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Maternal transfer of metals in live-...

Cazan, Alfy Morales.

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Maternal transfer of metals in live-bearing fish (Cyprinodontiformes: Poeciliinae).

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Maternal transfer of metals in live-bearing fish (Cyprinodontiformes: Poeciliinae)./
作者:	Cazan, Alfy Morales.
面頁冊數:	149 p.
附註:	Source: Dissertation Abstracts International, Volume: 75-09(E), Section: B.
Contained By:	Dissertation Abstracts International75-09B(E).
標題:	Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3622929
ISBN:	9781303950773

Maternal transfer of metals in live-bearing fish (Cyprinodontiformes: Poeciliinae).
Cazan, Alfy Morales.

Maternal transfer of metals in live-bearing fish (Cyprinodontiformes: Poeciliinae). - 149 p.

Source: Dissertation Abstracts International, Volume: 75-09(E), Section: B.

Thesis (Ph.D.)--University of Louisiana at Lafayette, 2014.

This item must not be sold to any third party vendors.

This study assessed the occurrence and impacts of maternal metal transfer in live-bearing fish. The occurrence was investigated in two different species (Gambusia affinisand Heterandria formosa), while the impacts were studied only in G. affinis. Occurrence and impacts were addressed by exposing gravid females for 10 days to 0.15 muM of copper or cadmium, transferring the fish to clean water, monitoring their reproduction and collecting newborn offspring for further analyses of their health and reproductive success.

ISBN: 9781303950773Subjects--Topical Terms:

516476
Ecology.

Maternal transfer of metals in live-bearing fish (Cyprinodontiformes: Poeciliinae).
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245 1 0 $a Maternal transfer of metals in live-bearing fish (Cyprinodontiformes: Poeciliinae).
300 $a 149 p.
500 $a Source: Dissertation Abstracts International, Volume: 75-09(E), Section: B.
500 $a Adviser: Paul L. Klerks.
502 $a Thesis (Ph.D.)--University of Louisiana at Lafayette, 2014.
506 $a This item must not be sold to any third party vendors.
520 $a This study assessed the occurrence and impacts of maternal metal transfer in live-bearing fish. The occurrence was investigated in two different species (Gambusia affinisand Heterandria formosa), while the impacts were studied only in G. affinis. Occurrence and impacts were addressed by exposing gravid females for 10 days to 0.15 muM of copper or cadmium, transferring the fish to clean water, monitoring their reproduction and collecting newborn offspring for further analyses of their health and reproductive success.
520 $a Maternal transfer of copper and cadmium occured in both study species. Metal levels decreased in subsequent broods and in broods born later after a female's exposure. Metal exposure impacted the reproductive success of exposed-females; effects included smaller broods and more broods were aborted broods or contained dead offspring. Many effects remained for second broods developing well after the exposure.
520 $a The maternal metal exposure also impacted the offspring's health. Newborn offspring were smaller at birth, had reduced calcium levels, had a lowered metal tolerance, and had cellular membrane damage. When these offspring grew up, they had an increased rate of malformations, a smaller size at sexual maturity, increased gestation time and fewer broods. In spite of the impacts on life history parameters found in the laboratory, effects on population dynamics were very limited for greenhouse mesocosm populations established with the offspring of exposed females.
520 $a Effects for the essential metal (copper) and the nonessential metal (cadmium) were generally similar. A few effects, like those on body size, were evident for copper but not for cadmium. However, several of the more severe impacts, like the increase in malformations and reductions in the number of broods, were greatest for the offspring of the cadmium-exposed females.
520 $a This is the first report demonstrating negative impacts resulting from a short-term maternal metal exposure in live-bearing fishes. Effects were evident not just for reproduction of exposed-females but also for their offspring's health and reproduction. The latter continued beyond the offspring that were developing during exposure. This study demonstrated that the internal development in live-bearing fish may not spare the developing young from impacts caused by a metal-contaminated environment.
590 $a School code: 1363.
650 4 $a Ecology. $3 516476
650 4 $a Biology. $3 522710
650 4 $a Animal sciences. $3 3174829
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690 $a 0306
690 $a 0475
710 2 $a University of Louisiana at Lafayette. $b Biology. $3 3175845
773 0 $t Dissertation Abstracts International $g 75-09B(E).
790 $a 1363
791 $a Ph.D.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3622929