Oral brooding (Anasterias antarctica) versus internal brooding (Diplopteraster verrucosus): Contrasting strategies of the brooded juveniles for full development
Fraysse, C.P.; Pérez, A.F.; Mattenet, A.; Pfoh, M.; Boy, C.C. (2025). Oral brooding (Anasterias antarctica) versus internal brooding (Diplopteraster verrucosus): Contrasting strategies of the brooded juveniles for full development. Rev. Mus. Argentino Cienc. Nat., n.s. 27(1): 109-117
In: Revista del Museo Argentino de Ciencias Naturales, Nueva Serie. Museo Argentino de Ciencias Naturales Bernardino Rivadavia e Instituto Nacional de Investigacion de las Ciencias Naturales: Buenos Aires. ISSN 1514-5158; e-ISSN 1853-0400, more
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| Authors | | Top |
- Fraysse, C.P.
- Pérez, A.F.
- Mattenet, A.
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| Abstract |
Both sea starspecies in this study are brooders from the South Atlantic.Anasteriasantarcticadisplays a complex reproductive cycle involving incubation duringeight or nine months and it broods its offspring over the mouth,while Diplopterasterverrucosusdisplays continuous reproduction and broods its offspring incnidamental chambers under the dermis. We collected A.antarctica inMay, August, and November (beginning, mid and final stages ofoffspring development) from Parque Nacional Tierra del Fuego (Tierradel Fuego AeIAS, Argentina), while D.verrucosuswas collected at three Oceanographic Research Cruises at NamuncuráMarine Protected Area/ Burdwood Bank I and II. We measured generalparameters of oxidative metabolism (reactive oxygen species “ROS”and total antioxidant capacity “TAC”), energy density, and energycontent in three different stages during offspring development. Inthe case of A.antarctica,energy depletion, and oxidative imbalance (increasing ROS withconstant TAC) at the final development stage could act as adevelopmental constraint and trigger the independence of juveniles.Similarly,in D.verrucosusjuveniles, which exhibit extra embryonic maternal nutrition, despitethe continued increase in energy, the antioxidants present in thiskind of nutrition do not counteract the ROS generated by themetabolic rise. |
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