Fish harvesting

Farmed fish may be harvested in many ways that, either from a lake crammed with water, or drained, per your wants and circumstances.

2. you'll need to crop fish while not debilitating the water entirely (see Section eleven.1):

in ponds that cannot be drained by gravity, unless you are prepared to use a water pump;

whenever you wish to create a partial harvest by capturing the biggest fish to skinny out the stock, increasing living space and availability of natural food for the fish left

in the pond;

for monitoring your fish stock regularly, for example checking on their growth and the food conversion efficiency (see Sections 16.1 and 16.2);

for management functions like fishing brooders from broodstock ponds for spawning or cropping grill from spawning ponds wherever mature fish square measure left breeding on 3.

endless your fish by In such case, all the fish present are removed from it, being harvested either inside the pond or outside.

You will learn more about these methods in Sections 11.2 and 11.3.

4. The thanks to harvest a lake additionally greatly depends on the type of fish it ought to yield.

(a) If it ought to yield live fish like juveniles for stocking, brooders for spawning, or table fish to be sold alive:

during harvest, stress to the fish should be reduced to a minimum, and

after harvest, fish ought to be transferred to smart water as shortly as doable, for transport and, if necessary, for storage.

Bangladeshi folks area unit popularly spoken as "Macche-Bhate Bangali" or "fish and rice makes a Bengali." Rice and fish are a necessary a part of the lifetime of Bangladeshi folks from past times. Rice farming is that the single most significant support for a huge majority of the agricultural poor. The annual rice production is calculable to be twenty six.53 million tons1, whereas fish production is a pair of.32 million tons2. The demand for rice and fish is continually rising, with the population increasing by quite 3million folks annually. However, the land offered for rice and fish farming isn't increasing. nonetheless, fish farming in rice fields offers an answer to the current downside, contributory to food production and financial gain generation.


Photo: Silver carp could be a common species for each farming systems.
The total space of rice fields in East Pakistan is concerning ten.14 million angular distance and there area unit an additional a pair of.83 million angular distance of seasonal rice fields wherever water remains for four to 6 months of the year3,4. These inundated rice fields will play a very important role in increasing fish production through integration of cultivation. There area unit many positive effects of fish farming in rice yields. Integrated rice-fish production will optimise resource use through the complementary activity of land and water5. Integration of fish with rice farming improves diversification, intensification, productivity and sustainability6,7,8. Rice-fish farming is additionally being thought to be a very important approach to integrated pesterer management (IPM).

The adoption of rice-fish farming in East Pakistan remains rather marginal thus far thanks to socioeconomic, environmental, technological and institutional constraints9. historically wild fish are harvested from rice fields. The revolution of agriculture has become a constraint for the event of rice-fish farming. With the introduction of high yielding varieties (HYV) of rice, the pesterermanagement strategy has most popular chemical pesticides10,11. nonetheless, reducing chemical has taken place through IPM. The introduction of IPM with fish farming in rice fields changing into quality in several Asian countries, like China, Philippines, Kingdom of Thailand and Vietnam12.

In order to extend food production, alittle variety of farmers were inspired to require up rice-fish farming in East Pakistan. nonetheless, variety of problems area unit vital for rice-fish farming together with production technology, socioeconomic and environmental aspects. This paper highlights key problems for property rice-fish farming, to satisfy challenges for food security for the folks of East Pakistan.

Methodology
Field analysis was conducted for a amount of six months from December 2007 to might 2008. The analysis style enclosed choice of the study space, identification of target teams and choice of analysis tools for information assortment. the tactic of knowledgeassortment depends upon the character, aim and objectives of the study. choice of specific technique depends on nature of the analysis issues, length of munition and distance of the analysis web site. so as to assess the rice-fish farming systems relevant to farmers' ideas and understanding, a democratic analysis technique was used. the key advantage of this technique is that its coverage is far wider. However, one amongst the key risks is that the investigation has got to rely alone upon the memory of the respondents. This was, however, overcome by applying a mix of knowledge assortment strategies.

Figure 1. analysis style for field survey of rice fish farming


The study was conducted within the Mymensingh space of north-central East Pakistan that is one amongst the rice bowls of the country. Geographically Mymensingh has been known because the most significant and promising space for rice-fish culture, due tofavourable resources and climate, like the provision of low-lying agricultural land, heat climate, fertile soil, and low-cost and plentifullabour. Hydrological conditions also are favourable for rice-fish farming as this space is found among the monsoon tropics with a median annual downfall of two,500 mm13. Moreover, conditions area unit extremely encouraging for the growth of rice-fish farming because the amount of fish seed made has up chop-chop in recent years from around seventy non-public hatcheries. nonetheless, alittle variety of farmers (around 100) area unit concerned in rice-fish farming in Gauripur and Phulpur sub-districts. These farmers received coaching from the Mymensingh cultivation Extension Project, funded by Danish International Development help. Gauripur and Phulpur sub-districts were so elect for the study.

A combination of democratic, qualitative and quantitative strategies was used for primary information assortment. a complete of eighty rice-fish farmers, forty in every sub-district, were interviewed at their homes and/or farm sites. The interviews, lasting concerning associate degree hour, targeted on rice-fish farming systems, culture practices, productivity and constraints of rice-fish farming. A democratic Rural Appraisal tool - focus discussion (FGD) was conducted with rice-fish and rice-only farmers to getqualitative info. FGD sessions were control ahead of village outlets, underneath massive trees, in farmers' homes and on collegepremises, wherever participants might sit, feel comfy and were simply ascertained. Finally, see to it interviews were conducted with district and sub-district fisheries officers, agricultural extension officers, college lecturers, researchers, policy manufacturers and relevant non-government organisation (NGO) staff. information from form interviews were analysed exploitation Microsoft stand outcomputer code to supply descriptive statistics.

Farming systems

Photo: A typical motion rice-fish farm, Bangladesh.
There area unit 2 varieties of rice-fish farming systems within the Mymensingh space counting on the supply of fish: culture and capture. within the capture system, wild fish enter the rice fields from adjacent floodplains throughout the monsoon and reproduce in inundated rice fields. On the opposite hand, rice fields area unit deliberately furnished fish within the culture system. Fish farming in rice fields will be generally classified as synchronal (integrated) and motion (alternate). within the synchronal system, rice and fish area unit fully grown along, whereas within the motion system they're fully grown alternately. in line with the survey, fifty four of farmers practiced synchronal rice-fish farming and therefore the rest (46%) cultivated rotationally. In general, the synchronal rice-fish culture system is practiced in plain-lands and medium lowlands, whereas the motion system is performed in deeply flooded lowlands. the common farm size was found to be zero.33 angular distance and zero.29 angular distance within the synchronal and motion system, severally.