A preliminary study on the population characteristics of the lessepsian species Pseudonereis anomala (Polychaeta: Nereididae) in İskenderun bay (Levantine Sea, Easter Mediterranean)

Bu çalışma, Eylül 2005'de İskenderun Körfezi'nin çeşitli kıyısal habitatlarından toplanan Pseudonereis anomala'nm populasyon yapısını ve biyolojisini ele almaktadır. Bölgede P.anomala'ya ait toplam 434 birey bulunmuştur. Bu türün bölgedeki azami yoğunluk ve biyokütle değerleri sırasıyla 2475 birey m"2 (istasyon Kİ, Jania rubens üzerinde) ve 7,85 g m"2 (istasyon K5, Brachidontes pharaonis üzerinde) olarak bulunmuştur. İskenderun Körfezi'ndeki P. anomala bireylerinin biyometrik ölçümleri arasındaki ilişkiler, regresyon ve korelasyon analizleri kullanılarak saptanmıştır. P. anomala'nm büyümesi muhtemelen allometriktir. İncelenen bireyler arasında, sadece bir bireyin olgun olmayan yumurtalar taşıdığı bulunmuştur. Disekte edilen bireylerin sindirim kanallarında sadece bitki kalıntıları bulunmuştur.

Lessepsian tür Pseudonereis anomala'nın (Polychaeta: Nereididae) İskenderun körfezi'ndeki (Levantin Denizi Doğu Akdeniz) Populasyon özellikleri üzerine bir ön çalışma

The present paper deals with the population structure and biology of Pseudonereis anomala collected from different shallow-water habitats of İskenderun Bay in September 2005. In ail, 434 specimens of P. anomala were found in the area. The maximum density and biomass values of the species in the area were 2475 ind. m"2 (on Jania rubens) and 7.85 g m2 (among the bivalve Brachidontes pharaonis), respectively. The relationships among the biometrical measurements of the P. anomala specimens were assessed using regression and correlation analyses. The growth of P. anomala seems to be allometric. Among the specimens examined, only one specimen had immature oocytes. Only plant remnants were found in the digestive tracts of the dissected specimens.

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