Monitoring reproduction in fish: Assessing the adequacy of ogives and the predicted uncertainty of their L50 estimates for more reliable biological inferences

Mainguy, Julien; Bélanger, Martin; Ouellet-Cauchon, Geneviève; de Andrade Moral, Rafael

doi:10.1016/j.fishres.2023.106863

Fisheries Research

2024

DOI: 10.1016/j.fishres.2023.106863

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Monitoring reproduction in fish: Assessing the adequacy of ogives and the predicted uncertainty of their L50 estimates for more reliable biological inferences

Julien Mainguy,

Martin Bélanger,

Geneviève Ouellet-Cauchon

et al.

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Has the displacement of capelin Mallotus villosus (Müller, 1776) feeding ground induced a phenotypic response?

Singh,

Bjarnason,

Pampoulie

2024

Preprint

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Capelin in the Iceland-East Greenland-Jan Mayen region has experienced a range shift over the last two decades potentially driven by climate change. The population now inhabits the east Greenland shelf during the late feeding season, instead of the north Iceland shelf as in the past. Spatial and temporal variation in phenotypic and life history traits such as body size, weight, length- and age-at-maturation, as well as body condition were used to comprehend the population response to environmental perturbations, using biological data spanning two decades. The findings showed that length-at-age, weight-at-age, body condition, and length-at-maturity increased over time, whereas age-at-maturity remained stable. A finer spatiotemporal modelling of length- and weight-at-age for each specific period, before and after the shift, showed density-dependent effects were most prominent for all ages where the size and condition of organisms have improved over the years likely because of reduced intra-specific competition. Temperature effects were more apparent for ages 1 and 2 where fish attain a smaller body size in warmer conditions, and a positive relationship was apparent with net primary productivity. By adjusting life-history traits to a new environment, the capelin population has exhibited a plastic response. A good understanding of the ecological processes that drive population response can prove useful for management in the future.

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Has the displacement of capelin Mallotus villosus (Müller, 1776) feeding ground induced a phenotypic response?

Singh,

Bjarnason,

Pampoulie

2024

Preprint

View full text Add to dashboard Cite

show abstract

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Monitoring reproduction in fish: Assessing the adequacy of ogives and the predicted uncertainty of their L50 estimates for more reliable biological inferences

Cited by 1 publication

References 69 publications

Has the displacement of capelin Mallotus villosus (Müller, 1776) feeding ground induced a phenotypic response?

Has the displacement of capelin Mallotus villosus (Müller, 1776) feeding ground induced a phenotypic response?

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