Assessing brown trout (Salmo trutta) spawning movements with multistate capture–recapture models: a case study in a fully controlled Belgian brook

2012 ◽  
Vol 69 (6) ◽  
pp. 1091-1104 ◽  
Author(s):  
Béatrice M. Frank ◽  
Olivier Gimenez ◽  
Philippe V. Baret
Keyword(s):  
Data Integration ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Ecological System ◽  
Multistate Models ◽  
Natal Homing ◽  
Brown Trout Salmo Trutta ◽  
Capture Recapture ◽  
Spawning Behaviour

A multistate capture–recapture model was developed to estimate movements of brown trout ( Salmo trutta ) between a main stem and its headwater tributary and their survival and recapture probabilities in each stream. As all individuals entering or leaving the tributary were captured by trapping, the studied ecological system was fully controlled. The performance of multistate models combining two sources of data (trapping and electrofishing) available for 6 years was first evaluated. Realistic estimates were obtained to infer the average spawning behaviour of trout: (i) 58% returned to their original site after spawning, (ii) 9% returned to their natal site for reproduction, (iii) 55% of the ascending individuals performed natal homing. Because less informative systems are pervading, we eventually assessed the sensitivity of multistate models to the level of trapping data integration. A lack of such data led to an underestimation of movement probabilities, and we found that this effect could be compensated by electrofishing samplings.

Comparative analysis of microsatellite and allozyme markers: a case study investigating microgeographic differentiation in brown trout (Salmo trutta)

1998 ◽  
Vol 7 (3) ◽  
pp. 339-353 ◽  
Author(s):  
A. ESTOUP ◽  
F. ROUSSET ◽  
Y. MICHALAKIS ◽  
J.-M. CORNUET ◽  
M. ADRIAMANGA ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Brown Trout Salmo Trutta

Spawning behaviour and sex hormone levels in adult and precocious brown trout (Salmo trutta L.) males and the effect of anosmia

Chemoecology ◽  
1998 ◽  
Vol 8 (1) ◽  
pp. 9-17 ◽  
Author(s):  
K. Håkan Olsén ◽  
J. Torbjörn Järvi ◽  
Ian Mayer ◽  
Erik Petersson ◽  
Frederieke Kroon
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Sex Hormone ◽  
Hormone Levels ◽  
Brown Trout Salmo Trutta ◽  
Spawning Behaviour

scholarly journals A brown trout ( Salmo trutta ) population faces devastating consequences due to proliferative kidney disease and temperature increase: A case study from Austria

2019 ◽  
Vol 29 (3) ◽  
pp. 465-476 ◽  
Author(s):  
Karoline Waldner ◽  
Thomas Bechter ◽  
Stefan Auer ◽  
Florian Borgwardt ◽  
Mansour El‐Matbouli ◽  
...  
Keyword(s):  
Kidney Disease ◽  
Brown Trout ◽  
Temperature Increase ◽  
Salmo Trutta ◽  
Proliferative Kidney Disease ◽  
Brown Trout Salmo Trutta

Inter- and intra-specific variability in female salmonid spawning behaviour

1994 ◽  
Vol 72 (4) ◽  
pp. 636-642 ◽  
Author(s):  
Bjørn T. Barlaup ◽  
Harald Lura ◽  
Harald Sægrov ◽  
Rolf C. Sundt
Keyword(s):  
Atlantic Salmon ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Water Discharge ◽  
Selective Advantage ◽  
Data Series ◽  
Discharge Rates ◽  
Random Occurrence ◽  
Brown Trout Salmo Trutta ◽  
Spawning Behaviour

Egg pocket characteristics determined from the excavation of 29 stranded redds made by Atlantic salmon (Salmo salar) and brown trout (Salmo trutta) in the River Vosso in western Norway are presented. The egg pockets of Atlantic salmon were, on average, deeper (27.0 vs. 14.8 cm) and contained more eggs (707 vs. 148) than those of brown trout. An adaptive "test-digging" behaviour was indicated by the finding of a significant association between false redds and gravel classified as low-quality spawning substrate. Based on fecundity data and number of eggs per redd, it was estimated that individual Atlantic salmon and brown trout deposited their eggs in 8.4 and 5.7 different redds, respectively. A 100-year data series indicates that the high proportion of stranded salmon redds (23%) can be attributed to the high frequency (27% of the years) and random occurrence of low water discharge rates. Estimated probabilities of extinction and associated variances in fitness assigned different spawning behaviours suggest that the temporal and spatial variation in offspring survival produces a selective advantage for the multiple-redd tactics over the single-redd tactic. Moreover, in contrast to iteroparous salmonids, semelparous Oncorhynchus species invariably place all their offspring in one redd. This dichotomy can most likely be ascribed to the provision of parental care (i.e., redd guarding) by semelparous salmonids.

scholarly journals Saltwater spawning grounds of sea-run brown trout (Salmo trutta) in tidal waters of a major Norwegian river

2021 ◽  
Author(s):  
Sven-Erik Gabrielsen ◽  
Robert J. Lennox ◽  
Tore Wiers ◽  
Bjørn T. Barlaup
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Pink Salmon ◽  
River Mouth ◽  
Competitive Balance ◽  
Spawning Grounds ◽  
Sea Trout ◽  
Spawning Areas ◽  
Brown Trout Salmo Trutta ◽  
Spawning Behaviour

AbstractSea-run brown trout (Salmo trutta) have a highly phenotypically plastic life history that allows them to be effective colonizers and competitors in freshwater. This paper documents a previously unknown spawning behaviour in a brackish, tidally influenced estuary 14 km from the mouth of the Vosso River, a major Atlantic salmon- and sea-run brown trout–producing river in western Norway. Putative spawning gravel was observed, and sea-run brown trout deposited eggs that hatched in April. Survival of recruits was high (> 95%) in the tidal spawning gravel. These areas are strongly tidally influenced with a peak of 23.17 psu recorded at the lowest spawning ground. The observation of spawning so far from the river mouth may be unique in such a system with a long estuary but provides important insight into the biology of sea trout. Invasion of pink salmon, also known to spawn in estuaries, may negatively affect the competitive balance of sea trout with other salmonids in rivers where sea trout populations rely on recruitment from these relatively extreme spawning areas. Restoration of estuaries that have been modified by dredging or channelization may be important to ensure quality and heterogenous habitat for sea trout spawning given that haline spawning grounds could contribute to population resilience.

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