Development, Reproduction and Growth Pattern of two Coexisting, Pond Dwelling Cladocerans

✍ Scribed by Gerhard Maier

• Book ID: 102871068
• Publisher: John Wiley and Sons
• Year: 1992
• Tongue: English
• Weight: 619 KB
• Volume: 77
• Category: Article
• ISSN: 1434-2944
• DOI: 10.1002/iroh.19920770407

✦ Synopsis

Laboratory investigations on life history paramaters of 2 coexisting cladocerans (Daphnia ohfusa.

Moina hrachiafa) from a nearly temporary pond in South Germany revealed that the species have different temperature tolerances and temperature optima. D. obrusa experienced the highest reproductive success at 15 and 20 "C and was able to survive and to reproduce at 2 "C but died at 30 "C. The reproductive success of M. hrachiafa was highest at 25 and 30 "C and the species could not withstand temperatures <15 "C and 235 "C. At temperatures between approximately 20 and 25 "C, where both cladocerans coexisted in nature, M. hrachiafa showed a faster population growth due to its approximately twofold higher egg production rates (10-12 eggs female-' day-' compared to approximately 5 eggs female-' day-l in D.obtusa) and its shorter juvenile development (3.3 and 2.4 days compared to 6.3 and 5.3 days in D. ohfusa); M. hrachiafa needs generally only 3 molts to reach maturity while D. ohtusa requires 5-6 molts.