Seasonal variation in reproductive parameters of the squat lobster Pleuroncodes monodon from a South Pacific population

Guzmán, Fabián; Olavarría, Luis; Urzúa, Ángel

doi:10.1080/07924259.2016.1174155

Cited by 14 publications

(18 citation statements)

References 51 publications

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“…maxillipeds). Especially for newly hatched larvae characterized by a large size with strong musculature (indicating high levels of proteins), developed feeding structures would allow these larvae to be planktonic predators permitting rapid growth when food availability and high temperatures are favorable during spring and summer (Yannicelli, Castro, Schneider, & Sobarzo, ; Seguel, ; Guzmán et al., ).…”

Section: Discussionmentioning

confidence: 99%

“…Pleuroncodes monodon along the Southeastern Pacific has an extended reproductive period, with ovigerous females present from February to December (Gutiérrez & Zúñiga, ; Palma & Arana, ). During this extended period, P. monodon produces fewer but larger “winter eggs” and a higher number of smaller “summer eggs” (Espinoza et al., ; Guzmán et al., ). In this context, the female energy investment in egg production (in absolute values, calculated as number of eggs multiplied by the energy content per egg) did not show significant differences between winter and summer.…”

Section: Discussionmentioning

confidence: 99%

“…It is also characterized with the production of multiple broods (i.e. eggs laid) during an annual cycle (three to four different broods) (Guzmán, Olavarría, & Urzúa, ; Thiel, Espinoza‐Fuenzalida, Acuña, & Rivadeneira, ). During this prolonged period, the reproductive females (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…A recent study indicated that the fecundity and egg size of the red squat lobster varies seasonally; eggs are numerous and small in summer versus large and few in winter (Guzmán et al., ). This pattern is also known as the phenomenon of “winter” eggs versus “summer” eggs, and has already been described in other decapods from temperate regions (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal changes in the biochemical composition of females and offspring of red squat lobster, Pleuroncodes monodon (Decapoda, Munididae), from the Southeastern Pacific

et al. 2017

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Pleuroncodes monodon is an important fishery resource and key species from the Southeastern Pacific. During its prolonged reproductive period (from February to December), ovigerous females are exposed to seasonal variation in environmental factors (e.g. temperature and food availability), with higher levels of these environmental parameters during summer and lower in winter, and must adjust their biochemistry to ensure their own survival and that of their embryos. The aim of this study was to analyse seasonal changes in the biochemical composition of ovigerous females and their eggs. The data show that the content of lipids, proteins and organic matter in the hepatopancreases of females was significantly higher in winter than in summer.Similarly, the lipid content of the eggs was significantly higher in winter than in summer, yet the protein content of the eggs had the opposite pattern with greater values found in summer. Consistent with the 'reproductive energetic model', the initial and final energy produced by the hepatopancreas showed significant seasonal variations, whereas female investment in egg production (in absolute values) did not show significant seasonal differences. The seasonal differences observed in the biochemistry, organic matter and energy content of the female hepatopancreases may be related to the storage of energy for growth and reproduction. Furthermore, the seasonal variation in the content of lipids, proteins and energy in eggs is likely related to embryogenesis and larval hatching in function with environmental conditions. Seasonal variation in the biochemical composition of P. monodon has direct effects on the marine food web and also upon fisheries.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Seasonal changes in the biochemical composition of females and offspring of red squat lobster, Pleuroncodes monodon (Decapoda, Munididae), from the Southeastern Pacific

et al. 2017

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“…is common (Medellin-Mora et al ., 2016). Because of this, decapod crustaceans in temperate regions must adopt strategies that allow them to invest energy in reproduction to ensure successful survival of their broods (Urzúa et al ., 2012; Guzmán et al ., 2016). Consequently, decapod crustacean mothers provide recently laid embryos with all of the energy reserves necessary for successful development (Wenner & Kuris, 1990).…”

Section: Introductionmentioning

confidence: 99%

Temporal variation in the fatty acid composition of ovigerous females and embryos of the squat lobsterPleuroncodes monodon(Decapoda, Munididae)

et al. 2017

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Pleuroncodes monodon, an important fishery resource and key species in the Humboldt Current Large Marine ecosystem, has a prolonged reproductive period from winter until end of summer, and during this time females incubating their embryos are exposed to seasonal variation in food availability and in temperature. Additionally, in order to ensure successful reproduction and survival of embryos, changes occur in the main internal reserves and/or sources of energy of P. monodon. The aim of this study was to determine the extent of seasonal variation (winter vs summer) in the lipid content and fatty acid composition of ovigerous females and their embryos. The results show that a higher percentage of saturated and polyunsaturated fatty acids are found in females in winter. Similarly, the composition of fatty acids in embryos found here indicates that winter embryos have more saturated fatty acids and essential fatty acids (C18:2n6cis, C18:3n6 and C22:6n3) than do summer embryos. According to PCA analysis of fatty acid profile, samples from summer may be distinguished into two isolated groups with conspicuous variations in fatty acids profile of embryo and hepatopancreas. While in winter, the opposite pattern occurs in the fatty acid profile of embryo and hepatopancreas. These variations may be related to relevant physiological processes (reproduction and growth) and of their ontogeny (development and survival of offspring). Seasonal variation in the lipid content and composition of fatty acids of P. monodon could directly impact this species’ reproduction and survival and subsequently could have consequences on the food web and fishery exploitation.

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Reproductive patterns in demersal crustaceans from the upper boundary of the OMZ off north-central Chile

Gallardo

López

Ramos

et al. 2017

Continental Shelf Research

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Seasonal variation in reproductive parameters of the squat lobster Pleuroncodes monodon from a South Pacific population

Cited by 14 publications

References 51 publications

Seasonal changes in the biochemical composition of females and offspring of red squat lobster, Pleuroncodes monodon (Decapoda, Munididae), from the Southeastern Pacific

Seasonal changes in the biochemical composition of females and offspring of red squat lobster, Pleuroncodes monodon (Decapoda, Munididae), from the Southeastern Pacific

Temporal variation in the fatty acid composition of ovigerous females and embryos of the squat lobsterPleuroncodes monodon(Decapoda, Munididae)

Reproductive patterns in demersal crustaceans from the upper boundary of the OMZ off north-central Chile

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