Influence of a new fishpond design on invertebrate community biodiversity and secondary production

Open Access

Table 3

Benthic macroinvertebrate and zooplankton community mean (across replicates) quantitative metrics ± 1 standard error (SE). N is the mean density per sampling date expressed in individuals per m²; B is the mean community biomass per sampling date expressed in mg of dry mass per m²; P is the annual secondary production g.m⁻².y⁻¹ ; P:B is the turnover ratio of biomass per year; and B:N is the mean individual dry mass expressed in μg.

Pond type	Mean density ± SE (ind m⁻²)	Mean B ± SE (mg.m⁻²)	Mean P_year ± SE (g.m⁻².y⁻¹)	Mean P:B ratio ± SE (y⁻¹)	Mean B:density ratio ± SE (μg)
Benthic macroinvertebrates
EXT	2313 ± 283	228 ± 26^a	3.6 ± 0.1^a	16.1 ± 1.6^b	98.736 ± 0.946^a
SI	3373 ± 329	478 ± 106^a	5.6 ± 0.66^ab	12.1 ± 1.3^ab	139.994 ± 17.799^a
CSIF	3289 ± 1590	245 ± 54^a	3.4 ± 1.2^a	13.6 ± 1.8^ab	86.640 ± 25.450^a
LAG	6694 ± 847	1920 ± 290^b	14.5 ± 2^b	7.5 ± 0.1^a	285.889 ± 7.189^b
Zooplankton
EXT	2.40 ± 0.10 × 10⁶	559 ± 19^b	49 ± 0.84^c	88 ± 4.4	0.233 ± 0.002^bc
SI	2.35 ± 0.82 × 10⁶	272 ± 2^ab	20.87 ± 1.18^b	76.6 ± 3.8	0.132 ± 0.047^ab
CSIF	0.95 ± 0.39 × 10⁶	60 ± 33^a	3.7 ± 1.3^a	70.4 ± 16.7	0.060 ± 0.010^a
LAG	0.52 ± 0.11 × 10⁶	379 ± 128^ab	19.3 ± 1.5^b	55.8 ± 14.9	0.710 ± 0.095^c

EXT: extensive fishpond; SI: semi-intensive fishpond; CSIF: coupled semi-intensive fishpond; LAG: lagoon

Letter groups indicate significant differences between designs (ANOVA, p ˂ 0.05).

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