Skip Navigation

This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in ISI Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrow Search for citing articles in:
ISI Web of Science (9)
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Hall, C. J.
Right arrow Articles by Burns, C. W.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Hall, C. J.
Right arrow Articles by Burns, C. W.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

Journal of Plankton Research Vol.23 no.1 pp.97-104, 2001
© Oxford University Press 2001

Effects of Salinity and Temperature on Survival and Reproduction of Boeckella hamata (Copepoda: Calanoida) from a Periodically Brackish Lake

Catherine J. Hall,1 and Carolyn W. Burns

Department of Zoology, University of Otago, PO Box 56, Dunedin, New Zealand

1 To whom correspondence should be addressed

The freshwater calanoid copepod, Boeckella hamata Brehm, occurs periodically in Lake Waihola, New Zealand, a shallow, tidally-influenced lake that experiences daily and seasonal fluctuations in salinity, and seasonal changes in temperature. To determine whether these environmental changes might contribute to the copepod's disappearance from the lake in summer, we tested the survival and egg production of B. hamata at a range of salinities (20-3000 mg–1 Cl) and two temperatures (10°C, 20°C). Adults survived for 20 days or more only at salinities <=1000 mg l–1 Cl; survival was higher at 10°C than at 20°C, and higher for females (86% at 10°C, 14% at 20°C) than males (43% at 10°C, 0% at 20°C). The mean total eggs produced per female in three successive clutches decreased with temperature from 20 eggs at 10°C to 15 at 20°C; egg production rates increased, however, as clutches were produced more frequently. Staged increases in salinity did not increase copepod survival, indicating that B. hamata adults cannot tolerate the magnitude, or rate, of seasonal fluctuations in salinity to which they are exposed in the lake. We conclude that the ability of B. hamata to tolerate warm, saline conditions influences its presence and role in brackish ecosystems.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?


This article has been cited by other articles:


Home page
 J PLANKTON RESHome page
H. Bi and M. C. Benfield
Egg production rates and stage-specific development times of Clausocalanus furcatus (Copepoda, Calanoida) in the northern Gulf of Mexico
J. Plankton Res., December 1, 2006; 28(12): 1199 - 1216.
[Abstract] [Full Text] [PDF]


Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.