By Alessandro Minelli, Gherardo Ortalli, Glauco Sanga
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Soil microorganisms play an enormous function within the degradation and recycling of natural fabric. Microbes are concerned about the nutrition net and strongly give a contribution to soil fertility. long ago, realization was once more often than not directed in the direction of free-living or particle-bound microorganisms, whereas the function of intestinal microbes of soil animals has been missed.
Amphibians and reptiles are the main quite a few, assorted, and often encountered animals at the Caribbean islands. This ebook presents quite a few views in this extraordinary workforce of organisms. Caribbean Amphibians and Reptiles, compiled by means of a world staff of zoologists, takes a clean and specified examine the complicated organic puzzle of the Caribbean.
Long ago few years, the Fondation IPSEN has been expanding its task within the neurosciences, in particular through helping researchers engaged on Alzheimer's affliction. This curiosity within the topic is confirmed by means of a prize and a fellowship, that have been presented every year on account that 1985, a per thirty days e-newsletter, and a chain of Colloques Medecine et Recherche and their complaints that are disbursed world-wide.
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Bd. Scotland Ann. Rept. 28:73-79 Shann EW (1923) The embryonic development of the porbeagle shark, Lamna cornubica. Proc. ZooI. Soc. ) 11:161-171 Springer S (1948) Oviphagous embryos of the sand shark, Carcharias taurus. Copeia 1948: 153-157 Springer S, Sadowsky V (1970) Subspecies of the western Atlantic cat shark, Scyliorhinus retifer. Proc. BioI. Soc. Wash. 83:83-98 Thorson TB (1976) Observations on the reproduction of the sawfish, Pristis perotteiti, in Lake Nicaragua, with recommendations for its conservation.
BioI. Fish. Rasmussen LEL, Murra FL (1992) Long-term studies of serum concentrations of reproductively-related steroid hormones in individual captive carcharhinids. Aus. J. Mar. Freshwater Res. 43. Reese JC, Canard IP (1987) Receptors for estradiol-17-f3 in the oviduct of the skate, Raja erinacea. MDIBL 27:28-29 Schaeffer B (1967) Comments on Elasmobranch Evolution. ). Sharks, Skates and Rays. Johns Hopkins Press, Baltimore, Maryland. pp. 3-37 Schaeffer B, Williams M (1977) Relationship of fossil and living elasmobranchs.
Concentrations of steroid hormones in the serum of adult male elasmobranchs. Rasmussen Unpubl. Garnier et al. 1989 (continued) Idler and Truscott 1966 Idler and Truscott 1966 Fletcher et al. 1969 Rasmussen and Hess Unpubl. 1. 6 Dihydrotestosterone (ng/ml) Rasmussen and Gruber 1990 Rasmussen and Gruber 1990 Rasmussen Unpubl. L. L. H. GRUBER growth (Rasmussand and Gruber in press). Because of the limited sample size, we were not able to draw firm conclusions about seasonal influences on the serum steroid patterns although we suspect, as Garnier et al.