Results 11 to 20 of about 4,134 (299)

Energia digestível para larvas de tilápia-do-nilo (Oreochromis niloticus) na fase de reversão sexual Digestible energy for nile tilapia (Oreochromis niloticus) larvae in the sexual reversion phase [PDF]

Revista Brasileira de Zootecnia, 2005
Este trabalho foi realizado com o objetivo de se avaliar o efeito de diferentes níveis de energia digestível na ração sobre o desempenho de larvas de tilápia-do-nilo (Oreochromis niloticus), durante a fase de reversão sexual.
Wilson Rogério Boscolo, Altevir Signor, Aldi Feiden, Robie Allan Bombardelli, Arcangelo Augusto Signor, Adilson Reidel   +5 more
doaj   +2 more sources

PHENOMENON OF FLORAL REVERSION IN BOLTING GARLIC (Allium sativum L.)

Acta Scientiarum Polonorum: Hortorum Cultus, 2018
In this study, we present investigations of morphological changes in the inflorescence of bolting Allium sativum L., which forms umbel-like inflorescences with small, inconspicuous flowers, bulbils, and leaf-like membranous bracts.
Krystyna Winiarczyk, Rafał Marciniec, Dorota Tchórzewska   +2 more
doaj   +4 more sources

Farinha de vísceras de aves em rações para a tilápia do Nilo (Oreochromis niloticus L.) durante a fase de reversão sexual Poultry meal by-products in diets for Nile tilapia (Oreochromis niloticus L.) in the reversion phase

Revista Brasileira de Zootecnia, 2005
Neste trabalho, objetivou-se avaliar o desempenho, a sobrevivência e a efetividade de reversão de larvas de tilápia do Nilo (Oreochromis niloticus L.) alimentadas com rações contendo níveis crescentes de inclusão de farinha de vísceras de aves (FVA ...
Wilson Rogério Boscolo, Fábio Meurer, Aldi Feiden, Carmino Hayashi, Adilson Reidel, André Luis Genteline   +5 more
doaj   +2 more sources

Probiotic with yeast in Nile tilapia feeding during the sexual reversion period cultivated in water of tank of fish culture Probiótico com levedura na alimentação da tilápia do Nilo, durante o período de reversão sexual, cultivada em água de tanque de cultivo

Revista Brasileira de Saúde e Produção Animal, 2009
This experiment objectified to evaluate the Saccharomyces cerevisiae as probiotic in rations for the Nile tilapia (Oreochromis niloticus) during sexual reversion period.
Arthur dos Santos Mascioli, Leda Maria Saragiotto Colpini, Mateus Matiuzzi da Costa, Mariana Sá e Silva, Fábio Meurer   +4 more
doaj   +1 more source

Extreme Reversed Sexual Dichromatism in a Bird Without Sex Role Reversal [PDF]

Science, 2005
Brilliant plumage is typical of male birds, reflecting differential enhancement of male traits when females are the limiting sex. Brighter females are thought to evolve exclusively in response to sex role reversal. The striking reversed plumage dichromatism of Eclectus roratus parrots does not fit this pattern.
Heinsohn, Robert, Legge, Sarah, Endler, John A.   +2 more
openaire   +6 more sources

Sexual Conflict: The Battle of the Sexes Reversed [PDF]

Current Biology, 2008
In most species one sex is more reluctant to mate than the other. Standard explanations invoking potential reproductive rates have shortcomings that are illustrated by a new study of eager female and reluctant male antelopes.
Kokko, Hanna, Jennions, Michael
openaire   +3 more sources

Switches, stability and reversals in the evolutionary history of sexual systems in fish [PDF]

Nature Communications, 2021
Abstract Sexual systems are highly diverse and have profound consequences for population dynamics and resilience. Yet, little is known about how they evolved. Using phylogenetic Bayesian modelling and a sample of 4614 species, we show that gonochorism is the likely ancestral condition in teleost fish.
Susanna Pla, Chiara Benvenuto, Isabella Capellini, Francesc Piferrer   +3 more
openaire   +7 more sources

Epigenetic modification and inheritance in sexual reversal of fish [PDF]

Genome Research, 2014
Environmental sex determination (ESD) occurs in divergent, phylogenetically unrelated taxa, and in some species, co-occurs with genetic sex determination (GSD) mechanisms. Although epigenetic regulation in response to environmental effects has long been proposed to be associated with ESD, a systemic analysis on epigenetic regulation of ESD is still ...
Shao, Changwei, Li, Qiye, Chen, Songlin, Zhang, Pei, Lian, Jinmin, Hu, Qiaomu, Sun, Bing, Jin, Lijun, Liu, Shanshan, Wang, Zongji, Zhao, Hongmei, Jin, Zonghui, Liang, Zhuo, Li, Yangzhen, Zheng, Qiumei, Zhang, Yong, Wang, Jun, Zhang, Guojie   +17 more
openaire   +4 more sources

Secondary reversion to sexual monomorphism associated with tissue‐specific loss of doublesex expression [PDF]

, 2022
Animal evolution is characterized by frequent turnover of sexually dimorphic traits-new sex-specific characters are gained, and some ancestral sex-specific characters are lost, in many lineages.
Artyom Kopp, Thompson, Ammon, Tanaka, Kohtaro, Suvorov, Anton, Gao, Jian‐jun, Masanori J. Toda, Kohtaro Tanaka, Toda, Masanori J, Chen, Ji‐Min, Kopp, Artyom, Hideaki Watabe, Barmina, Olga, Ji‐Min Chen, Olga Barmina, Bernard Y. Kim, Kim, Bernard Y, Katoh, Takehiro K, Ammon Thompson, Takehiro K. Katoh, Watabe, Hideaki, Anton Suvorov, Jian‐jun Gao   +21 more
core   +1 more source

Reversed Sexual Conflict in a Promiscuous Antelope [PDF]

Current Biology, 2007
A general tenet of sexual conflict theory is that males have higher optimum mating rates than do females and therefore should be more persistent when it comes to mating. However, in promiscuous species, females might benefit from high mating rates as a result of increased conception probability with favored males, whereas favored males benefit from ...
openaire   +2 more sources