A Preliminary Study on Reproduction and Development of Bushymouth Catfish (Ancistrus dolichopterus) in Aquarium Conditions

Öz

Dwarf suckermouth catfish are preferred especially for small aquariums. They are usually referred to as tank cleaners and commonly traded in the ornamental fish sector. Since these fish are nocturnal, it is difficult to observe their reproductive behavior and larval development. This study was carried out to determine the reproductive variables of bushymouth catfish (Ancistrus dolichopterus) under aquarium conditions. Three broodstocks bushymouth catfish with an average initial weight and a total length of 10.5±0.3 g and 9.5±0.2 cm were stocked in three 240-L aquariums with the ratio of 1:2 (male: female). The observations were made in triplicate tanks for six months. Females laid an average of 39.78±0.41 eggs and fertilization and hatching rates were 75.05% and 62.94%, respectively. It was found that the transition time from egg to apparently larval stage was 105.28 h, and bushymouth catfish showed an indistinguishable development from the hatching to juvenile stage without a real larval transition stage. The results of the study provide basic information on the reproductive performance and early development of bushymouth catfish.

Anahtar Kelimeler

• Ornamental fish
• suckermouth catfish
• Ancistrus dolichopterus
• seed production
• larvae

Çalı Ağız Cüce Vatozun (Ancistrus dolichopterus) Akvaryum Koşullarında Üremesi ve Gelişimi Üzerine Bir Ön Çalışma

Öz

Vatozların cüce türleri özellikle küçük akvaryumlar için tercih edilirler. Genellikle tank temizleyiciler olarak adlandırılırlar ve süs balıkları sektöründe sıklıkla ticaretleri yapılır. Bu balıklar gececildir ve üreme performansları ve larval gelişimlerini gözlemek zordur. Bu çalışmada, çalı ağız cüce vatozun (Ancistrus dolichopterus) akvaryum koşullarında üretimi üzerine bir deneme yürütülmüştür. Denemede, başlangıç ağırlığı ve total boyu ortalama 10,5±0,3 g ve 9,5±0,2 cm olan çalı ağız vatozlar 1:2 (erkek:dişi) oranı ile 240 L akvaryumlarda stoklanmıştır. Çalışma, altı ay boyunca üç tekrarlı olarak gerçekleştirilmiştir. Dişiler ortalama 39,78±0,41 adet yumurta bırakmış, döllenme ve yumurtadan çıkış oranları sırasıyla %75,05 ve %62,94 olarak kaydedilmiştir. Yumurtadan larvaya geçiş süresinin 105,28 saat sürdüğü ve çalı ağız vatozun yumurta ve yavru evreleri arasında ayırt edilemez bir gelişme gösterdiği ve gerçek bir larval geçiş evresine sahip olmadıkları bulunmuştur. Çalışmanın sonuçları gelişimsel özellikleri gözlemlenmesi zor olan bu süs balığı türünün gelişimi hakkında temel bilgiler sağlamıştır.

Anahtar Kelimeler

• Süs balığı
• vatoz
• Ancistrus dolichopterus
• yumurta üretimi
• larva

Kaynakça

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