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Yeşil Deniz Kaplumbağası (Chelonia mydas) Yavrularının Büyüklüğü için Indikatör Olarak Bazı Yuva Özelliklerinin Kullanılmasıyla İlgili Bir Ön Çalışma

Year 2017, , 60 - 67, 08.12.2017

Bektaş Sönmez , Şükran Yalçın Özdılek

https://doi.org/10.17776/csj.363298

Abstract

Vücut büyüklüğü, deniz kaplumbağası yavrularının
hayatta kalma şansını artırabilir veya azaltabilir. Deniz kaplumbağası
yavrusunun hayatta kalabilirliği için vücut büyüklüğünün önemi göz önüne
alındığında, indikatör kullanılarak, yavru büyüklüğünün tahmin edilmesi koruma
uzmanları için yararlı bir yöntem olacaktır. Türkiye'de Chelonia mydas popülasyonunda, yavru büyüklüğü için indikatör olup
olmayacaklarını belirlemek amacıyla, yumurta sayısı, yuvanın denize olan
uzaklığı, kuluçka süresi ve yuva derinliği gibi bazı yuva özellikleri yavru
büyüklüğü ile korelasyona tabi tutuldu. Bulgularımız, bu yuva özelliklerinden
hiçbirinin yavru büyüklüğünü tahmin etmek için uygun olmadığını göstermiştir.
Ancak, kuluçka süresi, yavrunun düz karapas boyu ile zayıf bir korelasyon
göstermiştir. Kollinear yuva özelliklerinden türetilen ana bileşenlerin (AB),
yavru büyüklüğüne en iyi uyan doğrusal modeli oluşturulduğu zaman, model yavru
büyüklüğündeki varyansın sadece % 19.75'ini açıkladı. AB2'nin doğru karapas
boyu (DKB) üzerinde anlamlı bir etkisi vardı ve AB1 ile AB2 arasındaki
etkileşim, tek değişkenli analizde DKB ve eğri karapas boyu (EKB) üzerinde
belirgin etkilere sahipti. F-test sonuçları, modellerin belirgin öngörü
yeteneğinin olmadığını önermektedir. Belki de, araştırılmayan diğer faktörler
indikatör olarak daha uygun olabilir veya yavru büyüklüğü, indikatör olarak
kullanılabilir ancak tespiti yapılamayan bir kaç temel faktör gibi çeşitli
faktörler arasındaki karmaşık bir etkileşimden etkileniyordur.

Keywords

Chelonia mydas Yavru Büyüklüğü Yavru Morfolojisi Yuva özellikleri Samandağ

References

  • [1]. Glen F., Broderick A.C., Godley B.J., Hays G.C. Incubation environment affects phenotype of naturally incubated green turtle hatchlings. Journal of the Marine Biological Association of the United Kingdom, 2003; 83: 1183-1186.
  • [2]. Burgess E.A., Booth D.T., Lanyon J.M. Swimming performance of hatchling green turtles is affected by incubation temperature. Coral Reefs, 2006; 25: 341-349. doi: 10.1007/s00338-006-0116-7
  • [3]. Booth D.T., Burgess E., McCosker J., Lanyon J.M. The influence of incubation temperature on post-hatching fitness characteristics of turtles. International Congress Series, 2004; 1275: 226-233. doi: 10.1016/j.ics.2004.08.057
  • [4]. Booth D.T. Influence of incubation temperature on hatchling phenotype in reptiles. Physiological and Biochemical Zoology, 2006; 79: 274-281. doi: 10.1086/499988
  • [5]. Sönmez B., Turan C., Yalçın-Özdilek Ş. The effect of relocation on the morphology of green turtle, Chelonia mydas (Linnaeus, 1758), hatchlings on Samandağ beach, Turkey. Zoology in the Middle East, 2011; 52: 29-38. doi: 10.1080/09397140.2011.10638476
  • [6]. Heink U. and Kowarik I. What are indicators ? On the definition of indicators in ecology and environmental planning. Ecological Indicators, 2010; 10: 584–593. doi: 10.1016/j.ecolind.2009.09.009
  • [7]. Niemeijer D. and de Groot R.S. A conceptual framework for selecting environmental indicator sets. Ecological Indicators, 2008; 8: 14–25. doi: 10.1016/j.ecolind.2006.11.012
  • [8]. Packard G.C. and Packard M.J. The physiological ecology of reptilian eggs and embryos. In: Gans, C. and Huey, R.B (eds), Biology of the Reptilia, Volume 16, (pp 524 - 605). Alan R. Liss. Press, 1988.
  • [9]. Candan O. and Kolankaya D. Sex ratio of green turtle (Chelonia mydas) hatchlings at Sugözü, Turkey: higher accuracy with pivotal incubation duration. Chelonian Conserv. Biol., 15 (2016), pp. 102-108.
  • [10]. Kılıç Ç and Candan O. Hatchling sex ratio, body weight and nest parameters for Chelonia mydas nesting on Sugözü beaches (Turkey) Anim. Biodivers. Conserv., 37 (2014), pp. 177-182
  • [11]. Özdemir, B. & Türkozan, O. Hatching success of original and hatchery nests of the green turtle, Chelonia mydas, in Northern Cyprus. Turkish Journal of Zoology, 2006; 30: 377-381.
  • [12]. Booth D.T., Feeney R., Shibata Y. Nest and maternal origin can influence morphology and locomotor performance of hatchling green turtles (Chelonia mydas) incubated in field nests. Marine Biology, 2013; 160: 127-137. doi: 10.1007/s00227-012-2070-y
  • [13]. Broderick A.C., Glen F., Godley B.J., Hays G.C. Estimating the number green and loggerhead turtles nesting annually in the Mediterranean. Oryx, 2002; 36: 227-235. doi: 10.1017/S0030605302000431
  • [14]. Wang Y., Naumann U., Wright S.T., Warton D.I. Mvabund - an R Package for model-based analysis of multivariate abundance data. Methods in Ecology and Evolution, 2012; 3: 471-474. doi: 10.1111/j.2041-210X.2012.00190.x
  • [15]. Horne C.R., Fuller W.J., Godley B.J., Rhodes K.A., Snape R., Stokes K.L., Broderick A.C. The effect of thermal variance on the phenotype of marine turtle offspring. Physiological and Biochemical Zoology, 2014; 87: 796–804. doi: 10.1086/678238
  • [16]. Godley, B.J., Broderick, A.C., Downie, J.R., Glen, F., Houghton, J.D., Kirkwood, I., Reece, S., Hays, G.C. Thermal conditions in nests of loggerhead turtles: Further evidence suggesting female skewed sex ratios of hatchling production in the Mediterranean. Journal of Experimental Marine Biology and Ecology, 2001; 263: 45-63. doi: 10.1016/S0022-0981(01)00269-6
  • [17]. Mickelson L.E. & Downie J.R. Influence of incubation temperature on morphology and locomotion performance of leatherback (Dermochelys coriacea) hatchlings. Canadian Journal of Zoology, 2010; 88: 359-368. doi: 10.1139/Z10-007
  • [18]. Packard G.C., Paukstis G.L., Boardman T.J., Gutzke W.H.N. Daily and seasonal variation in hydric conditions and temperature inside nests of common snapping turtles (Chelydra serpentina). Canadian Journal of Zoology, 1985; 63: 2422-2429. doi: 10.1139/z85-358
  • [19]. Delmas V., Bonnet X., Girondot M., Prévot-Julliard A.C. Varying hydric conditions during incubation influence egg water exchange and hatchling phenotype in the red-eared slider turtle. Physiological and Biochemical Zoology, 2008; 81:(3) 345–55. doi: 10.1086/529459
  • [20]. Mcgehee M.A. Effects of moisture on eggs and hatchlings of loggerhead sea turtles (Caretta caretta). Herpetologica, 1990; 46: 251-258.

A Preliminary Study of Using Some Nest Characteristics as Indicators for the Size of Green Turtle (Chelonia mydas) Hatchlings

Year 2017, , 60 - 67, 08.12.2017

Bektaş Sönmez , Şükran Yalçın Özdılek

https://doi.org/10.17776/csj.363298

Abstract

Body size can increase or decrease the chances of survival of
sea turtle hatchlings. Given the importance of body size for hatchling
survival, it would be useful method for conservationists to be able to
estimate, using indicators, hatchling size quickly without having to disturb
hatchlings. Some nest characteristics such as clutch size, distance of the nest
from the sea, incubation period and nest depth were tested for correlations
with hatchling size in a population of Chelonia
mydas in Turkey to determine if they can be indicators for hatchling size.
Our results showed that none of these nest characteristics were suitable.
However; incubation period showed weakly correlated with straight carapace
size.When the best fitting linear model of the effect of principal components
(PCs), derived from collinear nest characteristics, on hatchling size was
constructed, the model only explained 19.75 % of the variance in hatchling
size. PC2 had a significant effect on straight carapace length (SCL) and the
interaction between PC1 and PC2 had significant effects on SCL and curved
carapace length (CCL) in the univariate analysis. F-test results that suggested
the models had not significant predictive capabilities. Perhaps there may be
other factors that are more suitable as indicators, or that hatchling size is
influenced by a complex interplay among several factors, such that it is not
possible to identify a few key factors to be used as indicators.

Keywords

Chelonia mydas Hatchling Size Hatchling Morphometrics Nest Characteristics Samandağ

References

  • [1]. Glen F., Broderick A.C., Godley B.J., Hays G.C. Incubation environment affects phenotype of naturally incubated green turtle hatchlings. Journal of the Marine Biological Association of the United Kingdom, 2003; 83: 1183-1186.
  • [2]. Burgess E.A., Booth D.T., Lanyon J.M. Swimming performance of hatchling green turtles is affected by incubation temperature. Coral Reefs, 2006; 25: 341-349. doi: 10.1007/s00338-006-0116-7
  • [3]. Booth D.T., Burgess E., McCosker J., Lanyon J.M. The influence of incubation temperature on post-hatching fitness characteristics of turtles. International Congress Series, 2004; 1275: 226-233. doi: 10.1016/j.ics.2004.08.057
  • [4]. Booth D.T. Influence of incubation temperature on hatchling phenotype in reptiles. Physiological and Biochemical Zoology, 2006; 79: 274-281. doi: 10.1086/499988
  • [5]. Sönmez B., Turan C., Yalçın-Özdilek Ş. The effect of relocation on the morphology of green turtle, Chelonia mydas (Linnaeus, 1758), hatchlings on Samandağ beach, Turkey. Zoology in the Middle East, 2011; 52: 29-38. doi: 10.1080/09397140.2011.10638476
  • [6]. Heink U. and Kowarik I. What are indicators ? On the definition of indicators in ecology and environmental planning. Ecological Indicators, 2010; 10: 584–593. doi: 10.1016/j.ecolind.2009.09.009
  • [7]. Niemeijer D. and de Groot R.S. A conceptual framework for selecting environmental indicator sets. Ecological Indicators, 2008; 8: 14–25. doi: 10.1016/j.ecolind.2006.11.012
  • [8]. Packard G.C. and Packard M.J. The physiological ecology of reptilian eggs and embryos. In: Gans, C. and Huey, R.B (eds), Biology of the Reptilia, Volume 16, (pp 524 - 605). Alan R. Liss. Press, 1988.
  • [9]. Candan O. and Kolankaya D. Sex ratio of green turtle (Chelonia mydas) hatchlings at Sugözü, Turkey: higher accuracy with pivotal incubation duration. Chelonian Conserv. Biol., 15 (2016), pp. 102-108.
  • [10]. Kılıç Ç and Candan O. Hatchling sex ratio, body weight and nest parameters for Chelonia mydas nesting on Sugözü beaches (Turkey) Anim. Biodivers. Conserv., 37 (2014), pp. 177-182
  • [11]. Özdemir, B. & Türkozan, O. Hatching success of original and hatchery nests of the green turtle, Chelonia mydas, in Northern Cyprus. Turkish Journal of Zoology, 2006; 30: 377-381.
  • [12]. Booth D.T., Feeney R., Shibata Y. Nest and maternal origin can influence morphology and locomotor performance of hatchling green turtles (Chelonia mydas) incubated in field nests. Marine Biology, 2013; 160: 127-137. doi: 10.1007/s00227-012-2070-y
  • [13]. Broderick A.C., Glen F., Godley B.J., Hays G.C. Estimating the number green and loggerhead turtles nesting annually in the Mediterranean. Oryx, 2002; 36: 227-235. doi: 10.1017/S0030605302000431
  • [14]. Wang Y., Naumann U., Wright S.T., Warton D.I. Mvabund - an R Package for model-based analysis of multivariate abundance data. Methods in Ecology and Evolution, 2012; 3: 471-474. doi: 10.1111/j.2041-210X.2012.00190.x
  • [15]. Horne C.R., Fuller W.J., Godley B.J., Rhodes K.A., Snape R., Stokes K.L., Broderick A.C. The effect of thermal variance on the phenotype of marine turtle offspring. Physiological and Biochemical Zoology, 2014; 87: 796–804. doi: 10.1086/678238
  • [16]. Godley, B.J., Broderick, A.C., Downie, J.R., Glen, F., Houghton, J.D., Kirkwood, I., Reece, S., Hays, G.C. Thermal conditions in nests of loggerhead turtles: Further evidence suggesting female skewed sex ratios of hatchling production in the Mediterranean. Journal of Experimental Marine Biology and Ecology, 2001; 263: 45-63. doi: 10.1016/S0022-0981(01)00269-6
  • [17]. Mickelson L.E. & Downie J.R. Influence of incubation temperature on morphology and locomotion performance of leatherback (Dermochelys coriacea) hatchlings. Canadian Journal of Zoology, 2010; 88: 359-368. doi: 10.1139/Z10-007
  • [18]. Packard G.C., Paukstis G.L., Boardman T.J., Gutzke W.H.N. Daily and seasonal variation in hydric conditions and temperature inside nests of common snapping turtles (Chelydra serpentina). Canadian Journal of Zoology, 1985; 63: 2422-2429. doi: 10.1139/z85-358
  • [19]. Delmas V., Bonnet X., Girondot M., Prévot-Julliard A.C. Varying hydric conditions during incubation influence egg water exchange and hatchling phenotype in the red-eared slider turtle. Physiological and Biochemical Zoology, 2008; 81:(3) 345–55. doi: 10.1086/529459
  • [20]. Mcgehee M.A. Effects of moisture on eggs and hatchlings of loggerhead sea turtles (Caretta caretta). Herpetologica, 1990; 46: 251-258.
There are 20 citations in total.

Details

Journal Section Natural Sciences
Authors

Bektaş Sönmez

Şükran Yalçın Özdılek

Publication Date December 8, 2017
Submission Date February 14, 2017
Acceptance Date October 30, 2017
Published in Issue Year 2017

Cite

APA Sönmez, B., & Yalçın Özdılek, Ş. (2017). A Preliminary Study of Using Some Nest Characteristics as Indicators for the Size of Green Turtle (Chelonia mydas) Hatchlings. Cumhuriyet Science Journal, 38(4), 60-67. https://doi.org/10.17776/csj.363298