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Coastal to Riverine Entry Timing During the Spawning Migration of the European Shads (Alosa spp.) : Drivers and Phenological Trends for the French Atlantic Coast Populations

Auteurs : Mikel Cherbero, Nils Teichert, Eric de Oliveira, Céline Le Pichon
Paru dans : Aquatic Conservation: Marine and Freshwater Ecosystems

Abstract
1. Introduction
2. Material and Methods
2.1. Study area : status of shad populations and monitoring sites
2.2. Migration monitoring data
2.3. Migration Phenology and Abundance Indicators
2.4. Environmental Variables
2.4.1. Photoperiod
2.4.2. Sea Temperature
2.4.3. River Temperature
2.4.4. River Discharge
2.4.5. Monitoring Site and Catchment Characteristics
2.5. Data Analysis
2.5.1. Influence of Coastal, River Conditions and Abundance on Migration Phenology
2.5.2. Trends in Migration Phenology
2.5.3. Match Between River Entry Timing and the Period With Optimal Breeding Temperatures
3. Results
3.1. Influence of Coastal, River Conditions and Abundance on Migration Phenology
3.2. Trends in Migration Phenology
3.3. Match Between River Entry Timing and the Period With Optimal Breeding Temperatures
4.Discussion