Reproductive features in the sea cucumber Pentactella perrieri (Ekman, 1927) (Holothuroidea: Cucumariidae): a brooding h
- PDF / 1,146,338 Bytes
- 7 Pages / 595.276 x 790.866 pts Page_size
- 41 Downloads / 138 Views
ORIGINAL PAPER
Reproductive features in the sea cucumber Pentactella perrieri (Ekman, 1927) (Holothuroidea: Cucumariidae): a brooding hermaphrodite species from the southwestern Atlantic Ocean Mariano I. Martinez1 · Ezequiel J. Alba‑Posse1 · Daniel Lauretta1 · Pablo E. Penchaszadeh1 Received: 23 April 2019 / Revised: 14 June 2020 / Accepted: 25 June 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Cucumariidae (Echinodermata: Holothuroidea) is a family of sea cucumbers known for displaying different reproductive strategies, including brooding and hermaphroditism. These reproductive strategies of marine invertebrates are a key feature, since it is strongly related to evolutionary and ecological aspects. According to the place in which offsprings are grown, brooding can be classified in six groups, underneath the ventral sole, among tentacles, brood pouches, dorsal pockets, perivisceral coelom and in the ovary. The last two groups are restricted to a few studied cucumariids, with only one previous report for the southwestern Atlantic Ocean. Specimens of Pentactella perrieri along its known distribution (including Burdwood Bank/MPA Namuncurá and Subantarctic area) were analyzed, using morphological observations of the internal and external features. We found for the first time, that P. perrieri is a hermaphroditic species identified as a brooder. We found between 7 up to 11 brooded individuals, of up to 3 mm length, inside of 2 thin spherical and transparent brood-sacs, with a ventral external opening. Oocytes up to 1600 µm were found in May, being the largest known for the family. It was also the month with the largest mean oocytes size (778.38 ± 611.40 µm, N = 2). This research contributes to the study of the many different reproductive strategies that marine invertebrates can adopt. Keywords Argentina · Burdwood Bank/MPA Namuncurá · Reproduction · Lecithotrophy · Brood-sacs · Dendrochirotida
Introduction Cucumariidae is a family of sea cucumbers (Echinodermata: Holothuroidea) known for displaying brooding (Alcock and O’Loughlin 2001; O’Loughlin et al. 2009; Bohn and Heß 2014; Martinez et al. 2018). Depending on where offsprings are located, brooding can be classified in six groups, underneath the ventral sole, among tentacles, brood pouches, * Mariano I. Martinez [email protected] Ezequiel J. Alba‑Posse [email protected] Daniel Lauretta [email protected] Pablo E. Penchaszadeh [email protected] 1
Laboratorio de Ecosistemas Costeros, Plataforma y Mar Profundo‑Malacología, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia” (CONICET), Av. Ángel Gallardo 470, C1405DJR Buenos Aires, Argentina
dorsal pockets, perivisceral coelom and in the ovary (Smiley et al. 1991). For the first four groups there are several examples, including the hole genus Echinopsolus (see Bohn and Heß 2014). The females of this genus brood in five anterior interradial brood pouches, which is something that share with the species Cucumaria joubini, that also brood in five anterior brood pouches. I
Data Loading...
