Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
In order to study the characteristics of neoteny in teleosts, development of the thyroid system and digestive tract of a neotenic goby (ice goby, Leucopsarion petersii) and a non-neotenic goby (ukigori, Gymnogobius urotaenia) were compared. In juvenile ukigori, the intestine was found to be convoluted once in the antero-midpart, and gastric glands were present. In the ice goby, the alimentary canal was straight, and no gastric gland was observed even in adult, suggesting that the ice goby retains larval features, not only in appearance but also in internal organs. A marked difference was also found in the thyroid system. In ukigori, activity of the thyroid gland and thyroid stimulating hormone (TSH) cells increased between flexion and postflexion larval phases. However, in the ice goby, thyroid glands remained inactive, and no TSH cells were observed. A delayed development of the thyroid system was suggested as a major factor contributing to neoteny in the ice goby.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.2108/zsj.20.883 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Phenotypic and Genomic Signatures of Latitudinal Local Adaptation Along With Prevailing Ocean Current in a Coastal Goby.
Mol Ecol
January 2025
Faculty of Agriculture, Kyushu University, Fukuoka, Japan.
In the marine realm, unidirectional ocean currents often lead to high migration rates of marine organisms and, therefore, inhibit the formation of their latitudinal genetic structure. In contrast, cryptic latitudinal structures associated with local adaptation may frequently exist in widespread species generally exposed to a strong environmental heterogeneity. However, our understanding of the evolvability of locally adapted populations in open marine environments still needs to be completed.
View Article and Find Full Text PDFA high-resolution genome of an euryhaline and eurythermal rhinogoby (Rhinogobius similis Gill 1895).
G3 (Bethesda)
February 2022
Shanghai Universities Key Laboratory of Marine Animal Taxonomy and Evolution, Shanghai Ocean University, Shanghai 201306, China.
Rhinogobius similis is distributed in East and Southeast Asia. It is an amphidromous species found mostly in freshwater and sometimes brackish waters. We have obtained a high-resolution assembly of the R.
View Article and Find Full Text PDFGenomic and phenotypic consequences of two independent secondary contact zones between allopatric lineages of the anadromous ice goby Leucopsarion petersii.
Heredity (Edinb)
January 2020
Fisheries Laboratory, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Hamamatsu, 431-0214, Shizuoka, Japan.
Genetic and phenotypic analyses of independent secondary contact zones between certain pairs of divergent populations offer powerful opportunities to assess whether the consequences vary with different environmental backgrounds. Populations of the ice goby Leucopsarion petersii are distributed throughout the Japanese archipelago and comprise genetically and phenotypically divergent groups in the Japan Sea and the Pacific Ocean. In particular, populations in the Japan Sea have a larger body size and numbers of vertebrae than those in the Pacific Ocean.
View Article and Find Full Text PDFTemporal patterns in growth and survival of the round goby Neogobius melanostomus.
J Fish Biol
January 2013
Department of Biology, University of Minnesota-Duluth, Duluth, MN 55812, USA.
Monthly, overwinter and annual instantaneous growth rates for round goby Neogobius melanostomus were calculated with maximal growth occurring in July and August and almost no growth observed between ice appearance (October) and melt (March). Annual absolute growth rates averaged 27·3 ± 1·9 mm for males and 19·8 ± 2·4 mm for females. The most parsimonious Cormack-Jolly-Seber model indicated that both the survival and recapture probabilities were dependent on sampling date, but not sex.
View Article and Find Full Text PDFMolecular signatures of lineage-specific adaptive evolution in a unique sea basin: the example of an anadromous goby Leucopsarion petersii.
Mol Ecol
March 2013
Department of Marine Bioscience, Fukui Prefectural University, Obama, Fukui, Japan.
Climate changes on various time scales often shape genetic novelty and adaptive variation in many biotas. We explored molecular signatures of directional selection in populations of the ice goby Leucopsarion petersii inhabiting a unique sea basin, the Sea of Japan, where a wide variety of environments existed in the Pleistocene in relation to shifts in sea level by repeated glaciations. This species consisted of two historically allopatric lineages, the Japan Sea (JS) and Pacific Ocean (PO) lineages, and these have lived under contrasting marine environments that are expected to have imposed different selection regimes caused by past climatic and current oceanographic factors.
View Article and Find Full Text PDF