ILMU KELAUTAN: Indonesian Journal of Marine Sciences
Vol 9, No 1 (2004): Jurnal Ilmu Kelautan

Estimation on Mortality of Tropical Limpet Cellana testudinaria (Class : Gastropoda, Family : Patellidae) Living on the Rocky Shore of Ohoiwait, Southeast Moluccas, Indonesia

Abraham Seumel Khouw (Faculty of FIsheries and Marine Science, Pattimura University)



Article Info

Publish Date
05 Mar 2012

Abstract

Sebanyak 2402 ekor limpet diperoleh dari 12 bulan pengambilan sampel yakni dari Oktober  2001 sampai September  2002. Rata-rata mortalitas limpet C. testudlnaria diestimasi dengan mempergunakan tiga metoda yang berbeda  dengan hasil adalah sebesar 94% per tahun (Z =2.81).  Mortalitas terbesar yang dilakukan dengan menggunakan pendekatan metoda Ault-Ehrhardt   dijumpai pada bulan Oktober 2001 dan April 2002, dimana terjadi kekeringan dan hempasan gelombang yang terbesar. Akan tetapi  tidak ada korelasi yang jetas antara mortalitas dan faktor-faktor  lingkungan. A total oF 2202 limpets were obtained  in 12 monthly collections (from October 2001 to September  2002). The mean mortality oF C. testudinaria was estimated, using three different methods;   reduction in the survival  of individual size frequency cohorts through  time, monthly calculation of the Ault  and Ehrhardt moment estimation, and length-converted catch curves. to be 94% per year  (Z = 2.81). Highest monthly mortality rates, determined with the Ault-Ehrhardt approach, were observed  in October 2001 and April  2002,  when  desiccation  stress (temperature of the rocky  surface  was about  4O0C) and  wave  action  (was about  3 m),  respectively,    were highest   However,   there  was no significant linear correlation  between  mortality and environmental   variables.

Copyrights © 2004






Journal Info

Abbrev

ijms

Publisher

Subject

Earth & Planetary Sciences

Description

ILMU KELAUTAN: Indonesian Journal of Marine Sciences (IJMS) is dedicated to published highest quality of research papers and review on all aspects of marine biology, marine conservation, marine culture, marine geology and ...