Study Of Ecological Aspects Research Articles

STUDY OF POPULATION DYNAMICS AND EXPLOITATION RATES OF CRAYFISH (PANULIRUS SPP) IN SPERMONDE WATERS, MAKASSAR STRAIT

To stimulate catch production and wise management patterns, research is carried out on the study of ecological aspects, estimates of population dynamics and exploitation rates of crayfish (Panulirus Spp) in the Spermonde waters of the Makassar Strait. Based on the COA (Correspondence Analysis) (Ludwig and Reynold, 1988), as well as the analysis of Von Bertalanffy (1938, in Sparre et al., 1989), it was found that the micro-habitat of Panulirus spp., Generally co-exist with massive coral species Alcyonaria (Sarcophyton, Heliophora , and Tubipora), and branching reefs of the Acropora species (Goniopora and Pavona), as well as living with algal grass species of Caulerpa and Halimeda. The growth pattern of Panulirus lobster follows the equation Lt = 46.3561 (1- e -0.1738 (t + 1.7827)), which means that the length decreases at relatively old age. The total mortality coefficient (Z) of population is 0.5066/year, this is relatively the same as the ideal mortality (M) which means optimal utilization, but it is necessary to select catch sizes that are larger than 24 - 27cm (in the range of 34 - 46cm).

A conceptualization and research strategy for the study of ecological aspects of the quality of life

The centerpiece of this paper is a proposed model identifying the various factors that ought to be brought into a thorough study of ecological aspects of quality of life. The model suggests that in addition to studying the physical, economic and social situation of an individual it also is important to study his beliefs about how the world works, his personal lifestyle, and his values, goals, aspirations and needs if one is to make adequate inferences about what produces the level of quality of life that he experiences. The model also shows that it is important to look at similar variables for a community or a society in order to arrive at inferences about quality of life for that community or society. Personal and societal learning is a dynamic factor in the model. The paper concludes with a discussion of strategies for operationalizing these factors in empirical studies.