The photoprotector role of pigment dispersion in the melanophores of the crab, Chasmagnathus granulata, against DNA and oxidative damages caused by UV-A and UV-B was investigated.Intact and eyestalkless crabs were used. ...

Neohelice granulata (Chasmagnathus granulatus) is an intertidal crab species living in salt marshes from estuaries and lagoons along the Atlantic coast of South America. It is a key species in these environments because ...

Neohelice granulata (Chasmagnathus granulatus) is an intertidal crab species living in salt marshes from estuaries and lagoons along the Atlantic coast of South America. It is a key species in these environments because ...

Biomarkers of exposure and effect of pollutants were analyzed in croakers Micropogonias furnieri (Teleostei: Sciaenidae) captured in winter and summer in a polluted and in a non-polluted site at the Patos Lagoon estuary ...

The circadian rhythm of black pigment migration of melanophores of the crab Chasmagnathus granulata and the variation in responsiveness of these cells to pigment-dispersing hormone (h-PDH), crustacean cardioactive peptide ...

In January of 2003, a cyanobacterial bloom in the Patos Lagoon (Southern Brazil) (32 050S–52 120W) was observed. Water samples were taken to identify the composition and abundance of the bloom, as well as the occurrence ...

This study identified daily variations in oxygen consumption, antioxidant-defense system, and lipoperoxidation in the gills and hepatopancreas of the crab Chasmagnathus granulata (Dana, 1851) (Decapoda,Brachyura). In gills, ...

In vertebrates, many studies verified different effects of melatonin in the antioxidant defense system (ADS). In crustaceans, few studies have been conducted to verify this possibility. We verified the melatonin effects ...

Numerous studies have shown that melatonin exerts some influence on the antioxidant defense system (ADS) in vertebrates, but for crustaceans no such effect has been demonstrated till now. However,earlier reports did show ...

Decapod crustaceans show proliferation of the nerve cells in the olfactory lobe throughout their lives. However, the regulation of this process is still poorly understood, since it may vary with endogenous and exogenous factors. ...

Effects of the branchial ectoparasite isopod Probopyrus ringueleti on the utilization of glucose, glycogen and total lipids on starved shrimp Palaemonetes argentinus were evaluated, as well as the isopod responses to host ...

The aim of the present study was to determine the kinetic parameters and cholinesterase (ChE) activity in two teleost fish, the White mouth croaker Micropogonias furnieri (Scianidae) and the Madamango sea catfish Cathorops ...

This paper analyzes the influence of infrared radiation (IR) on regeneration, after autotomy of limb buds of Neohelice granulata and consequently the time molt. Eyestalks were ablated to synchronize the start of molt. ...

Lipids seem to be the major energy store in crustaceans. Moreover, they are extremely important in maintaining structural and physiological integrity of cellular and sub cellular membranes. During salinity adaptation, ...

N-acetyl-5-methoxytryptamine or melatonin is a multifunctional molecule. The main physiological function, at least in vertebrates, is to transduce to the animal the photoperiodic information and regulate rhythmic parameters. ...

The purpose of this study was to verify the occurrence of pigment dispersion in retinal pigment cells exposed to UVA and UVB radiation, and to investigate the possible participation of a nitric oxide (NO) pathway. Retinal ...

The ability of UV radiation to stimulate color change in vertebrates is well known; howeve, the signaling pathway involved is not fully explained. Since nitric oxide (NO) is among the candidates for this role, in this study ...

Two neuropeptides, the pigment dispersing hormone (PDH) and the pigment concentrating hormone (PCH), are well known to respectively promote centrifugal and centripetal granule translocation in the freshwater shrimp ...

Copper is an essential metal to aquatic animals, but it can be toxic when in elevated concentrations in water. The objective of the present study was to analyze copper effects in zebrafish hepatocytes (ZFL cell-line). The ...

The first and main target-structure of ultraviolet (UV) radiation in animals is the body surface, including the skin and eyes. Here, we investigated cell damage in the visual system of the crab Neohelice granulata acclimated ...