Ecological characterizations of cytotypes of the Simulium venustum-verecundum complex (Diptera- simuliidae) found on the Avalon Peninsula, Newfoundland
The S. venustum/verecundum complex (Avalon Peninsula,Newfoundland) was examined to ascertain if individualcytotypes had unique and predictable ecological characteristics. Emphasis was placed on larval spatial-temporal distribution. Six cytotypes were found: EFG/C venustum, CC2-3 venustum (combined C...
Main Author: | |
---|---|
Format: | Thesis |
Language: | English |
Published: |
Memorial University of Newfoundland
1991
|
Subjects: | |
Online Access: | https://research.library.mun.ca/755/ https://research.library.mun.ca/755/1/McCreadie_JohnWilliam2.pdf https://research.library.mun.ca/755/3/McCreadie_JohnWilliam2.pdf |
id |
ftmemorialuniv:oai:research.library.mun.ca:755 |
---|---|
record_format |
openpolar |
spelling |
ftmemorialuniv:oai:research.library.mun.ca:755 2024-09-09T19:53:39+00:00 Ecological characterizations of cytotypes of the Simulium venustum-verecundum complex (Diptera- simuliidae) found on the Avalon Peninsula, Newfoundland McCreadie, John William 1991 application/pdf https://research.library.mun.ca/755/ https://research.library.mun.ca/755/1/McCreadie_JohnWilliam2.pdf https://research.library.mun.ca/755/3/McCreadie_JohnWilliam2.pdf en eng Memorial University of Newfoundland https://research.library.mun.ca/755/1/McCreadie_JohnWilliam2.pdf https://research.library.mun.ca/755/3/McCreadie_JohnWilliam2.pdf McCreadie, John William <https://research.library.mun.ca/view/creator_az/McCreadie=3AJohn_William=3A=3A.html> (1991) Ecological characterizations of cytotypes of the Simulium venustum-verecundum complex (Diptera- simuliidae) found on the Avalon Peninsula, Newfoundland. Doctoral (PhD) thesis, Memorial University of Newfoundland. thesis_license Thesis NonPeerReviewed 1991 ftmemorialuniv 2024-07-10T03:16:00Z The S. venustum/verecundum complex (Avalon Peninsula,Newfoundland) was examined to ascertain if individualcytotypes had unique and predictable ecological characteristics. Emphasis was placed on larval spatial-temporal distribution. Six cytotypes were found: EFG/C venustum, CC2-3 venustum (combined CC2 and CC3), AC(gb) venustum. AA verecundum and ACD verecundum. -- Larval cytotypes selected different macrohabitats. EFG/C and ACD were sublacustrine species; CC2-3 and AC(gb) preferred downstream sites. Within downstream habitats CC3 usually occurred in large streams and AC(gb) in cool canopied sites with a bed of small stones or rubble; CC2 was ubiquitous. AA preferred outlets and trickles. Cytotype fauna changed in a continuous, directional and predictable manner with increased distance from outlets. -- Abundance of CC2-3 increased with increasing seston and- discharge, and decreasing conductivity. AC(gb) abundance increased with increasing stream width. -- Larval cytotypes also selected different microhabitats. Optimal velocity for EFG/C and ACD was 0.36 and 0.71 m/s, respectively. EFG/C preferred shallow water but ACD showed no depth preference. These differences were not related to larval size. Maximum abundance of EFG/C occurred 10.5 - 16.O m from outlets; ACD was most abundant just below outlets. Proportionally more ACD and AA were found on vegetation than rocks; the reverse was true for EFG/C. The density of ACD and AA was higher on vegetation than rocks. -- Seasonal occurrence of cytotypes overlapped but population peaks were typically asynchronous. EFG/C appeared 1-5 weeks earlier than other cytotypes. ACD and AA appeared later and remained longer than other cytotypes. EFG/C was univoltine. AC(gb) may have a limited second generation. CC2-3 was bi- or multivoltine. ACD and AA were multivoltine. -- EFG/C complete larval development from 5 - 30°C with maximum survival between 15 - 20°C (68.0 - 73.5%). An ACD-AA mixed population completed development between 5 - 25°C with maximum survival between 15 - 25°C ... Thesis Newfoundland Memorial University of Newfoundland: Research Repository |
institution |
Open Polar |
collection |
Memorial University of Newfoundland: Research Repository |
op_collection_id |
ftmemorialuniv |
language |
English |
description |
The S. venustum/verecundum complex (Avalon Peninsula,Newfoundland) was examined to ascertain if individualcytotypes had unique and predictable ecological characteristics. Emphasis was placed on larval spatial-temporal distribution. Six cytotypes were found: EFG/C venustum, CC2-3 venustum (combined CC2 and CC3), AC(gb) venustum. AA verecundum and ACD verecundum. -- Larval cytotypes selected different macrohabitats. EFG/C and ACD were sublacustrine species; CC2-3 and AC(gb) preferred downstream sites. Within downstream habitats CC3 usually occurred in large streams and AC(gb) in cool canopied sites with a bed of small stones or rubble; CC2 was ubiquitous. AA preferred outlets and trickles. Cytotype fauna changed in a continuous, directional and predictable manner with increased distance from outlets. -- Abundance of CC2-3 increased with increasing seston and- discharge, and decreasing conductivity. AC(gb) abundance increased with increasing stream width. -- Larval cytotypes also selected different microhabitats. Optimal velocity for EFG/C and ACD was 0.36 and 0.71 m/s, respectively. EFG/C preferred shallow water but ACD showed no depth preference. These differences were not related to larval size. Maximum abundance of EFG/C occurred 10.5 - 16.O m from outlets; ACD was most abundant just below outlets. Proportionally more ACD and AA were found on vegetation than rocks; the reverse was true for EFG/C. The density of ACD and AA was higher on vegetation than rocks. -- Seasonal occurrence of cytotypes overlapped but population peaks were typically asynchronous. EFG/C appeared 1-5 weeks earlier than other cytotypes. ACD and AA appeared later and remained longer than other cytotypes. EFG/C was univoltine. AC(gb) may have a limited second generation. CC2-3 was bi- or multivoltine. ACD and AA were multivoltine. -- EFG/C complete larval development from 5 - 30°C with maximum survival between 15 - 20°C (68.0 - 73.5%). An ACD-AA mixed population completed development between 5 - 25°C with maximum survival between 15 - 25°C ... |
format |
Thesis |
author |
McCreadie, John William |
spellingShingle |
McCreadie, John William Ecological characterizations of cytotypes of the Simulium venustum-verecundum complex (Diptera- simuliidae) found on the Avalon Peninsula, Newfoundland |
author_facet |
McCreadie, John William |
author_sort |
McCreadie, John William |
title |
Ecological characterizations of cytotypes of the Simulium venustum-verecundum complex (Diptera- simuliidae) found on the Avalon Peninsula, Newfoundland |
title_short |
Ecological characterizations of cytotypes of the Simulium venustum-verecundum complex (Diptera- simuliidae) found on the Avalon Peninsula, Newfoundland |
title_full |
Ecological characterizations of cytotypes of the Simulium venustum-verecundum complex (Diptera- simuliidae) found on the Avalon Peninsula, Newfoundland |
title_fullStr |
Ecological characterizations of cytotypes of the Simulium venustum-verecundum complex (Diptera- simuliidae) found on the Avalon Peninsula, Newfoundland |
title_full_unstemmed |
Ecological characterizations of cytotypes of the Simulium venustum-verecundum complex (Diptera- simuliidae) found on the Avalon Peninsula, Newfoundland |
title_sort |
ecological characterizations of cytotypes of the simulium venustum-verecundum complex (diptera- simuliidae) found on the avalon peninsula, newfoundland |
publisher |
Memorial University of Newfoundland |
publishDate |
1991 |
url |
https://research.library.mun.ca/755/ https://research.library.mun.ca/755/1/McCreadie_JohnWilliam2.pdf https://research.library.mun.ca/755/3/McCreadie_JohnWilliam2.pdf |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_relation |
https://research.library.mun.ca/755/1/McCreadie_JohnWilliam2.pdf https://research.library.mun.ca/755/3/McCreadie_JohnWilliam2.pdf McCreadie, John William <https://research.library.mun.ca/view/creator_az/McCreadie=3AJohn_William=3A=3A.html> (1991) Ecological characterizations of cytotypes of the Simulium venustum-verecundum complex (Diptera- simuliidae) found on the Avalon Peninsula, Newfoundland. Doctoral (PhD) thesis, Memorial University of Newfoundland. |
op_rights |
thesis_license |
_version_ |
1809923117630357504 |