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

View ORCID ProfileCédric Tentelier, View ORCID ProfileColin Bouchard, Anaïs Bernardin, Amandine Tauzin, View ORCID ProfileJean-Christophe Aymes, View ORCID ProfileFrédéric Lange, View ORCID ProfileCharlotte Recapet, View ORCID ProfileJacques Rives
doi: https://doi.org/10.1101/436295
Cédric Tentelier
1Universite de Pau et des Pays de l’Adour, E2S UPPA, INRAE, ECOBIOP, Saint-Pée-sur-Nivelle, France
2Pôle Gestion des Migrateurs Amphihalins dans leur Environnement, OFB, INRAE, AGROCAMPUS OUEST, UNIV PAU & PAYS ADOUR/E2S UPPA
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  • For correspondence: cedric.tentelier@univ-pau.fr
Colin Bouchard
1Universite de Pau et des Pays de l’Adour, E2S UPPA, INRAE, ECOBIOP, Saint-Pée-sur-Nivelle, France
2Pôle Gestion des Migrateurs Amphihalins dans leur Environnement, OFB, INRAE, AGROCAMPUS OUEST, UNIV PAU & PAYS ADOUR/E2S UPPA
3Tour du Valat, Research Institute for the Conservation of Mediterranean Wetlands, Arles, France
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Anaïs Bernardin
1Universite de Pau et des Pays de l’Adour, E2S UPPA, INRAE, ECOBIOP, Saint-Pée-sur-Nivelle, France
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Amandine Tauzin
1Universite de Pau et des Pays de l’Adour, E2S UPPA, INRAE, ECOBIOP, Saint-Pée-sur-Nivelle, France
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Jean-Christophe Aymes
1Universite de Pau et des Pays de l’Adour, E2S UPPA, INRAE, ECOBIOP, Saint-Pée-sur-Nivelle, France
2Pôle Gestion des Migrateurs Amphihalins dans leur Environnement, OFB, INRAE, AGROCAMPUS OUEST, UNIV PAU & PAYS ADOUR/E2S UPPA
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Frédéric Lange
1Universite de Pau et des Pays de l’Adour, E2S UPPA, INRAE, ECOBIOP, Saint-Pée-sur-Nivelle, France
2Pôle Gestion des Migrateurs Amphihalins dans leur Environnement, OFB, INRAE, AGROCAMPUS OUEST, UNIV PAU & PAYS ADOUR/E2S UPPA
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Charlotte Recapet
1Universite de Pau et des Pays de l’Adour, E2S UPPA, INRAE, ECOBIOP, Saint-Pée-sur-Nivelle, France
2Pôle Gestion des Migrateurs Amphihalins dans leur Environnement, OFB, INRAE, AGROCAMPUS OUEST, UNIV PAU & PAYS ADOUR/E2S UPPA
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Jacques Rives
1Universite de Pau et des Pays de l’Adour, E2S UPPA, INRAE, ECOBIOP, Saint-Pée-sur-Nivelle, France
2Pôle Gestion des Migrateurs Amphihalins dans leur Environnement, OFB, INRAE, AGROCAMPUS OUEST, UNIV PAU & PAYS ADOUR/E2S UPPA
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Abstract

  1. During the reproductive season, animals have to manage both their energetic budget and gamete stock. 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 and fertilized. 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.

  2. 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.

  3. 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 plane.

  4. Female shad had a higher probability to spawn during warmer nights, and their spawning acts were synchronized (both individually and inter-individually) within each active night. They experienced warmer temperature, remained deeper, swan more slowly and spent less energy during daytime than night time. 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.

  5. Despite significant individual variability, our results indicate that female shad exhausted their energetic stock faster than their egg stock. Water warming will increase the rate of energy expenditure, which might increase the risk that shad die with a large stock of unspent eggs. Although perfectible, the three complementary analyses of acceleration data are promising for in situ monitoring of energy expenditure related to specific behaviour.

Competing Interest Statement

The authors have declared no competing interest.

Footnotes

  • Version 7 of this preprint has been peer-reviewed and recommended by Peer Community In Ecology (https://doi.org/10.24072/pci.ecology.100060)

  • https://doi.org/10.15454/NTFYCC

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted September 24, 2020.
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The dynamics of spawning acts by a semelparous fish and its associated energetic costs
Cédric Tentelier, Colin Bouchard, Anaïs Bernardin, Amandine Tauzin, Jean-Christophe Aymes, Frédéric Lange, Charlotte Recapet, Jacques Rives
bioRxiv 436295; doi: https://doi.org/10.1101/436295
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The dynamics of spawning acts by a semelparous fish and its associated energetic costs
Cédric Tentelier, Colin Bouchard, Anaïs Bernardin, Amandine Tauzin, Jean-Christophe Aymes, Frédéric Lange, Charlotte Recapet, Jacques Rives
bioRxiv 436295; doi: https://doi.org/10.1101/436295

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