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Abstract
The beak is a critical component of the fowl skeleton. Unlike mammals, fowls lack teeth; instead, their upper and lower jaws are elongated, forming a species-specific beak. The beak functions as both hand and mouth in fowls and is used for food intake, feather trimming, collecting food, building nests, feeding chicks, and self-defense. This research examines the beak structure in various domestic fowls. Beak specimens were collected from the anatomy laboratory and measured using a simple ruler. The findings reveal that the structure and size of beaks vary depending on food types, feeding habits, and environmental conditions.
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References
- منصوری ج. رهنمایی پرندهګان صحرایی ایران، تهرانُ، انتشارات کتاب فرزانه. 1388، ص 317.
- میرشمی ا، درویش ج. مبانی بیوسیستماتیک جانوری، ویرایش دوم، چاپ سوم، ګروهی پژوهشی جوندهشسناسی، دانشګاه فردوسی مشهد. انتشارات دانشګاه فردوسی مشهد 1989. ص 189.
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- درویش و جمشید. جمعیتها، ګونهها و تکامل، ترجمه از ارنستمایر دانشګاه هاروراد. انتشارات دانشګاه فردوسی مشهد. 1389، ص 253.
- Dyce KM, Sack WO and Wensing CJG. Textbook of Veterinary Anatomy. 1st edition, W. B. Saunders Company, Philadelphia, USA. 1987: Pp 772-779.
- Tankared K. Anatomy of the Chicken and Domestic Birds. The Iowa State University. USA. 1973: Pp 6-46.
- Nickel R, Schummer A and Seiferle E. Anatomy of the Domestic Birds. Verlag Paul Parey, Berlin, Hamburg. Germany. 1977: Pp 4-25.
- Alfred ML and Peter RS. Avian Anatomy, Integument, Part I .Agriculture Handbook 362. U. S. Government Printing Office, Washington DC. USA. 1972: P 64.
- Mclelland J. A Color Atlas of Avian Anatomy. Wolfe Publishing Ltd. USA. 1990: P 33.
- Dyce KM, Sack WO and Wensing CJG. Textbook of Veterinary Anatomy. 3rd edition, W. B. Saunders Company, Philadelphia, USA. 2002: Pp 799-824.
- King AS and Mclelland J. Outlines of Avian Anatomy. Bailliere Tindall. London. UK. 1975: Pp 3-33.
- . Konig HE, Korbel R and Liebich HG. Avian Anatomy, Textbook and color atlas. 5m Publishing Ltd. Sheffield, IQN, UK. 2016: Pp 36-101.
- Carruthers C, Gabrush T, Schwean-Lardner K, Knezacek TD, Classen HL and Bennett C. On-farm survey of beak characteristics in White Leghorns as a result of hot blade trimming or infrared beak treatment. J. Appl. Poult. Res. 2012;21:645–650.
- Dennis RL, Fahey AG and Cheng HW. Infrared beak treatment method compared with conventional hot-blade trimming in laying hens. Poult. Sci. 2009;88:38–43.
- Duncan IJH, Slee GS, Seawright E and Breward J. Behavioural consequences of partial beak amputation (beak trimming) in poultry. Br. Poult. Sci. 1989;30:479–488.
- Ege G, Bozkurt M, Koçer B, Tüzün AE, Uygun M and Alkan G. Influence of feed particle size and feed form on productive performance, egg quality, gastrointestinal tract traits, digestive enzymes, intestinal morphology and nutrient digestibility of laying hens reared in enriched cages. Poult. Sci. 2019;98:3787–3801.
- Gentle MJ, Hughes BO and Hubrecht RC. The effect of beak-trimming on food intake, feeding behaviour and body weight in adult hens. Appl. Anim. Ethol. 1982;8:147–159.
- Glatz PC. Beak trimming methods. Asian-Australas. J. Anim. Sci. 2000;13:1619–1637.
- Glatz PC. The effect of beak length and condition on food intake and feeding behaviour of hens. Int. J. Poult. Sci. 2003;2:53–57.
- Glatz PC. Effect of Hot-Blade and Infrared Beak Trimming on Beak Condition, Production, and Mortality of Laying Hens. Proc. 8th Poult. Welf. Symp., Cervia, Italy: World's Poult. Sci. Assoc. 2009: 223-245.
- Holder DP and Bradford MV. Relationship of specific gravity of chicken eggs to number of cracked eggs observed and percent shell. Poult. Sci. 1979;8:250–251.
- Kajlich AS, Shivaprasad HL, Trampel DW, Hill AE, Parsons RL, Millman ST and Mench JA. Incidence, severity, and welfare implications of lesions observed postmortem in laying hens from commercial noncage farms in California and Iowa. Avian Dis. 2016;60:8–15.
- Lee HY and Craig JV. Beak trimming effects on the behaviour and weight gain of floor reared, egg strain pullets from 3 genetic stocks during the rearing period. Poult. Sci. 1990;69:568–575.
- Marchant-Forde RM, Fahey AG and Cheng HW. Comparative effects of infrared and one third hot-blade trimming on beak topography, behaviour, and growth. Poult. Sci. 2008;87:1474–1483.
- McKeegan DEF and Philbey AW. Chronic neurophysiological and anatomical changes associated with infrared beak treatment and their implications for laying hen welfare. Anim. Welf. 2012;21:207–217.
- Prescott NB and Bonser RHC. Beak trimming reduces feeding efficiency of hens. J. Appl. Poult. Res. 2004;13:468–471.
- Rose LM. Behavioral sampling in the field: continuous focal versus focal interval sampling. Behaviour. 2000;137:153–180.
- Schwean-Lardner K, Annett-Christianson CB., Rajendram J and Classen HL. Does age of hot-blade trimming impact the performance and welfare of 2 strains of White Leghorn hens? J. Appl. Poult. Res. 2016;25:547–560.
- Struthers S, Classen HL., Gomis S and Schwean-Lardner K. The effect of beak tissue sloughing and post-treatment beak shape on the productivity of infrared beak treated layer pullets and hens. Poult. Sci. 2019;98:3637–3646.
References
منصوری ج. رهنمایی پرندهګان صحرایی ایران، تهرانُ، انتشارات کتاب فرزانه. 1388، ص 317.
میرشمی ا، درویش ج. مبانی بیوسیستماتیک جانوری، ویرایش دوم، چاپ سوم، ګروهی پژوهشی جوندهشسناسی، دانشګاه فردوسی مشهد. انتشارات دانشګاه فردوسی مشهد 1989. ص 189.
شایسته فر و علیرضا. جانورشناسی علمی، ایران انتشارات دانشګاه اراک. 1391، صص 203 – 224.
درویش و جمشید. جمعیتها، ګونهها و تکامل، ترجمه از ارنستمایر دانشګاه هاروراد. انتشارات دانشګاه فردوسی مشهد. 1389، ص 253.
Dyce KM, Sack WO and Wensing CJG. Textbook of Veterinary Anatomy. 1st edition, W. B. Saunders Company, Philadelphia, USA. 1987: Pp 772-779.
Tankared K. Anatomy of the Chicken and Domestic Birds. The Iowa State University. USA. 1973: Pp 6-46.
Nickel R, Schummer A and Seiferle E. Anatomy of the Domestic Birds. Verlag Paul Parey, Berlin, Hamburg. Germany. 1977: Pp 4-25.
Alfred ML and Peter RS. Avian Anatomy, Integument, Part I .Agriculture Handbook 362. U. S. Government Printing Office, Washington DC. USA. 1972: P 64.
Mclelland J. A Color Atlas of Avian Anatomy. Wolfe Publishing Ltd. USA. 1990: P 33.
Dyce KM, Sack WO and Wensing CJG. Textbook of Veterinary Anatomy. 3rd edition, W. B. Saunders Company, Philadelphia, USA. 2002: Pp 799-824.
King AS and Mclelland J. Outlines of Avian Anatomy. Bailliere Tindall. London. UK. 1975: Pp 3-33.
. Konig HE, Korbel R and Liebich HG. Avian Anatomy, Textbook and color atlas. 5m Publishing Ltd. Sheffield, IQN, UK. 2016: Pp 36-101.
Carruthers C, Gabrush T, Schwean-Lardner K, Knezacek TD, Classen HL and Bennett C. On-farm survey of beak characteristics in White Leghorns as a result of hot blade trimming or infrared beak treatment. J. Appl. Poult. Res. 2012;21:645–650.
Dennis RL, Fahey AG and Cheng HW. Infrared beak treatment method compared with conventional hot-blade trimming in laying hens. Poult. Sci. 2009;88:38–43.
Duncan IJH, Slee GS, Seawright E and Breward J. Behavioural consequences of partial beak amputation (beak trimming) in poultry. Br. Poult. Sci. 1989;30:479–488.
Ege G, Bozkurt M, Koçer B, Tüzün AE, Uygun M and Alkan G. Influence of feed particle size and feed form on productive performance, egg quality, gastrointestinal tract traits, digestive enzymes, intestinal morphology and nutrient digestibility of laying hens reared in enriched cages. Poult. Sci. 2019;98:3787–3801.
Gentle MJ, Hughes BO and Hubrecht RC. The effect of beak-trimming on food intake, feeding behaviour and body weight in adult hens. Appl. Anim. Ethol. 1982;8:147–159.
Glatz PC. Beak trimming methods. Asian-Australas. J. Anim. Sci. 2000;13:1619–1637.
Glatz PC. The effect of beak length and condition on food intake and feeding behaviour of hens. Int. J. Poult. Sci. 2003;2:53–57.
Glatz PC. Effect of Hot-Blade and Infrared Beak Trimming on Beak Condition, Production, and Mortality of Laying Hens. Proc. 8th Poult. Welf. Symp., Cervia, Italy: World's Poult. Sci. Assoc. 2009: 223-245.
Holder DP and Bradford MV. Relationship of specific gravity of chicken eggs to number of cracked eggs observed and percent shell. Poult. Sci. 1979;8:250–251.
Kajlich AS, Shivaprasad HL, Trampel DW, Hill AE, Parsons RL, Millman ST and Mench JA. Incidence, severity, and welfare implications of lesions observed postmortem in laying hens from commercial noncage farms in California and Iowa. Avian Dis. 2016;60:8–15.
Lee HY and Craig JV. Beak trimming effects on the behaviour and weight gain of floor reared, egg strain pullets from 3 genetic stocks during the rearing period. Poult. Sci. 1990;69:568–575.
Marchant-Forde RM, Fahey AG and Cheng HW. Comparative effects of infrared and one third hot-blade trimming on beak topography, behaviour, and growth. Poult. Sci. 2008;87:1474–1483.
McKeegan DEF and Philbey AW. Chronic neurophysiological and anatomical changes associated with infrared beak treatment and their implications for laying hen welfare. Anim. Welf. 2012;21:207–217.
Prescott NB and Bonser RHC. Beak trimming reduces feeding efficiency of hens. J. Appl. Poult. Res. 2004;13:468–471.
Rose LM. Behavioral sampling in the field: continuous focal versus focal interval sampling. Behaviour. 2000;137:153–180.
Schwean-Lardner K, Annett-Christianson CB., Rajendram J and Classen HL. Does age of hot-blade trimming impact the performance and welfare of 2 strains of White Leghorn hens? J. Appl. Poult. Res. 2016;25:547–560.
Struthers S, Classen HL., Gomis S and Schwean-Lardner K. The effect of beak tissue sloughing and post-treatment beak shape on the productivity of infrared beak treated layer pullets and hens. Poult. Sci. 2019;98:3637–3646.