How big are green algae in water?

Answer 1

Not long if they land on me, horrid tickly things.

This is a tricky one to ask as there are around 4,400 different types of greenfly and, as one might expect, there is some degree of variation in the lifespan of different types. It's also worth remembering that a greenfly is only one stage of the insect we call an aphid's life - it spends time as a nymph (pre-adult) and as an egg (in most cases - unusually for an insect, some species can produce live young).

The common greenfly we see in the UK is called Brevicoryne brassicae, the cabbage aphid. Nymphs hatch from eggs after about a week to 12 days. The time the individual then takes to develop into the adult greenfly then probably depends more on environmental factors than time - ie, availability of food, temperature etc. However, once it does, a female will be able to produce young for around a month at a rate of five or six per day, after which she will die. I've been unable to find any similar data for male aphids - but "about six weeks" seems a reasonable answer to your question.

Here's some interesting greenfly facts: Greenfly can reproduce asexually - that is, a female does not need a male in order to produce young. They've been around for about 280 million years, far longer than humans have. Ants farm aphids in much the same way that we farm cows - the ants collect a sticky substance known as honeydew which made by the aphids and in return protect them from predators. Greenfly often travel vast distances on wind currents - individuals marked in the UK have been found as far away as Russia.

Answer 2

algae by copepods involves remote detection of individual particles and subsequent active capture responses In this study we use radiotracer experiments to quantify the clearance rates of five coexisting freshwater copepods and to investigate the relative merits of the chemoreception andmechanoreception hypotheses of remote detection Tropocyclopsand three diaptomid copepods exhibited relatively high clearance rates when feeding on low concentrations of large algae, suggesting that most previous studies with freshwater copepods have underestimated maximal clearance rates and the degree of size selectivity. All five species of copepods exihibited strong selection for an intermediate-sized flagellate (25 µm Cartena) or a large-sized nonmotile alga (80 µ.m Pediastrum) over a small-sized flagellate (6 µ.m Chlamydomonas). The weight-specific clearance rate for Tropocylops prasmus feeding on motile Cartena (271 ml mg-1 h-1) was about twice that of three diaptomid copepods and more than an order-of-magnitude higher than the estimate for Epischura lacustris feeding on its preferred alga, Pediastrum Assuming that distance chemoreception ('smell') is important in remote detection, we predicted that the addition of high concentrations of 'algal odors' would obscure any chemical gradients emanating from individual algal cells and would thereby hinder the remote detection and active capture of large algae Contrary to this hypothesis, the addition of amino acids, sucrose, and algal extracts had no effect on the clearance rates and selectivity of Diaptomus birgei. These results, together with recent cinematographic studies (Vanderploeg etal., 1990), suggest that mechanoreception is the primary mechanism for the remote detection of large particles by diaptomid copepods. A raptorial cyclopoid, Tropocyclops prasinus, exhibited strong preferences for motile algae, whereas a suspension-feeding calanoid, D birgei, did not select between motile and nonmotile cells. Motility appears to be an important factor in algal detection for small cyclopoid copepods but not for suspension-feeding diaptomids

Answer 3

Algae can be as small as a single cell (Eukaryotic, so bigger than bacteria), or as big as a big long strand of kelp which can be many meters long (like Macrocystis, a genus of kelp called giant kelp that makes up the kelp forests in coastal California waters).

Answer 4

Green Algae looks like a hair but its very soft.In Philippine language it is called

"Lumot" (for Bisayan)..Its very cute!

If you want to know what its look see the image of it and describe it...

Answer 5

Depending on what kind of Green Algae it is, it can grow up to 30cm in length.

Answer 6

the green algae live for 3 days.

Answer 7

as big as my shlang

Answer 8

Same size as of water.

Answer 9

realy big