Ecdysteroids, primarily 20-hydroxyecdysone (20E), play a central role in the growth of arthropods. Molecular target of the ecdysteroids is known as a receptor complex composed of ecdysone receptor (EcR) and ultraspiracle (USP) protein. It is important to clarify the expression profile of EcR/USP in crustacean for understanding the endocrine disrupting effects of environmental xenobiotics on cru...

Didelphis virginiana (Virginia Opossum) continues to spread further north into temperate North America, raising questions regarding how they survive harsh winters. Very few marsupials exhibit winter adaptations such as torpor or seasonal molting. We used stable isotopes evaluate evidence of molting in Opossums. serially cut hairs from captive Opossums determine if a documented diet shift early ...

T he nematode worm, C. elegans, sheds its exoskeleton at particular life stages, and Alison Frand believes that understanding this molting process might provide new insights into diseases affecting humans. Some of the potential medical benefi ts lie in the similarities between the worms' exoskeleton and our own skin and connective tissues, while other benefits might lie in the unique aspects of...

Fault bars are common stress-induced feather abnormalities that could produce feather damage thus reducing flight performance. For that reason, it has been hypothesized that birds may have evolved adaptive strategies that reduce the costs of fault bars (the ‘fault bar allocation hypothesis’). An untested prediction of this hypothesis is that fault bars in important feathers for flight (wing and...

After the antennae of Lithobius forficatus were amputated, electrical stimulation of the deutocerebral apex (= antennal lobes) either in the spring or the autumn led to (1) a decrease in the number of regenerated articles, and (2) an increase in the time-lag between the experiment and moulting. Moreover, in the spring experiments, the antennae regenerated asymmetrically. The electrostimulatory ...

1. Polyacrylamide gel electrophoresis (PAGE) in 4% gels of Blatta orientalis larval hemolymph revealed 4 major proteins. 2. Maximum incorporation of [14C]-leucine into total hemolymph protein occurs within 24 hr and is followed by negligible turnover in the next 24 hr. 3. Quantitative PAGE was used to monitor concentration changes during the molting cycle in synchronously molting cultures. 4. A...

Permasalahan yang sering dijumpai dalam budidaya yaitu penggunan pakan komersial cukup tinggi, mencapai sekitar 60-70% dari biaya produksi dikeluarkan. Penelitian ini bertujuan untuk menganalisis pengaruh penambahan daun kelor dan probiotik pada terhadap performa udang vaname. dilaksanakan bulan Juni sampai Juli 2020. Metode penelitian menggunakan RAL dengan 4 perlakuan 3 ulangan yaitu, komersi...

In several vertebrate species evidence supports the hypothesis that carotenoid-based coloration of adults has evolved due to sexual selection. However, in some birds already the nestlings display carotenoid-based coloration. Because the nestling's body plumage is typically moulted before the first reproductive event, sexual selection cannot explain the evolution of these carotenoid-based traits...