TY  - JOUR
A1  - Oetken, Matthias
A1  - Adler, Marissa
A1  - Alt, Katharina
A1  - Bachmann, Jean
A1  - Dombrowski, Andrea
A1  - Duhme, Franziska
A1  - Gabriel, Anna-Louise
A1  - Grünewald, Judith
A1  - Jourdan, Jonas
A1  - Lück, Maren
A1  - Mensch, Carola
A1  - Rösch, Dominik
A1  - Ruthemann, Anna
A1  - Terres, Susanne
A1  - Völker, Maja Lorina
A1  - Wilhelm, Ferdinand
A1  - Oehlmann, Jörg
T1  - The occurrence of intersex in different populations of the marine amphipod Echinogammarus marinus in North-West Brittany – a longterm-study
T2  - Frontiers in endocrinology
N2  - In the past two decades, an increasing body of studies has been published on the intersex phenomenon in separate-sexed crustaceans from marine and freshwater ecosystems. Various causes are being considered that could have an influence on the occurrence of intersex. Besides genetic factors, environmental conditions such as photoperiodicity, temperature, salinity and parasitism, but also environmental pollution with endocrine disrupting chemicals (EDCs) are discussed. As part of a long-term monitoring (2012 – 2020) in north-west Brittany, we recorded the occurrence of intersex in the marine amphipod Echinogammarus marinus. We quantified the intersex incidence at marine and estuarine sites and analyzed the incidence in relation to the endocrine potential of the sediments. Intersex occurred with mean frequencies between 0.87% and 12%. It was striking that the incidence of intersex increased with increasing distance from the sea. Since the highest incidence was observed at the range boundary of this stenohaline species, we assume that intersex is triggered by endocrine potential and increasing stress due to increasing freshwater content − and thus an interplay of different environmental factors.
KW  - crustacea
KW  - effect monitoring
KW  - intersexuality
KW  - sediment
KW  - endocrine disruption
KW  - range boundary
Y1  - 2021
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/81407
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-814078
SN  - 1664-2392
N1  - This study was funded by the state of Hesse, Germany.
VL  - 12
IS  - art. 816418
SP  - 1
EP  - 10
PB  - Frontiers Research Foundation
CY  - Lausanne
ER  -