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Ultrastructural variations of the sagittae in two Anabantiformes fishes: Anabas testudineus (Bloch, 1792) and Trichogaster fasciata (Bloch & Schneider, 1801)

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Title Ultrastructural variations of the sagittae in two Anabantiformes fishes: Anabas testudineus (Bloch, 1792) and Trichogaster fasciata (Bloch & Schneider, 1801)
 
Creator Roy, Soumen
Roy, Urmila Giri
Ghorai, Narayan
Saha, Samir Kumar
Singh, Prabhakar
Mukhopadhyay, Amit
Tripathy, Basudev
 
Subject Anabantiformes
Climbing-Perch
Labyrinth-Perch
Sagitta otolith
Ultrastructure
 
Description 601-610
The sagitta otolith is well-decorated with various species-specific peculiarities, used to support the relatedness in
taxonomy and other aspects among fishes. Present study deals with the morphostructural variations of the sagitta in the
Anabas testudineus and Trichogaster fasciata by light and scanning electron microscopy. As these two fishes are belonging
to order Anabantiformes but their sagitta morphologies are much more varies. The sagitta of the A. testudineus is oval with
complete dorsal and ventral marginal boundary, while the dorsal boundary is incomplete in the T. fasciata. The sulcus of the
A. testudineus is ostio-pseudocaudal with spoon-headed ostium, whereas the sulcus in T. fasciata is ostio-caudal with a
simply tubular ostium. The ostium and cauda are demarcated with a prominent constriction in the A. testudineus, while this
demarcation is maintained by a virgule-like development in the T.fasciata. Presence of the orthorostrum patch, and
hexangular stony pillars along the marginal sculpture in the T. fasciata is a species-specific peculiarity. A phylogenetic tree
is made based on the sagitta features between these two fish species and five other Anabantiformes fishes and stated that the
A. testudineus is characteristically more related to Channa sp than that of the T. fasciata.
 
Date 2023-08-14T09:34:01Z
2023-08-14T09:34:01Z
2023-08
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscpr.res.in/handle/123456789/62419
https://doi.org/10.56042/ijbb.v60i8.4301
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJBB Vol.60(08) [August 2023]