Skip to main content

Ontogenetic changes in vertical distribution of an endemic amphipod, Jesogammarus annandalei, in Lake Biwa, Japan

Buy Article:

$39.00 plus tax (Refund Policy)

Abstract:

We examined the seasonal variation in vertical distribution, gut fullness and diet of Jesogammarus annandalei, an endemic amphipod in Lake Biwa. The vertical distribution changed ontogenetically throughout the year and was restricted to depths with a water temperature < 12 °C. Newborn amphipods remained in the pelagic zone throughout the day while larger amphipods exhibited marked diurnal vertical migrations: individuals stayed on the lake bottom during the day and ascended to the pelagic zone at night. Gut fullness and contents of the migrating amphipods indicated that they fed upon plankton in the pelagic zone at night. Our results indicate that these migration patterns probably reduce the amphipod's predation risk from fish. As a result, J. annandalei may play an important role in the vertical translocation of material and energy in the Lake Biwa ecosystem.

Keywords: AMPHIPOD; DIEL VERTICAL MIGRATION; LAKE BIWA; ONTOGENETIC CHANGE; PELAGIC-BENTHIC COUPLING

Document Type: Research Article

DOI: http://dx.doi.org/10.1127/0003-9136/2005/0164-0465

Publication date: December 1, 2005

More about this publication?
schweiz/afh/2005/00000164/00000004/art00003
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more