Details

Autor(en) / Beteiligte

• Howe, Eric A.
• Lochet, Aude
• Hand, Carrol P.
• Ludsin, Stuart A.
• Marsden, J. Ellen
• Fryer, Brian J.

Titel

Discriminating natal origin of spawning adult sea lamprey (Petromyzon marinus) in Lake Champlain using statolith elemental signatures

Ist Teil von

• Journal of Great Lakes research, 2013-06, Vol.39 (2), p.239-246

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2013

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• Sea lamprey (Petromyzon marinus) is a nuisance species in the Great Lakes and Lake Champlain. Information about tributary contributions to the spawning adult phase is critical for appropriate allocation of efforts to control this species. We examined the accuracy of statolith elemental composition to identify the natal origin (i.e., individual rivers or clusters of rivers) of 33 known-origin adults from the Lake Champlain basin. To do so, we first established natal origin chemical signatures using the statoliths of 238 larvae from the same basin. Using laser-ablation inductively coupled plasma mass spectrometry, the 238 larvae originating from 12 streams and one delta were discriminated with a classification accuracy of 57% (range: 25–80%) and 70% (range: 29–80%) when individual streams and groups of streams were considered respectively, highlighting the potential of statolith microchemistry to identify natal origins. However, the assignment of natal origin for adults was overwhelmingly incorrect. Using a maximum likelihood procedure, 88% of the adults were assigned to a cluster of three streams and one delta, while only 3% of these individuals were known to originate from this particular cluster. More research is required to understand the low classification accuracy of sea lamprey adults and validate the use of statolith microchemistry to identify sea lamprey natal origin. ► Sea lamprey natal origin identification using statolith microchemistry was tested. ► Known-origin larvae, juveniles and adults from Lake Champlain basin were used. ► The accuracy of natal origin identification for larvae reached 70%. ► Natal origin identification for juveniles and adults was overwhelmingly incorrect. ► Variations of statolith chemistry over time might explain the observed discrepancy.