NDLI: Small-scale demographic variability of the biocolor damselfish, Stegastes partitus, in the Florida Keys USA

Content Provider	Springer Nature Link
Author	Figueira, Will F. Lyman, Sean J. Crowder, Larry B. Rilov, Gil
Copyright Year	2007
Abstract	The demographic responses of reef fish to their environment can be complex and in many cases, quite strong. Growth, mortality, longevity, and even reproductive effort have been demonstrated to vary for the same species of reef fish over scales of 100s to 1,000s of kilometers due to physiological and ecological interactions. Though few studies have explicitly documented it, this sort of habitat-mediated demography can also exist at very local scales. Here we present the results of a 2-year study of the bicolor damselfish, Stegastes partitus, in the Florida Keys, USA. We measured density and distribution, calculated key demographic rates (growth, survival, and fecundity), and characterized the environment (resident fish assemblage, substrate type and complexity, and food availability) of populations living in two adjacent but different habitats, the continuous fore reef and patchy back reef. Fish on the fore reef had an elevated growth rate and asymptotic size, increased mortality, and higher fecundity than fish on the back reef. We identified four potential causative mechanisms for these differences: food availability; competition; intraspecific density-dependent effects; and predation risk. Our data did not support an effect of either food availability or intraspecific density-dependence, but rather suggested that demographic responses are affected by both competition and predation risk.
Starting Page	297
Ending Page	311
Page Count	15
File Format	PDF
ISSN	03781909
Journal	Environmental Biology of Fishes
Volume Number	81
Issue Number	3
e-ISSN	15735133
Language	English
Publisher	Springer Netherlands
Publisher Date	2007-01-26
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Fecundity Growth Survival Coral reef fish Habitat Plasticity Nature Conservation Environment Animal Systematics/Taxonomy/Biogeography Zoology Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Ecology, Evolution, Behavior and Systematics

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