The Growth and Mortality Rate of Mullet (Mugil dussumieri) on Seagrass Beds of The Teluk Awur Bay, Jepara

3rd International Conference on Tropical and Coastal Region Eco Development 2017

地球科学;生态环境科学

Pinandita, L.K.^1 ; Riniatsih, I.^1 ; Irwani, I.^1

Departement of Marine Science, Faculty of Fisheries and Marine Science, Diponegoro University, Jl. Prof. H. Soedarto, SH, Tembalang, Semarang

50275, Indonesia^1

关键词: Coefficient values;    Exploitation;    Microsoft excel;    Mortality;    Mullet (Mugil dussumieri);    Primary productivity;    Seagrasses;    Spawning grounds;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/116/1/012069/pdf
DOI  :  10.1088/1755-1315/116/1/012069

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Seagrass beds that have relatively high primary productivity are used as habitat for many marine species. Fish use seagrass as feeding, nursery, and spawning grounds. This research aimed to determinate the growth and mortality rates of mullet (Mugil dussumieri) on seagrass bed ecosystems of Teluk Awur Bay water, Jepara, Central Java. The descriptive method was applied in this research with the purposive method for sampling. Microsoft Excel software and FISAT II of FAO were used for data analyses, and the samples of 347 mullet (M. dussumieri) were taken from October until December 2016. The results of this research showed that length of fish ranges 8-28.9 cm with weight range 5-248 grams. The growth coefficient value (K) was 0.33 with asymptotic length (L∞) 30.24 cm, and the value of t was-0.305, which will be reaching for 11 years. The rate of total mortality (Z) was 0.854 per year, the value of natural mortality (M) was 0.706 per year and the value of fishing mortality (F) was 0.148 per year. Exploitation ratio (E) was 0.173 per year, it indicated that only 17.3% of mullet's (M. dussumieri) deaths in Teluk Awur Bay waters caused bycatch. It can be estimated that the death of mullet in Teluk Awur Bay waters affected more by the condition of the waters, in this case, the decreasing density of seagrass in research location is expected to affect the growth of mullet.