Stoichiometric and growth responses of a freshwater filamentous green alga to varying nutrient supplies: slow and steady wins the race

2014 ◽  
Vol 59 (11) ◽  
pp. 2225-2234 ◽  
Author(s):  
Colleen M. Middleton ◽  
Paul C. Frost
Keyword(s):  
Green Alga ◽  
Growth Responses ◽  
Filamentous Green Alga

Acentropus niveus (Oliv.) (Lepidoptera: Pyralidae) on the north shore of Lake Erie with a consideration of its distribution in North America

1950 ◽  
Vol 82 (12) ◽  
pp. 250-252 ◽  
Author(s):  
W. W. Judd
Keyword(s):  
North America ◽  
Green Alga ◽  
Lake Erie ◽  
Filamentous Green Alga ◽  
North Shore ◽  
The North ◽  
Lepidoptera Pyralidae ◽  
Shallow Bay ◽  
The Village ◽  
The Waves

On July 12, 1950 a collection of adults of the moth Acentropus niveus (Oliv.) was made on the north shore of Lake Erie near the village of South Cayuga, Ontario (Maps A, B-3). At the southern limits of the townships of Dunn and South Cayuga (Haldimand County) a shallow bay extends for a distance of about two miles along the shore of the lake (Map A). Along this bay is a sandy or gravelly beach ten to twenty yards wide backed by a cliff of clay that rises abruptly above the beach. On the day the collections were made the sky was clear and a brisk southerly breeze was causing waves to wash on the beach. The action of the waves had deposited debris, consisting largely of tangled masses of a filamentous green alga and exuviae of the mayfly Hexagenia occulta, in a windrow six inches to two feet wide along the shore. The moths ere found in this debris, most of them lying dead and with bedraggled wings, while some lay on their backs with wings stuck to the damp surface and with legs kicking and a few were crawling about on the debris.

scholarly journals New data on distribution, morphology and ecology of Oedogonium capillare Kützing ex Hirn (Oedogoniales, Chlorophyta) in Poland

2015 ◽  
Vol 40 (1) ◽  
pp. 21-26
Author(s):  
Pikosz Marta ◽  
Messyasz Beata
Keyword(s):  
Green Alga ◽  
High Variability ◽  
Taxonomic Identification ◽  
Vegetative Cells ◽  
Filamentous Green Alga ◽  
Alga Species ◽  
Wide Ph Range ◽  
Ph Range ◽  
Comprehensive Study

Abstract Algological investigations were focused on taxonomy, chorology and ecology of threatened filamentous green alga species in Poland. Studies on Oedogonium capillare Kützing ex Hirn growing in large quantities in association with Cladophora rivularis (Linnaeus) Hoek in pond were conducted. The aim of these studies was to describe the distribution, ecology and morphology of O. capillare as part of a more comprehensive study of this filamentous green alga. It is the eighth record in Poland for O. capillare. Filaments of O. capillare were grown over a wide pH range (7.3-9.6) and in high variability of nutrients. Vegetative cells, oogonia and antheridia were observed, which allowed taxonomic identification. O. capillare occurs in eutrophic waters which requires protection of its habitat.

scholarly journals A LARGE SCALE QUASI-CRYSTALLINE LAMELLAR LATTICE IN CHLOROPLASTS OF THE GREEN ALGA ZYGNEMA

1970 ◽  
Vol 45 (3) ◽  
pp. 522-531 ◽  
Author(s):  
Robert J. Mclean ◽  
George F. Pessoney
Keyword(s):  
Internal Structure ◽  
Green Alga ◽  
Thylakoid Membrane ◽  
Large Scale ◽  
Three Dimensional ◽  
Prolamellar Body ◽  
Dimensional Lattice ◽  
Filamentous Green Alga ◽  
Prolamellar Bodies ◽  
Single Membrane

A quasi-crystalline lamellar lattice was observed in chloroplasts of the filamentous green alga Zygnema. The lattice does not appear in the cells until cultures are at the end of the log phase of growth. Pseudograna are also present and become more numerous towards the middle of the log phase. The three-dimensional lattice superficially resembles the configuration of cubic prolamellar bodies but is about 10 times larger and is entirely different in internal structure. The lattice is composed of one or two appressed thylakoids in a stroma matrix which is bounded on each side by a single thylakoid membrane. This multilayered sandwich of membranes and matrix occupies a position equivalent to the single membrane of a cubic prolamellar body.

scholarly journals Use of a filamentous green alga (Chaetomorpha sp.) and microsnail (Stenothyra sp.) as feed at an early stage of intensive aquaculture promotes growth performance, artificial feed efficiency, and profitability of giant tiger prawn (Penaeus monodon)

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0244607
Author(s):  
Isao Tsutsui ◽  
Dusit Aue-umneoy ◽  
Piyarat Pinphoo ◽  
Worachet Thuamsuwan ◽  
Kittipong Janeauksorn ◽  
...  
Keyword(s):  
Green Alga ◽  
Feed Efficiency ◽  
Penaeus Monodon ◽  
Feed Consumption ◽  
Control Group ◽  
Benthic Organisms ◽  
Shrimp Culture ◽  
Filamentous Green Alga ◽  
Tiger Prawn ◽  
Intensive Aquaculture

With the worldwide demand for tropical penaeid prawn increasing in recent decades, more research on shrimp culture methods is needed to enhance efficiency and profitability for shrimp farmers. The objective of this study was to develop a technique to boost the productivity, feed efficiency, and profitability of the giant tiger prawn (Penaeus monodon). To accomplish this, a novel culture setup was established in which two benthic organisms, a filamentous green alga (Chaetomorpha sp.) and a microsnail (Stenothyra sp.), were propagated together with P. monodon post-larvae during an early culture stage and then offered to shrimp as supplementary live feeds in intensive aquaculture ponds. For the experiment, shrimp post-larvae (density: approximately 33 individuals m-2) were cultured in outdoor concrete ponds (9 × 9 × 1.2 m) under either control (fed only artificial feed, n = 3) or experimental (fed artificial feed and benthic organisms, n = 3) conditions until they reached marketable size (15 weeks). Apparent green algae consumption was 6.81 kg (8.4% green alga to total feed consumption), whereas microsnail consumption was 1.96 kg (2.4% microsnail to total feed consumption). Compared with the control group of giant tiger prawn, the experimental group showed significantly higher productivity (total number of shrimp produced: 118%; total shrimp production: 133%), feed efficiency (feed conversion ratio of artificial shrimp feed: 89%), and profitability (shrimp sales: 139%; balance between shrimp sales and costs: 146%), while labor and financial costs were kept minimal. These results can be explained by the enhanced growth of shrimp at the early stages of culture. The techniques developed in this study will help to advance the efficiency of intensive aquaculture operations for giant tiger prawn and also improve profitability for shrimp farmers.

scholarly journals Effects ofp-cresol on photosynthetic and respiration rates of a filamentous green alga (Spirogyra)

1983 ◽  
Vol 30 (1) ◽  
pp. 1-5 ◽  
Author(s):  
Jean Stout ◽  
Susan S. Kilham
Keyword(s):  
Green Alga ◽  
Filamentous Green Alga ◽  
Respiration Rates

Nutritional Control on Sex Differentiation in the Filamentous Green Alga Oedogonium hatei Kam.

1988 ◽  
Vol 136 (4) ◽  
pp. 389-392 ◽  
Author(s):  
B.R. Chaudhary ◽  
H.V. Singh
Keyword(s):  
Green Alga ◽  
Sex Differentiation ◽  
Filamentous Green Alga
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