Impact of tidal phenomenon "Met Ef" on the exploitation of benthos at inshore shoals in Kei islands, Indonesia

2nd International Conference on Applied Marine Science and Fisheries Technology 2017

地球科学;农业科学

Renjaan, Eugenius Alfred^1 ; Makailipessy, Marvin Mario^1

Tual State Fisheries Polytechnic, Langgur - Sathean Ring Road, P.O. Box 1001, Maluku, Indonesia^1

关键词: Direct observations;    Ebb tides;    Indonesia;    Local community;    Mobile applications;    Tidal ranges;    Tide charts;    Wind speed;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/89/1/012009/pdf
DOI  :  10.1088/1755-1315/89/1/012009

学科分类：农业科学（综合）

来源: IOP

【 摘 要 】

A study on benthos exploitation at five shoals located in Rosenberg and Nerong Straits, the kei islands had been conducted during period of the lowest ebb tide phenomenon which locally termed Met Ef on 2016. The purpose of the study is to know the impact of the Met Ef on benthos exploitation at the shoals by local communities during the Met Ef. Data of tidal amplitudes were obtained from the Tide Charts Mobile Applications which confirmed the observations on tide pole during October, November, and December 2013 until 2016. Data of benthos exploited during periods of Met Ef at the shoals was obtained through direct observation on benthos exploited by the local communities, also by interviewing them using questionnaires. The results showed that the lowest ebb tide of the Met Ef occurred in November, i.e., at 2 to 5 days after the full moon and/or new moon, with an average tidal range of 2.66 m and even have ever one reached 2.80 m. The most exploited benthos at the shoals is Giant clam (Tridacna sp.), Spider conch (Lambis sp.), Hammer oyster (Malleus sp.), Octopus (Octopus spp.). The intensity of benthos exploited at the shoals increased during the period of Met Ef especially in October because at that time the sea was very calm and clear due to relatively lower wind speed and the rain fall was relatively lower. This has promoted an easier accessibility of the communities to exploit benthos at shoals and, therefore October is considered by the local communities as the peak of Met Ef, instead of November. During November and, December the availability of benthos in shoals has been reduced due to it has been exploited intensely in October.