نتایج جستجو برای: relative abundance
تعداد نتایج: 455988 فیلتر نتایج به سال:
statistical studies on palynology contents of late cretaceous to paleocene age gurpi formation in a surface section in zagros basin,sw iran indicate changes in abundance, species diversity, ratio of spiniferites to cyclonephelium (s/c), palynological marine index(pmi) values and organic facies. these palynological variations clearly reflect fluctuations in relative sea-level and depositionalenv...
The aim of the present study was to examine the effect of temporal variations and tidal phases on frequency of Upeneus doriae (Günther,1869) in the coast of Bandar Abbas. Sampling was performed in September 2016 to April 2017. During the lunar calendar months, the highest abundance of U. doriae was observed in Muharram (with147/15 ± 144/37 n.G-1.day-1 ), and lowest was in Rabi Ul Awal (with 3/...
The Hojdek Formation in the Kale-shur area consists of alternation of fine quartz arenitic-arkosic sandstones with dark gray to green shales and coal seams. This formation includes relatively well-preserved plant macrofossils which are studied here for the first time. 15 species of 9 genera belong to different orders such as Equisetales, Filicales, Sycadales and Pinales have been determined in ...
The survey of fish larvae assemblage variation was done in 2013 seasonally at the coastal areas of Southeastern side of Chabahar Bay. Sampling was done in 3 stations at day and night periods by a Bongo-Net with 300μ of mesh size. 29 families were identified. Clupeidae, Gobiidae and Blenniidae were dominant with more than 50% relative abundance. The PCA result was shown there were two separated ...
a field survey was conducted in wukari, taraba state to assess the diversity and abundance of insect species in selected habitats (residential, open field made up of grassland and an agroecosystem). sampling were done biweekly using light, pitfall and yellow pan traps set in 3 replicates, 30 m apart. insects recovered were wet preserved in 70% ethanol except butterflies and moths. representativ...
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