The proportion of mimics and models is a key parameter in mimetic systems. In monoecious plants with self-mimicry pollination systems, the mimic-model ratio is determined by the floral sex ratio. While an equal sex ratio (1:1) could provide the perfect balance between pollen donors and stigma surfaces able to receive the pollen, an unequal ratio could increase pollination by production of a gre...

The relative homogeneity of pelagic environments has been regarded as the reason for the absence of hybrid zones for hybridizing planktonic Daphnia (Crustacea: Cladocera); occasional dominance of interspecific hybrids over parental species was explained by their temporal superiority in fluctuating environments. However, water bodies with spatially varying environmental conditions might facilita...

background: marine pollution is a global environmental problem that its monitoring by ideal biomonitors is of great importance. marine organisms, especially mussels, have the ability to accumulate metals from the environment they can be considered as a biomonitoring agent. methods: in this study, concentrations of heavy metals were measured in saccostrea cucullata collected from seven sites on ...

S u m m a ry : Previous studies have demonstrated that lichens can accumulate high amounts of radioactivity. Because of their long life expectancy they are suitable and inexpensive biological detectors of the nuclear fallout. In this study, liehen samples were collected from diffe­ rent locations in Austria over a period of more than 15 years. Samples were taken before, immediately after and a ...

Survey of heavy metal content in oysters (C. cucullata) the waters Los Kala River estuary June-July 2018. Heavy analysis was carried out at Riau KLHK Laboratory with Atomic Abortion Spectrophotometer Shimadzu AA-7000. The results showed that Pb (14,454 µg/g), Cu (103,778 (111,611 µg/g). highest found Station II (16.0388 i V (170.2445 and Zn (128.7621 In general calculations Provisional Tolerabl...

This study is an attempt to evaluate the biomonitoring capabilities of rock oyster, Saccostrea cucullata, for mercury (Hg) pollution. The oyster and sediment samples were collected from 10 rocky habitats of Qeshm and Hormoz Islands in the Persian Gulf. The concentration of mercury in the shell and soft tissues of the oysters and sediments were analyzed using an advanced mercury analyzer. Biot...