scholarly journals Embryonic and larval development of Gobius paganellus (Pisces: Gobiidae)

2003 ◽  
Vol 83 (5) ◽  
pp. 1151-1156 ◽  
Author(s):  
Rita Borges ◽  
Cláudia Faria ◽  
Fátima Gil ◽  
Emanuel J. Gonçalves ◽  
Vitor C. Almada
Keyword(s):  
Embryonic Development ◽  
Larval Development ◽  
Developmental Sequence ◽  
Body Form ◽  
Total Length ◽  
Controlled Conditions ◽  
Western European ◽  
Newly Hatched Larvae ◽  
Embryonic And Larval Development

The full developmental sequence from egg to juvenile of Gobius paganellus under controlled conditions is described. Embryonic development lasted 9–10 days at 18.5–20.0°C and 10–11 days at 15.0–16.5°C. Newly hatched larvae measured 3.90 mm, had the mouth and anus opened, pigmented eyes and almost no yolk. They first settled 25 days after hatching (10.0–10.5 mm total length [TL]) and showed juvenile behaviour and body form 36 days after hatching (14.0 mm TL). However, they only showed full juvenile pigmentation patterns 15 days later (17.0 mm TL) (16.0–16.5°C). In addition, a preliminary differentiation between the newly hatched larvae of the most common Gobius species of south-western European shores is presented.

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 Ontogenetic development of Lipophrys trigloides (Pisces: Blenniidae), with some notes on the spawning behaviour

2005 ◽  
Vol 85 (1) ◽  
pp. 185-188 ◽  
Author(s):  
Cláudia Faria ◽  
Fátima Gil ◽  
Vítor C. Almada
Keyword(s):  
Embryonic Development ◽  
Related Species ◽  
Ontogenetic Development ◽  
Developmental Sequence ◽  
Total Length ◽  
Controlled Conditions ◽  
Spawning Behaviour ◽  
Newly Hatched Larvae ◽  
Eggs And Larvae

The full developmental sequence from egg to juvenile of Lipophrys trigloides in controlled conditions is described. In addition, some notes on the spawning behaviour of adults are provided. Embryonic development lasted 13–14 days at 21·00–23·00°C, 16–17 days at 17·25–18·50°C and 17–18 days at 14·00–16·50°C. Newly hatched larvae measured 4·8 mm, had the mouth and anus opened, pigmented eyes and almost no yolk. Most larvae settled between day 39 and 42 after hatching at 16·0–17·0 mm total length (TL) and showed full juvenile pigmentation patterns and behaviour 5 to 10 days later (17·0–18·0 mm TL). A summary of the characteristics of the eggs and larvae that may help in the distinction between L. trigloides and Lipophrys pholis, a very close related species, is also provided.

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

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.

Neurogenesis in the thoracic neuromeres of two crustaceans with different types of metamorphic development

1998 ◽  
Vol 201 (17) ◽  
pp. 2465-2479 ◽  
Author(s):  
S Harzsch ◽  
J Miller ◽  
J Benton ◽  
RR Dawirs ◽  
B Beltz
Keyword(s):  
Embryonic Development ◽  
Larval Development ◽  
Neuronal Development ◽  
Temporal Patterns ◽  
Homarus Americanus ◽  
Spider Crab ◽  
Larval Life ◽  
Larval Stages ◽  
Metamorphic Development ◽  
Embryonic And Larval Development

The mode of embryonic and larval development and the ethology of metamorphosis in the spider crab and the American lobster are very different, and we took advantage of this to compare neuronal development in the two species. The goals of this study were to discover whether the differences in the maturation of the neuromuscular system in the pereopods and the metamorphic changes of motor behavior between the two species are reflected at the level of the developing nervous system ('neurometamorphosis'). Furthermore, we wanted to broaden our understanding of the mechanisms that govern neuronal development in arthropods. Proliferation of neuronal stem cells in thoracic neuromeres 4-8 of the lobster Homarus americanus and the crab Hyas araneus was monitored over the course of embryonic and larval development using the in vivo incorporation of bromodeoxyuridine (BrdU). Neuropil structure was visualized using an antibody against Drosophila synapsin. While proliferation of neuronal precursors has ceased when embryogenesis is 80 % complete (E80%) in the lobster thoracic neuromeres, proliferation of neuroblasts in the crab persists throughout embryonic development and into larval life. The divergent temporal patterns of neurogenesis in the two crustacean species can be correlated with differences in larval life style and in the degree of maturation of the thoracic legs during metamorphic development. Several unusual aspects of neurogenesis reported here distinguish these crustaceans from other arthropods. Lobsters apparently lack a postembryonic period of proliferation in the thoracic neuromeres despite the metamorphic remodeling that takes place in the larval stages. In contrast, an increase in mitotic activity towards the end of embryonic development is found in crabs, and neuroblast proliferation persists throughout the process of hatching into the larval stages. In both E20% lobster embryos and mid-embryonic crabs, expression of engrailed was found in a corresponding set of neurons and putative glial cells at the posterior neuromere border, suggesting that these cells have acquired similar specific identities and might, therefore, be homologous. None of the BrdU-labeled neuroblasts (typically 6-8 per hemineuromere over a long period of embryogenesis) was positive for engrailed at this and subsequent stages. Our findings are discussed in relation to the spatial and temporal patterns of neurogenesis in insects.

First studies of embryonic and larval development of Coilia nasus (Engraulidae) under controlled conditions

2010 ◽  
Vol 42 (4) ◽  
pp. 593-601 ◽  
Author(s):  
Gangchun Xu ◽  
Xue Tang ◽  
Chengxiang Zhang ◽  
Ruobo Gu ◽  
Jinliang Zheng ◽  
...  
Keyword(s):  
Larval Development ◽  
Coilia Nasus ◽  
Controlled Conditions ◽  
Embryonic And Larval Development

embryonic and larval development of the malabar grouper, epinephelus malabaricus (pisces: serranidae)

2005 ◽  
Vol 85 (5) ◽  
pp. 1249-1254 ◽  
Author(s):  
ming-yih leu ◽  
chyng-hwa liou ◽  
lee-shing fang
Keyword(s):  
Larval Development ◽  
Larval Habitat ◽  
The Body ◽  
Tank Bottom ◽  
Newly Hatched Larvae ◽  
First Time ◽  
Embryonic And Larval Development ◽  
H 30 ◽  
Epinephelus Malabaricus ◽  
Pelvic Fin

the embryonic and larval development of epinephelus malabaricus are described and illustrated for the first time. fertilized eggs, with a mean diameter of 0.90±0.02 mm and a range from 0.87 to 0.93 mm, were spherical, transparent, buoyant and unpigmented. embryonic development lasted 26 h 30 min at 25.5°c. newly hatched larvae were 1.93±0.04 mm in total length (tl) with 26 (11+15) myomeres and had an oil globule in the ventroposterior area of the yolk sac. three days after hatching (2.76 mm tl), the mouth opened. early larvae had two clusters of well-developed melanophores appearing on the alimentary canal and at the caudal region of the body, and the appearance of xanthophores on the dorsal finfold. nine days after hatching (4.04 mm tl), the buds of the second dorsal and pelvic fin spines had appeared. at 5.41 mm tl, the notochord was slightly flexed, and the hypural bones and caudal fin rays had begun to develop. at 7.39 mm tl, the ratios of the second dorsal and pelvic-fin spine lengths to tl attained their maximums, 52.68% and 48.62%, respectively. at 20.19 mm tl, all fins had the adult complement of rays and spines. by 30.18 mm tl, the body had become red, with five irregular, oblique, dark brown bars visible on the body. the larval habitat shifted from the surface and middle layers to the tank bottom.

Embryonic and larval development and segment formation in Ibla quadrivalivis Cuv. (Cirripedia).

1965 ◽  
Vol 13 (1) ◽  
pp. 1 ◽  
Author(s):  
DT Anderson
Keyword(s):  
Embryonic Development ◽  
Larval Development ◽  
Larval Growth ◽  
Growth Zone ◽  
Larval Survival ◽  
Direct Development ◽  
Gut Development ◽  
Free Swimming ◽  
Phylogenetic Affinity ◽  
Embryonic And Larval Development

Embryonic development in I. quadrivalvis follows the typical cirripede pattern except for modifications of cleavage and of development of the gut, associated with a large yolky egg. The nauplius is free-swimming but lecithotrophic. It does not grow, and moults irregularly. The development of cypris features begins precociously and the second half of naupliar life is demersal. The cypris stage is unmodified. Settling was not observed. The maxillary segments develop as a delayed continuation of the naupliar segmental sequence, the thoracic segments from a growth zone of seven ectoteloblasts and eight mesoteloblasts. Each row of eight cells budded from the mesoteloblasts develops into the paired somites of a segment. The midgut develops independently of the yolk cells. In cirripedes, increased yolk results in modification of cleavage and gut development but otherwise has little influence on embryonic development. Larval modifications associated with lecithotrophy promote direct development of the cypris but do not include modification of the cypris. Irregularity of moulting is associated with lack of larval growth. Relative brood sizes suggest that increased yolk in cirripedes offers advantages in larval survival. Post-naupliar segment formation in cirripedes resembles in detail that of Malacostraca, indicating a possible phylogenetic affinity between Malacostraca and Maxillopoda which can be tested by further studies on segment formation in non- Malacostraca.

scholarly journals Embriogenesis and larval ontogeny of the "piau-gordura", Leporinus piau (Fowler) (Pisces, Anostomidae) after induced spawning

2004 ◽  
Vol 21 (1) ◽  
pp. 117-122 ◽  
Author(s):  
Fábio Luiz Borçato ◽  
Nilo Bazzoli ◽  
Yoshimi Sato
Keyword(s):  
Embryonic Development ◽  
Water Temperature ◽  
Larval Development ◽  
Exogenous Feeding ◽  
Histological Techniques ◽  
Final Development ◽  
Complete Absorption ◽  
Vegetative Pole ◽  
Males And Females ◽  
Embryonic And Larval Development

Mature males and females of Leporinus piau (Fowler, 1941) were induced to reproduce through a hypophysation process. Extrusion occurred 12 h or 312 hours-degree after the hypophysation, at a water temperature of 26°C. Fertilized eggs were maintained in incubators at 24°C. Embryonic development, was evaluated using every 10 minutes, fresh egg samples which were analyzed under stereoscopic microscope. The larvae were collected at 24-hour intervals for seven days after hatching, fixed in Bouin's fluid and were submitted to routine histological techniques. The eggs of L. piau were slightly gray, non-adhesive and round-shaped. After 1.5 h the embryo was at the 64-blastomere phase and showed a wide yolk region on the vegetative pole. Within 6.25 h, blastopore closure and the end of gastrula was observed. The differentiation of layers occurred after 7.5 h and hatching after 21 h after fertilization at 24°C or 504 hours-degree. During the first three days of the larvae development there was a gradual yolk sac reduction until its complete absorption on the fourth day, indicating the necessity of exogenous feeding. From the fourth to the seventh day, the final development of the heart, gill arches, swimblader, kidney, hepatopancreas, stomach and intestine were observed. The embryonic and larval development of L. piau were similar to other Anastomidae species.

Characterization and expression patterns of wnt4 in Exopalaemon carinicauda (Holthuis, 1950) (Caridea, Palaemonidae) during embryonic and larval development

Crustaceana ◽  
2019 ◽  
Vol 92 (1) ◽  
pp. 83-94
Author(s):  
Jian Hua Chen ◽  
Meng Jie Wang ◽  
Xue Li ◽  
Hai Hua Wang ◽  
Huan Gao ◽  
...  
Keyword(s):  
Embryonic Development ◽  
Larval Development ◽  
Developmental Stages ◽  
Integration Site ◽  
Expression Patterns ◽  
Exopalaemon Carinicauda ◽  
Cell Stage ◽  
Larval Stages ◽  
Cell Proliferation And Differentiation ◽  
Embryonic And Larval Development

Abstract Wnt4 (Wingless-type MMTV integration site family member 4) has been demonstrated to play critical roles in a wide variety of biological processes, including embryonic development, cell proliferation, and differentiation in vertebrates, but its function in crustaceans is still not clear. In the present study, the full-length wnt4 cDNA sequence was cloned and characterized for the ridgetail white prawn Exopalaemon carinicauda. The expression patterns of the wnt4 mRNA in embryos and larvae at different stages were investigated. The tissue distribution showed that wnt4 was obviously expressed in eyestalk and hepatopancreas. During embryonic development, the wnt4 was highly expressed in all developmental stages except the zygote, two-cell stage, and late zoaea stage. The wnt4 mRNA was expressed in Z1-Z5 and post-larval stages. Taken together, the present study indicates that the wnt4 gene may be involved in the regulation of embryonic and larval development in the ridgetail white prawn.

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