Rapa Deniz Salyangozu (Rapana venosa Valenciennes, 1846) Populasyon Özelliklerinin Araştırılması, Çamburnu Koyu (Trabzon)

Öz

Bu çalışmada, Doğu Karadeniz kıyısal alandan toplanan deniz salyangozu (Rapana venosa) örneklerinin bazı populasyon özellikleri araştırılmıştır. Bu amaçla 2020 yılı içerisinde Çamburnu Koyu (Trabzon) ∼7-13 m derinlikden şnorkel ile Rapa salyangozu örnekleri toplanmıştır. Kabuk boyutu (kabuk boyu ve genişliği) ve operkulum boyutu (ağız boyu ve genişliği) ile toplam vücut ağırlığı gibi morfometrik ölçümler 0,01 cm hassasiyetli kumpas ve 0,01 g dijital terazi ile ölçülmüştür. Gastropodların kas ve hepatopankreas dokularındaki metal düzeyleri [çinko (Zn), bakır (Cu), kadmiyum (Cd) ve kurşun (Pb)], indüktif eşleşmiş plazma atomik emisyon spektroskopisi ile ölçülmüştür (ICP-OES). Örneklenen deniz salyangozu popülasyonunun %48,76'sının dişi, %51,24'ünün erkek bireylerden olduğu gözlenmiştir. Ortalama kabuk boyu-kabuk genişliği, ağız boyu-ağız genişliği ve salyangoz toplam vücut ağırlığı sırayla 35,6-27,2 mm, 26,5-11,7 mm ve 14,6 g olarak belirlenmiştir. Bu çalışmada deniz salyangozunun toplam kabuk boyu ile toplam vücut ağırlık ilişkisini gösteren bağıntı W=0,034*SL2,63 olarak hesaplanmıştır. Deniz salyangozu kas dokusundaki metaller incelendiğinde en az birikim kurşun ve kadmiyum düzeyinde gözlendi. Diğer yandan hepatopankreas dokusundaki metaller incelendiğinde çinko ve bakır düzeyinde aşırı birikim gözlendi. Ayrıca, dokularda metal birikimi ile salyangozun kabuksuz yaş ağırlığı ve operkulum boyutları arasında pozitif bir ilişki tespit edilmiştir.

Anahtar Kelimeler

• Birikim
• Metal analizleri
• Morfometri
• Deniz salyangozu

Investigation of Population Characteristics of Rapa Sea Snail (Rapana venosa Valenciennes, 1846) in Çamburnu Bay (Trabzon)

Abstract

In the present study, some population characteristics of Rapa Sea snail (Rapana venosa) samples collected from coastal zone of the Eastern Black Sea were investigated. For this purpose, Rapa whelk samples were collected by snorkeling from depths of ∼7-13 m in Çamburnu Bay (Trabzon) in the year 2020. Morphometric measurements such as shell size (shell length and width) and operculum size (aperture length and width) as well as total body weight were measured using a caliper with an accuracy of 0,01 cm and a digital balance with an accuracy of 0,01 g, respectively. Metal levels [zinc (Zn), copper (Cu), cadmium (Cd) and lead (Pb)] in muscle and hepatopancreas tissues of gastropods were measured by inductively coupled plasma atomic emission spectroscopy (ICP-OES). It was observed that 48,76% of the sampled sea snail population was female and 51,24% was male. The mean shell length-shell width, aperture length-aperture width, and snail total body weight were determined as 35,6-27,2 mm, 26,5-11,7 mm and 14,6 g, respectively. In this study, the relation showing the relationship between the total shell length and the total body weight of the sea snail was calculated as W=0,0034*SL2,63. The least accumulation was observed at the level of lead and cadmium, when the metals in the sea snail muscle tissue were examined. On the other hand, when the metals in the hepatopancreas tissue were examined, excessive accumulation was observed at the level of zinc and copper. In addition, a positive correlation was determined between the metal accumulation in the tissues and the wet weight of the unshelled snail and the aperture length, respectively.

Keywords

• Accumulation
• Metal analyses
• Morphometry
• Sea snail

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