Results 261 to 270 of about 299,505 (285)
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Larval and Early Post-Larval Development of Arctica Islandica
Journal of the Marine Biological Association of the United Kingdom, 1982Mature eggs were stripped from ripe adult specimens of Arctica islandica and exposed to a dilute solution of ammonium hydroxide for various lengths of time before addition of stripped sperm. Larval and early post-larval stages were cultured under experimental laboratory conditions using standard bivalve rearing techniques.
R. A. Lutz +3 more
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Larval development of hyolithids
Lethaia, 1978The larval development of hyolithids is inferred to have been closely similar to that of primitive gastropods. A trochophore-like larva produced a swollen initial conch and a convex operculum. The initial conch was either subsphaerical and smooth or fusiform with a pointed apex and growth lines.
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Larval Development of Limnoperna Fortunei
2015Mature sperm cells of Limnoperna fortunei measure about 4 µm, and ova are typically spherical, 80–100 µm in diameter. Forty minutes after spawning, the first polar lobe appears, and the first division occurs 14 min later. Slightly over an hour after spawning, the second polar lobe appears and the second division yields a 4-cell stage.
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Food selection in larval fruit flies: dynamics and effects on larval development
Naturwissenschaften, 2013Selecting food items and attaining a nutritionally balanced diet is an important challenge for all animals including humans. We aimed to establish fruit fly larvae (Drosophila melanogaster) as a simple yet powerful model system for examining the mechanisms of specific hunger and diet selection.
Sebastian, Schwarz +2 more
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Larvae and Larval Development of Monogeneans
1963Publisher Summary This chapter focusses on a group of parasitic platyhelminths generally referred to as monogenetic trematodes. A few monogeneans are viviparous and the newly-born young resemble the parents, but most are oviparous, and the newly hatched young is a larva and called an oncomiracidium.
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Gill Development of Larval Walleyes
Transactions of the American Fisheries Society, 1999Abstract We describe the development of gill filaments and secondary lamellae of larval walleyes Stizostedion vitreum from hatching to 21 d posthatch. The number of gill filaments was counted on the second gill arch of 20 fish at 7, 14, and 21 d posthatch and on the gill arch of 5 fish on all other days.
Todd A. Phillips, Robert C. Summerfelt
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Larval development of Gobius xanthocephalus with genetic validation of larval identification
Journal of Fish Biology, 2008Larval development of Gobius xanthocephalus with descriptions of the ontogeny of the main structures, changes in pigmentation patterns and allometric relationships are presented for the first time. No previous descriptions of G. xanthocephalus larvae are available and therefore field collected larvae were compared with larvae obtained under controlled ...
Monteiro, J. +5 more
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Larval development of Toxocara canis in dogs
Veterinary Parasitology, 2011The parasitic roundworm Toxocara canis is present in dog populations all over the world. Due to its zoonotic potential, this roundworm is of special interest not only for veterinarians, but also for medical practitioners. In the present review, current knowledge of infection routes and the subsequent development of larvae within the canine host is ...
Thomas, Schnieder +2 more
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Larval Development of Glaridacris confusa (Cestoda: Caryophyllaeidae)
The Journal of Parasitology, 1967Larval development of the caryophyllaeid cestode Glaridacris confusa occurs in aquatic annelids of the families Tubificidae and Naididae. Procercoids possess a cercomer; the scolex and gonads are well developed. North American caryophyllaeid cestodes parasitize catostomid and cyprinid fishes; oligochaete annelids serve as their intermediate hosts ...
R L, Calentine, D D, Williams
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Gamete, Embryo, Larval Development
1984This chapter presents descriptions of the origin, structure, and differentiation of gametes, larval development, and larval metamorphosis. Recent reviews of sponge reproduction have appeared or will shortly, and reference can be made to them for other points of view (Fell, 1974a, 1983, in press; Reiswig, in press; Sara, in press; Simpson, in press ...
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