Results 221 to 230 of about 111,893 (264)

Larval development of Toxocara canis in dogs

Veterinary Parasitology, 2011
The 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, Eva-Maria, Laabs, Claudia, Welz   +2 more
openaire   +2 more sources

Larvae and Larval Development of Monogeneans

1963
Publisher 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.
openaire   +3 more sources

Larval development of hyolithids

Lethaia, 1978
The 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.
openaire   +1 more source

Larval development in Cnidaria: A connection to bilateria?

genesis, 2001
AbstractSummary: Among the basal animal phyla, the Cnidaria display many characteristics similar to the Bilateria (the higher Metazoa). However, the relation of that outgroup phyla to the Bilateria is still equivocal. Additionally to morphological and genetic data, studies on cnidarian embryogenesis are essential to clarify the Cnidaria‐Bilateria ...
H, Gröger, V, Schmid
openaire   +2 more sources

Larval Development of Limnoperna Fortunei

2015
Mature 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.
openaire   +2 more sources

Larval development of Myzostoma cirriferum (Myzostomida)

Journal of Morphology, 2003
AbstractThe larval development of Myzostoma cirriferum is described by means of SEM, TEM, and cLSM. It is similar to that of other myzostomids and includes three stages: the protrochophore, the trochophore, and the metatrochophore. The protrochophore is a ball‐shaped larva present in culture from 18–48 h after egg laying.
Eeckhaut, I., Fievez, Laurence, Muller, M. C.   +2 more
openaire   +2 more sources

Larval development of Gobius xanthocephalus with genetic validation of larval identification

Journal of Fish Biology, 2008
Larval 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., Borges, Rita Alexandra, Robalo, Joana Isabel, Almada, Vítor Carvalho, Henriques, S., Gonçalves, Emanuel João   +5 more
openaire   +2 more sources

Food selection in larval fruit flies: dynamics and effects on larval development

Naturwissenschaften, 2013
Selecting 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, Zachary, Durisko, Reuven, Dukas   +2 more
openaire   +2 more sources

Phylogenetic analyses of mode of larval development

Seminars in Cell & Developmental Biology, 2000
Phylogenies based on morphological or molecular characters have been used to provide an evolutionary context for analysis of larval evolution. Studies of gastropods, bivalves, tunicates, sea stars, sea urchins, and polychaetes have revealed massive parallel evolution of similar larval forms.
openaire   +2 more sources

Gill Development of Larval Walleyes

Transactions of the American Fisheries Society, 1999
Abstract 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
openaire   +1 more source