Habitat use by the European eel Anguilla anguilla in Irish waters

2006 ◽  
Vol 67 (4) ◽  
pp. 569-578 ◽  
Author(s):  
T. Arai ◽  
A. Kotake ◽  
T.K. McCarthy
Keyword(s):  
Habitat Use ◽  
Anguilla Anguilla ◽  
European Eel

scholarly journals Unsupervised Bayesian reconstruction of individual life histories from otolith signatures: case study of Sr:Ca transects of European eel (Anguilla anguilla) otoliths

2007 ◽  
Vol 64 (1) ◽  
pp. 152-165 ◽  
Author(s):  
Ronan Fablet ◽  
Françoise Daverat ◽  
Hélène De Pontual
Keyword(s):  
Habitat Use ◽  
Life Histories ◽  
Habitat Type ◽  
River Estuary ◽  
Anguilla Anguilla ◽  
Unsupervised Classification ◽  
European Eel ◽  
Otolith Growth ◽  
Individual Life ◽  
Growth Axis

The reconstruction of individual life histories from chemical otolith measures is stated as an unsupervised signal-processing issue embedded in a Bayesian framework. This computational methodology was applied to a set of 192 European eel (Anguilla anguilla) otoliths. It provided a robust and unsupervised analysis of the individual chronologies of habitat use (either river, estuary, or coastal) from Sr:Ca measures acquired along an otolith growth axis. Links between Sr:Ca values and habitat, age, and season and the likelihood of the transitions from one habitat type to another were modelled. Major movement characteristics such as age at transition between habitats and time spent in each habitat were estimated. As a straightforward output, an unsupervised classification of habitat use patterns showed great variability. Using a hidden Markov model, 37 patterns of habitat use were found, with 20 different patterns accounting for 90% of the sample. In accordance with literature, residence behaviour was observed (28% of the eels). However, about 72% changed habitat once or several times, mainly before age 4. The potential application of this method to any other measures taken along an otolith growth axis to reconstruct individual chronologies gives a new insight in life history tactics analysis.

scholarly journals Phenotypic plasticity in habitat use and growth of the European eel (Anguilla anguilla) in transitional waters in the Mediterranean area

2013 ◽  
Vol 23 (1) ◽  
pp. 65-76 ◽  
Author(s):  
Fabrizio Capoccioni ◽  
Dai-Yu Lin ◽  
Yoshiyuki Iizuka ◽  
Wann-Nian Tzeng ◽  
Eleonora Ciccotti
Keyword(s):  
Phenotypic Plasticity ◽  
Habitat Use ◽  
Anguilla Anguilla ◽  
Mediterranean Area ◽  
European Eel ◽  
Transitional Waters ◽  
The Mediterranean

scholarly journals Occurrence and habitat use of European eel (Anguilla anguilla) in running waters: lessons for improved monitoring, habitat restoration and stocking

2019 ◽  
Vol 53 (4) ◽  
pp. 639-650 ◽  
Author(s):  
Erik Degerman ◽  
Carl Tamario ◽  
Johan Watz ◽  
P. Anders Nilsson ◽  
Olle Calles
Keyword(s):  
Habitat Use ◽  
Habitat Restoration ◽  
Anguilla Anguilla ◽  
European Eel ◽  
Running Waters

Metazoan Parasites and Health State of European Eel, Anguilla Anguilla (Anguilliformes, Anguillidae), From Tonga Lake and El Mellah Lagoon in the Northeast of Algeria

2018 ◽  
Vol 52 (4) ◽  
pp. 279-288 ◽  
Author(s):  
F. Bakaria ◽  
S. Belhaoues ◽  
N. Djebbari ◽  
M. Tahri ◽  
I. Ladjama ◽  
...  
Keyword(s):  
Brackish Water ◽  
Parasite Species ◽  
Anguilla Anguilla ◽  
European Eel ◽  
Health State ◽  
Component Community ◽  
Metazoan Parasites ◽  
Parasite Communities ◽  
High Dominance ◽  
Argulus Foliaceus

Abstract The aim of the study was to examine metazoans parasite communities of European eels (Anguilla anguilla) in freshwater (Tonga Lake) and brackish water (El Mellah lagoon) in the northeast of Algeria. Six parasite taxa were collected: one monogenean, Pseudodactylogyrus sp.; two crustaceans, Ergasilus sp. and Argulus foliaceus; two nematodes, Cucullanus sp. and Anguillicola crassus; one cestode, Bothriocephalus claviceps. Th e most prevalent parasite taxa in freshwater were Pseudodactylogyrus sp., A. crassus and Bothriocephalus claviceps; whereas in the brackish water, eels were infected mainly with A. crassus. Th e characteristics of the parasite component community structure revealed low parasite species diversity and high dominance values in eels from the two localities. Both communities were dominated by a single parasite species: Tonga eels by the monogenean Pseudodactylogyrus sp. and El Mellah lagoon eels by the nematode A. crassus, verified by high Berger-Parker dominance values of 0.76 and 0.87 respectively.

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