Naslov
Determinants of invasion success in a freshwater invader: exploring the occurrence of hepatopancreatitis and changes in the immune response in signal crayfish population in Croatia

Autori
Hudina, Sandra ; Dragičević, Paula ; Maguire, Ivana ; Gračan, Romana ; Tarandek, Anita ; Abramović, Lucija ; Blažević, Sofia Ana ; Bekavac, Ana ; Beck, Ana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts (4th Symposium of Freshwater Biology) / Mičetić Stanković, Vlatka ; Ivković, Marija ; Matoničkin Kepčija, Renata ; Sertić Perić, Mirela ; Miliša, Marko ; Vilenica, Marina - Zagreb : Hrvatsko udruženje slatkovodnih ekologa (HUSEk), 2023, 17-17

Skup
4th Symposium of Freshwater Biology

Mjesto i datum
Zagreb, Hrvatska, 21.04.2023

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
hepatopancreatitis ; immunity ; Pacifastacus leniusculus ; histopathology

Sažetak
Invasive alien crayfish threaten freshwater biodiversity and native crayfish fauna. However, the invasion success of an otherwise successful crayfish invader may be compromised by local environmental conditions or presence of local pathogens which can affect invader’s physiology, immune status, health, and fitness. Here we report the occurence of idiopathic necrotizing hepatopancreatitis and changes in the immune response in the signal caryfish, one of the most successful freshwater invaders, in a recently invaded Korana River in Croatia. We sampled and histologically analysed 73 signal crayfish individuals collected in three consecutive years (2018-2020) and used several standard immune parameters (encapsulation response, hemocyte count, phenoloxidaze activity and total prophenoloxidaze) to: i) compare immune response of the signal crayfish along its invasion range, ii) analyze effects of specific predictors (water temperature, crayfish abundance and body condition) on its immune response changes. Our results show very high prevalence of lesions in hepatopancreas of signal crayfish (>91%), with 14% of individuals displaying heavy and 51% moderate necroses and/or inflammation in the tubular and interstitial structures of the organ. Heavy histopathological changes in hepatopancreas were correlated with lower organosomatic condition. Immune response exhibited significant differences along the invasion range of the signal crayfish and was mostly affected by water temperature and population abundance. Obtained results offer a baseline for elucidating the role of immunocompetence in the signal crayfish invasion in the Korana River, while aetiology of necrotizing hepatopancreatitis needs to be further investigated to determine its potential impact on signal crayfish invasion success.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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