Metabolic characteristics of early life history stages of native marble trout (Salmo marmoratus
) and introduced brown trout (Salmo trutta
) and their hybrids in the Soča River

Knowledge of local adaptation and adaptive potential of natural populations is becoming increasingly relevant due to anthropogenic changes in the environment, such as climate change. The concern is that populations will be negatively affected by increasing temperatures without the capacity to adapt. Temperature-related adaptability in traits related to phenology and early life history are expected to be particularly important in salmonid fishes. We focused on the latter and investigated whether four populations of brown trout ( Salmo trutta ) are locally adapted in early life-history traits. These populations spawn in rivers that experience different temperature conditions during the time of incubation of eggs and embryos. They were reared in a common-garden experiment at three different temperatures. Quantitative genetic differentiation ( Q ST ) exceeded neutral molecular differentiation ( F ST ) for two traits, indicating local adaptation. A temperature effect was observed for three traits. However, this effect varied among populations due to locally adapted reaction norms, corresponding to the temperature regimes experienced by the populations in their native environments. Additive genetic variance and heritable variation in phenotypic plasticity suggest that although increasing temperatures are likely to affect some populations negatively, they may have the potential to adapt to changing temperature regimes.

Download Full-text

Hybridization mechanisms between the endangered marble trout (Salmo marmoratus) and the brown trout (Salmo trutta) as revealed by in-stream experiments

Biological Conservation ◽

10.1016/j.biocon.2007.01.004 ◽

2007 ◽

Vol 136 (4) ◽

pp. 602-611 ◽

Cited By ~ 37

Author(s):

Torben Meldgaard ◽

Alain J. Crivelli ◽

Dusan Jesensek ◽

Gilles Poizat ◽

Jean-François Rubin ◽

...

Keyword(s):

Brown Trout ◽

Salmo Trutta ◽

Marble Trout ◽

Brown Trout Salmo Trutta ◽

Salmo Marmoratus

Download Full-text

Otolith Microstructure during the Early Life-History Stages of Brown Trout: Validation and Interpretation

North American Journal of Fisheries Management ◽

10.1080/02755947.2012.746245 ◽

2013 ◽

Vol 33 (1) ◽

pp. 108-116 ◽

Cited By ~ 9

Author(s):

Julian J. Dodson ◽

Pascal Sirois ◽

Gaétan Daigle ◽

Philippe Gaudin ◽

Agnès Bardonnet

Keyword(s):

Life History ◽

Brown Trout ◽

Early Life ◽

Early Life History ◽

Otolith Microstructure ◽

Life History Stages

Download Full-text

Oceanographic influence on the early life-history stages of benthic invertebrates during the polar night

Polar Biology ◽

10.1007/s00300-021-02918-0 ◽

2021 ◽

Author(s):

Kirstin Meyer-Kaiser ◽

Hongju Chen ◽

Xiaoshou Liu ◽

Samuel R. Laney

Keyword(s):

Life History ◽

Benthic Invertebrates ◽

Early Life ◽

Early Life History ◽

Polar Night ◽

Life History Stages

Download Full-text

Significance of Egg and Larval Size to Recruitment Variability of Temperate Marine Fish

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f91-215 ◽

1991 ◽

Vol 48 (10) ◽

pp. 1820-1828 ◽

Cited By ~ 82

Author(s):

Pierre Pepin ◽

Ransom A. Myers

Keyword(s):

Life History ◽

Marine Fish ◽

Early Life ◽

Univariate Analysis ◽

Early Life History ◽

Fish Populations ◽

Larval Size ◽

Larval Phase ◽

Life History Stages ◽

Recruitment Variability

Recruitment variability is commonly associated with fluctuations in abundance of marine fish populations. Previous studies have focussed on stock-specific correlative or mechanistic models or on comparisons of recruitment variations of several stocks or species. The purpose of this study is to determine whether recruitment variability of commercial marine fish populations is associated with either size or the duration of early life history stages. The analysis was performed with data from 86 stocks representing 21 species of commercial marine fish. Univariate analysis shows that neither egg size nor the length at hatch is significantly correlated with recruitment variability. The change in length during the larval phase, which is representative of the duration of the stage, is significantly positively correlated with recruitment variability. Multivariate analysis shows that recruitment variability increases with increasing length at metamorphosis but that recruitment variability is poorly associated with length at hatch. The degree of serial correlation is related to the relative duration of egg and larval stages. The results clearly indicate that recruitment variability is linked to characteristics of early life history stages.

Download Full-text