Results 61 to 70 of about 789 (197)

Effect of Force Molting on Postmolt Performance of Laying Hens

International Journal of Poultry Science, 2007
An experiment was conducted using 6168 Hyline White hens (79 wk of age) randomly assigned to two dietary treatments. The treatments included high dietary zinc (Zn) and Feed Withdrawal (FW) methods. In the Zn method, hens were fed a layer ration containing 20,000 ppm of zinc as zinc oxide for 10 d and the light was reduced to 12 h/d.
A. Hassanabad, H. Kermanshah
openaire   +1 more source

Unravelling Evolutionary Dynamics of Female Sexual Cannibalism and Male Reproductive Strategies in Spiders

Integrative Zoology, EarlyView.
Sexual cannibalism (SC), where one mating partner consumes the other in the context of mating, is especially prevalent among spiders. However, the evolution of SC in spiders is still not fully understood. We review key hypotheses for SC and explore how female‐initiated SC has driven the evolution of various male counter‐adaptations to mitigate its ...
Simona Kralj‐Fišer, Franco Cargnelutti, Daiqin Li, Matjaž Kuntner   +3 more
wiley   +1 more source

Hubungan antara Penurunan Bobot Badan dan Peningkatan Produksi Ayam Petelur (Dekalb

Jurnal Veteriner, 2010
The aim of the research is to study the correlation between the decreased of body weight asand the increase of egg production, after the forced molting stress program. As many as 180medium type chickens, strain Dekalb Warren, aged 84 weeks old were used.
Razak Achmad, Yuhara Sukra, Barizi -, Arnold P Sinurat   +3 more
doaj  

Desempenho e qualidade dos ovos de poedeiras comerciais no segundo ciclo de produção consumindo gérmen integral de milho Performance and egg quality of laying hens after molting (78 to 90 weeks of age) fed corn germ meal

Revista Brasileira de Zootecnia, 2009
O experimento foi conduzido com o objetivo de avaliar o desempenho e a qualidade dos ovos de poedeiras comerciais no segundo ciclo de produção consumindo gérmen integral de milho em substituição ao milho da dieta.
Alexandre Barbosa de Brito, José Henrique Stringhini, Suzany Aparecida Gomes Xavier, Marcos Barcellos Café, Nadja Susana Mogyca Leandro   +4 more
doaj   +1 more source

Extreme Silk Toughness in Caerostris Spiders Is Limited to Adult Females

Integrative Zoology, EarlyView.
We ask whether species with exceptionally tough silk, like Caerostris bark spiders, show different developmental patterns in silk toughness between ontogenetic stages and sexes. We found that only large females produce exceptionally tough silk with higher initial stiffness, while juvenile females as well as adult and juvenile males produce inferior ...
Matjaž Gregorič, Kuang‐Ping Yu, Jeremia Ravelojaona, Todd A. Blackledge, Matjaž Kuntner   +4 more
wiley   +1 more source

Laboratory Biology, Immature and Adult Morphology of Trichopria drosophilae (Perkins) (Hymenoptera: Diapriidae), Parasitoids of Drosophila Flies

Entomologia Experimentalis et Applicata, EarlyView.
This study investigates the laboratory biology and morphology of the parasitoid Trichopria drosophilae, which targets Drosophila flies, including the invasive Drosophila suzukii. Key findings include a detailed description of the parasitoid's egg, three larval instars, and pupal stage, as well as unique behaviors such as siblicide and encapsulation in ...
Alex Gumovsky, Jana Collatz, Lesia Tymochko, Lars Krogmann   +3 more
wiley   +1 more source

Flooding affects fluctuating asymmetry but not growth of a riparian orbweaving spider

Ecological Entomology, EarlyView.
In a mesocosm experiment we assessed the impact of flood on aquatic insect emergence and on spider development using geometric morphometric analysis of fluctuating asymmetry. We observed 45% higher emergence in flooded mesocosm throughout the season. Spiders did not grow bigger but exhibited ~15% lower fluctuating asymmetry than in controls.
Stephane Mutel, Martin H. Entling, Ken M. Mauser, Federica Spani, Celia Thomas, Collins Ogbeide, Mirco Bundschuh, Franziska Fiolka, Franziska Middendorf, Ralf Schulz, Alessandro Manfrin   +10 more
wiley   +1 more source

Exigência nutricional de metionina+cistina para galinhas poedeiras de ovos brancos e marrons, no segundo ciclo de produção: 1. características produtivas Nutritional requirements of methionine+cystine by white-egg and brown-egg layer hens in the second production cycle: 1. productive traits

Revista Brasileira de Zootecnia, 1999
Um experimento foi realizado para estabelecer as exigências nutricionais de metionina+cistina (Met+Cis) por galinhas poedeiras de ovos brancos e marrons, no segundo ciclo de produção.
Breno Augusto Campolina Barbosa, Paulo Rubens Soares, Horacio Santiago Rostagno, Martinho de Almeida e Silva, Luiz Fernando Teixeira Albino, Altair Soares das Graças   +5 more
doaj   +1 more source

Preimaginal development of Aedes aegypti L. (Diptera: Culicidae) in brackish water gives rise to adult mosquitoes with thicker cuticles and greater insecticide resistance

Medical and Veterinary Entomology, EarlyView.
The principal arboviral vector Aedes aegypti can develop in coastal brackish water field habitats (0.5–15 g/L salt) with larvae possessing thicker cuticles and greater resistance to the larvicide Temephos. Females emerging from brackish water‐developing preimaginal stages are now shown to have thicker and remodelled leg and abdominal cuticles and ...
Kokila Sivabalakrishnan, Andrew Hemphill, S. H. P. Parakrama Karunaratne, Arunasalam Naguleswaran, Isabel Roditi, Sinnathamby N. Surendran, Ranjan Ramasamy   +6 more
wiley   +1 more source

Postembryonic development of the predatory strike mechanics in a praying mantis (Insecta: Mantodea)

Physiological Entomology, EarlyView.
Praying mantis forelegs capture prey using specific kinematic and kinetic traits that change in size and morphology during postembryonic growth and sexual dimorphism influences these dynamics. Strike forces grow hyperallometrically with body weight; larger mantises show longer strike durations, slower joint angular velocities and increased tibia ...
Thies H. Büscher, Fabian Bäumler, Stanislav N. Gorb, Sebastian Büsse   +3 more
wiley   +1 more source