Length-weight relationship in ten fish species from the Nhamundá River, the Amazon Basin, Brazil

FREITAS¹*, Tiago Magalhães da Silva; SOUZA¹, Joao Batista de Souza e; PRUDENTE², Bruno da Silveira; MONTAG², Luciano Fogaça de Assis

doi:10.1590/1809-4392201601272

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Brief report • Acta Amaz. 47 (1) • Jan-Mar 2017 • https://doi.org/10.1590/1809-4392201601272 copy

Length-weight relationship in ten fish species from the Nhamundá River, the Amazon Basin, Brazil

Relação peso-comprimento de dez espécies de peixes do Rio Nhamundá, Bacia Amazônica, Brasil

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Studies on the length-weight relationship (LWR) of fishes are an important tool to describe several biological aspects of the species. Consequently, these studies are relevant due the necessity of comprehension about fish life cycle. Thus, this study aimed to establish the length-weight relationship of the ten most common fish in the Lower Nhamundá River, left tributary of the Amazon River. The capture of fish was conducted in January 2008 using gill nets. A total of 807 individuals, ten species and three Orders (Characiformes, Siluriformes and Clupeiformes) were analyzed. The parameter b varied from 2.680 to 3.698. The LWR were shown for the first time for two species: Anostomoides laticeps and Ageneiosus polystictus. Finally, this research emphasizes the importance of LWR studies in the Amazon and the use of primary data for fisheries management plans.

Keywords:
growth pattern; alometry; fish; Amazonia

ORDER/Famíly/Species	N	Lenght range (cm)	Weight range (g)	Estimated parameters		R²	Published values		Source
ORDER/Famíly/Species	N	Lenght range (cm)	Weight range (g)	a (95% CL)	b (95% CL)	R²	a	b	Source
CHARACIFORMES
Acestrorhynchydae
Acestrorhynchus microlepis (Jardine 1841)	43	11.5-21.5	22-117	0.008 (0.0012-0.0141)	3.121 (2.837-3.405)	0.941	0.0071-0.0255	2.66-3.37	Freitas et al. (2014) Froese and Pauly (2016) Giarizzo et al. (2011; 2015)
Anostomidae
Anostomoides laticeps (Eigenmann 1912)	29	19-25	118-275	0.061 (0.0213-0.1369)	2.680 (2.185-3.175)	0.912	0.0060-0.0288	2.84-3.22	Froese and Pauly (2016)
Ctenolucidae
Boulengerella maculata (Valenciennes 1850)	39	24.5-38.5	83-410	0.001 (0.0008-0.0012)	3.698 (3.341-4.043)	0.950	0.0005-0.0012	3.36-3.61	Giarizzo et al. (2011)
Hemiodontidae
Hemiodus immaculatus Kner 1858	278	13-23	32-183	0.012 (0.0081-0.0159)	3.140 (2.047-3.223)	0.938	0.0016-0.0033	3.32-3.56	Giarizzo et al. (2011)
Triportheidae
Agoniates halecinus Müller and Troschel 1845	147	13.5-20.5	22-90	0.018 (0.0101-0.0259)	2.730 (2.570-2.890)	0.907	0.0024-0.0411	2.81-3.27	Froese and Pauly (2016) Giarizzo et al. (2015)
Triportheus albus Cope 1872	81	13-18	32-74	0.031 (0.0171-0.0489)	2.690 (2.502-2.878)	0.900	0.0049-0.0532	2.46-3.22	Freitas et al. (2014) Froese and Pauly (2016) Giarizzo et al. (2015)
SILURIFORMES
Auchenipteridae
Ageneiosus polystictus Steindachner 1915	20	19-44	107-1235	0.011 (0.0046-0.0184)	3.072 (2.895-3.249)	0.987	0.0020-0.0118	2.92-3.36	Froese and Pauly (2016)
Auchenipterichthys longimanus (Günther 1864)	104	8.5-16.5	14-97	0.013 (0.0070-0.0200)	3.210 (3.019-3.404)	0.924	0.0024-0.0420	2.47-3.22	Giarizzo et al. (2011) Freitas et al. (2014)
Auchenipterus nuchalis (Spix and Agassiz 1829)	51	10.5-18.5	19-75	0.034 (0.0199-0.0491)	2.661 (2.500-2.823)	0.949	0.0032-0.0149	2.72-3.32	Froese and Pauly (2016) Giarizzo et al. (2015)
CLUPEIFORMES
Pristigasteridae
Ilisha amazonica (Miranda Ribeiro 1920)	15	14.5-18	41-76	0.037 (0.0083-0.0927)	2.622 (2.086-3.159)	0.888	0.0253-0.0481	2.39-3.24	Froese and Pauly (2016) Giarizzo et al. (2011)

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[1] * Corresponding author: freitastms@gmail.com