Reproductive cycle of &lt;i&gt;Loxechinus albus&lt;/i&gt; (Echinodermata: Echinoidea) in two areas of the Magellan Region (53ºS, 70-72ºW), Chile

Oyarzún, Silvia; Marín, Sandra L.; Valladares, Carlos; Iriarte, José Luis

doi:10.3989/scimar.1999.63s1439

Cited by 27 publications

(6 citation statements)

References 12 publications

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“…At this stage, gonads of both sexes are well developed and contain mature gametes, indicating a feasible second maturation period (remature) in spite of the lack of a GI relative maximum (Cossi et al, 2015). Multiplicity and intensity of maturation peaks in echinoids are associated with food quality and availability (Oyarzún, Marín, Valladares & Iriarte, 1999), minor environmental variations in the sampling areas and inter annual variations in the environmental factors involved in the regulation of reproduction (Pearse & Cameron, 1991). Rematuring gonads had a greater number of smaller oocytes than mature gonads.…”

Section: Discussionmentioning

confidence: 99%

Pattern of energy allocation during the gametogenesis of the asteroid Cosmasterias lurida (Forcipulatida: Stichasteridae) from the Beagle Channel, Ushuaia, Argentina

Cossi

Boy

Pérez

2017

RBT

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Energy allocation patterns during the reproductive cycle of echinoderms may be determined by the different energy requirements of the organisms. In this study, we describe the energy reserves variation in the gonads, pyloric caeca and stomach among the gametogenic stages of a population of Cosmasterias lurida from the Beagle Channel, Argentina. Adult individuals of C. lurida were collected from the subtidal zone of Ushuaia Bay during four seasonal sampling periods (August 2010 to June 2011). Indices, energy density (kJ/g ash-free dry mass) and energy content (kJ) of gonads, pyloric caeca and stomach were determined. Oocytes number and diameter were evaluated. Cosmasterias lurida had a major peak of gonadal index (GI) in mature gonads (M), with a great decrease towards the spawning (PS/PSR) and remature (RM) periods. No variation was observed in the energy density of the gonads (EDG). The energy content of the gonads (ECG) presented a similar pattern to the GI. Thus, the gonadal storage cycle can be explained through the variation in gonad mass more than in its energy density. Females had higher ECG and EDG values than males, which suggest a greater energy contribution in females during the reproductive cycle. The stomach and the pyloric caeca indices, energy density and energy content remained unaltered among the stages. The energy density of pyloric caeca (EDPC) was higher in mature males than in mature females. Likewise, the energy density of the stomach (EDS) was overall higher in males than in females. This inverse pattern between sexes in relation to the EDG may suggest a transference of energy from the pyloric caeca and stomach to gonads during maturate stage playing a storage role for reproduction. Rev. Biol. Trop. 65(Suppl. 1): S197-S206. Epub 2017 November 01.

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Section: Discussionmentioning

confidence: 99%

Pattern of energy allocation during the gametogenesis of the asteroid Cosmasterias lurida (Forcipulatida: Stichasteridae) from the Beagle Channel, Ushuaia, Argentina

Cossi

Boy

Pérez

2017

RBT

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“…Thereby, each MI value indicates its respective gonad development stage throughout the collecting period. It has been applied in several echinoderms (Sewell, 1992; Oyarzún et al ., 1999; Despalatović et al ., 2004; Kazanidis et al ., 2014). The MI was calculated as MI = ∑ (ni × si)/N], where ni = the number of sea urchins at each microscopic gonadosomatic index stage (i.e.…”

Section: Methodsmentioning

confidence: 99%

Reproductive patterns of the black starry sea urchin Arbacia stellata in Punta Banda, Baja California, Mexico

Díaz-Martínez¹,

Carpizo-Ituarte²,

Benítez‐Villalobos

2019

J. Mar. Biol. Ass.

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Widely distributed species such as Arbacia stellata adjust patterns of their life history according to local conditions. In the present study the reproductive cycle of this species was analysed throughout a sampling year. Gonadal development cycle, sex ratio, actual fecundity and oocyte size distribution were characterized and the relationship of these reproductive characteristics with environmental variables such as sea surface temperature, photoperiod, chlorophyll a and net primary production evaluated. Our results showed that A. stellata is a gonochoric sea urchin. Gametogenesis was classified into six stages for both sexes (immature, growth, pre-maturity I, pre-maturity II, mature and spawning) and no synchrony was observed for the gonads between individuals. The female to male ratio was close to 1:1 in most months. The gonadosomatic index (GSI) showed significant differences between sexes or months; however, the highest values were observed during spring, with positive correlation with chlorophyll a. No significant differences were observed in the maturity index (MI) between sexes, with a positive correlation with temperature but negative with chlorophyll. Actual fecundity showed wide variations throughout the year and correlation with chlorophyll a and temperature. Oocyte size distribution was unimodal and the predominant frequency was that of mature oocytes. The reproductive cycle of A. stellata has a semi-continuous pattern for both sexes and partial spawning throughout the year in the sampling site. We observed nutrient assimilation in the gonads during spring and a larger reproductive activity from late summer to early winter.

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“…Seawater temperature has long been cited to explain seasonal reproductive patterns in temperate urchins (Elmhirst 1923, Stott 1931, Bennett & Giese 1955, Fuji 1960b, Stephens 1972, Byrne 1990, Oyarz un et al 1999, Brady & Scheibling 2006, but see Gonor 1973a, Himmelman 1978. Spawning in some tropical and subtropical urchins has been shown to vary with seawater temperature as well.…”

Section: Causes Of Variabilitymentioning

confidence: 99%

Spatial and Temporal Variability of Spawning in the Green Sea UrchinStrongylocentrotus droebachiensisalong the Coast of Maine

Vadas

Beal

Dudgeon

et al. 2015

Journal of Shellfish Research

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Reproductive cycle of <i>Loxechinus albus</i> (Echinodermata: Echinoidea) in two areas of the Magellan Region (53ºS, 70-72ºW), Chile

Cited by 27 publications

References 12 publications

Pattern of energy allocation during the gametogenesis of the asteroid Cosmasterias lurida (Forcipulatida: Stichasteridae) from the Beagle Channel, Ushuaia, Argentina

Pattern of energy allocation during the gametogenesis of the asteroid Cosmasterias lurida (Forcipulatida: Stichasteridae) from the Beagle Channel, Ushuaia, Argentina

Reproductive patterns of the black starry sea urchin Arbacia stellata in Punta Banda, Baja California, Mexico

Spatial and Temporal Variability of Spawning in the Green Sea UrchinStrongylocentrotus droebachiensisalong the Coast of Maine

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