caa a22 4500 606227318 CHVBK 20210128101157.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10641-015-0437-x doi (NATIONALLICENCE)springer-10.1007/s10641-015-0437-x Fecundity of the lampreys Lampetra hubbsi and Eudontomyzon hellenicus [Elektronische Daten] [Krystal Lapierre, Claude Renaud] This is the first report on the fecundity in adults of two nonparasitic lamprey species at risk, the Vulnerable Kern Brook Lamprey, Lampetra hubbsi and the Critically Endangered Macedonia Brook Lamprey, Eudontomyzon hellenicus. The mean absolute fecundity of L. hubbsi was 1865 eggs and that of E. hellenicus was 994. The higher fecundity in L. hubbsi was directly related to its higher mean gonadal mass (0.90g) relative to that in E. hellenicus (0.52g). Based on preserved museum material possessing well-developed primary and secondary sexual characters, the spawning period for L. hubbsi was inferred to be February-March and for E. hellenicus to either extend from January to May or to occur as separate events; one in January and the other in May. Because metamorphosing ammocoetes of E. hellenicus have been collected in October and in January, it is hypothesized that those metamorphosing in October spawn in January and those metamorphosing in January spawn in May. These periods need to be corroborated with field observations. Evidence for E. hellenicus spawning in January is based on the presence of spent females of this species collected in that month. Springer Science+Business Media Dordrecht, 2015 Lampetra hubbsi nationallicence Eudontomyzon hellenicus nationallicence Fecundity nationallicence Nonparasitic lampreys nationallicence Lapierre Krystal 301-6211 Cote-St-Luc Rd., H3X 2H2, Hampstead, QC, Canada aut Renaud Claude Research & Collections, Canadian Museum of Nature, Station D, P.O. Box: 3443, K1P 6P4, Ottawa, ON, Canada aut Environmental Biology of Fishes Springer Netherlands 98/12(2015-12-01), 2315-2320 0378-1909 98:12<2315 2015 98 10641 https://doi.org/10.1007/s10641-015-0437-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 brief-communication jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10641-015-0437-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lapierre Krystal 301-6211 Cote-St-Luc Rd., H3X 2H2, Hampstead, QC, Canada aut NATIONALLICENCE 700 1- Renaud Claude Research & Collections, Canadian Museum of Nature, Station D, P.O. Box: 3443, K1P 6P4, Ottawa, ON, Canada aut NATIONALLICENCE 773 0- Environmental Biology of Fishes Springer Netherlands 98/12(2015-12-01), 2315-2320 0378-1909 98:12<2315 2015 98 10641