Main Title |
Effect of Intraspecific Density on Life History Traits and Population Growth Rate of 'Neanthes arenaceodentata' (Polychaeta: Nereidae) in the Laboratory. |
Author |
Pesch, C. E. ;
Zajac, R. N. ;
Whitlatch, R. BB. ;
Balboni, M. A. ;
|
CORP Author |
Science Applications International Corp., Narragansett, RI.;Environmental Research Lab., Narragansett, RI. |
Publisher |
c1987 |
Year Published |
1987 |
Report Number |
EPA-68-03-3529; EPA/600/J-87/502 ; ERLN-820 |
Stock Number |
PB90-125840 |
Additional Subjects |
Worms ;
Marine biology ;
Water pollution ;
Life cycles ;
Density(Mass/volume) ;
Populations ;
Survival ;
Reproduction(Biology) ;
Growth ;
Responses ;
Toxicity ;
Reprints ;
Neanthes ;
Polychaeta
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB90-125840 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
12p |
Abstract |
The effects of intraspecific density on life history traits and population dynamics of the nereid polychaete Neanthes arenaceodentata Moore were assessed in a laboratory experiment. Survival, growth, and fecundity were measured for one generation of worms at densities of 40, 80 and 160 worms per 840 cu cm. Density did not affect size (prior to pairing), percentage of worms paired, time to pairing, or size of mature paired males. Density did have a significant negative effect on survival, size of mature paired females, time to spawning, percentage of females that reproduced, and number of eggs per reproducing female. As density increased, mean survival was 90.0, 80,8 and 74.0%; mean size of mature females was 52.2, 49.2 and 48.1 segments. Increased density reduced the potential population growth rate, for a given rate of larval survivorship, was lower in the 2x and 4x treatments than the 1x treatment. Analysis of sensitivity of to changes in survivorship indicated that population growth rate at the highest density was sensitive to both changes in larval survivorship. |
Supplementary Notes |
Pub. in Marine Biology, v96 p545-554 1987. Sponsored by Environmental Research Lab., Narragansett, RI. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Effect of Intraspecific Density o n Life History Traits and Population Growth Rate of 'Neanthes arenaceodentata' (Polychaeta: Nereidae) in the Laboratory. |
Category Codes |
47D; 68D; 57Y |
NTIS Prices |
PC A03/MF A01 |
Primary Description |
600/05 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
002515549 |
Origin |
NTIS |
Type |
CAT |