Mating Frequency
Mostrando 1-12 de 271 artigos, teses e dissertações.
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1. Grooming behaviors and fouling of the spider crab Libinia dubia (Decapoda: Epialtidae)
Abstract Body fouling has been reduced by grooming behaviors. In decapods, grooming has been focused on gills, sensory structures, and jointed appendages. In this study, grooming behaviors of the spider crab, Libinia dubia H. Milne-Edwards, 1834, were examined; this brachyuran crab decorates and camouflages body regions by attaching materials onto hooked set
Nauplius. Publicado em: 01/08/2019
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2. Effect of feeding frequency on the reproductive efficiency of two species of Triatoma with different epidemiological importance
Introduction In Triatominae, reproductive efficiency is an important factor influencing population dynamics, and a useful parameter in measuring a species' epidemiological significance as a vector of Trypanosoma cruzi (Chagas, 1909). The reproductive efficiency of triatomines is affected by food availability; hence, we measured and compared the effects of f
Rev. Soc. Bras. Med. Trop.. Publicado em: 2014-08
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3. Indirect evidence of predation and intraspecific agression in three sympatric lizard species from a semi-arid area in northeastern Brazil
We analyzed the frequency of tail autotomy, toe amputation and integument scars in three sympatric lizard species, Ameivula ocellifera, Tropidurus hispidus and T. semitaeniatus, from a Neotropical area of semi-arid Caatinga, in northeastern Brazil. We evaluated intraspecific differences in the frequency of injuries between the sexes within each species. Only
Zoologia (Curitiba). Publicado em: 2013-08
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4. Testicular shape and andrological aspects of young Nellore bulls under extensive farming
Aiming to determine the relationship between the frequency of testicular shape and the andrological aspects in young Nellore bulls, 18,676 animals were assessed. All andrological examinations were performed between the years 2000 and 2008. Animals were classified as able for breeding, able for breeding in natural mating system, unable for breeding and discar
Revista Brasileira de Zootecnia. Publicado em: 2012-03
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5. Abelhas visitantes florais, potenciais polinizadoras do algodoeiro (Gossypium hirsutum L.) em cultivo agroecolÃgico / Bees floral visitors, potential pollinators of cotton (Gossypium hirsutum L.) in agro-ecological farming
This study was conducted in July 2010 in the town of ChorÃ- CE, to evaluate the bees visiting the flowers of cotton (Gossypium hirsutum L. cv. CNPA - 7MH) in two agroecological crops. To do so, assessed the diversity of insects in two areas, their frequency, foraging behavior and potential pollinators of the culture, and studied the floral biology and polli
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/07/2011
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6. Estrutura genética, agressividade e sensibilidade a fungicidas de populações de Phytophthora infestans das regiões sul e sudeste do Brasil / Genetic structure, aggressiveness and fungicide sensitivity of Phytophthora infestans populations from the south and southeast regions of Brazil
The knowledge about the genetic structure, aggressiveness and sensitivity to fungicides of the current population of Phytophthora infestans can be useful to delineate strategies for the management of potato and tomato late blight. A total of 166 isolates were collected from six states of Brazil, in three periods: 1998/2000, 2003/2005 and 2008/2010. The isola
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/11/2010
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7. Especiação sem barreiras e padrões de diversidade / Speciation without barriers and diversity petterns
Nesse trabalho, estudamos doismecanismos de formação de espécies. No primeiro deles, consideramos um modelo espacial de especiação neutra totalmente probabilístico, sem barreiras geográficas ou interações ecológicas. A população evolui devido a influência de reprodução sexuada, mutações e recombinação. O modelo é baseado em acasalamento s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/06/2010
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8. Frequency of spermatophore production and regeneration in the males of Tityus (Atreus) magnimanus Pocock, 1897 (Scorpiones, Buthidae)
The frequency of spermatophore production and the amount of time between matings for laboratory-reared males of Tityus (Atreus) magnimanus to regenerate spermatophores were examined. Males attain sexual maturity at the fifth or sixth instar (after a period of 137 to 155 days) and can produce initial spermatophores shortly after maturation. After mating, male
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2009
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9. Influência da recópula de fêmeas selvagens de Ceratitis capitata (Wied., 1824) (Diptera: Tephritidae) na eficiência da técnica do inseto estéril / Influence of wild Ceratitis capitata (Wied., 1824) (Diptera: Tephritidae) females remating on the efficiency of the sterile insect technique
The sterile insect technique (SIT) aim at the induction of sterility in wild females by mating with sterile males released in great amounts in the field. These released males must compete with wild ones being able to attract and mate wild females, fertilize their eggs and avoid remating with a wild male that would lead to fertile eggs and consequently reduce
Publicado em: 2009
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10. Effects of exposure to urban PM2.5 from air pollution in spermatogenesis of two generations of mice / Efeito da exposição ao material particulado (PM2,5) da poluição atmosférica na espermatogênese de duas gerações de camundongos
The present paper describes the effects of real exposure to urban PM2.5 on spermatogenesis by histological analysis of testes of mice (BALB/c) from two generations during fetal or postnatal phases of development and of mice exposed in both phases of development. Parental generations (BALB/c mice) were exposed to air pollution in chambers with or without filt
Publicado em: 2009
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11. Construtivismo integrativo: estudos sobre instinto, afeto e cognição / Integrative Constructivism: studies upon instinct, affect and cognition
Integrative Constructivism, as presented in this paper seeks to contribute to the creation of broader theoretical models of interindividual and social psychodynamic processes. Our mainstream basis is the theory developed by Jean Piaget (1896-1980), as arising from two of his main approaches: 1. The integrative and systemic comprehension of biological life an
Publicado em: 2009
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12. Influência da insulina exógena em diferentes doses sobre os parâmetros reprodutivos de cabras nulíparas da raça Anglo-nubiana. / Influence of exogenous insulin in different doses on the reproductive parameters of nulliparous goats of Anglo-nubian.
Thirty-nine nulliparous and cyclic Anglo-nubian goats were synchronized using 60 mg MPA (Progespon, Syntex, Argentina) vaginal sponge for 10 days associated with an luteolytic treatment 50 μg cloprostenol, 48 h before sponge removal (SR). Goats were allocated in three groups: Insulin I (n=13), Insulin II (n=13) and Control (n=13). In Insulin I and II gr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/07/2008