Asian carp eggs are semi-buoyant and must remain suspended in the water to survive, supported by the turbulence of the flow, until they hatch and develop the ability to swim. Analysis of the transport and dispersal patterns of Asian carp eggs will facilitate the development and implementation of control strategies to target the early life stages. Experimenting with Asian carp eggs is complicate...

OBJECTIVE Stripe marks, which occasionally occur on the shell, do not cause breakage to the shell and shell membranes of eggs. This study investigated the quality of intact eggs (IEs), minor stripe-marked eggs (MEs), severe stripe-marked eggs (SEs), and cracked eggs (CEs) during 3-week storage at 25°C. METHODS Shell eggs were collected the day after being laid and were washed. Among them, egg...

Studies were undertaken to determine the ovicidal efficacy of 5,5'-dimethyl-2,2'-bipyridyl (abametapir) against eggs of both human head and body lice. Head lice eggs of different ages (0-2, 3-5, and 6-8-d-old eggs) were exposed to varying concentrations of abametapir in isopropanol and concentration-dependent response relationships established based on egg hatch. One hundred percent of all abam...

JAXA studies the new locomotion concept using tethers for the requests of unmanned support system for astronauts and the robot demonstration on the orbit will be planned in 2012, called Robot Experiment on JEM/ISS (REX-J). This paper introduces the details of REX-J project and explains the proposal locomotion method called the tether based locomotion. The tether based locomotion is defined as a...

Hen eggs injected with either sodium monofluoroacetate (1080) or diphacinone are being used by the Department of Conservation for the control of stoats (Mustela erminea ). The eggs remain attractive to stoats for at least 1 month. This study investigates the persistence of the toxins in eggs incubated at two temperatures of 1080 in eggs incubated at both temperatures and the amount of diphacino...

Present study was conducted to evaluate the quality traits of poultry eggs collected from various sources i.e. market, commercial farm and backyard farming, in Karachi. A total of 250 eggs were analyzed for external and internal qualities. A significant difference (p <0.05) was recorded in quality parameters except percent shell, shell thickness, egg width, egg weight, shape index and Haugh uni...

reproduction parameters for helicoverpa armigera (hübner) were determined and compared on 13 soybean varieties (dpx, l17, bp, clark, jk, 356, m4, m7, m9, gorgan3, sahar, zane and williams) at 25±1ºc, 65±5% rh over a photoperiod of 16:8 (l:d) hours. reproduction parameters were estimated for individual newly emerged moths, which had spent their immature stages on different soybean varieties. the...

Clonorchis sinensis is a carcinogenic human liver fluke. The present study monitored eggs produced by long-term maintained adult worms of C. sinensis to confirm their egg productivity in vitro. The worms from infected rabbits were incubated in vitro in 1× Locke's solution and broth media (RPMI-1640, DMEM and IMDM). Numbers of expelled eggs were counted sequentially and their morphological chang...

Recent work [Ecoscience (2000) vol. 7, 395-397] suggests that the burying beetle Nicrophorus pustulatus may have undergone a remarkable host shift, exploiting snake eggs rather than carrion as resources for breeding. We conducted behavioural and physiological experiments to examine the hypothesis of a host shift and to formulate hypotheses on its origin. Two congeners of N. pustulatus, Nicropho...

Brood parasitism in birds is one of the best examples of coevolutionary interactions in vertebrates. Coevolution between hosts and parasites is assumed to occur because the parasite imposes strong selection pressures on its hosts, reducing their fitness and thereby favouring counter-adaptations (e.g. egg rejection) which, in turn, select for parasite resistance (e.g. egg mimicry). Great spotted...