Reproductive Biology of Captive Green Sea TurtlesCheloniamydas

Wood, James R.; Wood, Fern E.

doi:10.1093/icb/20.3.499

Cited by 75 publications

(52 citation statements)

References 7 publications

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“…These differences reflect different sizes at maturity providing hawksbills essentially stop growing when maturity is reached as occurs in the green turtle (Chelonia mydas) (Carr and Goodman, 1970;Bjorndal, 1980;Wood and Wood, 1980). The hawksbill nests in many locations around the world, but reproductive data are scarce (Witzell, 1983).…”

Section: Introductionmentioning

confidence: 99%

Variation of Size at Maturity of Female Hawksbill Turtles (Eretmochelys imbricata), with Speculations on Life-History Tactics Relative to Proper Stock Management

Witzell

1985

Jpn.J.Herpetol.

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The mean nesting sizes, and subsequent reproductive rates, of Arabian Peninsula hawksbill turtles (Eretmochelys imbricata) are significantly smaller than other hawksbill populations.These differences can not presently be explained due to the lack of basic life history information and, consequently, resource managers are unable to realistically manage any hawksbill population. Research, although costly and time consuming, must be initiated to obtain the demographic data needed; age at maturity, sex ratios, mortality, recruitment, migratory patterns, nesting intervals, philopatry, and whether hatchlings return as adults to reproduce on their natal beaches.

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Section: Introductionmentioning

confidence: 99%

Variation of Size at Maturity of Female Hawksbill Turtles (Eretmochelys imbricata), with Speculations on Life-History Tactics Relative to Proper Stock Management

Witzell

1985

Jpn.J.Herpetol.

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“…For many species with TSD, the number of juveniles produced is directly related to the number of sexually mature females (female dominance phenomenon; see Basics of Population Dynamics, above). Moreover, no conclusive data exist concerning the minimum number of males necessary to successfully fertilize all females in reproductive condition in a population, although it is thought that small numbers of males may be a limiting factor of population dynamics for reproduction, based on observations of green turtles made in artificial conditions where the operational sex ratio was strongly biased (Wood and Wood 1980).…”

Section: Primary Sex Ratio Versus Operational Sex Ratio and Populatiomentioning

confidence: 99%

Temperature-Dependent Sex Determination in Vertebrates

Valenzuela¹,

Lance²

2018

Open Monographs

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“…Therefore, we inferred this period from known follicular development intervals of other sea turtles. Studies of captive green turtles indicate the first oviposition typically occurs ∼34-45 days after observed copulation (Simon et al, 1975;Wood and Wood, 1980); however, this interval may reach up to 60 days (Wood and Wood, 1980). The mating period for loggerhead sea turtles has been documented to last up to 42 days (Miller et al, 2003).…”

Section: Inference Of Matingmentioning

confidence: 99%

Pre-nesting Movements of Leatherback Sea Turtles, Dermochelys coriacea, in the Western Atlantic

Bond

James

2017

Front. Mar. Sci.

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Understanding high-use areas for highly migratory species and their movements within these areas may provide insight into behaviors such as foraging and mating. In the Western Atlantic, the leatherback sea turtle, Dermochelys coriacea, has a broad geographic range extending from nesting beaches at low latitudes to foraging areas off the coast of Eastern Canada. Biotelemetry has revealed much about the movements and habitats of leatherbacks. However, the timing and location of leatherback mating behavior remains unclear. We conducted spatial analyses of the movements of reproductive female leatherbacks prior to their first seasonal nesting events. Using kernel density estimates, high-use areas for seven female turtles originally tagged in Canadian waters were revealed from 50% volume contours depicting pre-nesting movements (120 days prior to confirmed nesting events) and inferred mating behavior (45 days prior to confirmed nesting events). All individuals initially remained offshore within a relatively small range of latitude (10-15 • N) before transiting to and residing in coastal waters adjacent to nesting beaches in Colombia (n = 2), Trinidad (n = 3), Guyana (n = 1), and French Guiana (n = 1). Comparison of these movement patterns to those of mature male leatherbacks (n = 12) revealed similarities. Male and female residency within this offshore high-use area may be indicative of prey exploitation prior to the energetically-costly nesting season. While the offshore residency period of three males and one female extended into the interval in which mating is expected to occur, most males and females transited to coastal waters where they resided throughout this period. High-use areas determined through kernel density analysis support and corroborate previous telemetry work indicating that mature male leatherbacks exhibit seasonal residency adjacent nesting beaches for the early portion of the nesting season, presumably to exploit mating opportunities. Fine-scale analyses of fisheries interactions in both coastal and offshore waters and estimation of accompanying mortality rates is required to evaluate fishery threats to this population during the pre-nesting interval.

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Reproductive Biology of Captive Green Sea TurtlesCheloniamydas

Cited by 75 publications

References 7 publications

Variation of Size at Maturity of Female Hawksbill Turtles (<i>Eretmochelys imbricata</i>), with Speculations on Life-History Tactics Relative to Proper Stock Management

Variation of Size at Maturity of Female Hawksbill Turtles (<i>Eretmochelys imbricata</i>), with Speculations on Life-History Tactics Relative to Proper Stock Management

Temperature-Dependent Sex Determination in Vertebrates

Pre-nesting Movements of Leatherback Sea Turtles, Dermochelys coriacea, in the Western Atlantic

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