BibTex RIS Cite

Temperature Profiles And Sex Ratio Estimation For Green Turtle Chelonia mydas Hatchlings On Sugözü Beaches

Year 2014, Volume: 42 Issue: 4, 531 - 536, 01.11.2014

Abstract

In this study, the effect of nest temperature and surrounding sand temperature on sexual differentiation were examined for green turtle Chelonia mydas hatchlings on Sugözü Beaches Adana, Turkey in 2005 nesting season. Nest temperatures were found to be higher than the surrounding sand temperatures, especially du- ring the middle and last third period of incubation respectively, 0.6°C and 1.9°C . The nest temperature was mostly related to the incubation duration and this was followed by the distance of the nest from the sea and the clutch size. Any relationship between nest temperature and nest depth was not found. Nest temperatures ranged between 29.4-31.6°C and middle third temperatures ranged between 29.5-31.3°C were measured above 28.9°C, which is the pivotal temperature. The sex ratio in green turtle hatchlings in the area investigated according to the temperature profile was prominently biased toward females.

References

  • J.J. Bull, Sex Determination in Reptiles. Q Rev Biol, (1980) 3.
  • C.L. Yntema, N. Mrosovsky, Sexual-Differentiation in Hatchling Loggerheads (Caretta-Caretta) Incubated at Different Controlled Temperatures. Herpetologica, 36,(1980) 33.
  • N. Mrosovsky, C. Pieau, Transitional range of temperature, pivotal temperatures and thermosensitive stages for sex determination in reptiles. Amphibia-Reptilia, 12 (1991) 169.
  • N. Mrosovsky, C.L. Yntema, Temperature-Dependence of Sexual-Differentiation in Sea Turtles - Implications for Conservation Practices. Biol Conserv 18, (1980) 271.
  • A.C. Broderick, B.J. Godley and G.C. Hays, Metabolic heating and the prediction of sex ratios for green turtles (Chelonia mydas). Physiol Biochem Zool, 74 (2001) 161.
  • B. Lazar, G. Lackovic, P. Casale, D. Freggi, N. Tvrtkovic, Histological validation of gonad gross morphology to sex juvenile loggerhead sea turtles (Caretta caretta). Herpetol J, 18 (2008) 137.
  • S.A. Ceriani and J. Wyneken, Comparative morphology and sex identification of the reproductive system in formalin-preserved sea turtle specimens. Zoology, 111 (2008) 179.
  • N. Mrosovsky, M. Benabib, An Assessment of 2 Methods of Sexing Hatchling Sea-Turtles. Copeia, 2 (1990) 589.
  • N. Mrosovsky, S.J. Kamel, C.E. Diez, R.P. van Dam, Methods of estimating natural sex ratios of sea turtles from incubation temperatures and laboratory data. Endanger Species Res, 8 (2009) 147.
  • E.A. Standora, J.R. Spotila, Temperature-Dependent Sex Determination in Sea Turtles. Copeia 3, (1985) 711.
  • N.T. Booth and K. Astill, Temperature variation within and between nests of the green sea turtle, Chelonia mydas (Chelonia :Cheloniidae) on Heron Island, Great Barrier Reef. Aust J Zool, 49 (2001) 71.
  • S.L. Milton, A.A. Schulman, P.L. Lutz, The effect of beach nourishment with aragonite versus silicate sand on beach temperature and loggerhead sea turtle nesting success. J Coastal Res, 13 (1997) 904.
  • Temperature-dependent sex determination of
  • Ascension Island green turtles. Mar Ecol Prog Ser, 226,(2002) 115.
  • D. T. Booth, C. Freeman, Sand and nest temperatures and an estimate of hatchling sex ratio from the Heron Island green turtle (Chelonia mydas) rookery, Southern Great Barrier Reef. Coral Reefs, 25 (2006) 629.
  • P. Casale, G. Gerosa and S.V. Yerli, Female-biased Primary Sex Ratio of the Green Turtle, Chelonia mydas, Estimated Through Sand Temperatures at Akyatan
  • Turkey. Zool Middle East, 20 (2000) 33.
  • M.H. Godfrey, Sex ratios of sea turtle hatchlings: direct and indirect estimates. Ph.D. Thesis, University of Toronto, Ottawa, 1997.
  • A.H. Ucar, Y. Kaska, S. Ergene, C. Aymak, Y. Kacar, A. Kaska, P. Ili, Sex Ratio Estimation of the Most Eastern Main Loggerhead Sea Turtle Nesting Site: Anamur Beach, Mersin, Turkey. Isr J Ecol Evol, 58 (2012) 87.
  • Y. Kaska, R. Downie, R. Tippett, R.W. Furness, Natural temperature regimes for loggerhead and green turtle nests in the eastern Mediterranean. Can J Zool, 76 (1998) 723.
  • A.C. Broderick, B.J. Godley, S. Reece and J.R. Downie, Incubation periods and sex ratios of green turtles: highly female biased hatchling production in the eastern Mediterranean. Mar Ecol Prog Ser, 202 (2000) 273.
  • M. Oz, A. Erdogan, Y. Kaska, S. Dusen, A. Aslan, H. Sert, M. Yavuz, M.R. Tunc, Nest temperatures and sex-ratio estimates of loggerhead turtles at Patara beach on the southwestern coast of Turkey. Can J Zool, 82 (2004) 94.
  • Y. Kaska, C. Ilgaz, A. Ozdemir, E. Baskale, O. Turkozan, I. Baran, M. Stachowitsch, Sex ratio estimations of loggerhead sea turtle hatchlings by histological examination and nest temperatures at Fethiye beach, Turkey. Naturwissenschaften, 93 (2006) 338.

Sugözü Kumsalları’ndaki̇ Sıcaklık Profilleri ve Yeşil Kaplumbağa Chelonia mydas Yavrularında Eşey Oranı Tahmini

Year 2014, Volume: 42 Issue: 4, 531 - 536, 01.11.2014

Abstract

B u çalışmada, 2005 yuvalama sezonunda Sugözü Kumsalları’ndaki Adana, Türkiye yuva ve çevresindeki kumsal sıcaklıklarının yeşil kaplumbağa Chelonia mydas yavrularındaki eşeysel farklılşmaya olan etkisi incelenmiştir. Yuva sıcaklıkları, özellikle gelişimin orta ve son trimesterinde sırasıyla 0.6°C ve 1.9°C yuvayı çevreleyen kumsal sıcaklıklarından yüksek bulunmuştur. Yuva sıcaklıkları en yüksek olarak inkübasyon süresi ile ilişkilidir, bunu yuvanın denizden uzaklığı ve kuluçka büyüklüğü izlemektedir. Yuva sıcaklığı ve yuva derinliği arasında bir ilişki bulunamamıştır. Yuva 29.4-31.6°C arasında ve orta trimester 29.5-31.3°C arasında sıcaklıkları 28.9°C olan pivotal sıcaklık derecesinin üzerinde ölçülmüştür. Sıcaklık profillerine gore, çalışma alanındaki yeşil kaplumbağa yavrularındaki cinsiyet oranı belirgin şekilde dişi yönlüdür

References

  • J.J. Bull, Sex Determination in Reptiles. Q Rev Biol, (1980) 3.
  • C.L. Yntema, N. Mrosovsky, Sexual-Differentiation in Hatchling Loggerheads (Caretta-Caretta) Incubated at Different Controlled Temperatures. Herpetologica, 36,(1980) 33.
  • N. Mrosovsky, C. Pieau, Transitional range of temperature, pivotal temperatures and thermosensitive stages for sex determination in reptiles. Amphibia-Reptilia, 12 (1991) 169.
  • N. Mrosovsky, C.L. Yntema, Temperature-Dependence of Sexual-Differentiation in Sea Turtles - Implications for Conservation Practices. Biol Conserv 18, (1980) 271.
  • A.C. Broderick, B.J. Godley and G.C. Hays, Metabolic heating and the prediction of sex ratios for green turtles (Chelonia mydas). Physiol Biochem Zool, 74 (2001) 161.
  • B. Lazar, G. Lackovic, P. Casale, D. Freggi, N. Tvrtkovic, Histological validation of gonad gross morphology to sex juvenile loggerhead sea turtles (Caretta caretta). Herpetol J, 18 (2008) 137.
  • S.A. Ceriani and J. Wyneken, Comparative morphology and sex identification of the reproductive system in formalin-preserved sea turtle specimens. Zoology, 111 (2008) 179.
  • N. Mrosovsky, M. Benabib, An Assessment of 2 Methods of Sexing Hatchling Sea-Turtles. Copeia, 2 (1990) 589.
  • N. Mrosovsky, S.J. Kamel, C.E. Diez, R.P. van Dam, Methods of estimating natural sex ratios of sea turtles from incubation temperatures and laboratory data. Endanger Species Res, 8 (2009) 147.
  • E.A. Standora, J.R. Spotila, Temperature-Dependent Sex Determination in Sea Turtles. Copeia 3, (1985) 711.
  • N.T. Booth and K. Astill, Temperature variation within and between nests of the green sea turtle, Chelonia mydas (Chelonia :Cheloniidae) on Heron Island, Great Barrier Reef. Aust J Zool, 49 (2001) 71.
  • S.L. Milton, A.A. Schulman, P.L. Lutz, The effect of beach nourishment with aragonite versus silicate sand on beach temperature and loggerhead sea turtle nesting success. J Coastal Res, 13 (1997) 904.
  • Temperature-dependent sex determination of
  • Ascension Island green turtles. Mar Ecol Prog Ser, 226,(2002) 115.
  • D. T. Booth, C. Freeman, Sand and nest temperatures and an estimate of hatchling sex ratio from the Heron Island green turtle (Chelonia mydas) rookery, Southern Great Barrier Reef. Coral Reefs, 25 (2006) 629.
  • P. Casale, G. Gerosa and S.V. Yerli, Female-biased Primary Sex Ratio of the Green Turtle, Chelonia mydas, Estimated Through Sand Temperatures at Akyatan
  • Turkey. Zool Middle East, 20 (2000) 33.
  • M.H. Godfrey, Sex ratios of sea turtle hatchlings: direct and indirect estimates. Ph.D. Thesis, University of Toronto, Ottawa, 1997.
  • A.H. Ucar, Y. Kaska, S. Ergene, C. Aymak, Y. Kacar, A. Kaska, P. Ili, Sex Ratio Estimation of the Most Eastern Main Loggerhead Sea Turtle Nesting Site: Anamur Beach, Mersin, Turkey. Isr J Ecol Evol, 58 (2012) 87.
  • Y. Kaska, R. Downie, R. Tippett, R.W. Furness, Natural temperature regimes for loggerhead and green turtle nests in the eastern Mediterranean. Can J Zool, 76 (1998) 723.
  • A.C. Broderick, B.J. Godley, S. Reece and J.R. Downie, Incubation periods and sex ratios of green turtles: highly female biased hatchling production in the eastern Mediterranean. Mar Ecol Prog Ser, 202 (2000) 273.
  • M. Oz, A. Erdogan, Y. Kaska, S. Dusen, A. Aslan, H. Sert, M. Yavuz, M.R. Tunc, Nest temperatures and sex-ratio estimates of loggerhead turtles at Patara beach on the southwestern coast of Turkey. Can J Zool, 82 (2004) 94.
  • Y. Kaska, C. Ilgaz, A. Ozdemir, E. Baskale, O. Turkozan, I. Baran, M. Stachowitsch, Sex ratio estimations of loggerhead sea turtle hatchlings by histological examination and nest temperatures at Fethiye beach, Turkey. Naturwissenschaften, 93 (2006) 338.
There are 23 citations in total.

Details

Primary Language English
Journal Section Research Article
Authors

Onur Candan This is me

Dürdane Kolankaya This is me

Publication Date November 1, 2014
Published in Issue Year 2014 Volume: 42 Issue: 4

Cite

APA Candan, O., & Kolankaya, D. (2014). Temperature Profiles And Sex Ratio Estimation For Green Turtle Chelonia mydas Hatchlings On Sugözü Beaches. Hacettepe Journal of Biology and Chemistry, 42(4), 531-536.
AMA Candan O, Kolankaya D. Temperature Profiles And Sex Ratio Estimation For Green Turtle Chelonia mydas Hatchlings On Sugözü Beaches. HJBC. November 2014;42(4):531-536.
Chicago Candan, Onur, and Dürdane Kolankaya. “Temperature Profiles And Sex Ratio Estimation For Green Turtle Chelonia Mydas Hatchlings On Sugözü Beaches”. Hacettepe Journal of Biology and Chemistry 42, no. 4 (November 2014): 531-36.
EndNote Candan O, Kolankaya D (November 1, 2014) Temperature Profiles And Sex Ratio Estimation For Green Turtle Chelonia mydas Hatchlings On Sugözü Beaches. Hacettepe Journal of Biology and Chemistry 42 4 531–536.
IEEE O. Candan and D. Kolankaya, “Temperature Profiles And Sex Ratio Estimation For Green Turtle Chelonia mydas Hatchlings On Sugözü Beaches”, HJBC, vol. 42, no. 4, pp. 531–536, 2014.
ISNAD Candan, Onur - Kolankaya, Dürdane. “Temperature Profiles And Sex Ratio Estimation For Green Turtle Chelonia Mydas Hatchlings On Sugözü Beaches”. Hacettepe Journal of Biology and Chemistry 42/4 (November 2014), 531-536.
JAMA Candan O, Kolankaya D. Temperature Profiles And Sex Ratio Estimation For Green Turtle Chelonia mydas Hatchlings On Sugözü Beaches. HJBC. 2014;42:531–536.
MLA Candan, Onur and Dürdane Kolankaya. “Temperature Profiles And Sex Ratio Estimation For Green Turtle Chelonia Mydas Hatchlings On Sugözü Beaches”. Hacettepe Journal of Biology and Chemistry, vol. 42, no. 4, 2014, pp. 531-6.
Vancouver Candan O, Kolankaya D. Temperature Profiles And Sex Ratio Estimation For Green Turtle Chelonia mydas Hatchlings On Sugözü Beaches. HJBC. 2014;42(4):531-6.

HACETTEPE JOURNAL OF BIOLOGY AND CHEMİSTRY

Copyright © Hacettepe University Faculty of Science

http://www.hjbc.hacettepe.edu.tr/

https://dergipark.org.tr/tr/pub/hjbc