Annual production of Corydalus cornutus (Megaloptera) in the Guadalupe River, Texas

Annual production of the predaceous stream insect Corydalus cornutus (Megaloptera) was determined at five sites along the longitudinal profile of the Guadalupe River in S-central Texas using the size-frequency method. Production values progressively decreased from 22.9 g ash-free dry mass/m2/year to...

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Bibliographic Details
Published in:The American midland naturalist 1987-10, Vol.118 (2), p.433-438
Main Authors: Epperson, C.R, Short, R.A
Format: Article
Language:English
Subjects:
AMBIENTE ACUATICO
Animal and plant ecology
Animal, plant and microbial ecology
Animals
AQUATIC ENVIRONMENT
Aquatic insects
Autoecology
Biological and medical sciences
BIOMASA
BIOMASS
BIOMASSE
COURS D'EAU
CURSOS DE AGUA
DEPREDADORES
DINAMICA DE LA POBLACION
DYNAMIQUE DES POPULATIONS
Freshwater ecology
Fundamental and applied biological sciences. Psychology
Insect larvae
INSECTE
INSECTOS
INSECTS
Instars
Life cycle
Marine ecology
MILIEU AQUATIQUE
POPULATION DYNAMICS
PREDATEUR
PREDATORS
Protozoa. Invertebrata
RIVERS
Secondary productivity
Species
Streams
TEXAS
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Description
Summary:Annual production of the predaceous stream insect Corydalus cornutus (Megaloptera) was determined at five sites along the longitudinal profile of the Guadalupe River in S-central Texas using the size-frequency method. Production values progressively decreased from 22.9 g ash-free dry mass/m2/year to 4.6 g ash-free dry mass/m2/year from the upstream to the downstream site. These values are among the highest reported for a single species of aquatic insect.
ISSN:0003-0031
1938-4238
DOI:10.2307/2425800