scholarly journals Importance of small fishes and invasive crayfish in otter Lutra lutra diet in an English chalk stream

2017 ◽  
pp. 13 ◽  
Author(s):  
J. Robert Britton ◽  
Matthew Berry ◽  
Samantha Sewell ◽  
Corina Lees ◽  
Peter Reading
Keyword(s):  
Lutra Lutra ◽  
Invasive Crayfish ◽  
Chalk Stream

Morphologische Besonderheiten und Veränderungen in der Lunge beim Europäischen Fischotter (Lutra lutra)

2019 ◽  
Author(s):  
M Rinke ◽  
A Beineke ◽  
P Wohlsein ◽  
W Baumgärtner
Keyword(s):  
Lutra Lutra

Pulmonary hair embolism in a rescued free-ranging Eurasian otter Lutra lutra in Kinmen, Taiwan

2020 ◽  
Vol 142 ◽  
pp. 55-61
Author(s):  
WT Li ◽  
YL Chiang ◽  
TY Chen ◽  
CL Lai
Keyword(s):  
Foreign Body ◽  
Traumatic Injury ◽  
Lung Parenchyma ◽  
Giant Cells ◽  
Hair Shaft ◽  
Lutra Lutra ◽  
Lung Lobe ◽  
Eurasian Otter ◽  
Foreign Body Giant Cells ◽  
Free Ranging

Eurasian otters Lutra lutra are listed as Near Threatened on the IUCN Red List and are imperiled by habitat loss, water pollution, and poaching. Harassment and attacks by stray animals are also recognized threats to the health of wild Eurasian otters. Pulmonary hair embolism is a possible complication in animals with deep traumatic injury, but to date no cases have been reported in wildlife. A free-ranging, adult male Eurasian otter was rescued due to severe emaciation and multiple bite wounds. The otter died 3 d after rescue and was necropsied. Grossly, a 1.5 × 1.5 × 1.5 cm firm nodule was observed in the left cranial lung lobe. Histologically, a fragment of hair shaft surrounded by multinucleated foreign body giant cells was observed in a medium-sized vein, and extensive eosinophilic infiltration was noted in the adjacent vascular wall and lung parenchyma. Based on the gross and histological findings, the pulmonary lesion was consistent with eosinophilic pneumonia and vasculitis induced by hair embolism. The presence of well-formed multinucleated foreign body giant cells and eosinophils may imply a late stage of foreign body reaction, and thus the presumptive source of hair embolism is an animal bite. This is the first report of pulmonary hair embolism associated with animal bite in a rescued free-ranging Eurasian otter.

Estimating native and invasive crayfish distributions in relation to culvert barriers with environmental DNA

2019 ◽  
Vol 38 (3) ◽  
pp. 629-641 ◽  
Author(s):  
Kousuke Ikeda ◽  
Hideyuki Doi ◽  
Shigeharu Terui ◽  
Atsuko Kato ◽  
Takashi Mitsuzuka ◽  
...  
Keyword(s):  
Environmental Dna ◽  
Invasive Crayfish

Distribution and diet of recovering Eurasian otter (Lutra lutra) along the natural-to-urban habitat gradient (river Segura, SE Spain)

2021 ◽  
Author(s):  
Ettore Emanuele Dettori ◽  
Alessandro Balestrieri ◽  
Victor Manuel Zapata-Perez ◽  
Daniel Bruno ◽  
Nuria Rubio-Saura ◽  
...  
Keyword(s):  
Urban Habitat ◽  
Lutra Lutra ◽  
Se Spain ◽  
Eurasian Otter ◽  
Habitat Gradient

scholarly journals Eurasian otter (Lutra lutra) diet as an early indicator of recovery in defaunated river communities

2020 ◽  
Vol 117 ◽  
pp. 106547
Author(s):  
Marta Narváez ◽  
Sonia Cabezas ◽  
Francisco Blanco-Garrido ◽  
Raquel Baos ◽  
Miguel Clavero ◽  
...  
Keyword(s):  
Lutra Lutra ◽  
Early Indicator ◽  
Eurasian Otter ◽  
River Communities

Otter, Lutra lutra, occurrence in Europe and in France in relation to landscape characteristics

2002 ◽  
Vol 5 (4) ◽  
pp. 337-344 ◽  
Author(s):  
Jean-François Robitaille ◽  
Sophie Laurence
Keyword(s):  
Lutra Lutra ◽  
Landscape Characteristics

Behavioural responses of Australian freshwater crayfish (Cherax cainii and Cherax albidus) to exotic fish odour

2006 ◽  
Vol 54 (6) ◽  
pp. 399 ◽  
Author(s):  
S. G. Height ◽  
G. J. Whisson
Keyword(s):  
Western Australia ◽  
Predatory Fish ◽  
Behavioural Plasticity ◽  
Current Debate ◽  
Freshwater Crayfish ◽  
Indigenous Species ◽  
Exotic Fish ◽  
Behavioural Responses ◽  
Invasive Crayfish ◽  
Australian Freshwater

Exotic finfish and crayfish have been translocated into Western Australia for more than 100 years. Deliberate stocking and subsequent escape from man-made impoundments have resulted in widespread distribution of non-native yabbies (Cherax albidus) and the exotic redfin perch (Perca fluviatilis) in the State’s south-west. Both species are considered invasive and are known to compete with indigenous species for resources. The nature and degree of impact on native marron (Cherax cainii) is unclear and the subject of current debate. Other researchers have hypothesised that invasive species modify their behaviour in the presence of predators in a more rapid and advantageous manner than native species. This greater behavioural plasticity can result in displacement of indigenous species and successful colonisation of invaders. The aim of this study was to investigate behavioural responses of an indigenous crayfish (C. cainii) and an invasive crayfish (C. albidus) to odours from a native predator (Tandanus bostocki) and an exotic predatory fish (P. fluviatilis) present in Western Australia. Crayfish behaviour was observed in individual glass tanks following the addition of odours from native (T. bostocki) or exotic (P. fluviatilis) finfish predators. Marron exhibited minor behavioural modifications when presented with odours from native or exotic finfish. In contrast, the invasive yabby showed greater detection of odours, displaying significant changes in behaviour (P < 0.05). Yabbies also appeared to distinguish between food odour (commercial crayfish feed) and predator odour; however, neither marron nor yabbies displayed behaviour indicating that they could distinguish between a native or exotic fish predator. Results support the hypothesis that invasive crayfish species have a greater capacity for behavioural plasticity than non-invasive crayfish.

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