Energetic composition, reproductive output, and resource allocation of Antarctic asteroids

McClintock, James B.

doi:10.1007/bf00297169

Cited by 20 publications

(13 citation statements)

References 18 publications

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“…(Chia and Walker, 1991). This inverse relationship between pyloric caeca and gonads has been recorded for several polar and temperate species (Farmanfarmaian et al, 1958;Pearse, 1965;Mauzey, 1966;Lawrence, 1973;Jangow and Van Impe, 1977;Dehn, 1980;Franz, 1986;McClintock, 1989). In contrast, available information on the reproduction of tropical Atlantic asteroids is limited (Scheibling, 198 1 ;Emlet et al, 1987), particularly for astropectinid species.…”

Section: Introductionmentioning

confidence: 85%

Reproductive cycle and feeding periodicity in the starfishAstropecten brasiliensisin the Cabo Frio upwelling ecosystem (Brazil)

Ventura

Falcão²,

Santos³

et al. 1997

Invertebrate Reproduction & Development

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Monthly collections ofAstropecten brasiliensis were made at depths of 30 and 45 m. The highest number of prey in the stomach occured in summer in both 1987 and 1988. Specimens larger than 4 cm in radius had mature gonads. The reproductive cycle was determined by gonad indices and histological analysis of gonads. In 1988, the species exhibited an annual reproductive cycle with spawning in December. The pyloric caecum indices showed the highest values between April and July. The relationship between gonad index and pyloric caecum index was inverse. The pyloric caecum peak occurred during the downwelling period (fall and winter) when warm tropical waters (Brazil Current) were inshore. The reproductive peak coincided with the upwelling period (during spring and summer) enabling the larvae to benefit fiom the richer water condition when phytoplankton are more abundant.

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Section: Introductionmentioning

confidence: 85%

Reproductive cycle and feeding periodicity in the starfishAstropecten brasiliensisin the Cabo Frio upwelling ecosystem (Brazil)

Ventura

Falcão²,

Santos³

et al. 1997

Invertebrate Reproduction & Development

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“…Long-term studies of reproduction in Antarctic brachiopods (Meidlinger et al 1998) and brittle stars (Grange et al 2004) also revealed dramatic interannual variation in reproductive output. However, the only 2 studies of reproductive output in Antarctic echinoderms (McClintock 1989, Brockington 2001 both produced values that are comparable with the highest figures for temperate species (Brockington 2001). This suggests that reproductive effort may not be constrained by temperature in the way that it is by food supply.…”

Section: Resultsmentioning

confidence: 83%

Gametogenesis and gonad mass cycles in the common circumpolar Antarctic echinoid Sterechinus neumayeri

Brockington¹,

Peck²,

Tyler³

2007

Mar. Ecol. Prog. Ser.

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Polar conditions (low and stable seawater temperature coupled with highly seasonal primary productivity) constrain reproduction in benthic invertebrates. The reproductive cycle of the common Antarctic sea urchin Sterechinus neumayeri was investigated at monthly intervals over a 2 yr period in relation to seasonality of chlorophyll standing stock and ability to feed. Competence to spawn increased gradually throughout the austral winter to peaks in September to November. Gonad mass varied strongly, both seasonally and among 3 geographically close sites. Spawning occurred between October and January at each site, and was strongest in November of both years. Spawning was not always accompanied by a reduction in gonad mass because of simultaneous feeding and deposition of nutritive tissue for the forthcoming winter. Spawning was annual but there was also strong evidence for longer, multi-year periodicity in reproductive output. Histological analysis indicated an 18 to 24 mo vitellogenic cycle, with oocytes developing from 20 to 50 µm in the first winter, and from 50 to 120 µm in the second winter. Of total oocyte volume increase (vitellogenesis), 93% occurred within the last 12 mo. Spermatogenesis took 12 mo. S. neumayeri does not feed during the austral winter, and vitellogenesis is therefore predominantly decoupled from energy intake. Much of the cost of reproductive synthesis is met at a time of severe energy limitation. KEY WORDS: Gonad mass · Seasonality · Reproductive cycle · Vitellogenesis · UrchinResale or republication not permitted without written consent of the publisher

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“…The pyloric caeca work as a reserve of energy, located inside the arms of the asteroids, and an indicator of the individuals energy reserves is the size and concentration of lipid present on it (Giese, 1966;Lawrence, 1987b). Bosch & Slattery (1999), McClintock & Pearse (1987 and McClintock (1989) reported for a high accumulation of pyloric caeca lipids for the antarctic sea stars Neosmilaster georgianus, Diplasterias brucei and Notasterias armata which may provide easily metabolized energy stores for the incubation period.…”

Section: Discussionmentioning

confidence: 98%

Reproductive biology and energetics of the brooding sea star Anasterias antarctica (Echinodermata: Asteroidea) in the Beagle Channel, Tierra del Fuego, Argentina

Pérez¹,

Fraysse

Boy

et al. 2017

RBT

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The brooding sea star Anasterias antarctica is distributed from the coast of Patagonia to the northern Peninsula of Antarctica. In the Beagle Channel, the females of A. antarctica brood their eggs for seven months and do not feed during this period. The endoparasite Dendrogaster argentinensis (Crustacea: Ascothoracica) causes castration in several species of Anasterias. We randomly collected four samplings of adults in May, August and October (brooding period) and January (non-brooding period). The gonad (GI) and pyloric caeca index (PCI) were calculated as organ wet weight (g) x 100/total wet weight (g). Each individual was sexed by microscopic examination of the gonads. Sex ratio, brooding females/non-brooding females and mature females/non-mature females ratios was 1:1. The male GI reached maximum values in January, when most individuals were sexually mature. The GI of non-brooding females reached its maximum during October when it was significantly higher than those from brooding females. The PCI was minimum in October, being lower in brooding females (August and October). During the non-brooding period, mature females had a significantly higher GI than non-mature females. The PCI did not vary neither between males, nor between mature and non mature females. By the end of the brooding period, non-brooding females showed a higher GI than the brooding females. This is explained by proliferation and increase of the oocytes size of non-brooding females. Mature females showed an incremented GI with presence of mature oocytes, while non-mature females exhibited more abundance of previtelogenic oocytes. Males showed synchronicity in reproductive condition. The females that have not brooded presented a process of active gametogenesis, reaching the summer with a high GI, therefore becoming mature females. Females that had brooded were probably lacking energy for new gonadal maturation. The pyloric caeca would be performing the role of a reserve organ in the brooding females, decreasing its size during the brooding period. Prevalence of D. argentinensis in A. antarctica was 11.06%. As this parasite was recorded in sea stars lacking gonads, these infected hosts could have been castrated. Rev. Biol. Trop. 65(Suppl. 1): S221-S232. Epub 2017 November 01.

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Energetic composition, reproductive output, and resource allocation of Antarctic asteroids

Cited by 20 publications

References 18 publications

Reproductive cycle and feeding periodicity in the starfishAstropecten brasiliensisin the Cabo Frio upwelling ecosystem (Brazil)

Reproductive cycle and feeding periodicity in the starfishAstropecten brasiliensisin the Cabo Frio upwelling ecosystem (Brazil)

Gametogenesis and gonad mass cycles in the common circumpolar Antarctic echinoid Sterechinus neumayeri

Reproductive biology and energetics of the brooding sea star Anasterias antarctica (Echinodermata: Asteroidea) in the Beagle Channel, Tierra del Fuego, Argentina

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