio; Coelho,Lívia Aguiar. |
| A total of 293 specimens of Oxelytrum discicolle were sampled weekly over a period of two years using a black light trap. The study took place in an Atlantic Forest reserve located near Viçosa city, Minas Gerais State, Brazil. The period of peak abundance of O. discicolle occurred during the wet season between the months of October and March. Statistical analysis showed that the abundance of individuals was significantly and positively correlated with temperature, but not with rainfall or relative humidity. Of 28 morphological measurements taken on each collected specimen, seven were found to be sexually dimorphic; however, neither morphology nor the degree of sexual dimorphism varied significantly among seasons. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oxelytrum discicolle; Population dynamic; Sexual dimorphism; Minas Gerais. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032006000200015 |
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| Gava,A.L.; Freitas,F.P.S.; Meyrelles,S.S.; Silva,I.V.; Graceli,J.B.. |
| It is well known that the kidney plays an important role in the development of cardiovascular diseases such as hypertension. The normal aging process leads to changes in kidney morphology, hemodynamics and function, which increase the incidence of cardiovascular events in the elderly population. These disturbances are influenced by several factors, including gender. In general, females are protected by the effects of estrogens on the cardiorenal system. Several studies have demonstrated the beneficial effects of estrogens on renal function in the elderly; however, the relationships between androgens and kidney health during one’s lifetime are not well understood. Sex steroids have many complex actions, and the decline in their levels during aging clearly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sexual dimorphism; Renal function; Aging; Cardiovascular disorders; Sex hormones. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2011000900012 |
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| Registros recuperados: 92 | |
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