Length-weight relationship of 32 fish species from oligotrophic headwater streams of northwestern Colombian Amazon

LUQUE, Francisco Javier; COLORADO Z., Gabriel J.

doi:10.1590/1809-4392202401512

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ANIMAL AND FISHERIES SCIENCE | SHORT COMMUNICATION • Acta Amaz. 54 (4) • 2024 • https://doi.org/10.1590/1809-4392202401512 linkcopy

Length-weight relationship of 32 fish species from oligotrophic headwater streams of northwestern Colombian Amazon

Relación longitud-peso de 32 especies de peces de arroyos de cabecera oligotróficos del noroeste de la Amazonia Colombiana

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

This study examines the length-weight relationships (LWR) for 32 freshwater fish species sampled in five oligotrophic headwater streams in northwestern Amazonia, Department of Guaviare, Colombia. Fish were sampled between August 2021 and February 2022 using gillnets, hand nets, and seine net. Total weight and standard length were measured to calculate LWR. Allometric coefficient b ranged from 2.67 to 3.43. The study includes two new reports and is the first time LWRs are presented for this region.

KEYWORDS:
allometry; growth patterns; fish; fisheries; reproduction

Sampling Station	Reach	Geographical coordinates
		N	W
Yamu	Upper	2°27’13.70”	72°45’17.80”
	Middle	2°27’25.90”	72°42’40.30”
	Lower	2°35’26.70”	72°50’34.20”
Retiro	Upper	2°31’32.70”	72°42’48.80”
	Middle	2°30’29.00”	72°43’5.00”
	Lower	2°33’13.10”	72°42’44.90”
Lindosa	Upper	2°29’21.71”	72°39’37.92”
	Middle	2°29’45.60”	72°39’2.20”
	Lower	2°30’26.40”	72°38’27.10”
Aguabonita	Upper	2°31’25.80”	72°37’7.50”
	Middle	2°32’55.00”	72°36’57.30”
	Lower	2°34’45.50”	72°36’4.90”
Cristalina	Upper	2°33’15.50”	72°43’56.60”
	Middle	2°32’58.10”	72°44’21.70”
	Lower	2°32’47.80”	72°45’10.70”

Order/Family/Species	N	SL range (cm)	W range (g)	a	95% CI of a	b	95% CI of b	r2
Characiformes
Acestrorhynchidae
Acestrorhynchus falcatus (Bloch, 1794)	12	6.4 - 25.2	2.7 - 150.6	0.011	0.004 - 0.027	3.03	2.71 - 3.35	0.97
Bryconidae
Brycon whitei (Myers & Weitzman, 1960)	25	10.4 - 25.5	13.7 - 198.5	0.002	0.0008 - 0.005	3.33	3.40 - 4.06	0.95
Characidae
Aphyocharax alburnus (Günther, 1869)	30	2.2 - 7.9	0.1 - 5.4	0.021	0.014 - 0.027	2.81	2.57 - 3.02	0.96
Astyanax interger (Myers, 1930)	108	2.4 - 13.4	0.3 - 83.3	0.018	0.013 - 0.025	3.16	3.01 - 3.33	0.96
Astyanax bimaculatus (Linnaeus, 1758)	110	2.6 - 5.1	0.3 - 2.6	0.014	0.009 - 0.0220	3.21	2.87 - 3.53	0.98
Charax metae (Eigenmann, 1922)	32	2.6 - 6.5	0.3 - 5.8	0.011	0.008 - 0.017	3.25	3.02 - 3.49	0.98
Creagrutus calai (Vari & harold, 2001)	80	2.3 - 6.1	0.2 - 3.8	0.017	0.012 - 0.025	3.04	2.80 - 3.27	0.96
Hemmigramus barrigonae (Eigenmann & Henn, 1914)	111	2.1 - 4.7	0.1 - 3.1	0.013	0.008 - 0.023	3.36	2.91 - 3.81	0.96
Hyphessobrycon acaciae (García-Alzate, Román-Valencia & Prada-Pedreros, 2010)	101	2.2 - 3.5	0.2 - 1.3	0.009	0.002 - 0.033	3.26	2.57 - 4.95	0.98
Knodus alpha (Eigenmann, 1914)	16	2.6 - 4.5	0.3 - 1.6	0.022	0.014 - 0.036	2.85	2.47 - 3.24	0.97
Moenkhausia comma (Eigenmann, 1908)	95	4.1 - 8.2	1.7 - 18.5	0.016	0.004 - 0.053	3.37	2.69 - 4.0	0.98
Moenkhausia mikia (Marinho & Langeani, 2010)	52	2.6 - 6.6	0.3 - 5.9	0.018	0.014 - 0.023	3.07	2.91 - 3.24	0.98
Moenkhausia oligolepis (Günther, 1864)	92	2.1 - 7.2	0.2 - 12.1	0.024	0.020 - 0.029	3.13	3.01 - 3.25	0.99
Crenuchidae
Characidium zebra (Eigenmann, 1909)	82	2 - 5.2	0.2 - 1.9	0.025	0.013 - 0.047	2.82	2.06 - 3.17	0.95
Curimatidae
Steindachnerina argentea (Gill, 1858)	15	8.9 - 14.9	23.7 - 137.7	0.012	0.004 - 0.034	3.43	2.99 - 3.87	0.98
Erythrinidae
Hoplerythrinus unitaeniatus (Spix & Agassiz, 1829)	10	9.9 - 20.5	19.5 - 146.3	0.042	0.021 - 0.085	2.89	2.43 - 2.94	0.99
Hoplias malabaricus (Bloch, 1794)	26	3.1 - 24.5	0.5 - 235.2	0.021	0.016 - 0.028	2.91	2.78 - 3.02	0.99
Iguanodectidae
Bryconops giacopinii (Fernández-Yépez, 1950)	163	2.3 - 9.8	0.1 - 19.1	0.011	0.010 - 0.013	3.23	3.13 - 3.32	0.96
Lebiasinidae
Copella arnoldi (Regan, 1912)	92	2.2 - 4.8	0.1 - 1.9	0.017	0.013 - 0.022	2.86	2.63 - 3.09	0.97
Pyrrhulina lugubris (Eigenmann, 1922)	37	2.1 - 4.7	0.2 - 2.2	0.019	0.014 - 0.025	2.98	2.75 - 3.21	0.95
Prochilodontidae
Prochilodus mariae (Eigenmann, 1922)	11	3.4 - 14.3	1.2 - 19.5	0.079	0.018 - 0.329	2.79	1.72 - 3.06	0.89
Cichliformes
Cichlidae
Aequidens tetramerus (Heckel, 1840)	28	4.1 - 15.2	2.9 - 102.1	0.088	0.045 - 0.169	2.74	2.44 - 3.04	0.95
Bujurquina mariae (Eigenmann, 1922)	26	2 - 11.1	0.6 - 73.1	0.065	0.043 - 0.097	2.8	2.57 - 3.03	0.97
Crenicichla alta (Eigenmann, 1912)	25	3.2 - 13.7	0.4 - 55.6	0.007	0.005 - 0.010	3.42	3.27 - 3.58	0.99
Satanoperca mapiritensis (Fernández-Yépez, 950)	27	2.4 - 13.8	0.5 -99.6	0.033	0.029 - 0.038	3.01	2.95 - 3.07	0.97
Cyprinodontiformes
Rivulidae
Anoblepsoides sp1.	60	2.5 - 6.7	0.4 - 3.2	0.047	0.036 - 0.061	2.67	1.98 - 2.33	0.95
Siluriformes
Auchenipteridae
Duringlanis romani (Mees, 1988)	18	2.1 - 3.3	0.2 - 1.3	0.046	0.027 - 0.078	2.76	2.66 - 3.18	0.95
Callichthyidae
Corydoras melini (Lönnberg & Rendhal, 1930)	28	1.9 - 5.2	0.2 - 5.8	0.041	0.017 - 0.093	3.07	2.46 - 3.69	0.95
Loricariidae
Ancistrus triradiatus (Eigenmann, 1918)	27	2.8 - 7.5	0.4 - 12.9	0.021	0.014 - 0.031	3.04	2.81 - 3.27	0.97
Rineloricaria eigenmanni (Pellegrin, 1908)	27	3.8 - 11.1	0.3 - 8.5	0.005	0.001 - 0.020	2.93	2.30 - 3.56	0.96
Heptateridae
Pimelodella metae (Eigenmann, 1917)	15	3.4 - 8.4	0.6 - 7.6	0.014	0.004 - 0.043	2.9	2.21 - 3.58	0.98
Trichomyceridae
Ituglanis metae (Eigenmann, 1917)	27	3.1 - 6.9	0.4 - 2.9	0.032	0.015 - 0.068	2.85	1.83 - .87	0.96

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[TFN1] N= sample size, SL = standard length, W = total weight, a = linear coefficient, b = allometric coefficient, r² = coefficient of determination.