Free-swimming speeds and behavior in adult Pacific Lamprey, Entosphenus tridentatus

AbstractThe brooding cycles of Hemichromis bimaculatus and Aequidens portalegrensis are very similar in timing except that the latter have a longer pit young stage. Exchanges of eggs or wrigglers between the two species resulted in ready acceptance of foreign young. Experienced as well as inexperienced pairs raised foreign spawn successfully in alternation with their own or were induced to brood mixed schools. Acceptance of eggs, wrigglers or free-swimming young was limited to those individuals, regardless of species, which matched in age and behavior the parents' brooding phase. Therefore, it is concluded that parent H. bimaculatus and A. portalegrensis are not imprinted on the species characteristic of their first or subsequent young. Instead, there appears to be an internal mechanism regulating the duration of the phases of parental care, that limits the responsiveness of the parents to particular stages of young.

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Occurrence of larval Pacific lamprey Entosphenus tridentatus from Japan, detected by random amplified polymorphic DNA (RAPD) analysis

Ichthyological Research ◽

10.1007/s10228-005-0276-4 ◽

2005 ◽

Vol 52 (3) ◽

pp. 297-301 ◽

Cited By ~ 10

Author(s):

Yuji Yamazaki ◽

Norio Fukutomi ◽

Norio Oda ◽

Koichi Shibukawa ◽

Yasuo Niimura ◽

...

Keyword(s):

Rapd Analysis ◽

Random Amplified Polymorphic Dna ◽

Pacific Lamprey ◽

Entosphenus Tridentatus

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Passage and Behavior of Radio-Tagged Adult Pacific Lampreys (Entosphenus tridentatus) at the Willamette Falls Project, Oregon

Northwest Science ◽

10.3955/046.084.0303 ◽

2010 ◽

Vol 84 (3) ◽

pp. 233-242 ◽

Cited By ~ 16

Author(s):

Matthew G. Mesa ◽

Robert J. Magie ◽

Elizabeth S. Copeland

Keyword(s):

Entosphenus Tridentatus ◽

And Behavior

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Using genetic pedigree reconstruction to estimate effective spawner abundance from redd surveys: an example involving Pacific lamprey (Entosphenus tridentatus)

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/cjfas-2016-0154 ◽

2017 ◽

Vol 74 (10) ◽

pp. 1646-1653 ◽

Cited By ~ 9

Author(s):

S.L. Whitlock ◽

L.D. Schultz ◽

C.B. Schreck ◽

J.E. Hess

Keyword(s):

Pedigree Reconstruction ◽

Spawning Ground ◽

Pacific Lamprey ◽

Entosphenus Tridentatus ◽

Mature Fish ◽

Survey Methodologies ◽

Sexually Mature ◽

Substantial Effort

Redd surveys are a commonly used technique for indexing the abundance of sexually mature fish in streams; however, substantial effort is often required to link redd counts to actual spawner abundance. In this study, we describe how genetic pedigree reconstruction can be used to estimate effective spawner abundance in a stream reach, using Pacific lamprey (Entosphenus tridentatus) as an example. Lamprey embryos were sampled from redds within a 2.5 km reach of the Luckiamute River, Oregon, USA. Embryos were found in only 20 of the 48 redds sampled (suggesting 58% false redds); however, multiple sets of parents were detected in 44% of the true redds. Estimates from pedigree reconstruction suggested that there were 0.48 (95% CI: 0.29–0.88) effective spawners per redd and revealed that individual lamprey contributed gametes to a minimum of between one and six redds, and in one case, spawned in patches that were separated by over 800 m. Our findings demonstrate the utility of pedigree reconstruction techniques for both inferring spawning-ground behaviors and providing useful information for refining lamprey redd survey methodologies.

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