@article {9472,
	title = {Recruitment dynamics of Hiatella arctica within a high Arctic site (Young Sound Fjord, NE Greenland)},
	journal = {Polar Biology},
	volume = {46},
	year = {2023},
	month = {Jan-12-2023},
	pages = {1275 - 1286},
	abstract = {Recruitment dynamics including what determines the success or failure of Arctic benthic invertebrates are poorly known despite their important role for population dynamics. The main objective of this study was to assess the potential influence of extreme physical constraints related to freshwater discharge on the recruitment of a dominant bivalve Hiatella arctica within a High Arctic fjord (Young Sound, NE Greenland). We collected young recruits over several sampling periods from 2016 to 2018 at two contrasting sites (inner vs. middle fjord) for 5-weeks to 12-months and measured their abundance, size at metamorphosis and lipid class composition. Young stages of H. arctica settled from June to the end of October, when trophic conditions are optimal. We hypothesize that growth stops during winter due to poor trophic conditions. Data suggest that abundance of recruits, their total lipid concentration and composition of lipid classes are similar at both sites. However, size classes were different with six separate cohorts detected at one station and one at the inner station, which may be attributed to discrete spawning events and possible secondary migration. Based on an assessment of their potential age, we hypothesize that spat batches recruiting earlier in the summer exhibit better growth performance probably related to better food quality and quantity.},
	keywords = {Arctic, Bivalve recruitment, Lipids classes, prodissoconch II},
	issn = {0722-4060},
	doi = {10.1007/s00300-023-03201-0},
	url = {https://link.springer.com/10.1007/s00300-023-03201-0},
	author = {Veillard, Delphine and Tremblay, Rejean and Sejr, Mikael K. and Chauvaud, Laurent and Cam, Emmanuelle and Olivier, Fr{\'e}d{\'e}ric}
}
@article {3488,
	title = {Veliger Size at Metamorphosis and Temporal Variability in Prodissoconch II Morphometry in the Blue Mussel (Mytilus edulis): Potential Impact on Recruitment},
	journal = {Journal of Shellfish Research},
	volume = {33},
	year = {2014},
	month = {08/2014},
	pages = {443-455},
	abstract = {<p>Examination of the larval shell (prodissoconch) of molluscs with planktotrophic development can provide valuable information on their planktonic and early benthic life. We examined temporal variability of abundance and size among 11,994 veligers of the blue mussel (<em>Mytilus edulis</em>) in a coastal lagoon during settling periods between 1995 and 2009. Size and date at metamorphosis during the recruitment season were determined for 1,925 postlarvae (shell length, 255{\textendash}900 {\textmu}m) with prodissoconch II (PII) measurements. Emphasizing the recurrence of metamorphosis delay in the field, our study reveals a net increase in mean size at metamorphosis through time, with means for PII size ranging from 255{\textendash}288 {\textmu}m early in summer (after peak spawning events) to 400{\textendash}422 {\textmu}m (PII) during late July to early September. By estimating the {\textquotedblleft}true{\textquotedblright} settlement date using the amount of dissoconch secreted after metamorphosis, such time-series analyses appropriately recapitulated the temporal pattern of mean pediveliger (competent larvae) size in the plankton. Our results demonstrate that greater settlement success rates were related to small size at metamorphosis{\textemdash}in particular, less than 320 {\textmu}m. Seasonal increase in mean PII size occurring during the latter part of the settling period may be explained by competent veligers remaining adrift and delayed metamorphosis as a result of the lack of favorable encounters with a suitable substrate or the absence of specific trophic signals, or cues, required for stimulating settlement, thus forcing larvae to continue planktonic growth. The difference between the smallest and largest means for PII size corresponds to 122 {\textmu}m of larval shell growth, or 47.8\%, potentially representing a 322\% difference in larval body mass at settlement.</p>
},
	keywords = {blue mussel, delayed metamorphosis, larval settlement, Mytilus edulis, prodissoconch II, recruitment, veligers},
	doi = {http://dx.doi.org/10.2983/035.033.0213},
	url = {http://www.bioone.org/doi/full/10.2983/035.033.0213},
	author = {Martel, Andr{\'e} L. and R{\'e}jean Tremblay and Nicolas Toupoint and Fr{\'e}d{\'e}ric Olivier and Myrand, B}
}
