scholarly journals Testing zooplankton secondary production models against Daphnia magna growth

2012 ◽  
Vol 69 (3) ◽  
pp. 421-428 ◽  
Author(s):  
May Gómez ◽  
Ico Martínez ◽  
Ismael Mayo ◽  
José Miguel Morales ◽  
Angelo Santana ◽  
...  
Keyword(s):  
Daphnia Magna ◽  
Population Ecology ◽  
Growth Rates ◽  
Secondary Production ◽  
Time Course ◽  
Dry Mass ◽  
Production Rates ◽  
Marine Copepod ◽  
Production Models ◽  
Freshwater Crustacean

Abstract Gómez, M., Martínez, I., Mayo, I., Morales, J. M., Santana, A., and Packard, T. T. 2012. Testing zooplankton secondary production models against Daphnia magna growth. – ICES Journal of Marine Science, 69: 421–428. Modelling secondary production rates in the zooplankton is essential for population ecology studies, but assessing these rates is difficult and rarely done. Here, five secondary production models are tested by measuring Daphnia magna growth. To provide a range of growth rates, Daphnia were cultured under three different nutrition regimes (yeast, cornflour, and phytoplankton). Length and biomass were monitored daily in three simple time-course experiments to provide the growth rates, which ranged from 0.11 to 0.30 d–1 with secondary production rates of 350–643 µg dry mass d−1. Secondary production was predicted best by the freshwater crustacean-based model of Stockwell and Johannsson (1997). Marine copepod-based marine models were totally unsuitable.

Growth and secondary production of Paracapnia angulata Hanson (Plecoptera; Capniidae) in Appalachian streams affected by acid precipitation

1993 ◽  
Vol 71 (4) ◽  
pp. 735-743 ◽  
Author(s):  
Michael B. Griffith ◽  
Sue A. Perry ◽  
William B. Perry
Keyword(s):  
Growth Rates ◽  
Secondary Production ◽  
Specific Growth ◽  
Acid Precipitation ◽  
Dry Mass ◽  
Low Ph ◽  
The Other ◽  
Biomass Ratio ◽  
Specific Growth Rates ◽  
Appalachian Streams

Paracapnia angulata in West Virginia occurs in headwater streams that range in pH from 4.5 to 7.5. It is representative of a number of species of Plecoptera, which often increase in abundance in acidic streams because they are tolerant of low pH and related changes in water quality associated with acid precipitation. We compared growth rates and secondary production of P. angulata in four streams, SFR, WS4, WS3, and HSR, in which mean streamwater pH was 4.26, 5.99, 6.07, and 7.48, respectively. Mean specific growth rates, in terms of dry mass for P. angulata, were higher in the two neutral streams than in the more alkaline stream or the acidic stream. Secondary production of P. angulata was highest in the acidic stream SFR, 106.2 ± 16.4 mg∙m−2∙yr−1 (mean ± 2 SE), and was 34.0 ± 12.1 mg∙m−2∙yr−1 in WS4, 32.7 ± 3.8 mg∙m−2∙yr−1 in WS3, and 35.4 ± 3.6 mg∙m−2∙yr−1 in HSR. The increased secondary production of P. angulata was related to greater mean abundance and biomass in SFR; and the production/biomass ratio for this acidic stream was lower than for the other streams.

Development of Trip Production Rates for Synthesized Households

1998 ◽  
Vol 1625 (1) ◽  
pp. 79-85 ◽  
Author(s):  
Shari P. Scobee ◽  
Michael DuRoss ◽  
Edward C. Ratledge
Keyword(s):  
Household Member ◽  
University Of Delaware ◽  
Production Rates ◽  
Survey Nonresponse ◽  
Household Level ◽  
Travel Survey ◽  
Production Models ◽  
Trip Production ◽  
Household Travel ◽  
The University

Survey nonresponse bias is an important consideration in the development of survey designs for transportation studies. Researchers at the University of Delaware have developed a technique for reducing the survey nonresponse, as well as the cost of the travel survey. The method involves obtaining complete household and person characteristics for each household member; however, detailed travel data are gathered for only one randomly selected household member. Although the University of Delaware survey technique provides multiple benefits with respect to survey response rates and costs, it presents complications for travel model developers, particularly with respect to the development of trip production models. Because the trip production models are typically developed at the household level, the person-level trip rates from such a survey need to be expanded to represent a household’s trip rates. A method is presented for generating synthesized household trip production rates by using the 1995/96 Delaware Household Travel Survey, which gathered travel information for only one household member.

Macroinverfebrate Abundance and Production of Psammophifous Chironomidae in Shifting Sand Areas of a Lowland River

1985 ◽  
Vol 42 (7) ◽  
pp. 1296-1302 ◽  
Author(s):  
Daniel A. Soluk
Keyword(s):  
Benthic Macroinvertebrates ◽  
Secondary Production ◽  
Unit Area ◽  
Larval Growth ◽  
Dry Mass ◽  
Total Biomass ◽  
River Bed ◽  
Chironomid Species ◽  
Shifting Sand ◽  
Macroinvertebrate Density

Abundance and biomass of benthic macroinvertebrates from shifting sand areas in the bed of the Sand River in central Alberta, Canada, were examined for 1 yr. Macroinvertebrate density ranged from 12 000 to 78 000 individuals/m2, but total biomass was low (50–490 mg/m2 dry mass) due to the small size of most organisms. The interstitial larvae of two chironomid species (Robackia demeijerei and Rheosmittia sp.) contributed a mean of 80.6% biomass and 92.8% of total number of macroinvertebrates. Total annual secondary production of these two species (752.0 ± 144.5 mg∙m−2∙yr−1) was used as an estimate of total secondary production of benthic macroinvertebrates in shifting sand areas. Both R. demeijerei and Rheosmittia sp. exhibited larval growth and development rates much slower than those reported for comparably sized species in other habitats. Food or frequent disturbance may limit the growth of these species. Although unit area biomass and production were low relative to other lotie habitats, shifting sand areas make significant contributions to the river ecosystem because they occupy a large proportion of the river bed.

Allometric Models of Simuliid Growth Rates and Their Use for Estimation of Production

1988 ◽  
Vol 45 (2) ◽  
pp. 315-324 ◽  
Author(s):  
Antoine Morin ◽  
Michel Constantin ◽  
Robert Henry Peters
Keyword(s):  
Water Temperature ◽  
Significant Influence ◽  
Growth Rates ◽  
Dry Mass ◽  
Published Data ◽  
Power Relationship ◽  
Square Root ◽  
Allometric Model ◽  
Simulium Vittatum ◽  
Individual Mass

Growth rates of Prosimulium mixtum/fuscum, Stegopterna mutata, and Simulium vittatum are described in relation to individual mass, water temperature, and seston quality in the outlet of Lake Orford (southern Quebec) in the winter of 1985–86. Growth rates in mass (G, per day) of the three species were similar and inversely related to dry mass (DM, micrograms) following the power relationship G = 0.11 DM−0.28; neither water temperature nor seston abundance and quality varied sufficiently during the study period to have a significant influence on growth rates. The allometric model was used to estimate production of the three species, and the resulting estimates are compared with cohort methods and size–frequency estimates. Large larvae were responsible for most of the production, and most of the production occurred before the spring rise in water temperature. Measured growth rates in winter are significantly lower than those reported for simuliids in warmer waters. A reanalysis of published data shows that growth rates of simuliids increase as the square root of water temperature (T, degrees Celsius) (G = 0.08 DM−0.21 T0.48).

Important Factors for Estimating Annual Phytoplankton Production in the Experimental Lakes Area

1980 ◽  
Vol 37 (3) ◽  
pp. 513-522 ◽  
Author(s):  
Everett J. Fee
Keyword(s):  
Growth Rates ◽  
Coefficient Of Variation ◽  
Annual Production ◽  
Phytoplankton Production ◽  
Production Rates ◽  
Experimental Lakes Area ◽  
Basin Morphometry ◽  
Chlorophyll Distribution ◽  
The Common

Annual phytoplankton growth rates from 21 lakes in the Experimental Lakes Area (ELA) for the 4-yr period 1973–76 are reported. The coefficient of variation of production in most lakes over this period was about 20%. This variability was the same for both control and experimental lakes. Subthermocline populations were quantitatively unimportant in eutrophied basins but up to 50% of annual production occurred in hypolimnion chlorophyll peaks in some transparent control lakes. The exact details of chlorophyll distribution as monitored with an in vivo fluorometer are unnecessary for accurate measurements of production, even in lakes having hypolimnion chlorophyll peaks. Annual production rates were about 80% of the rates predicted with simulated cloudless weather. The common practice of not correcting production estimates for basin morphometry when reporting areal production rates resulted in overestimation of productivity by roughly 20%. The results indicate several ways for simplifying the numerical primary production model.Key words: production, morphometry, models, limnology, Experimental Lakes Area, incubator

Temperature-Dependent Growth and Production by a Marine Copepod

1981 ◽  
Vol 38 (1) ◽  
pp. 77-83 ◽  
Author(s):  
I. A. McLaren ◽  
C. J. Corkett
Keyword(s):  
Growth Rates ◽  
Life Cycles ◽  
Temperature Dependent ◽  
Marine Copepod ◽  
Development Times ◽  
Body Sizes ◽  
Eurytemora Herdmani ◽  
Growth Production ◽  
Dependent Growth ◽  
Specific Growth Rates

Highly synchronous cohorts of the copepod Eurytemora herdmani at a station near Halifax, Nova Scotia, were followed in samples taken during late July and early August, 1980. Individuals from the same population were reared in the laboratory from copepodite I (CI) to adult in conditions of food satiation. Development times and adult body sizes in nature were about the same as predicted for comparable temperatures in the laboratory. Weight increments between CI and adult male in samples from nature were exponential. Females became heavier, because of eggs, after CIII, but developed more slowly, so that their specific growth rates were about the same as for males. Production estimated from weights and stage increments in successive samples (cohort method) was adequately predicted from biomasses in samples and temperature-dependent development times from the laboratory. Production of egg matter by adult females was also adequately predicted by temperature-dependent growth rates of younger stages. These "rules" of development, growth, and production need wider empirical testing and theoretical justification.Key words: Copepoda, temperature, life cycles, development, growth, production

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