Observations on the Life History of Diplectrum pacificum and D. macropoma (Pisces, Serranidae) from the Bay of Panama

Files
v31n1-49-60.pdf (4.72 MB)
Date
1977-01
Authors
Bortone, Stephen A.
Contributor
Advisor
Department
Instructor
Depositor
Speaker
Researcher
Consultant
Interviewer
Journal Title
Journal ISSN
Volume Title
Publisher
University of Hawaii Press
Volume
Number/Issue
Starting Page
Ending Page
Alternative Title
Abstract
Diplectrum pacificum and D. macropoma were collected in abundance from January through February 1973 at a depth of 20-30 m in the Bay of Panama. Juvenile D. pacificum apparently occur in shallow water (less than 2 m). The substrate where adults of both species occur sympatrically is fine sand and silt bottom with some shell. Both species display nearly identical negative allometric growth. Diplectrum pacificum reaches a maximum size of 219 mm standard length. The oldest specimens were from age-group 6. Diplectrum macropoma attains a maximum size of 130 mm standard length. The oldest specimens were from age-group 4. Both species tend to aggregate in definite size groups. Both species feed predominately on small shrimp and other crustaceans. Diplectrum pacificum tends to select larger shrimp than does D. macropoma. Reproductively, both species are synchronous hermaphrodites. Testicular tissue is restricted to a morphologically distinct, species-specific area. Mature eggs pass into an ovarian sinus before being deposited. Sperm and ovarian ducts exit separately. No evidence was found of internal self-fertilization in either species. Behaviorly, both species show an affinity for the substrate and display color patterns that are similar to the active-inactive color pattern described for another related species, D. formosum.
Description
Keywords
Citation
Bortone SA. 1977. Observations on the life history of Diplectrum pacificum and D. macropoma (Pisces, Serranidae) from the Bay of Panama. Pac Sci 31(1): 49-60.
URI
http://hdl.handle.net/10125/1181
Extent
Format
Geographic Location
Time Period
Related To
Rights
Rights Holder
Collections
Pacific Science Volume 31, Number 1, 1977
Email libraryada-l@lists.hawaii.edu if you need this content in ADA-compliant format.