Associations of shrimp with gobies are widespread across the tropics. Most of the work on these goby-shrimp relationships has been done in the Red Sea/Indian Ocean Luther 1958; Magnus 1967; Karplus 1981

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Small Gobies Medium Gobies Large Gobies
No. per plot (mean and S.D. of 18 plots) Total count (18 plots)
Small Med
Source df SS MS F
Table 6.

Table 4. Results from two-way ANOVA of numerical density of gobies (all sizes combined) for exclosure treatment and time.

		Small Gobies		Medium Gobies		Large Gobies
ID#	Treatment	No. per plot (mean and S.D. of 18 plots)	Total count (18 plots)	No. per plot (mean and S.D. of 18 plots)	Total count (18 plots)	No. per plot (mean and S.D. of 18 plots)	Total count (18 plots)	Total of All Sizes combined (mean and S.D.)
0	None	6.28 + 1.41	113	7.56 + 0.98	136	4.11 + 1.02	70	17.94 + 1.55

		Small		Med		Large		Total
2	Full	7.11 + 1.68	128	13.28 + 2.14	239	4.06 + 1.11	73	24.44 + 2.38
2	Part	12.06 + 1.70	199	9.17 + 1.69	181	1.94 + 1.11	31	23.17 + 2.64
2	None	11.06 + 1.47	217	10.06 + 1.86	165	1.72 + 1.13	35	22.83 + 2.01

		Small		Med		Large		Total
3	Full	6.17 + 1.38	111	14.06 + 1.89	253	4.33 + 0.97	78	24.56 + 3.20
3	Part	11.61 + 1.97	215	10.06 + 2.24	185	2.50 + 1.29	37	24.17 + 3.00
3	None	11.94 + 1.26	209	10.28 + 1.96	181	2.06 + 1.00	45	24.28 + 2.37

		Small		Med		Large		Total
4	Full	5.50 + 1.58	99	13.94 + 1.47	251	3.72 + 1.07	67	23.17 + 2.83
4	Part	9.83 + 1.94	182	10.88 + 2.14	198	2.33 + 0.91	38	23.06 + 2.65
4	None	10.11 + 1.67	177	11.00 + 2.03	196	2.11 + 0.83	42	23.22 + 2.73

		Small		Med		Large		Total
5	Full	6.28 + 1.32	113	11.56 + 1.38	208	4.06 + 0.94	73	21.89 + 2.30
5	Part	8.17 + 1.42	151	11.00 + 1.94	202	2.33 + 0.97	35	21.56 + 2.30
5	None	8.39 + 1.50	147	11.22 + 2.16	198	1.94 + 0.87	42	21.56 + 2.94

		Small		Med		Large		Total
6	Full	7.44+ 1.76	134	11.56 + 1.38	208	3.06 + 0.87	55	22.06 + 2.67
6	Part	8.50 + 1.92	148	9.72 + 1.84	201	2.61 + 0.98	43	20.83 + 3.20
6	None	8.22 + 1.44	153	11.17 + 2.07	175	2.39 + 0.92	47	21.78 + 2.65

		Small		Med		Large		Total
7	Full	8.22 + 1.83	148	10.22 + 1.80	184	2.72 + 1.02	49	21.17 + 2.23
7	Part	8.50 + 1.89	147	9.22 + 1.59	181	2.39 + 1.04	49	20.11 + 2.87
7	None	8.17 + 1.65	153	10.06 + 2.01	166	2.72 + 0.89	43	20.94 + 2.35

Table 5. Mean numerical densities of gobies per plot, divided into three size classes, for each of seven data collection dates and three exclosure treatments (full, partial, none). (For ID#s, refer to Table 1.)

Source	df	SS	MS	F	P
Treatment	2	175.44	87.72	76.61	< 0.001
Month	5	12.22	2.04	1.78	0.102
Interaction	12	48.89	4.07	3.56	< 0.001
Error	357	408.78	1.15
Total	377	645.33

Table 6. Results from two-way ANOVA of numerical density of large gobies for exclosure treatment and time.
Appendix A. Mean number (+ S.D.) of large, medium and small gobies (separately) recorded per plot for each of three treatments from February to October 2004. Exclosures were in place and functional just after ID#0 and were taken down immediately after ID#5.

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