The biodiversity of the Congo Basin is a resource that must be well known and managed. Despite the strong pressure exerted on it, biodiversity still contains emblematic species that must be preserved. In addition to their biological importance, tropical forests remain essential for the riparian populations. Hence the need for rational and efficient management.We were interested in a seasonal catch assessment of endangered species fish. The results obtained during this research prove the failure to respect the capture of certain species of fish without taking into account the respect of the season (the calendar, the fishing zones as well as the biological maturity).This state of affairs sufficiently proves that the Ministry of Agriculture, Fisheries and Livestock as well as that of the Environment, Nature Conservation and Tourism through the various services do not apply the regulatory measures for conservation of halieutic diversity.

The decline in biodiversity is an alarming reality, nearly half of all primate species are threatened with extinction, and all great ape species - bonobos, chimpanzees, gorillas, orangutans and so many others are concerned. The main threats identified in recent years are habitat destruction, poaching, situations of armed conflict and disease transmission. The great apes have thus been the subject of numerous conservation efforts for several decades. However, despite these efforts, the decline of their populations continues. Therefore, the present study consists in evaluating wild animal species totally protected, and clandestinely sold in the markets of Mbandaka in the Democratic Republic of Congo (DRC). Our surveys were carried out in the five markets of the city of Mbandaka distributed as follows: Sokozelo: 34, Basoko: 10, Makila: 8, Mbandaka II: 6, Mandala II: 7. The results obtained show that: - 79.92% of the surveyed population sells species of animals totally protected by CITES. - Among the 45 fully protected animals, 10 or 22.2% are sold illegally in the various markets surveyed in the city of Mbandaka. - 81% of sellers of meat from protected animals do not know CITES laws, on the other hand 18.4% of these sellers have an idea about knowledge of CITES laws. - The absence of functional structures likely to ensure the application of the law on wildlife conservation in the Democratic Republic of Congo. - No environmental information and education, as well as awareness raising on wildlife conservation and protection in Equateur province. - Poor popularization of CITES laws on the conservation and protection of fully protected species in Equateur Province. - Complicity of park eco-guards with poachers.

This paper analyses the urban metabolism of Kinshasa and forms on self- relience (resilience) socio-economic strategies as responses to socio-environmental vulnerability. Based on house hold survey, results revealed that with more than 80% of people are jobless, many families survival depends on resilience strategies in Kinshasa. This situation cannot boost the urban city sustainability. Some appropriated strategies should be promoted to ease the access to good education, health care facility, decent living, good transport, good nutrition and good public income, etc. Otherwise, the urban environment will be harmful, not sustainable, and the 21 st Century sustainable City will remains a dream.

In principle, african cities especially, those of countries in post-conflict conditions are under various socio-environmental threats of disappearance based on primary life indicators all in red light. Surprisingly, they are still alive. What are strategies maintaining such cities? What are main resilience strategies?
Based on the Kinshasa (D R Congo) case of study, we conclude that main resilience strategies are related to the informal sector, and on "help yourself strategy". This paper describes in detail some of those strategies.