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Topic: Nauplius (larva)

	Larval Forms - LoveToKnow 1911
		A larva similar to the trochosphere in some features, particularly in possessing a preoral ring of cilia and an apical plate, is found in the Polyzoa, and in adult Rotifera, which latter, in their ciliary ring and excretory organs, present some resemblance to the trochosphere, and are sometimes described as permanent adult trochospheres.
		The nauplius is found throughout the group and is the more important of the two; the zoaea is confined to the higher members, in some of which it merely forms a stage through which the larva, hatched as a nauplius, passes in its gradual development.
		The nauplius larva is of classic interest because its occurrence has enabled zoologists to determine with precision the position in the animal kingdom of a group, the Cirripedia, which was placed by the illustrious Cuvier among the Mollusca.
	www.1911encyclopedia.org /Larval_Forms (3472 words)

	Metamorphosis - LoveToKnow 1911
		The larva of a butterfly is a worm-like organism which creeps on and voraciously devours the foliage of certain plants (fig.
		In the may-flies and dragon-flies, in which the larva is aquatic, the change is prepared for some time before the actual metamorphosis, the organs which are necessary for the aerial existence being gradually acquired during larval life.
		In Phoronis the metamorphosis of the larva (Actinotrocha), which occurs on fixation, is gradually led up to, but the mode of destruction of some of the larval organs is peculiar; the brain and sense organs of the larva pass into the stomach and are digested.
	www.1911encyclopedia.org /Metamorphosis (3332 words)

	Aquascope\|Facts\|Nauplius larva (Site not responding. Last check: 2007-09-10)
		Nauplius larvae from different specie of crustacaens are quite similar, but nauplius larvae of the rankfotingarna are distinct.
		Nauplius larvae are most common during the summer and autumn and mainly live on the nutrition provided by the egg.
		Classification: Nauplius larvae are crustaceans that belong to the arthropods.
	www.vattenkikaren.gu.se /Fakta/arter/crustace/nauplarv/nauplae.html (168 words)

	Lander University \| Artemia
		The nauplius is the earliest hatching stage and the naupliar eye consists of three or four median ocelli.
		A nauplius is a crustacean larva that swims with head appendages, whereas a zoea is an older larva that swims with thoracic appendages.
		Larvae can be reared to maturity by this method and, in fact, continuous cultures can be maintained with the adults of the first generation producing eggs for subsequent generations.
	webs.lander.edu /rsfox/invertebrates/artemia.html (6791 words)

	Nikon MicroscopyU Movie Gallery: Nauplius (Crustacea)
		Nauplius Video No. 1 - A close-up of a translucent nauplius as it scampers across the microscope field; under darkfield illumination at a magnification of 200x with a playing time of 8.1 seconds.
		The nauplius is the most primitive crustacean larval type found in existing crustaceans.
		In terms of sheer numbers, the crustacean nauplius is considered by some to be the most abundant type of multi-cellular animal on earth and is an important food source for fish and predatory invertebrates.
	microscopyu.com /moviegallery/pondscum/crustacean/nauplius/index.html (199 words)

	Lander University \| Balanus
		The mantle is derived from the bivalved carapace of the cypris larva (Fig 19-79B).
		The nauplius larva is the characteristic crustacean larva (Fig 5, 19-79A).
		The barnacle nauplius is easily distinguished from other crustacean nauplii by a pair of secretory frontal horns on the anterolateral corners of the head.
	webs.lander.edu /rsfox/invertebrates/balanus.html (4863 words)

	Biol. Bull. -- Stuart et al. 202 (1): 53 Figure 2
		H-histamine into the ocellus of nauplius larvae as revealed by autoradiography.
		Accumulation of silver grains over the ocellus cannot be distinguished from pigment in brightfield illumination but is obvious in epipolarized light, which reflects from the silver grains but not from the pigment.
		The insert shows a section through another eye at a different orientation in which the pigment arms form two back-to-back cups around the photoreceptors; the right arm of the upper cup is incomplete.
	www.biolbull.org /cgi/content-nw/full/202/1/53/F2 (167 words)

	arthrop (Site not responding. Last check: 2007-09-10)
		The simplest larva stage is the nauplius larva, with three pairs of appendages..
		There are 6 nauplius stages increasing size which swim and filter phytoplankton over a period of a month or so before giving rise to a non-feeding larva--the cypris larva.
		Now they are divided morphologically into two sub-orders..shrimplike with many branched gills and planktonic eggs hatching as nauplius larva (Dendrobranchiata) and Pleocyemata which have gills lacking secondary branches and eggs carried on pleopods before hatching as zoeae.
	darter.ocps.net /classroom/klenk/Crust.htm (1775 words)

	Crustacea Info
		The nauplius larva hatches out of an egg, and initially consists of not much more than a single median eye, the first three head somites with their appendages, and a terminal somite (telson).
		Barnacles are recognized by most shoregoers as the crust covering pilings and boat bottoms, yet it was not until the invention of the microscope that scientists could see the nauplius larva and confirm that barnacles were related to copepods and crabs, rather than to the mollusks they resemble.
		Comb-like legs (cirri) are kicked through the water as each wave passes, tiny planktonic organisms that are strained by this basket of legs are pulled by the into the shell to be eaten (example).
	www.nhm.org /guana/bvi-invt/bvi-surv/crus-inf.htm (1164 words)

	Uptake of the Neurotransmitter Histamine into the Eyes of Larvae of the Barnacle (Balanus amphitrite) -- Stuart et al. ...
		Aliquots of larvae were incubated with increasing concentrations of drug, as described in Materials and Methods.
		Although the behaviors of the nauplius larva and the adult barnacle
		Thorson, G. Light as an ecological factor in the dispersal and settlement of larvae of marine bottom invertebrates.
	www.biolbull.org /cgi/content/full/202/1/53?ck=nck (3397 words)

	[No title]
		All crustaceans have bilaterally symmetrical bodies covered with a chitinous exoskeleton, which may be thick and calcareous (as in the crayfish) or delicate and transparent (as in water fleas).
		Since it does not grow, the exoskeleton must be periodically molted when the animal undergoes metamorphosis (typically from free-swimming larva to adult) or simply outgrows its shell.
		The free-swimming larva characteristic of crustaceans, called a nauplius larva, has an unsegmented body, a median eye, and three pairs of appendages.
	www.lycos.com /info/exoskeleton--chitin.html (377 words)

	Nauplius Larva (Site not responding. Last check: 2007-09-10)
		The Nauplius is the microscopic larva stage of many species of crustacean.
		The single compound eye in the center of the head enable the Nauplius larva to swim to areas where algae is likely to be abundant.
		The nauplius shown at the left was caught in October 1997 at
	pleasanton.k12.ca.us /avhsweb/thiel/creek/field/arthro/nauplius.html (95 words)

	BM Gallery - Larvae of marine invertebrates
		This larva developed from a yolky egg after it was fertilized.
		The larva shown here is one of severral larval stages in the life-history of a very familiar marine animal.
		Yet the animal that results when this larva metamorphoses into its adult form will have no backbone (it is an invertebrate), and it will have a primitive form of feeding with a filtratioin basket.
	www.ebiomedia.com /gall/larvae/larva1.html (478 words)

	Wonders of the Sea: Crustaceans
		The interesting aspect of the Cypris larva is that it is non-feeding and a weak swimmer.
		The larva soon settles to the bottom and pulls itself with its antennae in search for a suitable home: rocks, dock pilings, boats, mussels, or even whales.
		At this stage the hermit crab is known as a zoea larva, which grows by molting.
	www.oceaninn.com /guides/crustacea.htm (1527 words)

	Barnacles
		After the Nauplius stage has lived some time swimming in the coastal plankton it undergoes a surprising transformation.
		The next stage is called the Cypris larva because it resembles a member of another group of crustaceans, Cypris, an Ostracod, (tiny bivalved crustacean).
		The remarkable aspect of the Cypris larva is that it does not eat.
	www.microscopy-uk.org.uk /mag/artjan99/barnac.html (571 words)

	The Scaling and Structure of Aquatic Animal Wakes -- Videler et al. 42 (5): 988 -- Integrative and Comparative Biology
		nauplius stage and the smallest copepodid stage are compared.
		of a nauplius larva N6 and a copepodid C1.
		Reynolds, O. An experimental investigation of the circumstances which determine whether the motion of water shall be direct or sinuous, and of the law of resistance in parallel channels.
	icb.oxfordjournals.org /cgi/content/full/42/5/988 (4032 words)

	REEF CRUSTACEA
		This is a non-feeding stage characterized by a simple median eye in the head, sometimes called a nauplius eye, plus three sets of appendages.
		The fertilized egg develops into a free-swimming larva, called a nauplius larva (see appended reference), of the basic crustacean type, with paired antennae.
		This form then molts to become a cypris larva, which eventually attaches itself to a suitable substrate by its first pair of antennae and undergoes metamorphosis into an adult.
	www.fiu.edu /~goldberg/coralreefs/CRUSTACEA.htm (3572 words)

	Insect Social Systems (Site not responding. Last check: 2007-09-10)
		Not only are all workers female, but in most colonies they are all sisters, and the larvae they care for are also their sisters.
		A free-living nauplius larva is typical of several diverse groups of crustaceans, including the copepods, branchiopods, euphausiids, and cirripeds.
		The cypris larva, or cyprid, is housed ina bivalved, noncalcified carapace.
	bama.ua.edu /~clydeard/bsc376/lecture32.htm (1808 words)

	Fresh Water Copepod Crustaceans: Introduction with photomicrographs of copepods (Cyclops, etc.). (Site not responding. Last check: 2007-09-10)
		This mature female Cyclops is seen from the side, and one of the eggs of the egg-sac has just hatched into the nauplius larva seen on the right.
		A high-power picture of a Cyclops nauplius larva similar to the newly-hatched nauplius in the picture above, showing the fat globules which are the energy reserves of the larva until it begins to take in its own food.
		This nauplius larva is probably also of Cyclops.
	www.micrographia.com /specbiol/crustac/copepo/cope0100.htm (548 words)

	Biology Of Arthropods Guide
		These transparent larva occupy the niche of manure feeder, living in puddles rich in organic waste material.
		A twist on the chew and swallow approach is shown by insects with beaks or hollow fangs.
		Remove the eggs from a gravid female and rear the larva in a petri dish so that they can be observed using a stereo dissection microscope.
	ebiomedia.com /prod/BOarthropods.html (1724 words)

	Fathom :: The Source for Online Learning
		They hatch into a larva called a nauplius larva, which first measures about a tenth of a millimetre long.
		The barnacle develops through six nauplius stages and eventually approaches a millimetre in length before moulting to become a cypris larva.
		At cypris stage, the young barnacle is unable to feed, so the nauplius feeding stage is crucial for building up energy stores to survive settlement and metamorphosis, the next stages of development.
	www.fathom.com /feature/121900 (2176 words)

	Brine Shrimp and Ecology of Great Salt Lake
		Depending on the water temperature, the larvae remain in this stage for about 12 hours, subsisting on yolk reserves before molting to the second nauplius stage, which feeds on small algal cells and detritus using hair-like structures on the antennae known as setae.
		Although the cysts are very small (about 200 micrometers in diameter; 50 could fit on the head of a pin) at times they become so numerous that they form large red-brown streaks on the surface of the lake.
		Under optimum conditions of food supply and lack of stress from increasing salinity or decreasing dissolved oxygen, fertilized female shrimp may produce eggs that hatch soon after emerging from the ovisac to produce nauplius larvae, which is known as ovoviparous reproduction.
	ut.water.usgs.gov /shrimp (973 words)

	4.2. Use of cysts
		A major problem in the early rearing of marine fish and shrimp is the susceptibility of the larvae to microbial infections.
		For example, for the culture of carp larvae during the first two weeks, the use of decapsulated cysts constitutes a saving of over one third in the amount of Artemia cysts used, compared to the use of live nauplii.
		This may have dietary consequences when decapsulated cysts are used, since marine fish larvae use their large pool of free amino acids as an energy substrate during the first days after hatching.
	www.fao.org /docrep/003/W3732E/w3732e0n.htm (6098 words)

	Section B - Barnacles
		To have a free swimming,feeding nauplius larva, followed by a two-shell, non-feeding cyprid stage.This stage settles and attaches to a solid object
		While in the plankton barnacle larvae (nauplii and cyprid stages) are eaten by other members of the plankton, and can even be filtered out and eaten by adult barnacles.
		Most barnacles release young in the form of many nauplii larvae after about 4 months, often coinciding with periods when food in the plankton is plentiful.
	www.reef.edu.au /asp_pages/secb.asp?FormNo=40 (1185 words)

	Glossary N (Site not responding. Last check: 2007-09-10)
		Natural selection: The process whereby some organisms in a species have certain inherited variations that give them an advantage over others.
		Nauplius: The first planktonic larval stage of barnacles and some other crustaceans.
		The nauplius larva metamorphoses into the cypris larva.
	www.dolphinpetreefclub.com /n.html (183 words)

	Reproduction (Site not responding. Last check: 2007-09-10)
		This larva is a rounded, unsegmented being with only both sets of antennae and the mandibles present.
		This stage can appear while still in the egg or the larva can be hatched this way, depending on the species.
		After the nauplius stage, some crustaceans metamorphosize into a mini-adult form and others continue to go through many stages before reaching the adult form.
	www.personal.psu.edu /students/e/i/eim104/reproduction.htm (153 words)

	Nauplius - Wikipedia, the free encyclopedia
		Nauplius (mythology), the son of Poseidon and Amymone in Greek mythology
		King of Euboea or (more usually) Nauplia, and a descendant of Nauplius
		Nauplius (plant), a genus in the sunflower family (Asteraceae).
	en.wikipedia.org /wiki/Nauplius (103 words)

	EED/GEO 5601: Zooplankton slides (Site not responding. Last check: 2007-09-10)
		A copepodid larva of a copepod shown with a nauplius for comparison.
		A nauplius becomes a copepodid after the sixth molt, an individual molts five more times as a copepodid before it becomes a sexually mature adult.
		The larvae of Chaoborys are aslo called phantom midges or glass worms because they are nearly transparent.
	lrc.geo.umn.edu /courses/5601/zoo.html (165 words)

	The wonderful world of microrganisms (Site not responding. Last check: 2007-09-10)
		The parasitic forms always have modified and specialized appendages used to attach to the fish, and specially modified mouth parts used to pierce and suck.
		In the email, I mixed it up, there are 6 larval stages [nauplius = larva, naupliar = larval] and 5 adult stages in this particular specimen (sub class harpacticoida).
		There is a molt between all the life stages and the following photo shows an empty exoskeleton.
	www.pavementgear.com /microsite/micro6.htm (516 words)

	Wild Life - Home on the Rock
		I will tell you my earliest memory: it is from my days as a nauplius larva, drifting in an endless expanse of blue water or sky, for all I knew at the time just off a landmass I later came to know as Unalaska Island.
		The sun is quite dangerous for a barnacle, and it may well be that I placed myself a little too high in the upper tidal zone, because some days in summer, during the low spring tides, I almost desiccate before I am wetted again.
		The point is just this: with a twice-daily submersion, and thus an excess of food and no serious risk of desiccation, lower barnacles never know what it is to appreciate the common stuff of life.
	www.baldwinpage.com /wildlife/sea/20060104.html (2753 words)

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