MOdel Shopping Tool ( MOST )
NEMURO.FISH - Model description
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| Model Name | NEMURO.FISH - A Fish Stock component coupled to CCSR COCO 3.4 hydrodynamics and NEMURO biogeochemistry | ||
| Summary | The growth of an individual herring is followed daily as the difference between consumption and the losses due to respiration, specific dynamic action, egestion, excretion, and reproductive output. Formulas and parameters for the individual components in the bioenergetics model follow the terminology and symbols used in the Wisconsin bioenergetics models (Hanson et al., 1997). For some processes, we use formulations and parameter values specific to age-0 (youngof-the-year), age-1, and age-2+ (age-2 and older) herring. Bioenergetics models have been widely applied to freshwater and marine fish species (Ney, 1990, 1993; Hanson et al., 1997). Most model formulation and parameters for Pacific herring followed the approach used by Rudstam (1988) for Atlantic herring (C. harengus).
The bioenergetics NEMURO.FISH model is dynamically coupled to the biogeochemical 12-state-variable, nitrogen-based NEMURO model (see description in MoST database). The bioenergetics and NEMURO models are solved simultaneously. Zooplankton prey groups determine the consumption term of the fish bioenergetics model, and are, in turn, reduced by the amount eaten by the herring. Herring excretion is added to the ammonium pool of NEMURO, and herring egestion waste is added to the PON pool. NEMURO represents time in units of s, while the fish model operates on daily rates. Linkages between the NEMURO and fish models therefore involved fish models rates expressed as annual or daily rates being converted into rates expressed in s for the NEMURO.FISH system of differential equations. All differential equations were solved using a fourth-order Runge–Kutta numerical integration routine using a time step of 1 d. |
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| Developer contact | MEGREY Bernard - National Oceanic and Atmospheric Administration | ||
| Model Focus | Life History () Resources Management () Trophic level coupling () | ||
| References |
![[NEMUROFISH.jpg]](../Scripts_PHP/AfficheSmallJPG.php?imgPath=..%2Fmodel_schematic%2FNEMUROFISH.jpg&Width=250) |
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Application to | |||
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| EO System Applied to | North Pacific, , | ||
| Trophic Level of Focus | small fish | ||
| Functional groups |
TL 4: TL 3: herring stock TL 2: TL 1: TL 0: |
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| Hydrodynamics provided by | CCSR COCO 3.4 | ||
| Approach | Eulerian | ||
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Downloads and external links | |||
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