Strong maternal effects and extreme heterogeneity of progeny development in the caridean shrimp Sclerocrangon boreas (Crangonidae) |
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Authors: | Cynthia Guay Bernard Sainte-Marie and Jean-Claude Brêthes |
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Institution: | (1) Institut des sciences de la mer (ISMER), Universit? du Qu?bec ? Rimouski, 300 all?e des Ursulines, Rimouski, QC, G5L 3A1, Canada;(2) Direction des sciences halieutiques et aquaculture, Institut Maurice-Lamontagne, P?ches et Oc?ans Canada, C.P. 1000, Mont-Joli, QC, G5H 3Z4, Canada;; |
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Abstract: | Sclerocrangon boreas is uncommon among marine coastal carideans in having a non-dispersing, abbreviated (2-stage) larval phase. We investigated
the implications of this strategy in terms of fecundity, offspring provisioning and brood care in S. boreas from the St. Lawrence Gulf and Estuary in 2009–2010. Fecundity scaled positively to female body size but was low due to the
production of large, lipid-rich eggs. Offspring size at all stages of development was positively related to female size. Larval
traits and lipid dynamics indicate obligatory lecithotrophic development from hatching to juvenile. The larva becomes a juvenile
on the mother and remains associated with her for sometime after. The co-occurrence of early egg stages among many juveniles
in some clutches raises the possibility that maternal care of juveniles includes the provisioning of trophic eggs or eggs
reclaimed from other females. |
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