Population structure of daytime surface swarms of Nyctiphanes simplex (Crustacea: Euphausiacea) in the Gulf of California, Mexico

D. Gendron

doi:10.3354/meps087001

Population structure of daytime surface swarms of Nyctiphanes simplex (Crustacea: Euphausiacea) in the Gulf of California, Mexico

D. Gendron

Research output: Contribution to journal › Article › peer-review

55 Scopus citations

Abstract

During February, March and April, 57% of the euphausiids were in breeeding condition; males possessed developed spermatophores while females were carrying eggs and metanauplii. Sex ratios of female:male were between 1:1 and 2:1. Swarm samples contained high numbers of eggs and metanauplii. Swarming is related to reproductive activity, but analysis of one swarm sample of N. simplex showed that only 8% were in breeding condition. Highest biomass found was 32.6 g wet wt m^-3, correlated with the high trophic activity observed in the sample area. -from Author

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Marine Ecology Progress Series
Volume	87
Issue number	1-2
DOIs	https://doi.org/10.3354/meps087001
State	Published - 1992
Externally published	Yes

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title = "Population structure of daytime surface swarms of Nyctiphanes simplex (Crustacea: Euphausiacea) in the Gulf of California, Mexico",

abstract = "During February, March and April, 57% of the euphausiids were in breeeding condition; males possessed developed spermatophores while females were carrying eggs and metanauplii. Sex ratios of female:male were between 1:1 and 2:1. Swarm samples contained high numbers of eggs and metanauplii. Swarming is related to reproductive activity, but analysis of one swarm sample of N. simplex showed that only 8% were in breeding condition. Highest biomass found was 32.6 g wet wt m-3, correlated with the high trophic activity observed in the sample area. -from Author",

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AU - Gendron, D.

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AB - During February, March and April, 57% of the euphausiids were in breeeding condition; males possessed developed spermatophores while females were carrying eggs and metanauplii. Sex ratios of female:male were between 1:1 and 2:1. Swarm samples contained high numbers of eggs and metanauplii. Swarming is related to reproductive activity, but analysis of one swarm sample of N. simplex showed that only 8% were in breeding condition. Highest biomass found was 32.6 g wet wt m-3, correlated with the high trophic activity observed in the sample area. -from Author

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DO - 10.3354/meps087001

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JF - Marine Ecology Progress Series

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ER -

Population structure of daytime surface swarms of Nyctiphanes simplex (Crustacea: Euphausiacea) in the Gulf of California, Mexico

Abstract

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