نتایج جستجو برای: bacillariophyceae
تعداد نتایج: 586 فیلتر نتایج به سال:
هدف از این تحقیق، تعیین محتویات روده ماهی کپور نقره ای در طول 7 ماه دوره پرورش و قابلیت هضم جنس های مختلف فیتوپلانکتونی در روده ماهی کپور نقره ای و تعیین ارتباط بین ترکیب پلانکتونی استخرهای پرورش ماهی گرم آبی و محتویات روده ماهی کپور نقره ای بوده است. در این تحقیق از دو استخر پرورش ماهیان گرمابی به مساحت 10 هکتار استفاده شد. جهت بررسی محتویات روده، در نیمه هر ماه 10 عدد ماهی از هر استخر به طور ...
Physico-chemical variables in the marine environment are subjected to wide spatio-temporal variations. The various physico-chemical parameters viz: temperature, salinity, pH, dissolved oxygen and nutrients of the environment are the factors which mainly influence the production and successful propagation of planktonic life in the coastal biotopes. The ranges of values of surface water temperatu...
Limnological studies were under taken to understand the correlation between physicochemical parameters and phytoplanktons of the Tighra reservoir, Gwalior, Madhya Pradesh from November 2010 to October 2011.In the present investigation, water temperature ranged from 18.4 C to 35.75 C, transparency ranged from 152.75 cm to 211.5 cm, conductivity from 272.5 μS/cm to 408.5 μS/cm, turbidity from 5.7...
Phytoplankton constitutes the primary producers of aquatic ecosystems and represents the food chain base that supports the commercial fisheries of most water bodies. Nowadays, there is lack of information on phytoplankton assemblages of most reservoirs in Africa. To contribute with this knowledge, this study was carried out to determine the density and diversity of seasonal variations of phytop...
Periphyton was cultured and its phytoplankton communities were identified based on morphological features. This included 24 genera belonging to the 6 classes. Highest number of genera was found in Bacillariophyceae followed by Cyanophyceae and Chlorophyceae. Whereas a single genus was documented from class Euglenophyceae, Ulvophyceae and Xanthophyceae. Hence, the study is quite handy for the id...
Plankton is a fundamental part of the waters, especially in coral reef ecosystems. This study aims to determine abundance and diversity plankton species, both phytoplankton, zooplankton waters Gosong Island, Southwest Aceh. research was conducted May 2021. Samples were collected from 4 sampling points with replications. Phytoplankton consists 51 species which are 3 families, namely Cyanophyceae...
Integrated Multi-throphic Aquaculture (IMTA) is a system in cultivation that prioritizes balance its maintenance. The IMTA method utilizes feed residues can be utilized by organism from the remaining biota at higher levels of trophic with lower levels. This study aims to analyze biological parameters different densities seaweed and green mussels best stocking for growth survival tiger shrimp. t...
Pinnularia is an ecologically important and species-rich genus of freshwater diatoms (Bacillariophyceae) showing considerable variation in frustule morphology. Interspecific evolutionary relationships were inferred for 36 Pinnularia taxa using a five-locus dataset. A range of fossil taxa, including newly discovered Middle Eocene forms of Pinnularia, was used to calibrate a relaxed molecular clo...
The aim of this work was to be informed and aware of the red tide conditions before the entering of algal blooms in seawater supply canals of the shrimp farm and hatchery complexes in Bushehr Province. Field investigations and monthly samplings have been carried out to determine environmental parameters, nutrients, chlorophyll–a and phytoplankton in the southern part of the input water ch...
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