scholarly journals Influences of Salinity on Embryonic and Larval Development of Striped Catfish Pangasianodon hypophthalmus

2021 ◽  
Vol 8 ◽  
Author(s):  
Farzana Hossain ◽  
S. M. Majharul Islam ◽  
Mohammad Ashaf-Ud-Doulah ◽  
Md Shaha Ali ◽  
Md Sadiqul Islam ◽  
...  
Keyword(s):  
Larval Development ◽  
Yolk Sac ◽  
Salinity Intrusion ◽  
Swim Bladder ◽  
Pangasianodon Hypophthalmus ◽  
Lc50 Value ◽  
Different Types ◽  
Striped Catfish ◽  
Swim Bladder Inflation ◽  
Embryonic And Larval Development

Salinity intrusion in coastal areas due to climate change is alarming. In this study, the effects of salinity on embryonic and larval development of striped catfish (Pangasianodon hypophthalmus) were studied experimentally. Embryos and larvae were exposed to seven salinity treatments (0, 2, 4, 6, 8, 10, and 12 ppt), each with three replications. Considerable survivability of embryos was recorded up to 6 ppt salinity. Mortality of embryos significantly increased at 8 and 10 ppt salinity, and 100% mortality was displayed within 12 h of exposure at 12 ppt salinity. The rate of hatching was significantly reduced at 8 and 10 ppt salinity. The 24 h lethal concentration (LC50) value of salinity for embryo was 11.24 ppt. Different types of deformities, such as undeveloped yolk sac, elongated gastrula yolk sac, and yolk sac bud, were highest at 10 ppt salinity. Similar to the embryo, considerable survivability of larvae was recorded up to 6 ppt salinity, and 100% mortalities were found within 24 h of exposure at 12 ppt salinity. The 24 and 48 h LC50 values of salinity for larvae were 10.63 and 8.48 ppt, respectively. Several types of deformities, including yolk sac ulceration, spine scoliosis, tail bent, yolk sac edema, and compromised swim bladder inflation, were highest at 10 ppt salinity after 48 h of exposure. Within 24 h of exposure, about 80% yolk sac of the larvae was absorbed at 8 and 10 ppt salinity, while 30%–50% yolk sac was absorbed at 0–6 ppt salinity. Growth rates in terms of length and weight were higher at 0, 2, and 4 ppt salinity and moderate at 6 and 8 ppt salinity. Overall, the current findings define the limits to optimize hatchery procedures for the culture of this species in low saline brackish water.

scholarly journals Embryonic and Larval Development of Thai Pangas Pangasianodon Hypopthalmus (Sauvage, 1878) Under Hatchery Condition

2021 ◽  
Vol 49 (1) ◽  
pp. 147-159
Author(s):  
BK Chakraborty ◽  
DK Jha
Keyword(s):  
Larval Development ◽  
Yolk Sac ◽  
Tail Region ◽  
Pangasianodon Hypophthalmus ◽  
Management Technology ◽  
Embryonic Shield ◽  
Newly Hatched Larvae ◽  
Spawning Periods ◽  
Embryonic And Larval Development ◽  
Egg Capsule

The embryonic and larval development of Pangasianodon hypophthalmus was investigated during peak spawning periods (May-July 2019). The fertilized eggs were adhesive and spherical with a greenish‐brown egg capsule. The yolk sac was yellowish‐brown in color and 1.00–1.70 mm in diameter. The first cleavage stage, embryonic shield, head, tail region, neural grooves and somites were apparent after fourteen hours post‐fertilization. The ranges of incubation period were from 18.00-20.00 hrs at a temperature of 26-30°C. The newly hatched larvae were transparent and light yellowish in color with a body length of 2.98–3.10 mm. Eye pigment appeared and the heart started to work within 12-16 hrs of hatching. The mouth became well developed at the age of 24 hrs; barbules were prominent, elongated and look like threads. The yolk sac was fully absorbed and the palatine teeth were fully increased during the 3 days pro‐larval stage. The stomach became functional and aerial respiration started after 3 days of larval development. After 72 hrs, the young fry was well‐developed, and appeared an adult, and length was measured up to 7.20±0.02 mm. When daily ration of pangas larvae is insufficient cannibalism was recorded. This study must be supportive for researcher and nursery owner on the biology and ecology of the fish, which might be helpful for appropriate measure of sustainable nursery, rearing and management technology of pangas. Bangladesh J. Zool. 49(1): 147-159, 2021

scholarly journals Embryonic and larval development of guchibaim, Mastacembelus pancalus (Hamilton)

1970 ◽  
Vol 7 (1) ◽  
pp. 193-204 ◽  
Author(s):  
MM Rahman ◽  
MI Miah ◽  
MAH Taher ◽  
MM Hasan
Keyword(s):  
Embryonic Development ◽  
Larval Development ◽  
Digestive System ◽  
Average Length ◽  
Yolk Sac ◽  
Laboratory Conditions ◽  
Total Length ◽  
Embryonic And Larval Development ◽  
Early Gastrula ◽  
Total Average

The embryonic and larval development of local Guchibaim, Mastacembelus pancalus (Hamilton) was studied during May to October 2007. This study presents preliminary observations on the embryonic and larval development of Mastacembelus pancalus under laboratory conditions. The parents stock was collected from different places of Mymensingh district. The eggs were obtained through induction of spawning by use of hormones. At fertilization; the eggs were 0.50 mm in diameter. Samples were taken every 10 minutes interval till completion of morula and then every 1 hour interval up to hatching. After hatching, daily observations took place until the attainment of the fingerling stage. The eggs presented coloration varying from yellow to brownish-green. They were spherical, demersal and adhesive. The stages of embryonic development observed with cleavage, followed by blastula, morula, early gastrula, middle gastrula, late gastrula and until hatching of non-pigmented larvae which displayed total average length of 1.3 mm ± 0.22, 35 hours after fertilization. First cleavage was recorded within 1.05 hrs after fertilization and the embryonic rudiments of developing eggs appeared at 24.30 hrs at 27.0-31.0°C. The yolk sac was completely absorbed at 67 hrs during embryonic development on attainment of 5.50 mm total length. At the same time the digestive system became fully developed and the larvae searched for feeding. Keywords: Embryo; Larvae; Guchibaim; Mastacembelus pancalus DOI: 10.3329/jbau.v7i1.4984 J. Bangladesh Agril. Univ. 7(1): 193-204, 2009

Early life history of the pipefish Nerophis lumbriciformis (Pisces: Syngnathidae)

2003 ◽  
Vol 83 (5) ◽  
pp. 1179-1182 ◽  
Author(s):  
N.M. Monteiro ◽  
V.C. Almada ◽  
M.N. Vieira
Keyword(s):  
Life History ◽  
Larval Development ◽  
Early Life ◽  
Early Life History ◽  
Yolk Sac ◽  
Full Development ◽  
History Of ◽  
Newly Hatched Larvae ◽  
Embryonic And Larval Development

The embryonic and larval development of the pipefish Nerophis lumbriciformis is described. The full development sequence lasted 30 d (at 14–15°C), being shortened to 25–26 d at higher temperatures (16–17°C), and hatching occurred throughout a 2–3 d period. Unlike species of the genus Syngnathus, the newly hatched larvae presented a functional mouth apparatus and the yolk sac completely absorbed.

Embryonic and larval development of the brown wrasse Labrus merula (Pisces: Labridae)

1999 ◽  
Vol 79 (2) ◽  
pp. 327-332 ◽  
Author(s):  
J. Dulčić ◽  
V. Kožul ◽  
M. Kraljević ◽  
B. Skaramuca ◽  
B. Glamuzina ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Larval Development ◽  
Incubation Period ◽  
Yolk Sac ◽  
The Other ◽  
Mean Diameter ◽  
The Difference ◽  
Labrus Bergylta ◽  
Embryonic And Larval Development ◽  
Labrid Species

In March 1997 one male and one female brown wrasse Labrus merula spawned spontaneously in aquaria conditions. Eggs were incubated at ambient temperature, salinity, oxygen and pH. The development of the eggs, yolk-sac larvae and larvae is described and illustrated with particular emphasis on features of practical value for identification of specimens from plankton. The ripe egg of brown wrasse is a typical labrid egg with a mean diameter of 0.93±0.05 mm. The incubation period was 106 h 45 min at a mean temperature of 14.3°C. Newly hatched yolk-sac larvae were 3.8±0.02 mm, while the yolk-sac was resorbed when larvae reached 4.68±0.15 mm in total length. Some characteristics which may be useful for identification are described and compared with some other labrid yolk-sac larvae and larvae. The length of newly hatched yolk-sac larvae of brown wrasse was significantly larger (t-test, P<0.05) than those of the other labrid species, but it is similar to that of Labrus bergylta. During the first 16 d (after resorption of yolk-sac) brown wrasse larvae does not possess a double crescent of melanophores on top of the head, but has a few melanophores on the anal fin which is very similar to the pigmentation of Symphodus (Crenilabrus) melops larvae, although there is a difference in length between them. Larvae older than 16 d have a double crescent of melanophores on the top of the head with melanophores on the anal fin-fold identical to L. bergylta larvae, but the difference in larvae length also exists.

Embryonic and larval development of the tub gurnard Trigla lucerna (Pisces: Triglidae)

2001 ◽  
Vol 81 (2) ◽  
pp. 313-316 ◽  
Author(s):  
J. Dulčić ◽  
L. Grubišić ◽  
I. Katavić ◽  
N. Skakelja
Keyword(s):  
Embryonic Development ◽  
Larval Development ◽  
Yolk Sac ◽  
The Other ◽  
Pectoral Fin ◽  
Total Length ◽  
Identification Of Species ◽  
Newly Hatched Larvae ◽  
Embryonic And Larval Development ◽  
Early Larval Development

The embryonic and early larval development of the laboratory-reared tub gurnard, Trigla lucerna are described. The eggs ranged in diameter from 1·33 to 1·40 mm, with a mean of 1·36±0·236 mm, were pelagic and spherical with a homogeneous and unsegmented yolk. There was single oil globule in the eggs. Globule ranged in diameter from 0·25 to 0·29 mm (mean 0·28±0·012 mm). Embryonic development lasted 115 h 2 min at mean temperature 13·5 °C. Newly-hatched larvae were 3·09±0·014 mm in total length. Absorption of the yolk sac was complete after the sixth day, when larvae reached 4·85±0·015 mm in total length. The only character for identifying eggs among species could be diameter, since the values obtained are lower than those obtained for Eutrigla gurnardus and Aspitrigla cuculus, but larger than those for Trigloporus lastoviza. The length of newly hatched yolk-sac larvae of tub gurnard is significantly lower (t-test, P<0·05) than those of most of the other gurnard species. Characters likely to help in identification of species will probably prove to be the length, shape and pigmentation of the pectoral fin, and the degrees of development of spiny armature on the head.

scholarly journals Ontogeny and morphometrics of the gills and swim bladder of air-breathing striped catfish Pangasianodon hypophthalmus

2017 ◽  
Vol 221 (3) ◽  
pp. jeb168658 ◽  
Author(s):  
Le My Phuong ◽  
Do Thi Thanh Huong ◽  
Hans Malte ◽  
Jens Randel Nyengaard ◽  
Mark Bayley
Keyword(s):  
Swim Bladder ◽  
Air Breathing ◽  
Pangasianodon Hypophthalmus ◽  
Striped Catfish

First attempt of captive breeding, embryonic and larval development of Barilius bendelisis (Hamilton 1807)

2018 ◽  
Author(s):  
Kiran Dube ◽  
Neha Saxena ◽  
Rabindar Singh Patiyal ◽  
Virendra K. Tiwari ◽  
Javaid Iqbal Mir
Keyword(s):  
Body Weight ◽  
Larval Development ◽  
Captive Breeding ◽  
Yolk Sac ◽  
Fish Farm ◽  
Total Length ◽  
Barilius Bendelisis ◽  
Newly Hatched Larvae ◽  
First Time ◽  
Embryonic And Larval Development

The study describes, for the first time, captive breeding, embryonic and larval development of Barilius bendelisis. The captive breeding trial was carried out in April, in fish farm of Directorate of Coldwater Fisheries Research (DCFR), Bhimtal, India using differnet doses of ovatide. The most appropriate dose of ovatide was reported to be 0.3 ml/kg body weight to males and 0.6 ml/kg body weight to females. Fertilized eggs measuring 1.4-1.7 mm were spherical, demersal, and transparent with dark yellow coloured yolk. Hatching occurred 140 -160 hours after fertilization at 19.09°C ± 0.395. Newly hatched larvae were transparent with yellowish yolk reserve, measuring 5.57 - 6.71 mm in total length and characterized by pigmented eye and yolk sac which completely absorbed in 72 hours.

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