The reproductive biology of some serolid isopods from the Antarctic

Luxmoore, Richard

doi:10.1007/bf00568750

Cited by 36 publications

(18 citation statements)

References 32 publications

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“…4) remains in the marsupium for some weeks (Wägele 1987) and the apparent absence of marsupial embryo mortality (Luxmoore 1982) is confirmed in this work. Luxmoore (1982) observed the tendency of a steep increase in DM in the premanca stage, which is supported by the present study (Table 2; Fig. 2).…”

Section: Discussionsupporting

confidence: 82%

“…2), showing a significant increase of DM in the premanca stage. Luxmoore (1982) observed a positive correlation in the number of embryos and female C. trilobitoides size during all ontogenetic stages, with the exception of the last the premanca stage. While he argued that the beginning of embryo release in this stage might explain the decrease in embryo number, we hypothesize that cannibalism could be responsible for the significant increase of embryo DM at this stage of development (Fig.…”

Section: Discussionmentioning

confidence: 73%

“…The Antarctic serolid C. trilobitoides belongs to the few better-studied peracarid crustaceans. This species shows several features that indicate a strong energetic bottleneck as a consequence of cold adaptation: C. trilobitoides does only reproduce once in a lifetime (Luxmoore 1982;Wägele 1987). Furthermore, Wägele (1987) estimated that the total embryo developmental in this species lasts about two years in duration in the South Shetland Island area.…”

Section: Discussionmentioning

confidence: 97%

“…They reported a mean DM of 4.65 mg for embryos from Elephant Island, which is in the same order of magnitude than values from this study (4.8 ± 0.3 mg). The only mass data available for more advanced embryo stages are reported by Luxmoore (1982) for individuals sampled at Signy Island. Keeping in mind that there might be a latitudinal cline for these stages as well, the growth pattern described for C. trilobitoides from Signy Island and the Antarctic Peninsula are similar (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Ceratoserolis trilobitoides (Eights 1833) is one of the larger and frequent Antarctic crustaceans and its taxonomy (Held 2000;Leese and Held 2008) and reproductive biology (Wägele 1987;Luxmoore 1982;Clarke and Gore 1992) is among the better-understood ones within the Antarctic Peracarida. Energetic studies in brooding peracarids are scare, but there has been evidence that egg size and biomass in Ceratoserolis trilobitoides increase with lower temperatures and that such patterns express within relatively moderate temperature changes at low temperatures within the Southern Ocean (Wägele 1987;Clarke and Gore 1992).…”

Section: Introductionmentioning

confidence: 99%

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Changes in biomass and elemental composition during early ontogeny of the Antarctic isopod crustacean Ceratoserolis trilobitoides

et al. 2008

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Changes in biomass and elemental composition (dry mass, DM; carbon, C; hydrogen, H; nitrogen, N) were studied throughout the early ontogeny in the serolid isopod Ceratoserolis trilobitoides from a population off the South Shetland Islands (62°24.35 0 S, 61°23.77 0 W). Specimens of C. trilobitoides were sampled using an Agassiz trawl during the expedition ANT XXIII-8 of RV Polarstern in January 2007. Classification of embryos into six developmental stages followed previous studies. No clear sizedependant fecundity relationship was found in ovigerous C. trilobitoides. Egg volume increased by about 160 and 400% from stage I to IV and stage IV to VI, respectively. DM, C, N, and H continuously decreased throughout the early ontogeny from stage I to VI, but DM showed significant increase on reaching the late-V stage and premanca stages. The C:N ratio remained relatively stable throughout stages I to V, followed by a significant drop from about 6.17 to 5.5 in subsequent stages, indicating depletion of lipid resources of maternal origin. The results coincide with previous studies and indicate a shift from a lipid-based metabolism throughout early embryo stages to a proteinbased metabolism in the late-V and premanca stage, which requires external energy supply. Given the steep increase in DM in the final phase of embryo development (late-V stage to premanca) and the need for external food supply to exert growth, the possibility of external food supply or cannibalism in early offspring of C. trilobitoides is discussed.

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Section: Discussionsupporting

confidence: 82%

Section: Discussionmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Changes in biomass and elemental composition during early ontogeny of the Antarctic isopod crustacean Ceratoserolis trilobitoides

et al. 2008

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Possible effects of global environmental changes on Antarctic benthos: a synthesis across five major taxa

Ingels

Vanreusel

Brandt

et al. 2012

Ecology and Evolution

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Because of the unique conditions that exist around the Antarctic continent, Southern Ocean (SO) ecosystems are very susceptible to the growing impact of global climate change and other anthropogenic influences. Consequently, there is an urgent need to understand how SO marine life will cope with expected future changes in the environment. Studies of Antarctic organisms have shown that individual species and higher taxa display different degrees of sensitivity to environmental shifts, making it difficult to predict overall community or ecosystem responses. This emphasizes the need for an improved understanding of the Antarctic benthic ecosystem response to global climate change using a multitaxon approach with consideration of different levels of biological organization. Here, we provide a synthesis of the ability of five important Antarctic benthic taxa (Foraminifera, Nematoda, Amphipoda, Isopoda, and Echinoidea) to cope with changes in the environment (temperature, pH, ice cover, ice scouring, food quantity, and quality) that are linked to climatic changes. Responses from individual to the taxon-specific community level to these drivers will vary with taxon but will include local species extinctions, invasions of warmer-water species, shifts in diversity, dominance, and trophic group composition, all with likely consequences for ecosystem functioning. Limitations in our current knowledge and understanding of climate change effects on the different levels are discussed.

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