QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

This Article Summary Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Related articles in JEB Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Sanford, C. P. J. Articles by Wainwright, P. C. Search for Related Content PubMed PubMed Citation Articles by Sanford, C. P. J. Articles by Wainwright, P. C. Social Bookmarking                         What's this?

Use of sonomicrometry demonstrates the link between prey capture kinematics and suction pressure in largemouth bass

Christopher P. J. Sanford^1,* and Peter C. Wainwright²

¹ Department of Biology, 114 Hofstra University, Hempstead, NY 11549, USA
² Section of Evolution and Ecology, University of California, Davis, CA 95616, USA

View larger version (27K): [in a new window]   Fig. 1. Schematic view of (A) the lateral head region, and (B) a transverse section through the buccal cavity of the largemouth bass Micropterus salmoides to show the placement of sonomicrometric crystals. Crystals are indicated as black dots. See text for discussion of exact locations.

View larger version (23K): [in a new window]   Fig. 2. (A) Representative kinematic profile of buccal cavity variables and pressure during suction feeding in Micropterus salmoides to show the overall pattern and preparatory phase (see text). Post, posterior; Ant., anterior. (B) Buccal cavity area plotted against time for the same sequence as in A. Time zero (t0) represents the time of peak subambient pressure.

View larger version (25K): [in a new window]   Fig. 3. (A) Representative kinematic profile of buccal cavity variables and pressure to show the details of the expansion phase during suction feeding in Micropterus salmoides. Post., posterior; Ant., anterior. (B) Buccal cavity area plotted against time for the same sequence as in A. (C) Rate of change in buccal area for the same sequence as in A. (D) Rate of change in buccal area divided by buccal area for the same sequence as in A. Time zero (t0, solid vertical line) represents the time of peak subambient pressure. Note the very early time of peak subambient pressure.

View larger version (19K): [in a new window]   Fig. 4. Bar plot of the mean onset and peak times of variables used in this study. Values are means ± 1 S.E.M. Time zero (t0, solid vertical line) represents the time of peak subambient pressure. The vertical dashed line represents the average time of prey capture (i.e. the time that the prey crosses the plane of the gape: 28.83±2.89 ms; mean ± S.D.), using data from Svanbäck et al. (2002) with similar sized bass. Post., posterior; Ant., anterior.

View larger version (22K): [in a new window]   Fig. 5. Typical feeding sequence showing the displacement of the hyoid relative to a fixed neurocranium (top axis). Also indicated are the peak times of all the buccal cavity variables measured in this study. The position of the hyoid was calculated using the distance between crystals 1, 2 and 5 (see Fig. 1). Note the early time of peak subambient pressure (red triangle) relative to kinematic variables. Also note the high velocity at the early stages of depression, as indicated by the spacing between successive points (2 ms intervals).

View larger version (18K): [in a new window]   Fig. 6. Log10/log10 bivariate scatterplots with regression lines of correlations between kinematic variables and pressure variables to show (A) and (B) significant main effects with approximately parallel (homogenous) slopes; and (C) a significant interaction effect with regression lines that diverge from one another. Regression equations: (A) individual 1, y=-0.29x+1.88, r2=0.55; individual 2, y=-0.12x+1.50, r2=0.30; individual 3, y=-0.17x+1.64, r2=0.67; individual 4, y=-0.80x+3.31, r2=0.65; individual 5, y=-0.41x+2.22, r2=0.41; (B) individual 1, y=0.88x-0.07, r2=0.62; individual 2, y=0.66x+0.34, r2=0.26; individual 3, y=0.84x-0.35, r2=0.87; individual 4, y=1.74x-2.32, r2=0.62, individual 5, y=0.91x-0.05, r2=0.49; (C) individual 1, y=0.81x-0.55, r2=0.63; individual 2, y=-1.52x-2.80, r2=0.71; individual 3, y=-2.08x-3.34, r2=0.84; individual 4, y=0.53x-0.22, r2=0.28; individual 5, y=-0.61x-1.47, r2=0.52. See text for explanation.

CiteULike

Complore

Connotea

Del.icio.us

Digg

Reddit

Technorati

Twitter