• Title/Summary/Keyword: Larval morphology

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Morphology of a Larval Hammerjaw Omosudis lowii Gunther 1887 (Aulopiformes, Omosudidae) Identified by Partial Mitochondrial 12S rRNA Gene Analysis (12S rRNA로 동정한 홍메치목 Omosudis lowii 치어의 형태적 특징)

  • Choi, Hae-young;Jang, Yo-Soon;Oh, Ji-na;Kim, Sung
    • Korean Journal of Ichthyology
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    • v.32 no.4
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    • pp.239-244
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    • 2020
  • The morphological characteristics of a larval fish (7.8 mm in body length) collected off Chuuk, Micronesia were highly similar to those of larval Omosudis sp., except fin development and body length. It was identified as Omosudis lowii by partial mitochondrial 12S rRNA gene analysis. The morphological traits of the larval fish validated by the molecular genetic marker will be informative for species-level identification of larval Omosudis lowii.

Complete Larval Development of a Sand Bubbler Crab, Scopimera longidactyla (Brachyura, Ocypodidae), Reared in the Laboratory (실험실에서 사육된 발콩게 (Scopimera longidactyla (달랑게과) 의 유생발생)

  • 장인권;김창현
    • Animal Systematics, Evolution and Diversity
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    • v.5 no.2
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    • pp.121-137
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    • 1989
  • The larval stages of Scopimera longidactyla reared in the laboratory are described and illustrated in detail. The larval development consists of five zoeal and a megalopal stages. At 25$^{\circ}C$, the megalopa and the first crab instar were attained in 21 and 31 days after hatching, respectively. The larvae of Scopmera can be distinguished from those of other genera in the Scopimerinae and other sumbfamilies in the Ocypodidae by the relativelength of rostral carapace spines to carapace. The larvae of S. longidactyla are similar in morphology to those of S. globosa but distingished by the differences in larval , size, and appendage setation.

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Morphological characteristics of Neural Tissue and Corazonin Neurons of Central Nervous System in Larval Stage of Scuttle Fly

  • Hohyun Park
    • Biomedical Science Letters
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    • v.28 no.4
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    • pp.290-297
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    • 2022
  • Through previous studies, the central nervous system (CNS) was collected by dividing the scuttle fly into larval, pupa, and adult stages by developmental stage, and the morphological characteristics were observed. In situ hybridization (ISH) using the collected central nervous system, it was possible to confirm the location and extent of expression of the neurotransmitter corazonin (Crz) at each stage of development. In this study, paraffin specimens were prepared using central nervous system tissues of 3rd instar larval stage of scuttle fly, which had completed in situ hybridization, and general histochemical staining (hematoxylin-eosin, H-E) and special histochemical staining (luxol fast blue-cresyl violet) was performed to observe the histological and cytological morphology characteristics of corazonin neurons. As a result, a variety of nerve cell body existed between many myelin sheath. The corazonin neurons compose cortex of central nervous system with other neurons congregating in this tissue and show larger cell body relatively in neurohistochemical analysis.

Description of the Japanese plum sawfly larva Monocellicampa pruni (Hymenoptera: Tenthredinidae) in South Korea (자두수염잎벌 Monocellicampa pruni (벌목: 잎벌과) 유충의 형태적 특징)

  • Nguyen, Hai Nam;Im, Min-Hyeok;Hong, Ki-Jeong
    • Korean journal of applied entomology
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    • v.59 no.4
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    • pp.443-449
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    • 2020
  • This study described and illustrated the morphology of the sawfly's larva Monocellicampa pruni Wei, 1998 for the first time. Our observations confirmed that its larval biology associated with Japanese plum Prunus salicina Lindl included five instars. The larvae of M. pruni are allied to the general morphology of subfamily Nematinae with a cylindrical body, globose head, 4-segmented antenna, thoracic legs with a distinct claw, and 5 dorsal annulets on abdominal segments I - VIII. The absence of anal prolegs after the first molting shows a distinction with the larvae of genus Hoplocampa.

Larval Development of Pavapilumnus trispinosus Sakai, 1965 (Crustacea, Brachvura,Xanthidae) Reared in the Laboratory (세가지부채게(갑각강, 단미목, 부채게과)의 유생발생)

  • 고현숙
    • The Korean Journal of Zoology
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    • v.37 no.3
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    • pp.331-342
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    • 1994
  • The larval development of Parupilumnus trispinosus Sakai, 1965 completed in the laboratory consisted of four zoeal stages and one megalopal stage. Completion of the lanral development required at least 18 days at 20-25"C. The morphology of the lanrae of each stage is described in detail, and comparisons are made with larvae of other 11 species of the subfamily Pilumninae. Although, the zoeae of the subfamily Pilumninae show almost consistent characteristics of the mouthpart appendages, in the characteristics of the carapace spines and the abdominal lateral knobs they can be divided into five groups: (1) the genera Heteropanope and Heteropilumnus, (2) the genera Actumnus and Pilumnus, (3) Pilumnopeus makiona and P sewutifrons, (4) Porupilumnus trispinosus, and (5) Pilumnopeus eucratoides and. p indic${\alpha}$.

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The Life History and Morphological Changes of Daphnia (D. pulex and D. galeata) Induced by the Larval Damselfly (Cercion sp.) and Fish (Micropterus salmoides) Kairomones (실잠자리 유충과 어류에서 분비된 카이로몬에 의한 물벼룩류의 생활사와 형태변화)

  • La, Geung-Hwan;Jo, Hyo-Nyeo;Choe, Hyeon-Ju;Kim, Hyun-Woo
    • Korean Journal of Ecology and Environment
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    • v.42 no.1
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    • pp.107-114
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    • 2009
  • We investigated the predation behavior of larval damselfly on Daphnia pulex and D. galeata, and compared the life history and morphological defenses in two Daphnia species against larval damselfly and fish kairomones. Larval damselflies showed size-dependent predation behavior and preyed upon smaller daphnids easily regardless light condition. Overall, small D. galeata juveniles were more vulnerable than D. pulex to the larval damselfly predation. D. pulex displayed life history and morphological changes as the anti-predator defenses against larval damselfly as well as large mouth bass, while D. galeata showed the anti-predator defenses to the large mouth bass. Thus, our results revealed that two Daphnia species exhibits different anti-predator defense strategy to increase survivorship.

The Larval Age and Mouth Morphology of the Black Soldier Fly, Hermetia illucens (Diptera: Stratiomyidae)

  • Kim, Won-Tae;Bae, Sung-Woo;Park, Hae-Cheol;Park, Kwan-Ho;Lee, Sang-Beom;Choi, Young-Cheol;Han, Sang-Mi;Koh, Young-Ho
    • International Journal of Industrial Entomology and Biomaterials
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    • v.21 no.2
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    • pp.185-187
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    • 2010
  • Most studies of the black soldier fly, Hermitia illucens, widely distributed throughout Southeast Asia and America focused on the use of larvae for recycling various organic materials and feed for fish and livestock. To recognize the instars of the soldier fly's larvae, we examined the number of exuviae originated from each larva from 1st instar to pupa. The weight and the head capsule width of the black soldier fly larvae also confirmed that the black soldier fly was passed through 6th instars. In addition, we found that the black soldier fly larvae had a well developed mandibular-maxillary complex, similar to those reported from the larvae of scavengers including Odontomyia cincta, Neopachygaster maculicornis, Ptecticus brunettii and Stratiomys ruficornis.

Egg and Larval Development of Chelon affinis by Artificial Treatment in Aquarium (등줄숭어, Chelon affinis(Gunther)의 난발생 및 자어의 형태발달)

  • KIM Yong Uk;KIM Jin Koo
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.32 no.2
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    • pp.134-138
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    • 1999
  • Eggs and larval development of Chelon affinis were reared and observed in the laboratory with parent fishes obtained in the Minrak fish market Pusan on March, 1997. The spawned eggs of the species are transparent, round, separated, floated, and their diameters were varied within 0.95$\~$1.06 mm. Hatching began about 73 hours after spawning at $16.0^{\circ}C$. The newly hatched larvae were 1.72$\~$1.92 mm in total length with 19 myomeres, mouth and unopened anus, rod shape melanophores distributed in body. The larvae absorbed yolk material completely in 5 days after hatching and became postlarvae.

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