Investigating The Long-line Nursery System For Giant Clam
Chapter One
Preface
Background To The Study
Long- line nursery systems are protean enough to handle a wide range of nursery systems for bones ( Braley, 1999). Nursery parenting as well as grow- out can be fulfilled on long- lines. Servers, tube modules and bags or coops can be hung in deep water for nursery parenting of bones . According to Braley( 1999), seeded lines or socks( with acceptable bloodsucker protection handed by modified lantern nets girding them) are generally suspended from long- lines. Generally used, largely productive and effective, long- line nursery systems are flexible enough to handle a variety of shellfish species including bones and colorful grow- out and gather styles. These systems are preferred in high exposure areas. Layout of a long- line nursery system depends veritably much on point characteristics. The most significant point from the point of view of security and stability is the vacuity of reinforcement that can be employed for anchoring one end of the long- line. In some locales both ends can be fixed to the reinforcement avoiding the need for anchoring in deep water. Anchoring long- lines securely in deep water at both ends is also generally done in spots where reinforcement anchoring isn’t possible or desirable( Adams, 2003). Length of the line depends entirely on the point itself.
With a large point, lines can be over 100m long which permits working along the lines with smaller time- consuming transitions from one line to the coming. For utmost long- line systems, the vertical long- line( or “ backbone ”) consists of a1/2 ″ to 1 ″ poly rope. To this the docks and tubes or servers areattached.However, the result will be lost docks, lost stock or both( Lucas, If this isn’t done precisely. Long- line nursery systems are generally constructed either in a face or subterranean array. Subsurface long- lines nursery system can be erected so that the entire system( docks and vertical long- line) is below the face( sunken). This is generally done in bone husbandry to help face agitation from affecting the nets or coops and to place nursed bones in deep water where temperature and saltness are fairly stable. Subsurface long- lines are also constructed so that the flotation is on the face but the vertical long- line is0.5 m or further below the face( Lucas, 2001). Long- lines nursery systems for bones are fixed to reinforcement by means of galvanized reinforcement legs which must be forced into holes drilled into oceanfront gemstone. In utmost cases it’ll not be possible to attach both ends of a long- line to shore legs. generally one- to two- ton concrete blocks, with anchor eye to attach the line, are used to secure the deep water end( s) of the line( Shang, 1998). sword anchors analogous to boat anchors(e.g. a plow type anchor) are also used to secure the line and the type will vary according to the bottom conditions on the point.
Depending on the length of line and the layout, further than one line can be attached to each anchor. To help inordinate slack in the long- lines concrete weights, smash chain or pail of jewels is generally attached to the anchorline.However, it may be possible to construct a floating cape to cover the point from rough water and storm conditions( Adams, 2003), If point terrain permits. With this protection, the lines are nearly always accessible to the crew on the skiff to transport the servers to and from the line. A piece of styrofoam is rammed into the inside of the tire and the tires are strapped together in staggered rows to form a cape which, in this case is reinforcement anchored on one end and deep water anchored on the other. In giant bone nursery system, aeration is important for its mixing parcels rather than for the provision of oxygen, except maybe in the embryonic and early larval stages when both good mixing and oxygen are demanded. For mixing, it’s wiser to use a diffuser with larger, coarser bubbles rather than one with veritably fine bubbles, which could beget gas supersaturation( total feasts, especially nitrogen) which is murderous in the case of giant bones . Although bivalve molluscs can handle lower situations of oxygen than utmost other monoculture creatures it isn’t wise to attempt supersaturation( Braley, 1999). There are two main styles of aeration which are graveness aerators and submerged aerators. The graveness aerators are cheaper and in utmost cases supply the oxygen needs for both hatchery and land nursery tanks, but they don’t give mixing. An automatic mixing paddle fitted to each tank is needed in combination with a graveness aerator system. Submerged aerators are presumably more cost effective. This system of aeration may use air compressors or air boasters. Many hatcheries now use air compressors because there’s a peril of oil painting oohing through rings and seals and getting into the air. Also, high pressure air isn’t generally demanded and can beget problems similar as supersaturation. Rootes type air boasters are the air cracker of choice. Heslinga etal.( 1990) recommend Sweetwater boasters for their trustability, erosion resistance and quietness. Air boasters give low pressure and high volumes of air; perfect for shallow nursery or hatchery tanks.
Statement Of The Problem
mammoth bones have long represented a precious resource to the people in utmost part of the world in the form of a readily available and nutritional food source. still, in moment’s cash driven husbandry, giant bones have also come to represent a source of import income in numerous countries that involve in its husbandry. Current uses for ranch- produced giant bones include; stock improvement, terrarium faves , natural samples, food and shellcraft. Several styles have been used for its hatching and nursery but this system is concentrated on examinations on the long- line nursery system for giant bones .
Objects Of The Study
The following are the objects of this study
1. To examine the approaches to giant bones nursery.
2. To probe the long- line nursery system for giant bones .
3. To identify the advantages and limitations in the long- line nursery system for giant bones .
Exploration Questions
1. What are the approaches to giant bones nursery?
2. What are the procedures and processes involved in the long- line nursery system for giant bones ?
3. What are the advantages and limitations in the long- line nursery system for giant bones ?
Significance Of The Study
The following are the significance of this study
1. outgrowth of this study will educate on the easier system for the nursery of giant bones for advanced system of product and better yield.
2. This exploration will be a donation to the body of literature in the area of the effect of personality particularity on pupil’s academic performance, thereby constituting the empirical literature for unborn exploration in the subject area
Compass/ Limitations Of The Study
This study will cover the colorful approaches and systems of giant bone nursery with special focus and trial on the long- line nursery systems for giant bones .
Limitation Of Study
Financial constraint-inadequate fund tends to stymie the effectiveness of the experimenter in sourcing for the applicable accoutrements , literature or information and in the process of data collection( internet, questionnaire and interview).
Time constraint- The experimenter will contemporaneously engage in this study with other academic work. This accordingly will cut down on the time devoted for the exploration work.
References
Adams,T. 2003. Giant bones in Fiji. South Pacific Commission Factory on Inshore Fishery coffers, Noumea, New Caledonia. March 2003. Background Paper 50.
Braley,R.D. 1999. Homemade for the culturing of giant bones . PublIcation of James Cook University, 108p. Heslinga.G.A., Watson,T.C. and Isarnu,T. 1990. Giant levee husbandry. Pacific Fisheries Development Foundation( NMFS/ NOM). Honolulu,
HawaII. 179 pp. Lucas,J.S. 2001. Giant bones description, distribution and life history. In Copland,J.W., and Lucas,J.S.,ed., Giant heads In Asia and the Pacific. Canberra, AClAR MonographNo. 9. 21- 31.
Shang,V.C. 1998. Monoculture economics introductory generalities and styles of analysis. Boulder, Colorado, Westvlew Press.