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A new maximum size for Eledone moschata (Cephalopoda: Octopodidae)

A specimen of the musky octopus, Eledone moschata , of 188 mm mantle length and 1414 g total body weight, was caught on 12 February 2007 by trammel net in Izmir Bay. The given sizes are the maximal for this species at the present time.

Ultraviyole ışınlama ünitesinin dizaynı: Dezenfeksiyon performansı ve işletme maliyetleri üzerine etkileri

Akuakultur kullanimlari icin ultraviyole isinlama unite tasariminin dezenfeksiyon verimine ve isletme maliyetlerine etkisi incelenmistir. Iki prototip (H ve U), ticari bir UV filtresiyle (I) karsilastirilmistir. Mikrobiyal ekim icin su ornekleri 15°C ve 25°C su sicakliginda dort tekrarli olarak her uc ultraviyole filtrenin su girisi ve cikisindan alinmistir. Son olarak, UV filtreler arasinda istatistiksel olarak onemli farklilik bulunmamakla birlikte, en iyi filtreleme performansi, 15°C ve 25°C su sicakliklarinda, U tipi UV filtreden saglanmistir (P>0,05). Ayrica, sadece UV unitesinin tasarimini degistirerek bakim - onarim ve isletme maliyetlerinde %60 tasarruf yapilabilecegi hesaplanmistir.

Effects of 2-Phenoxyethanol on cuttlefish Sepia officinalis L. (Cephalopoda: Sepiidae).

Effects of 2-Phenoxyethanol (2-PhOH) on cuttlefish Sepia officinalis (L.) were investigated. The five concentrations (0.10, 0.15, 0.20, 0.25 and 0.30 ml/L) of 2-PhOH were dissolved directly into 15 L transparency glass aquarium containing of 10 L continuously aerated seawater (pH 7.68, O2 6.8 mg/l, salinity 37‰ at 19.7°C). After 2-PhOH treatments, the cuttlefishes were transferred immediately to a polyester recovery tank with 450 L of well-aerated seawater, where they were observed in 48-h due to any mortality. Six cuttlefishes, the mean body weight was 224.46 ± 56.20 g (n=30) were used individually in each experiment. According to the present results, at 0.1 ml/L of 2-PhOH level neither anesthetic effects nor mortality occurred on the cuttlefish, but more than 50% mortality occurred between 0.15 and 0.30 ml/L of 2-PhOH concentrations. The percentages of survival were 100% for 0.10 ml/L, 33.3% for 0.15 and 0.20 ml/L, and 16.7% for 0.25 and 0.30 ml/L of 2-PhOH concentrations (P<0.05). The reminders recovered within 5 minutes and survived over 48 hours. Finally, the current study demonstrated that 2-PhOH could not be recommended for S. officinalis due to its inefficiency and toxicity.