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Homing and migratory behavior of Ame...

Parker, Steven J.

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Homing and migratory behavior of American eels in a tidal environment.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Homing and migratory behavior of American eels in a tidal environment./
Author:	Parker, Steven J.
Description:	118 p.
Notes:	Source: Dissertation Abstracts International, Volume: 56-06, Section: B, page: 3083.
Contained By:	Dissertation Abstracts International56-06B.
Subject:	Biology, Zoology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9533878

Homing and migratory behavior of American eels in a tidal environment.
Parker, Steven J.

Homing and migratory behavior of American eels in a tidal environment. - 118 p.

Source: Dissertation Abstracts International, Volume: 56-06, Section: B, page: 3083.

Thesis (Ph.D.)--The University of Maine, 1995.

Behavior during homing movements of yellow-phase (sub-adult) and during migration of silver-phase (adult) American eels, Anguilla rostrata (Lesueur), in a tidal estuary was observed using continuous ultrasonic telemetry. Yellow eels were displaced 10-17 km between tidal fresh water and salinity-stratified water, and followed to determine the degree of home site fidelity and whether the eels use tidal currents as a transport mechanism. Silver eels were tracked during their downstream migration from tidal fresh water to coastal waters to describe their behavior in an estuarine environment. Twenty-eight eels were tracked continuously (eight eels displaced up the estuary, eight down the estuary, five controls and seven silver-phase) in the Penobscot River estuary, Maine, USA, for 4-92 h each. Nine of the 16 displaced yellow-phase eels (56%) returned to their capture sites either during the track or shortly afterwards. Control tracks provided a home-range estimate of 6.7 Subjects--Topical Terms:

1018632
Biology, Zoology.

Homing and migratory behavior of American eels in a tidal environment.
LDR:03124nmm 2200253 4500 001 1835822
005 20080107105526.5
008 130610s1995 eng d
035 $a (UMI)AAI9533878
035 $a AAI9533878
040 $a UMI $c UMI
100 1 $a Parker, Steven J. $3 1924444
245 1 0 $a Homing and migratory behavior of American eels in a tidal environment.
300 $a 118 p.
500 $a Source: Dissertation Abstracts International, Volume: 56-06, Section: B, page: 3083.
500 $a Adviser: James D. McCleave.
502 $a Thesis (Ph.D.)--The University of Maine, 1995.
520 $a Behavior during homing movements of yellow-phase (sub-adult) and during migration of silver-phase (adult) American eels, Anguilla rostrata (Lesueur), in a tidal estuary was observed using continuous ultrasonic telemetry. Yellow eels were displaced 10-17 km between tidal fresh water and salinity-stratified water, and followed to determine the degree of home site fidelity and whether the eels use tidal currents as a transport mechanism. Silver eels were tracked during their downstream migration from tidal fresh water to coastal waters to describe their behavior in an estuarine environment. Twenty-eight eels were tracked continuously (eight eels displaced up the estuary, eight down the estuary, five controls and seven silver-phase) in the Penobscot River estuary, Maine, USA, for 4-92 h each. Nine of the 16 displaced yellow-phase eels (56%) returned to their capture sites either during the track or shortly afterwards. Control tracks provided a home-range estimate of 6.7 $\ pm $ 3.6 km of estuary or 325 $\ pm $ 143 ha (mean $\ pm $ SD). All the eels used tidal currents as a transport mechanism and possibly as a means of orienting or being guided in an appropriate direction. Yellow eels displaced up the estuary and migrating silver-phase eels moved mostly during ebbing tides at night, whereas yellow-phase eels displaced down the estuary moved mainly during flooding tides both day and night. However, they were not precise in timing their movements to maximize transport on each tide. The eels tended to drift with the current or to swim slowly with the current, possibly to compensate for negative buoyancy. They were at or near the surface during most of their movements and made frequent dives, ascending and descending at the same rate of 0.12 $\ pm $ 0.04 m s $\ sp{-1} $ (0.18 $\ pm $ 0.06 body lengths s $\ sp{-1}). $ Silver-phase eels immediately adopted selective tidal stream transport behavior upon release into tidal fresh water and progressed down the estuary. Their behavior did not change when they encountered saline water and they progressed within a few days to coastal regions where salinities reached more than 28 $\ perthous. $ This study demonstrated that both yellow- and silver-phase eels use selective tidal stream transport during their movements in tidal habitats.
590 $a School code: 0113.
650 4 $a Biology, Zoology. $3 1018632
690 $a 0472
710 2 $a The University of Maine. $3 1029373
773 0 $t Dissertation Abstracts International $g 56-06B.
790 1 0 $a McCleave, James D., $e advisor
790 $a 0113
791 $a Ph.D.
792 $a 1995
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9533878