LIVIVO - Das Suchportal für Lebenswissenschaften

switch to English language
Erweiterte Suche

Suchergebnis

Treffer 1 - 2 von insgesamt 2

Suchoptionen

  1. Artikel ; Online: Polygynandry and high genetic diversity supported by kinship and population genetics from neotropical catfish ichthyoplankton

    Frantine‐Silva, Wilson / Savada, Camila Satie / de Almeida, Fernanda Simões / Orsi, Mário Luís

    Ecology of Freshwater Fish. 2023 Apr., v. 32, no. 2 p.406-415

    2023  

    Abstract: Knowledge about reproductive biology is critical for understanding species ecology and evolution, hence their conservation. However, such information remains elusive for many species due to the difficulty of observing mating in nature. Herein, we coupled ...

    Abstract Knowledge about reproductive biology is critical for understanding species ecology and evolution, hence their conservation. However, such information remains elusive for many species due to the difficulty of observing mating in nature. Herein, we coupled population and sociogenetic analysis to assess the reproductive biology of an important South American catfish, the “painted catfish” Pimelodus maculatus. We analysed the genetic diversity and kinship patterns of three wild ichthyoplankton samples identified by DNA barcoding and screened with microsatellite loci. We found the same trend in the three samples analysed: a high number unrelated larvae (r < 0.25) and potential parents involved (Ca1, 24♀:24♂; Ca2, 21♀:23♂; Cin, 24♀:25♂), as well as a high number of familial clusters (ML: 19‐21; MCMC: 23‐26). The data indicate a parental sexual proportion close to 1:1 and a polygynandrous mating system. We found high levels of genetic diversity, low GST values (GST < 0.014), but moderate DEST values between the tributary and reservoir samples (DEST > 0.25; Cin x Ca1 or Cin x Ca2), a similar pattern to the observed in adult populations. These results indicate that the mating system of P. maculatus has played an important role in minimising the loss of genetic diversity, a condition that may have favoured the species in a highly fragmented landscape.
    Schlagwörter DNA barcoding ; Neotropics ; Pimelodus ; adults ; catfish ; evolution ; freshwater fish ; genetic variation ; habitat fragmentation ; ichthyoplankton ; kinship ; microsatellite repeats ; population genetics
    Sprache Englisch
    Erscheinungsverlauf 2023-04
    Umfang p. 406-415.
    Erscheinungsort John Wiley & Sons, Ltd
    Dokumenttyp Artikel ; Online
    Anmerkung JOURNAL ARTICLE
    ZDB-ID 913011-1
    ISSN 0906-6691
    ISSN 0906-6691
    DOI 10.1111/eff.12695
    Datenquelle NAL Katalog (AGRICOLA)

    Volltext online

    Zusatzmaterialien

    Kategorien

    Verfügbar in ZB MED Bonn

    Z 5359: Hefte anzeigen

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

    Fernleihe an ZB MED

    Sie können sich den gewünschten Titel als lokale Nutzerin oder lokaler Nutzer von ZB MED direkt an den Standort Köln schicken lassen.

  2. Artikel: Hatchery fish stocking: case study, current Brazilian state, and suggestions for improvement

    Casimiro, Armando Cesar Rodrigues / Vizintim Marques, Ana Carolina / Claro-Garcia, Alexander / Garcia, Diego Azevedo Zoccal / de Almeida, Fernanda Simões / Orsi, Mário Luís

    Aquaculture international. 2022 Oct., v. 30, no. 5

    2022  

    Abstract: Hatchery fish stocking is one of the main actions adopted as a form of conservation and replacement of fishing stocks. Under Brazilian law, the release of fish has become mandatory and is seen as one of the main ways of mitigating the negative effects on ...

    Abstract Hatchery fish stocking is one of the main actions adopted as a form of conservation and replacement of fishing stocks. Under Brazilian law, the release of fish has become mandatory and is seen as one of the main ways of mitigating the negative effects on fish populations and preserving the ichthyofauna. Since its institution, the efficiency of this method has been questioned by the Brazilian scientific community, due to the lack of monitoring based on scientific criteria. The objective of this work was to discuss the few available reports and to analyze their deficiencies and analyze the real risks and/or benefits arising from the methodologies employed in hatchery stocking activities developed in Brazil. For this, three different studies developed in the Paranapanema River, Southeast/South of Brazil, were evaluated seeking evidence of the efficiency or inefficiency of these actions, such as management of the conservation of fish species and stocks. Our analysis shows that this management policy is poorly evaluated, and review of the planning of the stocking programs is essential, in order to improve, update, modernize, and unify the knowledge of the producing stations with respect to the existing ecological and genetic studies, aiming at better monitoring and greater effectiveness in the results advance. Also, a protocol is suggested to standardize and guide new conservationist policies of hatchery fish stocking.
    Schlagwörter aquaculture ; case studies ; fish ; hatcheries ; issues and policy ; protocols ; rivers ; Brazil
    Sprache Englisch
    Erscheinungsverlauf 2022-10
    Umfang p. 2213-2230.
    Erscheinungsort Springer International Publishing
    Dokumenttyp Artikel
    ZDB-ID 1176356-5
    ISSN 1573-143X ; 0967-6120
    ISSN (online) 1573-143X
    ISSN 0967-6120
    DOI 10.1007/s10499-022-00898-4
    Datenquelle NAL Katalog (AGRICOLA)

    Volltext online

    Zusatzmaterialien

    Kategorien

    Verfügbar in ZB MED Bonn

    Z 5774: Hefte anzeigen

    Über subito bestellen

    Dieser Service ist kostenpflichtig (siehe Lieferbedingungen von subito). Bestellungen, die einen Artikel nebst Supplementary Material umfassen, werden grundsätzlich wie mehrfache Bestellungen bearbeitet. Gebühren fallen in diesen Fällen für jede einzelne Bestellung an.

    Fernleihe an ZB MED

    Sie können sich den gewünschten Titel als lokale Nutzerin oder lokaler Nutzer von ZB MED direkt an den Standort Köln schicken lassen.

Zum Seitenanfang