Contains generalist crab species such as: mud crabs (Neopanope packardii, Panopeus occidentalis, Dyspanopeus texanus and Rithropanopeus harrisii), spider crabs (Libinia dubia) pictured above, Eucratopsis spp. and members of the family Xanthidae.
Holmquist et al. 1989a, Holmquist
et al. 1989b, Matheson et al. in press.
| adjusted density | 1.3683 ind / m2 |
Holmquist et al. 1989a, Williams
1984, Matheson et al. in press.
Body masses were determined as a function of carapace width. Given that carapace widths are generally reported only as maximum values, an average size was estimated to reflect the population as a whole.
| carapace length | 12.1875 mm |
Williams 1984, Miller et al. 1975.
| 0.4011 | grams per individual |
| dw/ww | 0.1395 |
| C/dw | 0.45 |
| Dry season biomass | .3193685E-01 g C / m2 |
| Wet season biomass | .3552097E-01 g C / m2 |
Once a general P/B ratio was identified, it was scaled according to the seasonal production variability determined in Venier 1997.
| dry P/B | 2.3 |
| wet P/B | 2.5 |
de la Cruz-Aguero et al. 1993, Venier 1997, Jorgensen et al. 1991.
| wet season | .2098623E+00 | g C / m2/ y |
| dry season | .1297931E+00 | g C / m2/ y |
(see Detritivorous Gastropods in this network for methods used to determine these values.)
| wet season | .2758961E+00 | g C / m2/ y |
| dry season | .2414584E+00 | g C / m2/ y |
Jorgensen et al. 1991, McNeil and Lawton 1970, Humphreys 1979, Thayer et al. 1973.
Assimilation efficiency = 70%
| wet season | .6320292E+00 | g C / m2/ y |
| dry season | .5062003E+00 | g C / m2/ y |
Egestion has been calculated using the other parameters : E=C-P-R
| wet season | .1462708E+00 | g C / m2/ y |
| dry season | .1297931E+00 | g C / m2/ y |
| seagrass | 40% |
| epiphytes | 5% |
| detrivorous amphipodss | 3% |
| herbivorous amphipods | 7% |
| bivalves | 5% |
| detritivorous crabs | 5% |
| detritivorous polychaetes | 2% |
| predatory polychaetes | 3% |
| benthic POC | 30% |
Williams 1984, Venier 1997, NC network.