Henry A. Ruhl. 2007. Abundance and size distribution dynamics of abyssal epibenthic megafauna in the northeast Pacific. Ecology 88:1250–1262.

Appendix A. Supplementary size frequency distributions.

Presented below are the monthly and yearly percent frequency distributions for the top six mobile epibenthic megafauna found at Station M. Yearly plots are provided for the less abundant Synallactes profundi, Scotoplanes globosa, Oneirophanta mutabilis, and Psychropotes longicauda, in part, to illustrate the limits of the distribution data.

In the monthly figures one can track the growth of putative cohorts over time. In examining both the shifts in these peaks and the rates of increase in abundance estimates we can make the best available estimates of growth for presented in the principal text. For instance, in Fig. A1 the peak in June 1991 can be tracked to February 1992 for a 20-mm increase over eight months giving a growth estimate of 2.5 mm/mo.

Body Size (length in mm)

FIG. A1 (continues below). Monthly percent frequency distributions for Elpidia minutissima for October 1989 to February 1995. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A1 (continued). Monthly percent frequency distributions for Elpidia minutissima for March 1995 to December 1998. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A2. Yearly percent frequency distributions for Peniagone diaphana for 1989 to 1998. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A3 (continues below). Monthly percent frequency distributions for Peniagone diaphana for October 1989 to February 1995. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A3 (continued). Monthly percent frequency distributions for Peniagone diaphana for March 1995 to October 2004. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A4. Yearly percent frequency distributions for Peniagone vitrea for 1989 to 2004. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A5 (continues below). Monthly percent frequency distributions for Peniagone vitrea for October 1989 to February 1995.

Body Size (length in mm)

FIG. A5(continued). Monthly percent frequency distributions for Peniagone vitrea for March 1995 to October 2004. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A6. Yearly percent frequency distributions for Abyssocucumis abyssorum for 1989 to 2004. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A7 (continues below). Monthly percent frequency distributions for Abyssocucumis abyssorum for October 1989 to February 1995. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A7 (continued). Monthly percent frequency distributions for Abyssocucumis abyssorum for March 1995 to October 2004. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A8. Yearly percent frequency distributions for Ophiura bathybia for 1989 to 2004. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A9 (continues below). Monthly percent frequency distributions for Ophiura bathybia for October 1989 to February 1995. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A9 (continued). Monthly percent frequency distributions for Ophiura bathybia for March 1995 to October 2004. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A10. Yearly percent frequency distributions for Echinocrepis rostrata for 1989 to 2004. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A11 (continues below). Monthly percent frequency distributions for Echinocrepis rostrata for October 1989 to February 1995. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A11 (continued). Monthly percent frequency distributions for Echinocrepis rostrata for March 1995 to October 2004. Note that the gray bars filed bars have differing scales from black bars.

Body Size (length in mm)

FIG. A12. Yearly percent frequency distributions for Synallactes profundi from 1989–2004.

Body Size (length in mm)

FIG. A13. Yearly percent frequency distributions for Scotoplanes globosa from 1989–2002.

Body Size (length in mm)

FIG. A14. Yearly percent frequency distributions for Oneirophanta mutabilis from 1990–2004.

Body Size (length in mm)

FIG. A15. Yearly percent frequency distributions for Psychropotes longicauda from 1990–2004.