Histological and ultrastructural investigation of the female reproductive system of <scp><i>A</i></scp><i>rgulus bengalensis</i><scp>R</scp>amakrishna, 1951 (<scp>C</scp>rustacea: <scp>B</scp>ranchiura)

Banerjee, Anirban; Saha, Samar Kumar

doi:10.1002/jmor.20528

Cited by 4 publications

(1 citation statement)

References 51 publications

(74 reference statements)

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“…The appearance of P. roseola on the egg strips, under both laboratory and field conditions, proves that this rotifer population is a natural inhabitant of the farm water; the same fact was also noted by Fayer et al [7]. At the time of laying, each egg clutch is covered with a secretion from the paired collateral glands [8], which subsequently solidifies into a jelly coat [9]. According to Davis [10], the larvae hatch by creating a furrow through the egg envelopes using their dorsal organs as well as by increasing the osmotic swelling of the inner egg membrane.…”

Section: Discussionsupporting

confidence: 77%

Mutualistic association of rotifer Philodina roseola with the branchiuran fish ectoparasite Argulus bengalensis at its embryonic stage

Banerjee

Poddar

Manna³

et al. 2016

Biol. Lett.

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Several rotifers including Philodina spp. are well known to make commensal and parasitic associations with different animals. The present investigation was carried out to decipher the relationship of Philodina roseola with a piscine ectoparasite Argulus bengalensis in its embryonic stage. Mechanical removal of the symbiont P. roseola from the argulid egg strips resulted in the complete (100%) failure in hatching. Several P. roseola individuals were found to feed on the solidified jelly coat of the eggs enabling the larvae to emerge under both laboratory and field conditions. Under the laboratory condition, the experimental removal of P. roseola did not affect the embryonic development, but it rendered the jelly coat intact; therefore, the larvae were unable to make hatching furrow and subsequently died. The results of our experiments thus prove this service–resource relationship to be a mutualism. Although the association is facultative for P. roseola , it is obligatory for Argulus spp. An act of intervention in this relationship thus offers a promising control of argulosis.

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Section: Discussionsupporting

confidence: 77%

Mutualistic association of rotifer Philodina roseola with the branchiuran fish ectoparasite Argulus bengalensis at its embryonic stage

Banerjee

Poddar

Manna³

et al. 2016

Biol. Lett.

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Branchiura — a compendium of the geographical distribution and a summary of their biology

Neethling

Avenant‐Oldewage

2016

Crustac

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This is a compendium of current knowledge about the crustacean subclass Branchiura Thorell, 1864. An overview of the group is presented, starting from the first species description, and reports of taxonomic changes. It also provides a condensed retrospect of each genus and includes the characteristics of each genus, the geographical distribution of each species arranged according to occurrence per continent; and aspects of the anatomy, physiology, host-parasite interactions and phylogeny are discussed. In order to condense the information available on members of the subclass, additional literature sources on each aspect are tabulated. The species lists provided by the World Register of Marine Species (WoRMS) were used as a starting point as these were the most comprehensive currently available.

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Male and female reproductive systems of the pseudocycnid copepod Cybicola armatus (Bassett-Smith, 1898) (Siphonostomatoida) infecting the commercially important scombrid fish Scomberomorus commerson: a light and electron microscopic study

Helna¹,

Kappalli

2022

Crustac.

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Cybicola armatus (Bassett-Smith, 1898), a host-specific parasitic copepod, massively infects gill filaments of the scombrid fish, Scomberomorus commerson. While the female attaches to the host fish’s gills, the relatively small-sized male prefers to attach to the female genital somite in copulatory position. To our knowledge this is the first report on the structural features of male and female reproductive organs of C. armatus, a pseudocycnid parasite, using morphological, histological, histochemical and ultrastructural parameters. In males, the sac-like testis is followed by a highly coiled vas deferens ending with a bulbous spermatophore sac in which the round-shaped spermatozoa are abundantly seen. Histologically, germ cells in the testis are at different maturation stages and region-specific. In females, the ovaries are comprised of germarium, previtellogenic oocytes and follicle cells. However, interestingly, mature vitellogenic oocytes enveloped by follicular cells are seen only in the oviducts, which are ensheathed by longitudinal and circular muscle bands. The spermathecae of the post-copulatory females contain filiform spermatozoa, while in pre-copulatory specimens, the spermathecae appear as thin, flabby structures. The post-copulatory female carries spermatophore sacs at her genital orfice. The developing eggs in the egg sacs did not display synchrony with respect to stages of embryogenesis, as borne out from histological studies. The currently reported study also demonstrates, for the first time, the copulatory events of C. armatus that help us understand the mode of sperm transfer in this fish parasite. The total of information derived from the currently reported study is pertinent not only from the perspective of understanding the reproductive mechanism and adaptive strategies of a potential, but rather unexplored pseudocycnid copepod. Rather, it throws light as well on the necessity and, until now, inadequacy of investigations on parasitic crustaceans that inflict heavy damage to fisheries and contaminate the aquatic ecosystem.

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Histological and ultrastructural investigation of the female reproductive system of Argulus bengalensisRamakrishna, 1951 (Crustacea: Branchiura)

Cited by 4 publications

References 51 publications

Mutualistic association of rotifer Philodina roseola with the branchiuran fish ectoparasite Argulus bengalensis at its embryonic stage

Mutualistic association of rotifer Philodina roseola with the branchiuran fish ectoparasite Argulus bengalensis at its embryonic stage

Branchiura — a compendium of the geographical distribution and a summary of their biology

Male and female reproductive systems of the pseudocycnid copepod Cybicola armatus (Bassett-Smith, 1898) (Siphonostomatoida) infecting the commercially important scombrid fish Scomberomorus commerson: a light and electron microscopic study

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