The Autecology of Eudiaptomus cf drieschi (Poppe & Mrazek 1895 ...

More documents

Recommendations

Info

segmented leg and the next leg bud appears. It is possible to distinguish between the sexes by stage C IV as all five legs are present, but not fully developed. Development is completed by stage C V. Eudiaptomus drieschi densities in Lake Kinneret, Station A Number of organisms L -1 20 10 0 1970 3.2 Seasonal Distribution Figure 6: Multi annual population density of E. drieschi in the Kinneret Densities (number per liter) of E. drieschi from the KLL database (Fig. 6) show the appearance in the lake of this organism from 1986. Overall copepod biomass (g m -2 ) over the study period is shown in Fig. 7a. The Copepoda make up approximately 35% of total zooplankton biomass. E. drieschi contributes less than 3% to the total zooplankton biomass (Fig. 7b).
25 Monthly Copepod Biomass 25.0 20.0 15.0 10.0 5.0 0.0 Jan-96 Apr Jul Oct Jan-97 Apr Jul Oct Jan-98 Apr Jul Oct Jan-99 Apr Jul Oct Jan-00 Apr g -1 m 2 Jul Oct a.) Contribution of E. drieschi biomass to Total Zooplankton Biomass 2.4% 2.0% 1.6% 1.2% 0.8% 0.4% 0.0% b.) Figure 7: a) Total monthly copepod biomass (g/m 2 ) in L. Kinneret. b) Percent E. drieschi biomass to total zooplankton biomass. E. drieschi does not produce identifiable cohorts, but reproduces continuously throughout the months it is found in the water column (Dec-Jul) as indicated by the rate of change (Fig. 8a). Instantaneous birth rate (b) is quite similar to instantaneous death rate (d) shown in Figs, 8b, c. The calculated instantaneous rate of change is small, thus giving the population the appearance of being in “steady-state”. Daily secondary production (biomass accumulated per unit time) to biomass was calculated for the years 1996-98. The P/B ratios for cyclopoid copepods in the Kinneret range from: 0.10-0.16. The P/B ratios of E. drieschi from 1996-97 show a slightly higher secondary production rate with a decline beginning in 1998 (Fig. 9a-d). Ratios of 0.1- 0.22 have been found for species of Diaptomus in eutrophic lakes (Ponyi et al 1982).
Page 1 and 2: The Autecology of Eudiaptomus cf dr
Page 3 and 4: Table of Contents Page Abstract Res
Page 5 and 6: Abstract Prior to the mid-eighties,
Page 7 and 8: occupying a niche and using its ada
Page 9 and 10: 1. General Introduction 1.1 Kinnere
Page 11 and 12: Over 30 different zooplankton speci
Page 13 and 14: The National Water Carrier, which w
Page 15 and 16: (Baird 1859); Arctodiaptomus (Arcto
Page 17 and 18: 2. Methods and Materials 2.1 Season
Page 19 and 20: (>20 µm) and nano (20 m) and nano
Page 21 and 22: Stock preparations Females with rip
Page 23 and 24: when the population meets condition
Page 25 and 26: 2.4.4. Food Requirements Mature adu
Page 27 and 28: c) b) a) d) e) • Figure 2: a) fem
Page 29: 23 The female antennules are symmet
Page 33 and 34: E. drieschi has a strong seasonal p
Page 35 and 36: Total Number of Organisms, L -1 80
Page 37 and 38: decline of E. drieschi in the water
Page 39 and 40: Average Depth of Individual = x 1 z
Page 41 and 42: Resting Egg Distribution in the Sed
Page 43 and 44: ) c) Figure 14: (a) resting egg fro
Page 45 and 46: 3.6 Development Development Time De
Page 47 and 48: Development Rate Post-embryonic dev
Page 49 and 50: 3.7 Salinity tolerance Survival of
Page 51 and 52: 4. Discussion 4.1 Taxonomical Posit
Page 53 and 54: 4.2 Ecological Implications of Deve
Page 55 and 56: seasonal abundance or intra-specifi
Page 57 and 58: distinguish resting eggs from subit
Page 59 and 60: ability as copepods mature. Diaptom
Page 61 and 62: 4.5.2 Temperature Temperature has b
Page 63 and 64: 4.5.3 Food Calanoid copepods in gen
Page 65 and 66: chloride. Between 1955-69, salinity
Page 67 and 68: This study offered the rare (and fo
Page 69 and 70: Beeton, A. M. (1981) General introd
Page 71 and 72: DeFrenza, J., Kirner, R.J., Maly, E
Page 73 and 74: Gophen, M. 1977. Food and feeding h
Page 75 and 76: Hanazato, T. and Yasuno, M. 1989. I
Page 77 and 78: Kawabata, K. 1989. Natural developm
Page 79 and 80: Norrbin, M.F. 1994. Seasonal patter
Page 81 and 82:
copepod species in the eastern Wedd
Page 83 and 84:
Implications for diel vertical migr
Page 85 and 86:
האאוטאקולוגיה של (Po
Page 87 and 88:
והוטלו שנה קודם לכך
Page 89:
האאוטאקולוגיה של (Po
show all

The Autecology of Eudiaptomus cf drieschi (Poppe & Mrazek 1895 ...

Create successful ePaper yourself

Delete template?

Save as template?