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  1. Article: Ichthyofauna in the last free-flowing river of the Lower Iguaçu basin: the importance of tributaries for conservation of endemic species.

    Pini, Suelen Fernanda Ranucci / Makrakis, Maristela Cavicchioli / Neves, Mayara Pereira / Makrakis, Sergio / Shibatta, Oscar Akio / Kashiwaqui, Elaine Antoniassi Luiz

    ZooKeys

    2021  Volume 1041, Page(s) 183–203

    Abstract: The fish fauna from the Lower Iguaçu River and tributaries upstream of the Iguaçu Falls, the last free-flowing river stretch, were investigated. Twenty five sites in tributaries and the main channel were sampled between 2010 and 2016 using several kinds ... ...

    Abstract The fish fauna from the Lower Iguaçu River and tributaries upstream of the Iguaçu Falls, the last free-flowing river stretch, were investigated. Twenty five sites in tributaries and the main channel were sampled between 2010 and 2016 using several kinds of fishing gear. The species were categorized according to their size, origin, and conservation status. Species richness and abundance in the main channel and tributaries were compared. In total, 87,702 specimens were recorded, comprising 76 species, 25 families, 53 genera, and eight orders. Characiformes and Siluriformes were the richest orders, representing 92% of the total specimens; Characidae, Cichlidae, Pimelodidae, and Loricariidae were the richest families. The fish fauna was composed of small and medium-sized species and included endemic (42%), autochthonous (24%), allochthonous (21%), and exotic (9%) species, as well as hybrids (4%). Significant differences in the relative numerical abundance of species were found among sites.
    Language English
    Publishing date 2021-06-03
    Publishing country Bulgaria
    Document type Journal Article
    ZDB-ID 2445640-8
    ISSN 1313-2970 ; 1313-2989
    ISSN (online) 1313-2970
    ISSN 1313-2989
    DOI 10.3897/zookeys.1041.63884
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Ichthyofauna in the last free-flowing river of the Lower Iguaçu basin: the importance of tributaries for conservation of endemic species

    Pini, Suelen Fernanda Ranucci / Makrakis, Maristela Cavicchioli / Neves, Mayara Pereira / Makrakis, Sergio / Shibatta, Oscar Akio / Kashiwaqui, Elaine Antoniassi Luiz

    ZooKeys. 2021 June 03, v. 1041

    2021  

    Abstract: The fish fauna from the Lower Iguaçu River and tributaries upstream of the Iguaçu Falls, the last free-flowing river stretch, were investigated. Twenty five sites in tributaries and the main channel were sampled between 2010 and 2016 using several kinds ... ...

    Abstract The fish fauna from the Lower Iguaçu River and tributaries upstream of the Iguaçu Falls, the last free-flowing river stretch, were investigated. Twenty five sites in tributaries and the main channel were sampled between 2010 and 2016 using several kinds of fishing gear. The species were categorized according to their size, origin, and conservation status. Species richness and abundance in the main channel and tributaries were compared. In total, 87,702 specimens were recorded, comprising 76 species, 25 families, 53 genera, and eight orders. Characiformes and Siluriformes were the richest orders, representing 92% of the total specimens; Characidae, Cichlidae, Pimelodidae, and Loricariidae were the richest families. The fish fauna was composed of small and medium-sized species and included endemic (42%), autochthonous (24%), allochthonous (21%), and exotic (9%) species, as well as hybrids (4%). Significant differences in the relative numerical abundance of species were found among sites. Ancistrus mullerae and Rhamdia branneri (endemic) were indicator species for tributaries inside of Iguaçu National Park (INP), while Phalloceros harpagos (autochthonous) and Ictalurus punctatus (exotic) for tributaries outside of INP and Odontesthes bonariensis (allochthonous) for the main channel. The last dam-free stretch of the Lower Iguaçu River and tributaries upstream the Iguaçu Falls exhibits a rich endemic fish fauna, including some rare, endangered species (Steindachneridion melanodermatum, Gymnogeophagus taroba, and Psalidodon gymnogenys). These findings are essential to predict and understand the effects caused by the new Baixo Iguaçu Hydroelectric Power Plant and highlight the importance of tributaries and Iguaçu National Park for conservation of endemic species.
    Keywords Ancistrus ; Characidae ; Gymnogeophagus ; Ictalurus punctatus ; Odontesthes bonariensis ; Phalloceros harpagos ; Rhamdia ; Steindachneridion ; basins ; conservation status ; fauna ; fish ; hydroelectric power ; indicator species ; indigenous species ; national parks ; power plants ; rivers ; species richness
    Language English
    Dates of publication 2021-0603
    Size p. 183-203.
    Publishing place Pensoft Publishers
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 2445640-8
    ISSN 1313-2970 ; 1313-2989
    ISSN (online) 1313-2970
    ISSN 1313-2989
    DOI 10.3897/zookeys.1041.63884
    Database NAL-Catalogue (AGRICOLA)

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  3. Article: Population structure and reproduction of Steindachneridion melanodermatum (Siluriformes: Pimelodidae), a large catfish endemic to Neotropical ecoregion

    de Assumpção, Lucileine / Fávaro, Luís Fernando / Makrakis, Sergio / Sarai da Silva, Patrícia / Pini, Suelen Fernanda Ranucci / Kashiwaqui, Elaine Antoniassi Luiz / Makrakis, Maristela Cavicchioli

    Marine & freshwater research. 2021, v. 72, no. 7

    2021  

    Abstract: The population structure and reproductive biology of the surubim of Iguaçu, Steindachneridion melanodermatum, a large endemic and endangered catfish from Iguaçu River basin, were evaluated. In total, 182 specimens of this species were sampled from ... ...

    Abstract The population structure and reproductive biology of the surubim of Iguaçu, Steindachneridion melanodermatum, a large endemic and endangered catfish from Iguaçu River basin, were evaluated. In total, 182 specimens of this species were sampled from September 2010 to December 2016 in the Lower Iguaçu River, including some tributaries. The determination of the cycle and reproductive period was undertaken by assessing the mean variation in the values of the gonadosomatic index (GSI) of females and males, as well as by the frequency distribution of the stages of gonadal development on the basis of macroscopic and microscopic analyses. The total length and bodyweight ranged from 21 to 102cm and from 82.8 to 15670g respectively. The reproductive period of this species was from June to September (winter and early spring), and may extend until November, with GSI peaking in August for males and September for females. The size at first maturation (L50) corresponded to 39.5cm for females and 43.9cm for males. Spawning in this species was associated with lower water temperatures, and high discharge and dissolved oxygen concentration. Our findings are crucial in assisting the development of effective measures and specific criteria for the conservation of this endangered species.
    Keywords Neotropics ; Steindachneridion ; body weight ; catfish ; dissolved oxygen ; ecoregions ; endangered species ; frequency distribution ; freshwater ; gonadosomatic index ; gonads ; population structure ; research ; rivers ; spring ; watersheds ; winter
    Language English
    Size p. 1004-1018.
    Publishing place CSIRO Publishing
    Document type Article
    ZDB-ID 1283028-8
    ISSN 1323-1650
    ISSN 1323-1650
    DOI 10.1071/MF19373
    Database NAL-Catalogue (AGRICOLA)

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  4. Article: Deep Pools: Ecological Sanctuaries for Steindachneridion melanodermatum, a Large Endemic and Endangered Pimelodid of the Iguaçu River

    Assumpção, Lucileine de / Makrakis, Maristela Cavicchioli / Silva, Jhony Ferry Mendonça da / Moraes, Karane Allison Silvestre de / Pini, Suelen Fernanda Ranucci / Silva, Patrícia Sarai da / Kashiwaqui, Elaine Antoniassi Luiz / Gentil, Eduardo / Souza-Shibatta, Lenice / Shibatta, Oscar Akio / Makrakis, Sergio

    Water. 2021 June 19, v. 13, no. 12

    2021  

    Abstract: Steindachneridion melanodermatum, an endemic and endangered species, is the largest catfish in the Lower Iguaçu River basin. Currently, the wild population of this species no longer exists in most of this basin, probably due to the loss of habitat by ... ...

    Abstract Steindachneridion melanodermatum, an endemic and endangered species, is the largest catfish in the Lower Iguaçu River basin. Currently, the wild population of this species no longer exists in most of this basin, probably due to the loss of habitat by successive hydroelectric dams. This study evaluated the spatial distribution and abundance of S. melanodermatum in the last free-flowing river stretch of approximately 190 km downstream from the Salto Caxias Dam, upstream of the Iguaçu Falls, as well as some tributaries. Hydroacoustic and fishing campaigns were performed between September 2010 to December 2016 to characterize the preferred habitat. A total of 180 specimens was sampled with higher abundances in a protected area near Iguaçu Falls in the Iguaçu National Park. Twenty-four deep pools were identified with maximum depths ranging from 5 to 25 m: 21 pools were along the main channel of the Iguaçu River, and three pools were in tributaries. Deep pools are preferential habitats for this species, especially the deep pool called Poço Preto (P23) and its surroundings. Conservation strategies are required to protect these habitats and prevent S. melanodermatum from becoming extinct, such as establishing deep pools as ecological sanctuaries, intensifying the inspection of illegal fishing, and maintaining dam-free tributaries.
    Keywords Steindachneridion ; basins ; catfish ; conservation areas ; endangered species ; habitats ; hydroacoustics ; national parks ; rivers ; water ; watersheds
    Language English
    Dates of publication 2021-0619
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2521238-2
    ISSN 2073-4441
    ISSN 2073-4441
    DOI 10.3390/w13121700
    Database NAL-Catalogue (AGRICOLA)

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