SEAWARD DRIFT OF THE PONTIC SHAD LARVAE (ALOSA PONTICA) AND THE INFLUENCE OF DANUBE RIVER HYDROLOGY ON THEIR TRAVEL PATH THROUGH THE DANUBE DELTA SYSTEM.

The Pontic shad lives in the northwestern part of the Black Sea. It migrates in the Danube River for spawning. The larvae drift passively towards the sea when they reach the life stage ranging from pre-larvae to post-larvae. During the larval stage the Pontic shad is floating, mainly in the 0-5...

Full description

Bibliographic Details
Main Author: NAVODARU I.
Format: Article
Language:English
Published: EDP Sciences 2001-07-01
Series:Knowledge and Management of Aquatic Ecosystems
Subjects:
Online Access:http://dx.doi.org/10.1051/kmae:2001016
id doaj-f07afb31d4b241caab93201d61d4d680
record_format Article
spelling doaj-f07afb31d4b241caab93201d61d4d6802020-11-24T22:56:01ZengEDP SciencesKnowledge and Management of Aquatic Ecosystems1961-95022001-07-010362-36374976010.1051/kmae:2001016kmae2001362-36302SEAWARD DRIFT OF THE PONTIC SHAD LARVAE (ALOSA PONTICA) AND THE INFLUENCE OF DANUBE RIVER HYDROLOGY ON THEIR TRAVEL PATH THROUGH THE DANUBE DELTA SYSTEM.NAVODARU I. The Pontic shad lives in the northwestern part of the Black Sea. It migrates in the Danube River for spawning. The larvae drift passively towards the sea when they reach the life stage ranging from pre-larvae to post-larvae. During the larval stage the Pontic shad is floating, mainly in the 0-50 cm upper layer of river. Upstream of the Danube Delta, in the straight sector of the river, alosids are distributed mostly towards the middle of the river, where the water velocity is higher. In the curved section of the river, upstream of the location of the Danube River splitting in the delta’s branches, the water current is outwardly pushing the shad larvae to the right shore, the Romanian, respectively. Therefore, Tulcea branch (Romanian) takes over 60-80 % from the total of Danubian larvae, even its water flow is smaller (40 %) than Chilia branch (the border of Romania and Ukraine). The distribution of larvae at the splitting point influences the repartition of adult migratory catch, at return for spawning, between Saint George branch (Romania) and Chilia branch. Consequently, the topography and hydrology of the river at the splitting point of the branceh which form the delta decide on the distribution of larvae, and later, when the shads are homing on the same way for spawning the sharing catch between Romania and Ukraine. http://dx.doi.org/10.1051/kmae:2001016Pontic shadlarvaedriftingdistributionhomingDanube River
collection DOAJ
language English
format Article
sources DOAJ
author NAVODARU I.
spellingShingle NAVODARU I.
SEAWARD DRIFT OF THE PONTIC SHAD LARVAE (ALOSA PONTICA) AND THE INFLUENCE OF DANUBE RIVER HYDROLOGY ON THEIR TRAVEL PATH THROUGH THE DANUBE DELTA SYSTEM.
Knowledge and Management of Aquatic Ecosystems
Pontic shad
larvae
drifting
distribution
homing
Danube River
author_facet NAVODARU I.
author_sort NAVODARU I.
title SEAWARD DRIFT OF THE PONTIC SHAD LARVAE (ALOSA PONTICA) AND THE INFLUENCE OF DANUBE RIVER HYDROLOGY ON THEIR TRAVEL PATH THROUGH THE DANUBE DELTA SYSTEM.
title_short SEAWARD DRIFT OF THE PONTIC SHAD LARVAE (ALOSA PONTICA) AND THE INFLUENCE OF DANUBE RIVER HYDROLOGY ON THEIR TRAVEL PATH THROUGH THE DANUBE DELTA SYSTEM.
title_full SEAWARD DRIFT OF THE PONTIC SHAD LARVAE (ALOSA PONTICA) AND THE INFLUENCE OF DANUBE RIVER HYDROLOGY ON THEIR TRAVEL PATH THROUGH THE DANUBE DELTA SYSTEM.
title_fullStr SEAWARD DRIFT OF THE PONTIC SHAD LARVAE (ALOSA PONTICA) AND THE INFLUENCE OF DANUBE RIVER HYDROLOGY ON THEIR TRAVEL PATH THROUGH THE DANUBE DELTA SYSTEM.
title_full_unstemmed SEAWARD DRIFT OF THE PONTIC SHAD LARVAE (ALOSA PONTICA) AND THE INFLUENCE OF DANUBE RIVER HYDROLOGY ON THEIR TRAVEL PATH THROUGH THE DANUBE DELTA SYSTEM.
title_sort seaward drift of the pontic shad larvae (alosa pontica) and the influence of danube river hydrology on their travel path through the danube delta system.
publisher EDP Sciences
series Knowledge and Management of Aquatic Ecosystems
issn 1961-9502
publishDate 2001-07-01
description The Pontic shad lives in the northwestern part of the Black Sea. It migrates in the Danube River for spawning. The larvae drift passively towards the sea when they reach the life stage ranging from pre-larvae to post-larvae. During the larval stage the Pontic shad is floating, mainly in the 0-50 cm upper layer of river. Upstream of the Danube Delta, in the straight sector of the river, alosids are distributed mostly towards the middle of the river, where the water velocity is higher. In the curved section of the river, upstream of the location of the Danube River splitting in the delta’s branches, the water current is outwardly pushing the shad larvae to the right shore, the Romanian, respectively. Therefore, Tulcea branch (Romanian) takes over 60-80 % from the total of Danubian larvae, even its water flow is smaller (40 %) than Chilia branch (the border of Romania and Ukraine). The distribution of larvae at the splitting point influences the repartition of adult migratory catch, at return for spawning, between Saint George branch (Romania) and Chilia branch. Consequently, the topography and hydrology of the river at the splitting point of the branceh which form the delta decide on the distribution of larvae, and later, when the shads are homing on the same way for spawning the sharing catch between Romania and Ukraine.
topic Pontic shad
larvae
drifting
distribution
homing
Danube River
url http://dx.doi.org/10.1051/kmae:2001016
work_keys_str_mv AT navodarui seawarddriftoftheponticshadlarvaealosaponticaandtheinfluenceofdanuberiverhydrologyontheirtravelpaththroughthedanubedeltasystem
_version_ 1725655265756315648