This study reports the length‐weight relationships (LWR) for seven endemic fish species from streams in the Ivaí (Characidium heirmostigmata, Corydoras lacrimostigmata, Curculionichthys oliveirai, Hisonotus pachysarkos, and Cambeva horacioi) and Ivaí and Piquiri (Apareiodon vladii and Planaltina kaingang) River basins, Paraná State, Brazil. Fish specimens measured and weighed were collected between November 1994 and July 2019, fixed with 10% formalin, and are preserved in 70% alcohol. Measurements were done for standard length (SL—0.1 cm precision) and total weight (TW—0.01 g precision). All coefficient of allometry obtained is within the general range for fishes representing useful tentatives for LWR parameters. We highlight the importance of information about the biology of the endemic fish species in a crucial area for the biodiversity conservation of the Upper Paraná River system.

中文翻译：

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来自巴西巴拉那州上巴拉那河上游平原的最后两个大型无坝支流中的七个特有鱼类的长度与重量的关系

这项研究报告了伊瓦河中七个特有鱼类的长度-重量关系（LWR）（Characidium heirmostigmata，Corydoras lacrimostigmata，Curculionichthys oliveirai，Hisonotus pachysarkos和Cambeva horacioi）以及Ivaí和Piquiri（Apareoodon vladii和Planaltina kalan））巴西巴拉那州的流域。在1994年11月至2019年7月之间收集并称重的鱼标本，用10％的福尔马林固定，并保存在70％的酒精中。对标准长度（SL-0.1厘米精度）和总重量（TW-0.01 g精度）进行了测量。对于代表LWR参数有用试验的鱼类，所获得的所有变态系数都在一般范围内。我们着重指出在巴拉那河上游生物多样性保护的关键地区，有关地方鱼类物种生物学信息的重要性。