By I. Assenmacher, D. S. Farner (auth.), Ivan Assenmacher MD, DSc, Donald S. Farner PhD, DSc (eds.)
From eleven to fifteen July 1977 approximately 60 physiologists, endo crinologists, ecologists and different biologists from 14 nations convened on the college Montpellier for a symposium on Environmental Endocrinology. This meet ing used to be equipped as a satellite tv for pc Symposium of the twenty seventh overseas Congress of Physiological Sciences, Paris, 18-23 July 1977. This quantity is a list of the com munications offered on the symposium. The targets of this system have been to envision the function of the endocrine process in a large spectrum of alterations and diversifications to adjustments in environmental stipulations through a variety of spe cies of animals, together with guy, and to advertise an ex switch of principles between investigators who've approached those features from different points. the variety of the knowledge and ideas communicated is superb. Of necessity, they signify in basic terms an incredibly modest se lection of the numerous elements of endocrine functionality within the interplay of animals with their environments. Be yond the usefulness of the communications separately, we are hoping that they jointly show the substan tial heuristic price of the idea that of environmental endocrinology because it used to be perceived through the individuals. We recognize gratefully the kindness and sympathy of Professor Jaques ROUZAUD, President of the collage of Montpellier II, for his beneficiant extension of the hospitality of the college to the Symposium. we're so much thankful to Mrs. Monique VIEU who effected so good the secretarial association of the Sympos.
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Additional info for Environmental Endocrinology: Proceedings of an International Symposium, Held in Montpellier (France), 11 – 15, July 1977
Sample text
Only for some tropical species is there occasional reference to continuous breeding throughout the year. Thus, CHURCH (1962) has observed continuous breeding in several species of geckos in Java; and in Malaysia, BERRY and LIM (1967) have noted females of the aquatic, ovoviviparous snake, Hopolopsis buaaatta, with large ovarian follicles and oviducal eggs during every month. Even in the tropics, however, many reptiles have seasonal reproductive patterns. The female equatorial lizard, Agama agama lionotus, for example, produces eggs only in July and August in Kenya, even though males have testes with bunched spermatozoa throughout the year (MARSHALL and HOOK, 1960).
Aust. J. Man. Freshwater Res. : Photoperiod and temperature control in the regulation of reproduction in the female catfish Heteropneustes fossilis. J. Fish. Res. Bd. Can. L. DE: Effects of photoperiod and temperature on gonadal activity in the cyprinid teleost, Notemigonus arysoleuaas. Biol. Bull. L. DE: Environmental and endocrine control of teleost reproduction. In: Control of Sex in Fishes. B. ). Blacksburg: Virginia Polytechnic Institute and State University, 1974, pp. L. DE: Environmental control of teleost reproductive cycles: a brief review.
The findin2 that toads may breed when kept during winter at temperatures of 13 C or more shows, however, that hibernation, or exposure to low temperatures are not indispensable environmental factors for oocyte rna tura tion and ovulation in Bufo bufo bufo populations in Denmark. It remains to be seen whether populations of Bufo bufo bufo in Denmark and Bufo bufo asiaticus in the Shanghai region (SU and YU-LAN, 1963a, b) differ in the role low temperature during winter and/or hibernation plays in follicle maturation.
