BIO FLOC HURDLES AND HIS SOLUTION. بائیو فلاک کی مشکلات اور ان کا حل

Characteristics, structure and resources of the sector
Summary
Aquaculture is a rather recent activity in Pakistan and is still in its infancy; nevertheless there is immense potential for development of the sector. Despite its vast fresh, brackish and marine water resources only carp culture is practiced in inland waters and only on a limited scale, carp are cultured in earthen ponds, using mostly extensive farming practices with very little inputs. In Pakistan, the fish fauna is rich but only seven warm water species and two cold water species are cultivated on a commercial scale. Trials experimenting with shrimp culture have been carried out in the Indus delta region but it did not succeed due to the non-availability of hatchery-produced seed.
The fisheries sector as a whole contributes to about 1percent to the country's GDP and provides jobs for about 1percent of the country's labour force. Freshwater carp farming is the major aquaculture activity in three of the country's four provinces (Punjab, Sindh and North West Frontier Province [NWFP]). The northern mountains of Pakistan have good potential for trout culture but production in these colder regions is still very small.
Aquaculture in Pakistan is basically a provincial responsibility; at the central level fisheries is the responsibility of the office of the Fisheries Development Commissioner (FDC) working under the Ministry of Food, Agriculture and Livestock (MINFAL). The office of the FDC is responsible for policy, planning and coordination with provincial fisheries departments and other national and international agencies. The Pakistan Agricultural Research Council (PARC) is the country's largest research organisation and is responsible to MINFAL. Some universities in the country are also involved in basic fisheries research.
History and general overview
Aquaculture in Pakistan is a recent development and in many parts of the country the management of the sector is still poor with culture practices varying across the different provinces. Two Asian Development Bank (ADB) assisted projects have assisted in strengthening the institutional structure, with infrastructure development such as the development of hatcheries and juvenile production, model farms, transfer of technology, human resource development as well as the strengthening of extension services.
Aquaculture has also received a substantial amount of government investment over the past decades and facilities are now in place that can provide the basis for a major future expansion in aquaculture production.
With the exception of trout culture in NWFP and the northern region, virtually all aquaculture currently carried out in Pakistan is pond culture of various carp species. Pakistan has not yet begun any coastal aquaculture operations although there is good potential all along Pakistan's 1 100 km coastline. Efforts have been made in the past to start shrimp farming along Sindh coast, which did not succeed, the main constraints being the non-availability of hatchery produced seed and a lack of expertise.
Freshwater fish culture in earthen ponds, both small and large reservoirs as well as community ponds was initiated in late 1960s by the provincial fisheries departments. From 1980 onwards the polyculture of Indian major carps and Chinese carps has been carried out in Punjab, Sindh and to some extent in NWFP.
According to the latest estimates, the total area covered by fish ponds across all provinces is about 60 470 ha, with Sindh having 49 170 ha, Punjab 10 500 ha, NWFP 560 ha and the other provinces (Balochistan, Azad Jammun Kashmir [AJK] and Northern Area [NA]) 240 ha.1.2Human resources:About 13 000 fish farms have so far been established across Pakistan, the size of these farms varies considerably, however, the average farm size ranges form 5-10 ha. No direct data on the number of fish farmers employed in this sector is available as fish farming in most parts of the country is carried out as an integral part of crop farming. According to a best estimates, about 50 000 people are either directly or indirectly employed in the sector.

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