Crustacean reproduction is regulated by a complex chain of hormonal interactions in which the crustacean hyperglycaemic hormones A and B (CHH-A and CHH-B) and the gonad-inhibiting hormone (GIH) play a primary role. These neurohormones are produced in the same neuroendocrine cells of the X-organ sinus gland complex, situated in the eyestalks of the American lobster, Homarus americanus. In order ...

The excessive and indiscriminate uses of synthetic insecticides usually lead to many problems human health, environment economics. Therefore, it is a prerequisite search for safe alternatives among which plant extracts products represent effective materials pest control. main goal the present article was searching new control insect pests via disruptive effects these on haemogram immune paramet...

Current study explored the acute toxicity and oxidative stress of ammonia-N on Macrobrachium rosenbergii. Prawns were exposed to at 3.01, 3.55, 4.18, 4.92, 5.80, 6.82, 8.04 mg·L−1 for a 96 h test. In subsequent sublethal text, they 0.5 or 1.88 (1/2 LC50) 3, 8, 12, 24, 48, 72 h. The total superoxide dismutase (T-SOD) activity, catalase (CAT) activity malondialdehyde (MDA) content detected in mus...

Influence of magnetic field on biological system has been reported. The study reveals effect of magnetization of Bombyx mori larvae on the total protein content level in the silk gland, fat body and haemolymph of fifth instar larvae. First instar larvae were magnetized in 1000, 2000, 3000 and 4000 Gauss magnetic field for 30 minutes in a day till first moulting. Variation in the strength of mag...

Samia cynthia ricini (Lepidoptera: Saturniidae) is an important commercial silk-producing insect; however, in contrast to the silkworm, mulberry leaves are toxic to this insect because the leaves contain the component 1-deoxynojirimycin (DNJ). A transcriptomic analysis of eri-silkworm haemolymph was conducted to examine the genes related to different metabolic pathways and to elucidate the mole...

A better knowledge of the physiological basis of salinity tolerance is essential to understanding the ecology and evolutionary history of organisms that have colonized inland saline waters. Coleoptera are amongst the most diverse macroinvertebrates in inland waters, including saline habitats; however, the osmoregulatory strategies they employ to deal with osmotic stress remain unexplored. Survi...

The nervous system of the opisthobranch mollusc, Aplysia califomica Cooper has been extensively studied and a great deal is known about the electrophysiological properties of a number of identifiable neurones (see Kandel, 1976, 1979). A variety of synaptic and electrical connections have been mapped, permitting identification of the mode in which nervous control is exerted over certain motor fu...

The transport of ammonia by various tissues throughout the body is of fundamental importance for nitrogen excretion in invertebrates, yet sites and mechanisms of ammonia transport are not presently well understood. In this thesis a novel ammonium-selective microelectrode was developed using the crown ether ionophore TD19C6, which is approximately 3800-fold more selective for NH 4 + than Na + co...

Article history: Received on: 24/04/2015 Revised on: 14/05/2015 Accepted on: 04/06/2015 Available online: 20/06/2015 Ageing is a natural life process whose manifestations are familiar and unambiguous. Oxidative modification of cellular molecules by reactive oxygen species and impaired antioxidant mechanism play unique role in a variety of age-associated degenerations. As a defence, cells have d...