Consulta: subjectFacets:"Fish movement"
Registros recuperados: 2
Data/hora: 11/06/2024 07:04:42

A HMM-based model to geolocate pelagic fish from high-resolution individual temperature and depth histories: European sea bass as a case study
Provedor de dados: 5
Autores: Woillez, Mathieu; Fablet, Ronan; Tran-thanh Ngo,; Lalire, Maxime; Lazure, Pascal; De Pontual, Helene.
Numerous methods have been developed to geolocate fish from data storage tags. Whereas demersal species have been tracked using tide-driven geolocation models, pelagic species which undertake extensive migrations have been mainly tracked using light-based models. Here, we present a new HMM-based model that infers pelagic fish positions from the sole use of high-resolution temperature and depth histories. A key contribution of our framework lies in model parameter inference (diffusion coefficient and noise parameters with respect to the reference geophysical fields—satellite SST and temperatures derived from the MARS3D hydrodynamic model), which improves model robustness. As a case study, we consider long time series of data storage tags (DSTs) deployed on...
Tipo: Text
Palavras-chave: Fish movement; Archival tagging; Migration; Population structure; Hidden Markov Model (HMM); State-space model.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00300/41097/40270.pdf

Density estimator for strip transects when animals show directional movement and observation speed is slow
Provedor de dados: 5
Autores: Trenkel, Verena.
A strip transect population density estimator and its variance are presented. These take into account stochastic survey velocity as well as stochastic swimming velocity and non-random swimming direction of the surveyed animals. The estimator is mainly of interest for surveys of animals with a directional swimming behaviour and swimming velocities similar to the survey velocity, such as those carried out by divers or remotely operated vehicles.
Tipo: Text
Palavras-chave: Variance estimators; Abundance estimation; Bias; Fish movement; Visual transects.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-6655.pdf