Biometría de invertebrados de ríos de llanura: desentrañando su bionomía.

Zilli, Florencia; Barco, Julia del; Vanzetti, Agustín

Florencia Zilli

Laboratorio de Bentos, Instituto Nacional de Limnología, Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional del Litoral (INALI-CONICET-UNL); Ciudad Universitaria s/n, Santa Fe (3000), Argentina. (florzeta1979@yahoo.com.ar)

Julia del Barco

Laboratorio de Bentos, Instituto Nacional de Limnología, Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional del Litoral (INALI-CONICET-UNL); Ciudad Universitaria s/n, Santa Fe (3000), Argentina. (florzeta1979@yahoo.com.ar)

Agustín Vanzetti

Laboratorio de Bentos, Instituto Nacional de Limnología, Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional del Litoral (INALI-CONICET-UNL); Ciudad Universitaria s/n, Santa Fe (3000), Argentina. (florzeta1979@yahoo.com.ar)

Taxa; abreviations	Habitat	Description of linear metrics measured
Hirudinea (Leeches); Hir	Associated both, to macrophytes and benthos	Body contraction due to fixation may conduct to highly biased measurements Thus, lineal measurements were not included in this study
Oligochaeta (Aquatic worms); Oli Opistocystidae ( Opistocysta spp. and Trieminentia corderoi Harman, 1969); Op Tubificininae ( Aulodrilus pigueti Kowalewski, 1914; Ap, Limnodrilus spp.; Lim)	Associated to macrophytes, but mainly to benthos	L: Total length measured from the anterior edge of the prostomium to the posterior edge of the last segment W: average of 3 measurements made in the first, mid and last segments, perpendicularly to the main body axis
Bivalvia (Clams); Biv Corbiculidae (mainly the non-native Corbicula fluminea Müller, 1774); Cor	Infaunal benthic clams	L: in a lateral view, measured from the anterior to the posterior border of the shell H: in a lateral view, from the top of umbo to the ventral border of the shell. W: in a dorsal view, measured perpendicularly to H in the wider section of each specimen
Sphaeriidae (mainly Musculium spp. and Pisidium spp.); Sph	Associated to macrophytes, but mainly to benthos
Hyriidae ( Castalia ambigua Lamarck 1819 and Diplodon spp., mainly D. parallelopipedon Lea, 1834); Hyr	Infaunal benthic clams
Gastropoda; Gas Ampullaridae (Apple snails, mainly Pomacea canaliculata Lamarck 1828, and Asolene spp.); Amp	Benthic, but mainly associated to macrophytes Amphibious	H= from the tip of the apex to the further border of the outer lip. D1: In a ventral view, measured at the wider section of the body whorl D2: measured, in a 90° angle to D1.
Planorbidae (Ramshorn snails, Biomphalaria spp., Drepanotrema spp.); Pla	Benthic, but mainly associated to macrophytes Amphibious	D: in a lateral view, measured across the wider section
Ephemeroptera (Mayflies); Eph Polymitarcidae, mainly Campsurus violaceus Needham & Murphy, 1924	Nymphs mainly from benthos, but also from pleuston	L: from the anterior edge of the head to the posterior edge of the last abdominal tergite Tibia: measured in the fore leg tibia from the articulation with the femur to the end of the tibia projection. Interoc: in a dorsal view of the head, measured from eye to eye
Chironomidae (Midges); Ch Chironominae: Chironomus spp., Cladopelma spp., Saetheria spp., Harnischia spp.; Chir	Aquatic larvae inhabiting benthos and pleuston	L: in a dorsal view, measured across the body from the tip of the labrum to the end of the last abdominal segment cW: measured perpendicularly to L at the maximum width of the cephalic capsule
Tanypodinae: Coelotanypus spp., Ablabesmyia spp., Tanypus spp.; Tany	Aquatic larvae inhabiting benthos and pleuston

Taxa	x-y measurements used in the calculations (Log₁₀ )	Regression constants
		log10a	b	p	R²	n	Metric range (mm)
Limnodrilus spp.	L-DW	0.62±0.05	0.65±0.04	***	0.916	25	2.70-33.58
	W-DW	-0.23±0.02	3.83±0.21	***	0.890	41	0.11-0.58
Aulodrilus pigueti	L-DW	-0.04±0.01	0.08±0.02	***	0.550	25	2.30-11.00
	W-DW	-0.02±0.01	0.75±0.15	***	0.488	29	0.13-0.35
Opistocystidae	L-DW	-0.10±0.04	0.20±0.04	***	0.570	19	4.04-10.05
	W-DW	-0.10±0.05	1.63±0.47	**	0.506	17	0.20-0.34
Oligochaetes combined	L-DW	-0.30±0.03	0.39±0.03	***	0.728	69	2.30-33.58
	W-DW	-0.18±0.02	2.93±0.23	***	0.662	87	0.11-0.58
Corbiculidae	L-DW	-1.18±0.06	3.54±0.06	***	0.989	40	8.28-14.66
	L-DWSoft	-2.03± 0.09	2.90±0.08	***	0.970	42	8.28-14.66
	H-DW	-0.88±0.05	3.34±0.05	***	0.993	41	7.51-14.35
	H-DWSoft	-1.76± 0.10	2.72±0.10	***	0.948	43	7.51-14.35
	W-DW	-0.74±0.06	3.65±0.06	***	0.989	40	5.49-10.24
	W-DWSoft	-1.64± 0.09	2.97±0.10	***	0.955	43	5.49-10.24
Hyriidae	L-DW	0.42±0.41	2.15±0.23	***	0.905	11	23.75-93.96
	L-DWSoft	0.58±0.42	2.04±0.24	***	0.890	11	23.75-93.96
	H-DW	0.30±0.53	2.58±0.36	***	0.854	11	16.01-57.29
	H-DWSoft	0.39±0.47	2.50±0.32	***	0.873	11	16.01-57.29
	W-DW	0.16±0.66	2.98±0.49	***	0.802	11	11.01-38.99
	W-DWSoft	0.24±0.60	2.89±0.45	***	0.824	11	11.01-38.99
Sphaeriidae^*1	L-DW	-0.28±0.11	0.90±0.18	***	0.480	29	1.83-5.11
	H-DW	-0.36±0.11	1.21±0.21	***	0.542	29	1.20-3.88
Bivalves combined^*2	L-DW	0.11±0.06	2.34±0.05	***	0.981	51	8.28-93.96
	L-DWSoft	-3.43±0.15	4.26±0.12	***	0.959	53	8.28-93.96
	H-DW	-0.86±0.09	3.33±0.08	***	0.975	51	7.51-57.29
	H-DWSoft	-4.95±0.30	5.85±0.26	***	0.907	54	7.51-57.29
	W-DW	-0.65±0.80	3.56±0.08	***	0.975	51	3.18-38.99
	W-DWSoft	-4.65±0.26	6.33±0.25	***	0.925	54	4.12-38.99
Ampullariidae	H-DW	-1.01 ± 0.10	2.96±0.08	***	0.952	69	1.55-84.73
	H-DWSoft	-1.76±0.20	3.02±0.15	***	0.949	24	6.65-84.73
	D1-DW	0.59±0.09	2.82±0.08	***	0.947	69	1.47-78.02
	D1-DWSoft	-1.39±0.20	2.92±0.15	***	0.942	24	5.39-78.02
	D2-DW	-0.71±0.08	3.05±0.07	***	0.963	69	1.30-59.45
	D2-DWSoft	-1.54±0.16	3.18±0.13	***	0.963	24	4.7-59.45
Planorbidae	D-DW	-1.11±0.07	2.84±0.14	***	0.912	44	1.53-3.33
Gastropoda combined	D*³-DW	-1.18±0.06	3.28±0.06	***	0.965	113	1.41-78.02
Ephemeroptera	L-DW	-0.27±0.007	0.53±0.01	***	0.908	503	1.48-19
	Interoc-DW	-0.11±0.005	2.78±0.05	***	0.853	474	0.07-0.55
	Tibia-DW	-0.12±0.005	1.33±0.02	***	0.879	474	0.16-1.63
Chironomidae
Coelotanypus spp.	L-DW	-0.43±0.07	0.61±0.08	***	0.772	20	4.08-9.13
Tanypodinae combined	L-DW	-0.20±0.03	0.33±0.04	***	0.557	56	1.6-9.88
	cW-DW	-0.11±0.03	1.01±0.21	***	0.352	46	0.23-0.73
Chironominae combined	L-DW	-0.37± 0.07	0.57±0.09	***	0.557	33	2.05-21.75
	cW-DW	-0.14±0.05	1.84±0.40	***	0.416	32	0.11-0.78
Chironomidae combined	L-DW	-0.31±0.04	0.48±0.05	***	0.521	89	1.6-21.75
	cW-DW	-0.10±0.03	1.14±0.22	***	0.267	78	0.11-0.73
Insects combined	L-DW	-0.28±0.008	0.53±0.01	***	0.817	592	1.48-21.75
	Width^*4-DW	-0.04±0.009	1.69±0.09	***	0.410	552	0.07-0.73
Invertebrates combined	L-DW	-1.70±0.09	2.55±0.10	***	0.477	775	0.39-93.96

Taxa	x-y measurements used in the calculations (Log₁₀ )	Regression constants		p	R²	n	Metric range (mm)
		log10a	b
Limnodrilus spp.	L-W	-0.01±0.01	0.10±0.01	***	0.561	53	2.70-33.58
Oligochaetes combined	L-W	0.04±0.01	0.06±0.01	***	0.228	85	2.30-33.58
Corbiculidae	L-H	-0.098±0.02	1.07 ± 0.02	***	0.982	42	6.33-14.66
	L-W	-0.12±0.02	0.97±0.02	***	0.988	42	6.33-14.66
	H-W	-0.04±0.02	0.91±0.02	***	0.989	43	5.50-14.35
Hyriidae	L-H	0.33±0.26	0.67±0.15	**	0.682	11	23.75-93.96
	L-W	0.47±0.27	0.50±0.15	**	0.545	11	23.75-93.96
	H-W	0.14±0.12	0.81±0.08	***	0.922	11	16.01-57.29
Sphaeriidae	L-H	0.03±0.04	0.80±0.07	***	0.84	30	1.83-5.11
Bivalves combined	L-H	0.03±0.02	0.89±0.02	***	0.949	83	1.83-93.96
	L-W	0.23±0.03	0.64±0.02	***	0.932	53	6.33-93.96
	H-W	-0.05±0.02	0.93±0.01	***	0.987	54	1.20-57.29
Ampullariidae	H-D1	-0.07±0.01	0.99±0.01	***	0.991	83	1.55-84.73
	H-D2	-0.07±0.01	0.95±0.01	***	0.993	83	1.55-84.73
	D1-D2	0.01±0.01	0.96±0.01	***	0.993	83	1.47-78.02
Ephemeroptera	L-Tibia	-0.09±0.004	0.37±0.005	***	0.932	474	1.48-16.88
	L-Interoc	-0.04±0.002	0.16±0.002	***	0.907	474	1.48-16.88
	Tibia-Interoc	-0.0001±0.0007	0.46±0.003	***	0.977	474	0-16-1.63
Tanypodinae	L-cW	0.05±0.03	0.16±0.04	***	0.239	52	1.60-9.88
Chironominae	L-W	-0.07±0.02	0.24± 0.02	***	0.76	32	2.05-21.75
Chironomidae combined	L-W	-0.01± 0.02	0.21± 0.03	***	0.371	84	1.6-21.75
Insects combined	L-Width^*1	-0.03±0.005	0.17±0.006	***	0.569	558	1.48-21.75

	Mean	±SE	N
Sph DW/WW	0.45	0.07	5 pools of ≈110 individuals each
Sph AFDW/DW	0.82	0.03	"
Sph H/L	0.753	0.01	31
Sph DW/L (mg/mm)	0.302	0.03	32
Cor DW/WW	0.69	0.002	40
Cor Soft DW/WW	0.17	0.004	44
Cor Soft AFDW/DW	0.89	0.005	3 pools of ≈32 individuals each
Cor Shell AFDW/DW	0.03	0.003	4 pools of ≈53 valves each
Cor DW Soft/all	0.03	0.0005	41
Cor DW Soft/Shell	0.03	0.0005	"
Cor DW Soft/L (mg/mm)	1.065	0.06	45
Cor W/L	0.671	0.003	44
Cor H/L	0.939	0.004	"
Cor W/H	0.715	0.002	45
Hyr DW/WW	0.66	0.04	11
Hyr Soft DW/WW	0.76	0.01	"
Hyr Soft AFDW/DW	0.89	0.01	7
Hyr Shell AFDW/DW	0.05	0.00	"
Hyr DW Soft/all	0.92	0.03	"
Hyr DW Soft/L (mg/mm)	287.0	51.18	11
Hyr W/L	0.4	0.05	"
Hyr H/L	0.6	0.05	"
Hyr W/H	0.7	0.03	"
Amp DW/WW	0.42	0.01	69
Amp Soft DW/WW	0.31	0.02	4
Amp Soft AFDW/DW	0.89	0.02	"
Amp Soft AFDW/WW	0.27	0.02	"
Amp Shell AFDW/DW	0.05	0.01	3
Amp DW Soft/all	0.22	0.01	24
Amp DW/H	65.01	18.27	67
Amp D1/D2	1.13	0.01	83
Amp H/D1	1.24	0.01	"
Amp H/D2	1.40	0.01	"
Pla DW/WW	0.32	0.01	48
Pla AFDW/DW	0.27	x	2
Plano DW/D	0.50	0.05	48
Ch DW/WW	0.47	0.17	3 pools of ≈68 individuals each
Ch AFDW/DW	0.63	0.10	"
Tany ccW/L	0.09	0.01	56
Tany DW/L	0.02	0.003	"
Chir ccW/L	0.06	0.003	31
Chir DW/L	0.01	0.002	30
Eph DW/WW	0.49	x	2 pools of ≈19 individuals each
Eph AFDW/DW	0.83	0.03	"
Eph DW/L	0.161	0.004	503
Eph Tibia/L	0.243	0.002	474
Eph interoc/L	0.113	0.001	"
Hir DW/WW	0.42	0.07	7 pools of ≈41 individuals each
Hir AFDW/DW	0.96	0.01	"
Oli DW/WW	0.50	0.05	13 pools of ≈163 individuals each
Oli AFDW/DW	0.79	0.02	"
Ap W/L	0.03	0.002	33
Ap DW/L	0.01	0.001	34
Op W/L	0.04	0.004	21
Op DW/L	0.03	0.002	"
Lim W/L	0.02	0.001	52
Lim DW/L	0.02	0.002	51

[TFN1] *1 Soft tissues and valves weren’t separated

[TFN2] *2 Regressions were calculating by pooling data from Hyriidae and Corbiculidae

[TFN3] *3 D refers to D1 for Ampullaridae.

[TFN4] *4 Width represented by cW for midges and Interoc for mayflies

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Biometría de invertebrados de ríos de llanura: desentrañando su bionomía.

RESUMEN