Residency and migratory behaviour by adult Pomatomus saltatrix in a South African coastal embayment

Acoustic telemetry was used to study patterns of habitat use and movements of Pomatomus saltatrix L. (common name elf/shad/bluefish/tailor) within the Saldanha Bay with Langebaan Lagoon coastal embayment on the west coast of South Africa. Thirty six mature P. saltatrix were tagged with acoustic tran...

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Vydáno v:Estuarine, coastal and shelf science Ročník 89; číslo 1; s. 12 - 20
Hlavní autoři: Hedger, R.D., Næsje, T.F., Cowley, P.D., Thorstad, E.B., Attwood, C., Økland, F., Wilke, C.G., Kerwath, S.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Kidlington Elsevier Ltd 01.09.2010
Elsevier
Témata:
Acoustics
Agnatha. Pisces
Animal and plant ecology
Animal, plant and microbial ecology
Biological and medical sciences
Brackish
Brackish water ecosystems
Coastal
Coastal environments
Ebb tides
Fundamental and applied biological sciences. Psychology
Hydrophones
Lagoons
local movements
Migration
migrations
Movements
Pomatomus saltatrix
South Africa
Synecology
Telemetry
Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
South Africa
Africa
local movements
South Africa
telemetry
migrations
Pomatomus saltatrix
Marine environment
Brackish water environment
Vertebrata
Range finding
Migratory
Pisces
Migration
ISSN:0272-7714, 1096-0015
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Shrnutí:Acoustic telemetry was used to study patterns of habitat use and movements of Pomatomus saltatrix L. (common name elf/shad/bluefish/tailor) within the Saldanha Bay with Langebaan Lagoon coastal embayment on the west coast of South Africa. Thirty six mature P. saltatrix were tagged with acoustic transmitters and released within the lagoon in May 2006 and November–December 2007, and their positions were monitored until late-November 2008 using 28 hydrophones positioned throughout the embayment. The detection pattern of P. saltatrix suggested a tendency to residence within the embayment throughout the thirty month long study period, with nearly 60% of released individuals only being detected within the lagoon in the inner part of the embayment. However, there was a long-term trend of movement from the lagoon into the bay. One individual was recaptured off the east coast of South Africa 21 months after being tagged, 1760 km away, suggesting that P. saltatrix are capable of undertaking long along-shore migrations. Over finer scales within the inner lagoon, P. saltatrix ground speed increased (1) with an increase in tidal current speed, (2) with an increase in photoperiod, and (3) during day. Pomatomus saltatrix tended to move seaward during ebb tides, and to occupy greater depths during day.
Bibliografie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0272-7714
1096-0015
DOI:10.1016/j.ecss.2010.04.013