ULTIMO AGGIORNAMENTO BANCA DATI: 13/09/2024 13:00:57
Closely related species that show clear phenotypic divergence, but without obvious geographic barriers, can provide opportunities to study how diversification can occur when opportunities for allopatric speciation are limited. We examined genetic divergence in the coral reef fish genus Hypoplectrus ...
Males often play a critical role in offspring care but the time and energy invested in looking after young can potentially limit their ability to seek out additional mating opportunities. Recent studies, however, suggest that a conflict between male parental effort and mating effort may not always be ...
It has long been known that intraspecific variation impacts evolutionary processes, but only recently have its potential ecological effects received much attention. Theoretical models predict that genetic or phenotypic variance within species can alter interspecific interactions, and experiments have ...
Omega-3 (ω3) polyunsaturated fatty acids (PUFA) are major components of brain cells membranes. ω3 PUFA-deficient rodents exhibit severe cognitive impairments (learning, memory) that have been linked to alteration of brain glucose utilization or to changes in neurotransmission processes. ω3 PUFA supplementation ...
The relationship between toxic marine microalgae species and climate change has become a high profile and well discussed topic in recent years, with research focusing on the possible future impacts of changing hydrological conditions on Harmful Algal Bloom (HAB) species around the world. However, there ...
Background Many species of the brine shrimp Artemia are found in various severe environments in many parts of the world where extreme salinity, high UV radiation levels, high pH, anoxia, large temperature fluctuations, and intermittent dry conditions are often recorded. To withstand adverse environments, ...
Summary The lateral line system of fish consists of superficial neuromasts, and neuromasts embedded in lateral line canals. Lateral line neuromasts allow fish to sense both minute water motions and pressure gradients, thereby enabling them to detect predators and prey or to recognize and discriminate ...
The Asian cyprinid fish, the topmouth gudgeon (Pseudorasbora parva), was introduced into Europe in the 1960s. A highly invasive freshwater fish, it is currently found in at least 32 countries outside its native range. Here we analyse a 700 base pair fragment of the mitochondrial cytochrome b gene to ...
Background Transposable elements (TEs) are a rapidly evolving fraction of the eukaryotic genomes and the main contributors to genome plasticity and divergence. Recently, occupation of the A- and D-genomes of allopolyploid wheat by specific TE families was demonstrated. Here, we investigated the impact ...
Background Paragonimiasis is a neglected tropical disease caused by an infection with lung flukes that is transmitted through the consumption of undercooked crabs. The disease is often confused with tuberculosis. Paragonimiasis is thought to be endemic in south-western Côte d'Ivoire. Methods Two ...
Background Adult neurogenesis, the production and integration of new neurons into circuits in the brains of adult animals, is a common feature of a variety of organisms, ranging from insects and crustaceans to birds and mammals. In the mammalian brain the 1st-generation neuronal precursors, the astrocytic ...
Formaldehyde is a well-studied chemical and effects from inhalation exposures have been extensively characterized in numerous controlled studies with human volunteers, including asthmatics and other sensitive individuals, which provide a rich database on exposure concentrations that can reliably produce ...
This paper discusses the disease-free and endemic equilibrium points of a SVEIRS propagation disease model which may potentially involve the injection of a regular constant vaccination.
Methodologies usually adopted in urban and regional planning do not assume an approach based on Spatial Data Infrastructures principles, which could ensure a better use of geospatial data and support interoperability of planning choices providing an active participation of stakeholders involved in planning ...
With the global climate change and impact of human activities on water resources, ecological security problems of water have attracted increasing attention. Based on investigation and study of ecological security situation of water resources in Shandong province, many problems are found out. For example, ...
Water quality of Gan river from 2000 to 2006 is evaluated by principal component analysis, the results show that in the past 7 years, on the whole, the water quality of Gan river is getting better, but the water quality of Gan river in middle and lower reaches is still poorer. Water quality improvement ...
By analysis of back propagation (BP) neutral network model structure and Tianjin Binhai new area non-point source COD pollution load (1997–2008), the paper established the BP neutral network of input layer neuron number 7, hidden layer neuron number 19, and output layer neuron number 1 to simulate COD ...
This paper studies the preparation technology of microencapsulation using cactus pectin and phospholipids. The result showed that the wall materials and their optimum composition was pectin/maltodextrin is 1∶2(mol/mol). the concentration of emulsion is 25%(wt/wt). The suitable proportion of core material ...
The surrounding area of the Bohai Bay has one of the highest economic development rates of China. Rapid industrialization and urbanization has resulted in extensive changes in land use, including the construction of harbors and embankments. For the analysis of the changes of the coastlines, multi-temporal ...
Among a series of dose of Yeast immunity polysaccharide (YSP, 0.2%,0.5% and 1%), the time of the experiment was 21d and the index of immunity was measured at different stages. The result showed that YSP had positive effect on the immunity of Apostichopus japonicus at normal states, which it could hold ...