Aytekin Günlü

Effect of different egg storage periods on some egg quality characteristics and hatchability of partridges (Alectoris graeca)

The effect of 1 to 2-, 3 to 4-, 5 to 6-, 7 to 8-, 9 to 10-, 11 to 12-, and 13 to 14-d storage periods on quality characteristics and hatchability of partridge (Alectoris graeca) eggs was studied. There was no significant effect of storage period on egg weight, shell weight, shell ratio, and shell thickness as external quality characteristics of partridge eggs (P > 0.05). Storage periods affected internal quality characteristics of partridge eggs (P < 0.05). An increase in yolk ratio (P < 0.05) and decrease in albumen ratio, yolk index, albumen index, and Haugh unit (P < 0.001) occurred when storage periods were lengthened. However, storage period had no significant effect on hatchability (P > 0.05). This study shows that long storage periods do not have negative effects on hatchability of partridge eggs to the extent that occurs in other poultry species. Because of a lack of knowledge about this subject, these studies will be useful in terms of successful intensive partridge breeding.

Effect of egg weight on chick weight, egg weight loss and hatchability in rock partridges (A. graeca)

Abstract This study was conducted to determine the effect of egg weight on chick weight, egg weight loss and hatchability in partridges. Eggs (847) obtained from rock partridges (44-46 weeks ages) were classified according to their weights as <18 g, 18.00-18.99 g, 19.00-19.99 g, 20.00-20.99 g, 21.00-21.99 g, 22.00-22.99 g and ≥23 g and incubated. A positive, powerful and important correlation (0.46 and 0.82 values) between egg weight and egg weight loss and chick weight in different groups was determined (P<0.001) in the study. The differences between hatchability and fertility in the egg groups were significant (P<0.05), but no differences were detected between hatchability of fertile eggs and embryonic mortalities. In conclusion, smaller and bigger eggs of partridges had low fertility while hatchability was disproportionately reduced in eggs that had lost less mass during incubation.

Fish consumption preferences and factors influencing it

Fish consumption preferences are affected by individuals’ socioeconomic characteristics. The aims of the present paper were (i) to obtain information on fish consumption level and frequency; (ii) to investigate the associations between the socioeconomic characteristics of consumers and their preferences; and (iii) to examine the influence of determinants on fish consumption. Data were gathered through a questionnaire completed by a total of 127 randomly selected individuals from different socioeconomic backgrounds from the Antakya, Turkey. The average consumption was found to be 2.98 kg/person/year for fish. Anchovies, gilt-head sea bream, and sea bass were reported as the most consumed three species, respectively. Significant differences in fish consumption were found among age groups, gender groups, and education groups, as well as between marital statuses. A majority of the consumers eat fish once a month throughout the year or only during the winter months. Fish consumption level and frequency were significantly positively correlated with education (p<0.01), income (p<0.05) and total meat consumption (p<0.01). The stepwise multiple regression model explained 41.7% (p<0.01) of the total variance for fish consumption. The amount and frequency of the consumption in the region, which is very far below the world and Turkey average especially for lower socioeconomic groups and for less-consumed fish species, can be increased by certain policies, such as training, advertising and different marketing strategies. Moreover, consumption should be distributed equally throughout the year instead of consuming only in certain seasons.

Kekliklerde (A. graeca) Yumurtlama Zamanının Kuluçka Sonuçları ile Bazı Yumurta Özelliklerine Etkisi

Bu calismada, keklik yumurtalarinda, yumurta kalitesi ve kulucka sonuclari uzerine yumurtlama zamaninin etkisi incelenmistir. Arastirmada, 89 haftalik yasta 64 adet disi ve 32 adet erkek Kaya kekligi (A. graeca) kullanilmistir. Keklik yumurtalari sabah (12.00) ve ogleden sonra (16.00) olmak uzere gunde iki kez toplanip kaydedilmistir. Bu calismada genel yumurta verimi % 48.30’dir. Elde edilen bu yumurtalarin % 27.37 sabah grubundan, % 20.94 ise ogle grubundan toplanmistir. Yumurtalarin geneli ele alindiginda % 56.89 sabah, % 43.11 ise ogle grubunda elde edilmis, iki grup arasindaki farklilik istatistiki olarak onemli bulunmustur (P