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The roles of fertility, paternity an...

Craven, Kathryn Stephenson.

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The roles of fertility, paternity and yolk lipids in egg failure of the green sea turtle, Chelonia mydas.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	The roles of fertility, paternity and yolk lipids in egg failure of the green sea turtle, Chelonia mydas./
Author:	Craven, Kathryn Stephenson.
Description:	132 p.
Notes:	Chairs: David Wm. Owens; Duncan MacKenzie.
Contained By:	Dissertation Abstracts International62-07B.
Subject:	Biology, Animal Physiology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3020026
ISBN:	9780493312323

The roles of fertility, paternity and yolk lipids in egg failure of the green sea turtle, Chelonia mydas.
Craven, Kathryn Stephenson.

The roles of fertility, paternity and yolk lipids in egg failure of the green sea turtle, Chelonia mydas. - 132 p.

Chairs: David Wm. Owens; Duncan MacKenzie.

Thesis (Ph.D.)--Texas A&M University, 2001.

Three approaches were used to evaluate the causes of egg failure in a captive population of green sea turtles (Chelonia mydas). First, unhatched eggs were examined macroscopically to determine if infertility or embryonic death contributed to egg failure. Of all the full term eggs examined, 95% were fertile but contained an embryo that died during some stage of development. Embryonic death occurred most commonly prior to the second day of incubation. Next, gas liquid chromatography was used to determine the fatty acid profiles of both captive and wild yolk samples. Eggs from nests with poor hatch success had significantly lower levels of timnodonic and docosapentanoic acids, and higher levels of docosahexanoic acid when compared with the wild nests. Data also suggested that essential fatty acids needed for sea turtle development may differ from those known to be essential in mammals. I suspect that the n-3 fatty acids are essential in sea turtles. Finally, microsatellite markers were characterized in 21 nests from 16 different females in addition to all 85 males in the population to determine if multiple paternity influenced hatch success. Multiple paternity was found in 100% of clutches, but the number of fathers contributing to each nest was not related to the hatch success of that nest. The hatch success of individual females averaged over six nesting seasons, however, was significantly different based on the number of males contributing to the nest, the year the nest was laid and the geographic origin of the female. The data provided evidence for promiscuous mating behavior in male turtles, sperm storage in the oviduct, and higher levels of multiple paternity than reported in the wild. Embryonic death is the primary cause of egg failure in this captive population of green turtles. Fatty acid levels found in the yolk may be a contributing factor, but paternity seems to have no effect.

ISBN: 9780493312323Subjects--Topical Terms:

1017835
Biology, Animal Physiology.

The roles of fertility, paternity and yolk lipids in egg failure of the green sea turtle, Chelonia mydas.
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100 1 $a Craven, Kathryn Stephenson. $3 1277280
245 1 4 $a The roles of fertility, paternity and yolk lipids in egg failure of the green sea turtle, Chelonia mydas.
300 $a 132 p.
500 $a Chairs: David Wm. Owens; Duncan MacKenzie.
500 $a Source: Dissertation Abstracts International, Volume: 62-07, Section: B, page: 3105.
502 $a Thesis (Ph.D.)--Texas A&M University, 2001.
520 $a Three approaches were used to evaluate the causes of egg failure in a captive population of green sea turtles (Chelonia mydas). First, unhatched eggs were examined macroscopically to determine if infertility or embryonic death contributed to egg failure. Of all the full term eggs examined, 95% were fertile but contained an embryo that died during some stage of development. Embryonic death occurred most commonly prior to the second day of incubation. Next, gas liquid chromatography was used to determine the fatty acid profiles of both captive and wild yolk samples. Eggs from nests with poor hatch success had significantly lower levels of timnodonic and docosapentanoic acids, and higher levels of docosahexanoic acid when compared with the wild nests. Data also suggested that essential fatty acids needed for sea turtle development may differ from those known to be essential in mammals. I suspect that the n-3 fatty acids are essential in sea turtles. Finally, microsatellite markers were characterized in 21 nests from 16 different females in addition to all 85 males in the population to determine if multiple paternity influenced hatch success. Multiple paternity was found in 100% of clutches, but the number of fathers contributing to each nest was not related to the hatch success of that nest. The hatch success of individual females averaged over six nesting seasons, however, was significantly different based on the number of males contributing to the nest, the year the nest was laid and the geographic origin of the female. The data provided evidence for promiscuous mating behavior in male turtles, sperm storage in the oviduct, and higher levels of multiple paternity than reported in the wild. Embryonic death is the primary cause of egg failure in this captive population of green turtles. Fatty acid levels found in the yolk may be a contributing factor, but paternity seems to have no effect.
590 $a School code: 0803.
650 4 $a Biology, Animal Physiology. $3 1017835
650 4 $a Biology, Molecular. $3 1017719
650 4 $a Biology, Zoology. $3 1018632
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710 2 $a Texas A&M University. $3 718977
773 0 $t Dissertation Abstracts International $g 62-07B.
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790 1 0 $a MacKenzie, Duncan, $e advisor
790 1 0 $a Owens, David Wm., $e advisor
791 $a Ph.D.
792 $a 2001
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3020026