Gonad and androgenic gland development in relation to sexual morphology in Pandalopsis japonica Balss, 1914 (Decapoda, Pandalidae)

Kim, Jung Nyun; Kim, Dae Hyun; Han, Chang Hee; Oh, Taeg Yun; Kee, Hyung; Kim, Dong–Sun; Choi, Jung Hwa

doi:10.1163/156854006777584269

Cited by 15 publications

(4 citation statements)

References 25 publications

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“…Chiba et al 2000, Onishi et al 2001. Kim et al (2006) confirmed protandrous sex change of Pandalopsis japonica by histological observation. Protandrous hermaphroditism is also suggested for P. coccinata, P. glabra and P. pacifica, although they are not listed in Table 1 (T. Komai, personal communication).…”

Section: Hermaphroditsm In Decapod Crustaceansmentioning

confidence: 55%

A review of ecological and evolutionary studies on hermaphroditic decapod crustaceans

Chiba

2007

Plankton Benthos Res

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Sequential hermaphroditism (sex change) has been reported in many decapod crustaceans, but it has not been fully reviewed to date. In this review, I have integrated and sorted descriptions regarding hermaphroditic decapod crustaceans. Eighty-five species have been recognized as hermaphrodites and 57 of those species are protandrous (male first) hermaphrodites including protandrous sex changer and protandrous-simultaneous hermaphrodite. The sexual maturation pattern of the remaining 28 species is still unclear, although simultaneous hermaphroditism has generally been speculated from sexual characteristics in their morphology or reproductive organs. Moreover, I have summarized the emerging knowledge of the adaptive significance of their sex change. After briefly reviewing theoretical works, I draw attention to recent empirical works exploring the proximal factors causing life history variation. I discuss life history variation within a population and among populations is caused by growth rate variation, mating system and diet.

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Section: Hermaphroditsm In Decapod Crustaceansmentioning

confidence: 55%

A review of ecological and evolutionary studies on hermaphroditic decapod crustaceans

Chiba

2007

Plankton Benthos Res

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“…Individual maturation was determined using the GSI, as described in Kim et al (2006). The expression of both Pj-Vg1 and Pj-Vg2 transcripts was at a basal level in the hepatopancreas and ovary of immature individuals (GSI 0.2-1.3).…”

Section: Expression Analysismentioning

confidence: 99%

Structural Similarity and Expression Differences of Two Pj-Vg Genes from the Pandalus Shrimp Pandalopsis japonica

Jeon¹,

Kim²,

Kim³

et al. 2011

Fisheries and aquatic sciences

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Vitellogenin (Vg) is the precursor of vitellin (Vn), which is the major yolk protein in nearly all oviparous species, including fish, amphibians, reptiles, and most invertebrates. It is one of the most important factors during reproduction, and numerous studies have shown that Vg genes are markers of the reproductive cycle and effecter genes induced by endocrine-disrupting chemicals (EDCs). Previously, we isolated two distinct cDNAs encoding vitellogenin homologs Pj-Vg1 and Pj-Vg2 from Pandalus shrimp Pandalopsis japonica. In this study, full-length genomic sequences of Pj-Vg1 and Pj-Vg2 were determined using a PCR-based genome walking strategy. Isolated Pj-Vg1 and Pj-Vg2 genes were 11,910 and 11,850 bp long, respectively. Both Pj-Vg genes had 15 exons and 14 introns, and the splicing sites were also the same, suggesting that they arose via gene duplication. The similar structural characteristics of decapod Vg genes suggest that they are all orthologs that evolved from the same ancestral gene. Analysis of Pj-Vg1 and Pj-Vg2 expression revealed that the relative copy numbers of Pj-Vg1 and Pj-Vg2 were similar in the hepatopancreas, whereas Pj-Vg2 transcripts were also detected in the ovary. Expression of both Pj-Vg genes was induced in hepatopancreas of mature individuals, whereas only Pj-Vg2 transcripts were upregulated in the ovaries from mature animals, suggesting that both Pj-Vgs are important for oocyte development. A strong positive correlation was found between Pj-Vg1 and Pj-Vg2 transcripts in the same individual, indicating they are under the same control mechanisms. Additionally, a positive correlation was found between ovarian and hepatopancreatic Pj-Vg2 transcripts, suggesting that its dual expression is regulated by similar physiological conditions. Knowledge of the similarities and differences between the two vitellogenin-like genes, Pj-Vg1 and Pj-Vg2, would help us to understand their roles in reproduction and other physiological effects.

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“…To date, research about the shrimp has focused on the development of the larva (Komai & Mizushima, 1993;Komai, 1999), the energy budget of the larva (Kim et al, 2013), sperm structure (Kim et al, 2003(Kim et al, , 2006 and genetic studies Salma et al, 2012). For the active management and maintenance fisheries, juvenile shrimp must be grown and released.…”

Section: Introductionmentioning

confidence: 99%

Effects of stocking density and shelter type on the growth and survival of pandalid shrimp (Pandalopsis japonica Balss, 1914) juveniles

Park

Kwon

2015

Crustac

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In this study, we determined the optimal shelter type by comparisons of growth, survival and RNA/DNA ratio of Pandalopsis japonica juveniles after rearing for 1 month and examining the effects of some shelters. The shelters used were brush-type, coloured pompons, and vinyl blankets. Attachment of individuals was highest, 117.7 ± 9.29 shrimp/900 cm 2 , with brush-type shelters. In rearing experiments for 1 month with four shelters and two stocking densities, carapace length (4.44-4.48 mm), wet weight (119.1-126.9 mg/ind.) and RNA/DNA ratio (0.11-0.12) were not significantly different between the treatments. Survival was highest with the brush-type shelter, but values were not significantly related to stocking density. In conclusion, the shelter type most enhancing attachment to the substrate and survival was a brush-type shelter. Regarding stocking density, survival was higher with a lower stocking density (60 juveniles/900 cm 2 ). Thus, the quantities of reared shrimp can be enhanced by introducing shelters in aquaculture tanks. RÉSUMÉDans cette étude nous avons déterminé le type optimal d'abri en comparant la croissance, la survie et le ratio RNA/DNA de juvéniles de Pandalopsis japonica élevés pendant un mois dans différent types d'abris. Les abris utilisés étaient de type brosse, ponpons colorés, et couvertures en vinyle. L'attachement des individus a été le plus élevé avec l'abri de type brosse, 117,7 ± 9,29 crevettes/900 cm 2 . Dans les expériences d'élevage pendant un mois avec quatre types d'abris et deux densités d'individus, la longueur de la carapace (4,44-4,48 mm), le poids frais (119,1-126,9 mg/ind.) et le ratio RNA/DNA (0,11-0,12), n'ont pas été significativement différents entre les traitements. La survie a été la plus élevée avec l'abri de type brosse, mais les valeurs n'étaient pas significativement STOCKING DENSITY AND SHELTERS IN PANDALID SHRIMP JUVENILES 145 reliées à la densité d'élevage. En conclusion, l'abri qui favorise le plus l'attachement au substrat et la survie a été l'abri de type brosse. En ce qui concerne la densité d'élevage, la survie a été la plus haute avec la plus faible densité d'élevage (60 juveniles/900 cm 2 ). Ainsi, les quantités de crevettes élevées peuvent être augmentées en introduisant des abris dans les bassins d'aquaculture.

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Gonad and androgenic gland development in relation to sexual morphology in Pandalopsis japonica Balss, 1914 (Decapoda, Pandalidae)

Cited by 15 publications

References 25 publications

A review of ecological and evolutionary studies on hermaphroditic decapod crustaceans

A review of ecological and evolutionary studies on hermaphroditic decapod crustaceans

Structural Similarity and Expression Differences of Two Pj-Vg Genes from the Pandalus Shrimp Pandalopsis japonica

Effects of stocking density and shelter type on the growth and survival of pandalid shrimp (Pandalopsis japonica Balss, 1914) juveniles

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