Histological Investigation of Swim-bladder Morphology and Inflation in Cultured Larval Striped Trumpeter (Latris lineata) (Teleostei, Latridae)

1996 ◽  
Vol 47 (2) ◽  
pp. 251 ◽  
Author(s):  
A Goodsell ◽  
D Wikeley ◽  
L Searle
Keyword(s):  
Vascular System ◽  
Culture Conditions ◽  
Columnar Epithelium ◽  
Swim Bladder ◽  
Histological Techniques ◽  
First Feeding ◽  
Gas Gland ◽  
Swim Bladder Inflation ◽  
Latris Lineata ◽  
Striped Trumpeter

Histological techniques revealed that primary swim-bladder inflation in Latris lineata, a Tasmanian marine finfish, occurred before first feeding (Days 6 to 8 after hatch, depending on culture conditions). The histological appearance of the swim-bladder altered markedly after inflation; the lumen lining changed from columnar epithelium to predominantly squamous epithelium with an anterior crescent of cuboidal epithelial cells forming the gas gland. The pneumatic duct traversed ventrally from the posterior end of the swim-bladder and entered the intestine at the junction of the oesophagus and the intestine. The columnar epithelium persisted in non-inflated swim-bladders, and proliferation of the underlying vascular system caused the epithelium to fold and fill the entire lumen.

The Development of Form and Function in Fishes and the Question of Larval Adaptation

2004 ◽  
Keyword(s):  
Fish Larvae ◽  
Anguilla Anguilla ◽  
Pressure Head ◽  
Swim Bladder ◽  
Form And Function ◽  
Gland Cells ◽  
First Feeding ◽  
Gas Gland ◽  
Swim Bladder Inflation ◽  
And Function

<em>Abstract.</em>—The swim bladder originates as an unpaired dorsal outgrowth of the posterior foregut. While in physostome fish the embryonic connection to the pharynx persists, in physoclist fishes, it is lost during early development. In most fish larvae, the swim bladder is inflated shortly after hatching, just prior to the time of first feeding. At this time, many larvae swim up and start surfacing. In this case, initial inflation of the swim bladder is achieved by gulping air, and a lack of swim bladder inflation often is accompanied by a significant reduction of viability. While this appears to be the way most physostome fish inflate their swim bladder, some species obviously are able to inflate the swim bladder without surfacing. In adult fish, gas secretion into the swim bladder requires the activity of gas gland cells, which acidify the blood and thus induce a decrease in its gascarrying capacity. In consequence, gas partial pressures increase, providing a pressure head for the diffusive transport of gas from the blood into the swim bladder. Recent studies on the European glass eel <em>Anguilla anguilla </em>suggest that, at the time of first inflation, gas gland cells may not yet be functional. Nevertheless, glass eels can inflate their swim bladder without surfacing. Although various mechanisms have been proposed to explain the inflation of the swim bladder without gulping air, a decisive answer cannot yet be presented.

Buoyancy control and diel changes in swim-bladder volume in cultured striped trumpeter (Latris lineata) larvae

2005 ◽  
Vol 56 (4) ◽  
pp. 361 ◽  
Author(s):  
A. J. Trotter ◽  
S. C. Battaglene ◽  
P. M. Pankhurst
Keyword(s):  
Diel Cycle ◽  
Bladder Volume ◽  
Dark Phase ◽  
Swim Bladder ◽  
Body Density ◽  
Buoyant Force ◽  
First Feeding ◽  
Swim Bladder Inflation ◽  
Striped Trumpeter ◽  
Buoyancy Control

Body density, swim-bladder volume, buoyant force and feeding in relation to growth, photoperiod and light intensity were investigated in cultured striped trumpeter larvae. Prior to initial swim-bladder inflation, body density was negative during both the light and dark phases, regulated on a diel cycle from 1.0275 to 1.0290 g cm−3 (seawater: 1.0265 g cm−3). After initial swim-bladder inflation, body density decreased markedly during the dark phase as swim-bladder volume increased on a diel cycle. Downward buoyant force from dry matter increased with age and was compensated for by increasing relative swim-bladder volume. Greatest difference in body density between light (1.0260 g cm−3) and dark phase (1.0245 g cm−3) was when larvae were from 6.5 to 7.5 mm (standard length) (seawater: 1.0260 g cm−3). Density of larvae without a functional swim bladder was always greater than larvae with a functional swim bladder, and the former had reduced growth. Diel buoyancy control exhibited by striped trumpeter larvae with low amplitude changes in swim-bladder volume is similar to other transient physostomes. Mortality events previously observed in striped trumpeter culture are possibly related to negative buoyancy before first feeding and positive buoyancy during the dark phase following initial swim-bladder inflation.

Swim bladder malformation in hatchery-reared striped trumpeter Latris lineata (Latridae)

Aquaculture ◽  
2001 ◽  
Vol 198 (1-2) ◽  
pp. 41-54 ◽  
Author(s):  
A.J. Trotter ◽  
P.M. Pankhurst ◽  
P.R. Hart
Keyword(s):  
Swim Bladder ◽  
Latris Lineata ◽  
Striped Trumpeter

Effect of light intensity on feeding of striped trumpeter Latris lineata larvae

1998 ◽  
Vol 49 (5) ◽  
pp. 363 ◽  
Author(s):  
Patricia M. Pankhurst ◽  
Pollyanna E. Hilder
Keyword(s):  
Light Intensity ◽  
Feeding Response ◽  
Ontogenetic Changes ◽  
Fish Feeding ◽  
First Feeding ◽  
Light Intensities ◽  
Latris Lineata ◽  
Striped Trumpeter ◽  
Dependent Behaviour ◽  
Effect Of Light

This study investigates the influence of light intensity on feeding of striped trumpeter larvae, correlating feeding responses with changes in morphology of the retina during growth. A pigmented single-cone retina had differentiated one day before first feeding, and rod precursor cells and double cones were visible in the retina on the 23rd, and 25th day after hatching, respectively. Feeding performance at four light intensities (0, 1, 30, 150 and 700 lux), revealed that striped trumpeter larvae are primarily dependent on vision, a light-dependent behaviour, to feed. The youngest larvae tested (15, 18 and 19 days of age) showed a poor feeding response at 1 lux (range 2–10%), but a 98–100% feeding response at 30, 50 and 700 lux. By 28 days of age, feeding behaviour had changed significantly, with 52% of fish now feeding at 1 lux, 100% of fish feeding at the intermediate light intensities of 30 and 150 lux, and only 62% of fish feeding at 700 lux. The apparent increased photopic sensitivity in 28-day-old fish may reflect increased areas for photon capture provided by double cones, or may reflect ontogenetic changes in cone spectral sensitivity.

Performance and skeletal abnormality of striped trumpeter Latris lineata larvae and post larvae fed vitamin A enriched Artemia

Aquaculture ◽  
2014 ◽  
Vol 422-423 ◽  
pp. 115-123 ◽  
Author(s):  
Reham K. Negm ◽  
Jennifer M. Cobcroft ◽  
Malcolm R. Brown ◽  
Barbara F. Nowak ◽  
Stephen C. Battaglene
Keyword(s):  
Vitamin A ◽  
Skeletal Abnormality ◽  
Latris Lineata ◽  
Striped Trumpeter
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