[1].Diet of Juvenile Crocodylus porosus at Kuching Wetlands National Park, Sarawak, East Malaysia[J].Asian Herpetological Research,2021,12(3):323-330.[doi:10.16373/j.cnki.ahr.200107]
　Engkamat LADING and Indraneil DAS*.Diet of Juvenile Crocodylus porosus at Kuching Wetlands National Park, Sarawak, East Malaysia[J].Asian Herpetological Research(AHR),2021,12(3):323-330.[doi:10.16373/j.cnki.ahr.200107]
点击复制

Diet of Juvenile Crocodylus porosus at Kuching Wetlands National Park, Sarawak, East Malaysia()
分享到：

Asian Herpetological Research[ISSN:2095-0357/CN:51-1735/Q]

卷:
12
期数:
2021年3期
页码:
323-330
栏目:
出版日期:
2021-09-25

文章信息/Info

Title:
Diet of Juvenile Crocodylus porosus at Kuching Wetlands National Park, Sarawak, East Malaysia
文章编号:
AHR-2020-0107
Author(s):
Engkamat LADING1; 2 and Indraneil DAS2*
1 Sarawak Forest Department, Wisma Sumber Alam, Petra Jaya 93660, Sarawak, Malaysia
2 Institute of Biodiversity and Environmental Conservation, Universiti Malaysia Sarawak, Kota Samarahan 94300, Sarawak, Malaysia
Keywords:
saltwater crocodile;  Crocodylus porosus;  food;  ecology;  Borneo
DOI:
10.16373/j.cnki.ahr.200107
Abstract:
The diet of juvenile, including hatchlings and presumed yearlings of the Saltwater Crocodile, Crocodylus porosus, was studied at the Kuching Wetlands National Park, western Sarawak, East Malaysia (Borneo), using both frequency of occurrence and volumetric composition of diet through the stomach flushing technique. Crustaceans form the primary component of the diet of juvenile crocodiles, comprising shrimps of the family Atyidae (Caridina sp., and Penaeus indicus), occurring in the stomach of 17 individuals (53% by occurrence). An estimated 91.7% of hatchlings stomach-flushed had shrimps, and the emergence of hatchlings may be associated by inland migration of its shellfish prey, as reported in the literature. The secondary food item of hatchlings and presumed yearlings was ocypodid crabs, occurring in 16 individuals (in addition to a subadult), and comprise 47%–50% by occurrence. Other items taken incidentally include rodents (in large yearlings, exceeding 100 cm in total length), and fish (in seven hatchlings and in one subadult), or in 29% of total individuals captured (47.7% in hatchlings and 15% in yearlings). A dietary change in ontogeny is therefore evident, as reported earlier in crocodilians.

参考文献/References:

Allen G. R. 1974. The marine crocodile, Crocodylus porosus, from Ponape, Eastern Caroline Islands with notes on food habits of crocodiles from the Palau Archipelago. Copeia, 1974: 553
Anonymous. 2009. Term of Reference for the Environmental Impact Assessment (EIA) for the Proposed Flood Mitigation Works for Kuching City, Chemsain Konsultant Sdn. Bhd., Kuching, Sarawak. 38 pp
Bayliss P., Webb G. J. W., Whitehead P. J., Demsey K., Smith A. 1986. Estimating the abundance of saltwater crocodiles, Crocodylus porosus Schneider, in tidal wetlands of the Northern Territory: A mark-recapture experiment to correct spotlight counts to absolute numbers, and the calibration of helicopter and spotlight counts. Australian Wildl Res, 13: 309–320
Beavitt W., Tuen A. A. 2010. Swamp - Kuching Wetlands National Park. Universiti Malaysia Sarawak: Kota Samarahan, Sarawak. 112 pp
Chong V. C. 1980. Maturation and breeding ecology of the white prawn, Penaeus merguiensis De Man, In Tropical Ecology and Development. Proceedings of the Fifth International Symposium on Tropical Ecology. Furtado J. I. (Ed.). International Society of Tropical Ecology, Kuala Lumpur, 1175–1184
Fritzgerald L. A. 1989. An uation of stomach flushing techniques for crocodiles. J Herpetol, 23: 170–172
Grenard S. 1991. Handbook of Alligators and Crocodiles. Malabar, FL: Krieger Publishing Co. 210 pp
Jongkar G., Nyanti L., Hassan N., Jalim N. A., Seleman H., Mokta N. 2009. Fishes and decapod crustaceans of Kuching Mangrove Areas, Sarawak. In Proceedings of the International Conference on Marine Ecosystem 2009. 26–28 May 2009, Awana Porto Malai, Langkawi, 1–15
Magnusson W. E. 2017. Crocodilia diet. In Encyclopedia of Animal Cognition and Behavior. Vonk J., Shackelford T. J. (Eds.), Springer International AG, Cham, Switzerland. doi: 10.1007/978-3-319-47829-6_973-1, 1–5
Platt S. G., Elsey R. M., Liu H., Rainwater T. R., Nifong J. C., Rosenblatt A. E., Heithaus M. R., Mazzotti F. J. 2013a. Frugivory and seed dispersal by crocodilians: an overlooked form of saurochory? J Zool, 291: 87–99
Platt S. G., Thorbjarnarson J. B., Rainwater T. R., Martin D. R. 2013b. Diet of the American crocodile (Crocodylus acutus) in marine environments of coastal Belize. J Herpetol, 47: 1–10
Platt S. G., Rainwater T. R., Finger A. G., Thorbjarnarson J. B., Anderson T. A., McMurry S. T. 2006. Food habit, ontogenetic dietary partitioning and observations of foraging behaviour of Morelet’s crocodile (Crocodylus moreletii) in northern Belize. Herpetol J, 16: 281–290
Shahrul A. M. S., Stuebing R. B. 1996. Diet, growth and movements of juvenile crocodiles Crocodylus porosus Schneider in the Klias River, Sabah, Malaysia. J Trop Ecol, 12: 651–662
Soo C. L., Ling T. Y., Lee N. 2015. Assessment of the water quality of the western boundary of Kuching Wetland National Park, Sarawak, Malaysia. Borneo J Res Sci Tech, 5: 1–10
Stuebing R. B., Ismail G., Sallih K. 1985. The ecology of crocodile attacks in Batang Lupar, Sarawak. Sarawak Mus J, 55: 189–214
Stuebing R. B., Shahrul A. M. S. 1992. Distribution, population structure and some aspects on the ecology of the estuarine crocodile (Crocodylus porosus Schneider) in the Klias River, Sabah. Paper presented at 11th Working Meeting of the Crocodile Specialist Group of the Species Survival Commission (IUCN), Victoria Falls, Zimbabwe, 149–162
Taylor J. A. 1979. The foods and feeding habits of subadult Crocodylus porosus Schneider in Northern Australia. Austr Wildl Res, 6: 347–359
Webb G. J. W., Hollis G. J., Manolis S. C. 1991. Feeding, growth and food conversion rates of wild juvenile saltwater crocodiles (Crocodylus porosus). J Herpetol, 25: 462–473
Webb G., Manolis C. 1991. Monitoring saltwater crocodiles (Crocodylus porosus) in the Northern Territory of Australia). In Wildlife 2001: Populations. McCollough D. R. and Barret R. H. (Eds). Elsevier Applied Science, London and New York, 404–418
Webb G. J. W., Manolis S. C., Buckworth R. 1982. Crocodylus johnstoni in the McKinlay River area, Northern Territory. I. Variation in the diet, and a new method of assessing the relative importance of prey. Austr J Zool, 30: 877–879
Webb G. J. W., Manolis S. C., Sack G. C. 1984. Cloacal sexing of hatchling crocodiles. Australian Wildl Res, 11: 201–202
Wings O. 2007. A review of gastrolith function with implications for fossil vertebrates and a revised classification. Acta Palaeontol Pol, 52: 1–16

更新日期/Last Update: 2021-09-25