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Evaluating the role of shallow habit...

Brewer, Shannon K.

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Evaluating the role of shallow habitats to the spawning success of fish species in the Marais des Cygnes River (Missouri).

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Evaluating the role of shallow habitats to the spawning success of fish species in the Marais des Cygnes River (Missouri)./
作者:	Brewer, Shannon K.
面頁冊數:	150 p.
附註:	Source: Masters Abstracts International, Volume: 43-01, page: 0126.
Contained By:	Masters Abstracts International43-01.
標題:	Agriculture, Fisheries and Aquaculture. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1421119
ISBN:	0496258648

Evaluating the role of shallow habitats to the spawning success of fish species in the Marais des Cygnes River (Missouri).
Brewer, Shannon K.

Evaluating the role of shallow habitats to the spawning success of fish species in the Marais des Cygnes River (Missouri). - 150 p.

Source: Masters Abstracts International, Volume: 43-01, page: 0126.

Thesis (M.S.)--University of Missouri - Columbia, 2004.

The Marais des Cygnes River flows out of eastern Kansas and is being considered by the state of Kansas for additional flow management. Especially affected by alterations in flow would be the shallow-water habitats used by a variety of fishes for spawning and as a nursery for young fishes. This study emphasized linking reproductive timing and nursery periods to microhabitat use in shallow-water habitats. Additionally, I compared methods for evaluating spawning chronologies (gonadosomatic index and histology) and contrasted seasonal and diel shifts in habitat use.

ISBN: 0496258648Subjects--Topical Terms:

1020913
Agriculture, Fisheries and Aquaculture.

Evaluating the role of shallow habitats to the spawning success of fish species in the Marais des Cygnes River (Missouri).
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520 $a The Marais des Cygnes River flows out of eastern Kansas and is being considered by the state of Kansas for additional flow management. Especially affected by alterations in flow would be the shallow-water habitats used by a variety of fishes for spawning and as a nursery for young fishes. This study emphasized linking reproductive timing and nursery periods to microhabitat use in shallow-water habitats. Additionally, I compared methods for evaluating spawning chronologies (gonadosomatic index and histology) and contrasted seasonal and diel shifts in habitat use.
520 $a Hydraulic variables contributed the most to microhabitat models created for spawning fishes. Histology was a more precise method than gonadosomatic index in identifying the spawning chronology of fishes. Factors contributing to the strength of this method included temporal variation in reproduction, asynchronous ovarian development, and movement of fishes between habitats. Most seasonal shifts were associated with spawning and post-spawning periods, preparation for overwintering, and ontogenetic shifts in habitat use. Diel shifts in habitat use were primarily associated with changes in use of depth associated with nocturnal-feeding activities, the thermal instability of shallow-edge habitats during the day, post-larval drift, and migration to deeper-water habitats at night.
520 $a Instream-flow management for fishes needs to evolve beyond protecting those habitat types of elements where fishes are found to protecting habitats that are critical to the completion of the life cycle at the appropriate time of year. Assurance of shallow-water habitat protection for all life stages and species that comprise the fish community will not be an easy task for fisheries managers; the most hopeful solution will be to maintain the persistence and habitat complexity within these reaches by establishing appropriate guidelines for instream flows.
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