A field-based definition of the thermal preference during spawning for allis shad populations (Alosa alosa)

Paumier, Alexis; Drouineau, Hilaire; Carry, L. Ray; Nachón, David José; Lambert, Patrick

doi:10.1007/s10641-019-00874-7

Cited by 5 publications

(11 citation statements)

References 58 publications

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“…The 15-26°C temperature range is consistent with previous analyses of shad reproduction (Acolas et al, 2004(Acolas et al, , 2006Cassou-Leins, 1981;Menneson-Boisneau & Boisneau, 1990;Paumier et al, 2019) and matches the thermal tolerance of embryos and larvae . The influence of discharge was lower than differences in day length and temperature.…”

Section: Environmental Influence On Reproductionsupporting

confidence: 88%

“…The most favourable spawning grounds would share the same physical habitat conditions as the potential spawning grounds, such as grain size or water depth, but would have more favourable thermal and hydrological conditions. Finally, the documented decrease in population abundance in the spawning rivers (Paumier et al, 2019;Rougier et al, 2012) can only be partially explained by the fluctuations of environmental conditions. A thermal refuge is a spawning ground with cooler temperatures during summer heat (Newell & Quinn, 2005).…”

Section: Management Implicationsmentioning

confidence: 99%

“…The identification of these potential spawning grounds will require databases of environmental factors and hydroclimatic models in French rivers at high resolutions. Finally, the documented decrease in population abundance in the spawning rivers (Paumier et al, 2019;Rougier et al, 2012) can only be partially explained by the fluctuations of environmental conditions. However, the cause of the decline needs to be explored for other habitat components and life stages, such as low levels of dissolved oxygen for juveniles in estuaries (Chevillot et al, 2017;Ficklin, Stewart, & Maurer, 2013;Portner & Knust, 2007).…”

Section: Management Implicationsmentioning

confidence: 99%

“…Allis shad populations were historically abundant along the European coast. In France, reproduction generally takes place over <2 months in the spring, from late April to late June (Bagliniere, Rochard, & Aprahamian., 2003;Paumier, Drouineau, Carry, Nachón, & Lambert, 2019). This population reproduces in the Garonne and Dordogne rivers in south-western France (Figure 1), where a fishing moratorium has been implemented since 2008 (Rougier et al, 2012).…”

Section: Introductionmentioning

confidence: 96%

“…In the French shad population, the adults spend 5 years in the ocean and return to rivers to reproduce before dying (Lambert, Martin Vandembulcke, Rochard, Bellariva, & Castelnaud, 2001;McDowall, 1988). In France, reproduction generally takes place over <2 months in the spring, from late April to late June (Bagliniere, Rochard, & Aprahamian., 2003;Paumier, Drouineau, Carry, Nachón, & Lambert, 2019). Spawners reproduce at night, with a peak in reproduction at 03.00 (Cassou-Leins, 1981;Menneson-Boisneau & Boisneau, 1990).…”

Section: Introductionmentioning

confidence: 99%

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Assessing the relative importance of temperature, discharge, and day length on the reproduction of an anadromous fish (Alosa alosa)

et al. 2019

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Climate change threatens anadromous fishes such as the allis shad (Alosa alosa)populations of which have declined since the 20th century in Europe. Sensitivity to climate change could be quantified by determining the fish's spawning behaviour, defined as the timing of reproduction (i.e. spawning events) as a function of temporally variable environmental factors. The cues that fish use to time reproduction could determine their response to climate change.2. A machine learning technique (boosted regression tree) was calibrated using a 14-year dataset composed of daily measures of environmental factors and fish occurrences during reproduction. The boosted regression tree provides complete insight into the complex relationship between the spawning probability, i.e. the probability for a fish to reproduce, and environmental factors that might evolve with climate change.3. The spawning probability was positively related to day length (44.6%) and water temperature (34.7%) and negatively related to river discharge (20.7%). Optimal reproductive conditions corresponded to a difference in day length between 0 and 0.04 hr, a water temperature between 15 and 26°C and a river discharge between 55 and 665 m 3 /s; these conditions are currently being utilised by allis shad populations in the Garonne and Dordogne rivers, France.4. This study highlights the relative influence of environmental factors on the observed spawning period as well as the evolution of habitat suitability during the 14-year period. The novelty of this study stems from assessing population process data, i.e. the occurrence of fish reproduction, rather than mere occurrence data in an ecological niche model study. Climate change may lead to a shift in spawning phenology, as the water temperature and river discharge will also change. Therefore, conservation plans need to integrate these effects on spawning grounds. K E Y W O R D Sboosted regression tree, climate change, ecological niche, ecospat, migratory fish How to cite this article: Paumier A, Drouineau H, Boutry S, Sillero N, Lambert P. Assessing the relative importance of temperature, discharge, and day length on the reproduction of an anadromous fish (Alosa alosa). Freshwater Biology.

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Section: Environmental Influence On Reproductionsupporting

confidence: 88%

Section: Management Implicationsmentioning

confidence: 99%

Section: Management Implicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Assessing the relative importance of temperature, discharge, and day length on the reproduction of an anadromous fish (Alosa alosa)

et al. 2019

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Simulating upstream migration and spawning timing effects to allis shad reproductive success

et al. 2021

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The dynamics of spawning acts by a semelparous fish and its associated energetic costs

Tentelier

Bouchard

Bernardin

et al. 2018

Preprint

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During the reproductive season, animals have to manage both their energetic and gametic budgets. In particular, for semelparous capital breeders with determinate fecundity and no parental care other than gametic investment, the depletion of energetic stock must match the depletion of gametic stock, so that individuals get exhausted just after their last egg is laid. Although these budgets are managed continuously, monitoring the dynamics of mating acts and energy expenditure at a fine temporal scale in the wild is challenging.This study aimed to quantify the individual dynamics of spawning acts and the concomitant energy expenditure of female Allis shad (Alosa alosa) throughout their mating season.Using eight individual-borne accelerometers for one month, we collected tri-axial acceleration, temperature, and pressure data that we analysed to i) detect the timing of spawning acts, ii) estimate energy expenditure from tail beat frequency and water temperature, and iii) monitor changes in body roundness from the position of the dorsally-mounted tag relative to the vertical.Female shad had a higher probability to spawn during warmer nights, and their spawning acts were synchronized within each active night. They underwent warmer temperature during the day, when they stayed deeper, and they swam faster at night, when they spent more energy. Over one month of spawning, they performed on average 15.75 spawning acts, spent on average 6 277 kJ and died with a significant portion of residual oocytes. The acceleration-based indicator of body roundness was correlated to condition coefficient measured at capture, and globally decreased through the spawning season, although the indicator was noisy and was not correlated to changes in estimated energy expenditure.Despite significant individual variability, our results indicate that female shad exhausted their energetic stock faster than their egg stock. Water warming might accentuate the mismatch between energetic and gametic stocks. Although perfectible, the three complimentary analyses of acceleration data are promising for in situ monitoring of energy expenditure related to specific behaviour.

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A field-based definition of the thermal preference during spawning for allis shad populations (Alosa alosa)

Cited by 5 publications

References 58 publications

Assessing the relative importance of temperature, discharge, and day length on the reproduction of an anadromous fish (Alosa alosa)

Assessing the relative importance of temperature, discharge, and day length on the reproduction of an anadromous fish (Alosa alosa)

Simulating upstream migration and spawning timing effects to allis shad reproductive success

The dynamics of spawning acts by a semelparous fish and its associated energetic costs

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