Parasitic infections consist of a succession of steps during which hosts and parasites interact in specific manners. At each step, hosts can use diverse defence mechanisms to counteract the parasite's attempts to invade and exploit them. Of these steps, the penetration of parasites into the host is a key step for a successful infection and the epithelium is the first line of host defence. The s...

Insects are enclosed in a rigid exoskeleton, providing protection from desiccation and mechanical injury. To allow growth, this armour needs to be replaced regularly in a process called moulting. Moulting entails the production of a new exoskeleton and shedding of the old one and is induced by a pulse in ecdysteroids, which activates a peptide-mediated signalling cascade. In Holometabola, ecdys...

We investigated the juvenile development of the calanoid copepod Acrocalanus gracilis in the Timor Sea. The development was characterized by the calculation of stage-specific duration, median development time, moulting period duration, moult and growth rates. The morphometry of the experimental and wild populations were compared. Food concentrations in the experiment were lower than those in th...

This study aims to determine the effect of feeding containing ecdysteroid hormones increase growth and reproduction mangrove crabs so as produce optimal crabs. research was conducted from August October 2021 at Hatchery Cultivation Technology Laboratory. The method used in this a non-factorial completely randomized design (CRD) with 4 treatments 3 replications, addition hormone 5.50 ml, 7.50 9....

Lobster air tawar (Cerax quadricarinatus) merupakan salah satu jenis udang yang banyak dibudidayakan di Indonesia serta negara-negara lain seperti Australia, Amerika dan Inggris.Harga jual cukup tinggi dari lobster sendiri masih belum sebanding dengan lamanya pemeliharaan memerlukan waktu 6 – 12 bulan untuk ukuran 50 150 gram/ekor, tingkat mortalitas mencapai 30 %.. Tujuan penelitian mengetahui...