Disturbance in invasion? Idiopathic necrotizing hepatopancreatitis in the signal crayfish Pacifastacus leniusculus (Dana, 1852) in Croatia

Bekavac, Ana; Beck, Ana; Dragičević, Paula; Dragun, Zrinka; Maguire, Ivana; Ivanković, Dušica; Fiket, Željka; Gračan, Romana; Hudina, Sandra (2021) Disturbance in invasion? Idiopathic necrotizing hepatopancreatitis in the signal crayfish Pacifastacus leniusculus (Dana, 1852) in Croatia. Journal of Fish Diseases, 45 (2). pp. 261-276. ISSN 0140-7775

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Abstract

As the most successful crayfish invader and possible vector for infectious agents, signal crayfish Pacifastacus leniusculus is among the major drivers of the native crayfish species decline in Europe. We describe histopathological manifestation and frequency of newly detected idiopathic necrotizing hepatopancreatitis along the invasion range of the signal crayfish in the Korana River in Croatia. Our results show extremely high prevalence of necrotizing hepatopancreatitis (97.3%), with 58.9% of individuals displaying mild and 31.5% moderate histopathological changes in the hepatopancreas, also reflected in the lower hepatosomatic index of analysed animals. Recorded histopathological changes were more frequent in the invasion core where population density is higher. Our preliminary screening of co-occurring native narrow-clawed crayfish Pontastacus leptodactylus showed lower incidence (33.3%) and only mild hepatopancreatic lesions, but potentially highlighted the susceptibility of native crayfish populations to this disease. Pilot analyses of dissolved trace and macro elements in water, sediment fractions and crayfish hepatopancreas do not highlight alarming or unusually high concentrations of analysed elements. Hepatopancreas microbiome analysis, using 16S rRNA gene amplicon sequencing, identified taxonomic groups that should be further investigated, along with impacts of the disease on health and viability of both invasive and native crayfish populations.

Item Type:	Article
Uncontrolled Keywords:	crayfish ; hepatopancreas ; histopathology ; invasive species
Subjects:	NATURAL SCIENCES > Biology NATURAL SCIENCES > Interdisciplinary Natural Sciences > Environmental Science
Divisions:	Division for Marine and Enviromental Research
Projects:	Project title Project leader Project code Project type Promjene sastava patogena i imunološkog odgovora tijekom širenja areala uspješnih invazivnih vrsta slatkovodnih rakova-STRIVE Sandra Hudina UIP-2017-05-1720 HRZZ Biomolekule koje vežu metale i zdravstveni poremećaji kod slatkovodnih organizama izloženih industrijskom otpadu-METABIOM Zrinka Dragun IP-2019-04-2636 HRZZ Transport, sudbina i toksičnost metal(oid)a otpuštenih iz ležišta industrijskog otpada-FORtIS Željka Fiket; Antonela Ninčević Grassino; Jelena Loborec; Sanja Kapelj; Matej Dolenec; Uroš Herlec; Gordana Medunić IP-2019-04-9354 HRZZ
Depositing User:	Zrinka Dragun
Date Deposited:	25 Jan 2024 12:56
URI:	http://fulir.irb.hr/id/eprint/8363
DOI:	10.1111/jfd.13552

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