Length-weight relationships (LWRs) were estimated for 16 ornamental fish species from Aman\u00e3 Lake and nine tributary streams, in Central Brazilian Amazonia. Sampling was carried out bimonthly for a year (2007\u20132008), using two sets of four gillnets (20 m \u00d7 2 m, 2,5; 3,5; 04; 4,5 cm stretch mesh size); trawls were performed with seine nets (35 m \u00d7 6 m, 3 mm stretch mesh size); native fish-traps (fyke-net Morphometric parameters, such as the length\u2013weight relation (LWR), is usually the first step in obtaining estimates of population growth for fish communities, and form a key element in fish biology and ecology research, potentiating is species biomass estimations from length observations (Froese et al., 2011). The relationship between these two variables generates information contributing to the development of fish population and dynamics models (Froese, 2006), can reveal biogeographical relationships, as well as provide baseline information for fish stock management strategies and conservation (Barros et al., 2018; Camargo et al., 2018; Froese et al., 2011; Silva et al., 2019). This paper describes the length-weight relationships (LWR) for 16 ornamental fish species from the Aman\u00e3 Sustainable Development Reserve (ASDR), sampled at Aman\u00e3 lake, in Central Brazilian Amazonia, and of its nine tributary streams. The study were carried out as part of a larger research project, conducted by the Mamiraua Institute, to support the sustainable management of ornamental fish in the area by the local traditional fishing communities.<\/p>\n\n\n\n Sampling was carried out bimonthly between February 2007 and February 2008, at Aman\u00e3 Lake and nine tributary streams (02\u00ba 37\u2019 07\u201d \/ 64\u00ba 38\u2019 47\u201d), all lying within Aman\u00e3 Sustainable Development Reserve (ASDR), Amazonas State, Brazil. Sampling was conducted using two sets of four gillnets (20 m \u00d7 2 m, 2,5; 3,5; 04; 4,5 cm stretch mesh size) immersed in water for 24-hr with 3-hr interval between catches; five trawls were performed with seine nets (35 m \u00d7 6 m, 3 mm stretch mesh size); five woven native fish-traps Acesse o artigo completo gratuitamente:<\/p>\n\n\n\n Abstract Length-weight relationships (LWRs) were estimated for 16 ornamental fish species from Aman\u00e3 Lake and nine tributary streams, in Central Brazilian Amazonia. Sampling was carried out bimonthly for a year (2007\u20132008), using two sets of four gillnets (20 m \u00d7 2 m, 2,5; 3,5; 04; 4,5 cm stretch mesh size); trawls were performed with seine […]<\/p>\n","protected":false},"author":81,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_ppma_block_editor_authors":"","_links_to":"","_links_to_target":""},"categories":[353],"tags":[],"ppma_author":[1282],"class_list":["post-7980","post","type-post","status-publish","format-standard","hentry","category-artigos"],"acf":[],"yoast_head":"\n
like fish-traps woven from local lianas), and dip nets (0.5 m \u00d7 0.5 m stretch mesh size). Measurements were done for standard length (SL \u20130.1 cm precision) and total weight (Wt \u20130.01 g precision). This study provides information on the length\u2013weight relationships for all sampled species and, in addition, provides new maximum standard lengths for six species.
KEYWORDS:<\/strong> allometry, Amazon fishes, Middle Solim\u00f5es Basin, neotropical fish fauna<\/p>\n\n\n\nINTRODUCTION<\/h2>\n\n\n\n
MATERIALS AND METHODS<\/h2>\n\n\n\n
(fyke-net like fish-traps woven from local lianas) immersed in water for 24-hr, and two hundred trawls were performed with dip nets (0.5 m \u00d7 0.5 m stretch mesh size). Collected fish were anesthetized, fixed in 10% formalin and preserved in 70% ethanol after a 10-day- period. Fish specimens were later identified to the species level by consulting the literature (e.g. Barata & Lazzarotto, 2008; Gery, 1977) and specialists. All scientific names, authority and year of description followed Eschmeyer et al. (2020), and all species relationships were checked using Fishbase (Froese & Pauly, 2020).<\/p>\n\n\n\n