Kırma mercan (Pagellus erythrinus L., 1758) bireyleri Kasım 1999-Ekim 2000 periyodu boyunca trolle Edremit Körfezi'nden yakalanmıştır. Çatal boy 77-228 mm. arasında değişmektedir. Bu tür protojin hermafroditizm özelliğindedir. Erkeklerin dişiye oranı l:3.16'dır. Üreme zamanı Nisan-Ekim olup yumurtlama aktivitesindeki pik Ağustos-Eylül arası oluşur. Dişiler %50 olgunluk yaşma 13 mm çatal boyda ulaşır. Boy-ağırlık ilişkisi parametreleri tüm bireyler için: a= 0.00007 ve b= 2.7388 olarak saptanmıştır. Balıklar O-VEI yaş arasında bulunmuştur. Tüm populasyon için von Bertalanfry büyüme parametreleri: $L_infty$ =239.95 mm, k= 0.16 $yıl^{-1}$ ve $t_o$ = -2.6 yıl. Dişi, erkek ve tüm bireyler için negatif allometrik büyüme gözlenmiştir. Tüm balıklar için mortalite oranlan: Z= 0.764, %Z= %53, M= 0.375, F= 0.398 ve sömürü oranı E= 0.509 olarak saptandı. Bu veriler, Edremit Körfezi'ndeki kırma mercan stoklarının sömürüsünün sınırda olduğunu göstermektedir. Yumurtlama stoklarının ve stoğa katılımın korunması için önlemler alınması gereklidir. Örneğin av yasaklan girişimleri veya balık avlama modellerinde çeşitli değişiklikler gibi.
Common pandora (Pagellus erythrinus L, 1758) were caught in the Edremit Bay using the trawls during the period of November 1999 to October 2000. The fork length varied between 77 and 228 mm. Protogynous hermaphroditism characterized the species. The overall ratio of males to females was 1:3.16. The duration of the reproductive season was from April to October and a peak in spawning activity occurred in August-September. Females reached fifty percent maturity at a fork length 13 mm. The length-weight relationship for all individuals was described by the following parameters: a= 0.00007 and b= 2.7388. Fish aged 0-VHI years were found. The von Bertalanffy growth parameters for the whole population were: $L_infty$ = 239.95 mm, k= 0.16 $year^{-1}$ and $t_o$ = -2.6 year. Negative allometric growth was observed for females, males and all individuals. For all fish, the rates of mortality were: Z= 0.764, %Z= %53, M= 0.375, F= 0.398 and the exploitation ratio E= 0.509. This data shows that the stock of the common pandora of the Edremit Bay is being exploited in the limit. It would be desirable to take measures to protect the spawning stock and recruits, for example by introducing a closed season or various changes in fishing patterns.
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