منابع مشابه
Juvenile versus adult competition
A general class of age-structured models based upon the McKendrick/ von Foerster equations are used to study intraspecific competit ion between juveniles and adults. Criteria for the existence and stability of equilibria are obtained and the dependence of equilibrium stability (i.e. equilibrium resilience) on competit ion coefficients is analyzed for low inherent net reproductive numbers. The r...
متن کاملJuvenile-adult habitat shift in permian fossil reptiles and amphibians.
Among extant large reptiles, juveniles often occupy different habitats from those of adults or subadults and thus avoid competition with and predation from the older animals; small juveniles often choose cryptic habitats because they are vulnerable to a wide variety of predators. Evidence from fossil humeri and femora of Early Permian reptiles collected from sediments of several distinct habita...
متن کاملDifferent HLA-D associations in adult and juvenile rheumatoid arthritis.
HLA-D typing was performed in 126 patients with juvenile rheumatoid arthritis. HLA-DW4, the antigen found in previous studies to characterize adult rheumatoid arthritis, had a significantly lower frequency in children with arthritis than in normal controls (P less than 0.04). By contrast, in children the antigens HLA-DW7 (P less than 0.03) and HLA-DW8 (P less than 0.01) were increased compared ...
متن کاملHabitat Associations of Juvenile Fish at Ningaloo Reef, Western Australia: The Importance of Coral and Algae
Habitat specificity plays a pivotal role in forming community patterns in coral reef fishes, yet considerable uncertainty remains as to the extent of this selectivity, particularly among newly settled recruits. Here we quantified habitat specificity of juvenile coral reef fish at three ecological levels; algal meadows vs. coral reefs, live vs. dead coral and among different coral morphologies. ...
متن کاملSaproxylic Hemiptera Habitat Associations
Understanding the habitat requirements of organisms associated with dead wood is important in order to conserve them in managed forests. Unfortunately, many of the less diverse saproxylic taxa, including Hemiptera, remain largely unstudied. An effort to rear insects from dead wood taken from two forest types (an upland pine-dominated and a bottomland mixed hardwood), three tree species (Liquida...
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ژورنال
عنوان ژورنال: Coral Reefs
سال: 2008
ISSN: 0722-4028,1432-0975
DOI: 10.1007/s00338-008-0357-8