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Serotonergic neurotransmission in the bivalve Venus verrucosa (Veneridae): a neurochemical and immunohistochemical study of the visceral ganglion and gonads
Findings suggest the existence of a serotonergic neurotransmission in V. verrucosa, possibly regulating the reproductive process. Expand
Artificial diet rearing system for the silkworm Bombyx mori (Lepidoptera: Bombycidae): effect of vitamin C deprivation on larval growth and cocoon production
Results show that L-ascorbic acid absence from larval food, particularly during the first and last instars, generates beneficial effects to cocoon production without affecting the survival rate or delaying the larval cycle. Expand
Ecdysteroid titres and location in developing eggs of Schistocerca gregaria
Eccdysteroid levels in the separated embryo and yolk fractions of Schistocerca gregaria eggs have been determined at each of the developmental stages, finding that at the beginning of embryonic development the ecdysteroids occur only in the yolk whereas, after blastokinesis, they are found in the embryo. Expand
Fine structure of the integumental glands of a termite soldier.
The dissimilar appearance of the secretion granules present in glands of different soldiers suggests that the electron-lucid granules and the granules with fibrils are two completely different secretions at different ages of the animal. Expand
Effect of juvenile hormone on caste determination and colony processes in the bumblebee Bombus terrestris
It is demonstrated that a single application of JH in the first or second instar can lead to the development of queens and that this effect is dose‐ and instar‐dependent. Expand
Frequency of some behavioural patterns in colonies of Kalotermes flavicollis (Isoptera Kalotermitidae): the importance of social interactions and vibratory movements as mechanisms for social
Vibratory movements, especially those performed by nymphs, appear to communicate short-term colony needs through mechanicaltactile stimulation, and interactions with the reproductives emphasize the key role they assume in receiving and transmitting signals on which the regulation of social equilibrium is probably based. Expand
A morphological and ultrastructural study of Telosentis exiguus (Acanthocephala, Palaeacanthocephala)
Abstract Scanning electron microscope observations on Telosentis exiguus (Acanthocephala), an endoparasite of Atherina boyeri (Osteichthyes, Atherinidae), provided more detailed and precise data onExpand
Ultrastructure and morphogenesis of the abdominal integumental gland of Schistocerca gregaria forsk. (Orthoptera: Acrididae)
The morphogenesis and the structures of the abdominal glands in the late 4th and 5th instar nymphs of Schistocerca gregaria are described and it is shown that the ciliary and enveloping cells die, and their remains are incorporated by the surrounding epidermal cells. Expand
The embryonic apolyses of Schistocerca gregaria (Orthoptera)
The origin and differentiation of the ecdysial glands and the appearance of the cuticles were studied in embryos of Schistocerca gregaria and in headless embryos explanted in vitro, finding evidence of a cyclic glandular activity in the embryos. Expand