Effect of abiotic variables on fish eggs and larvae distribution in headwaters of Cuiabá River, Mato Grosso State, Brazil

Researches on ichthyoplankton seems to be an important tool to identification of spawning areas and periods for freshwater fish. Ichthyoplankton was sampled monthly in the headwaters of the Cuiabá River, upper Paraguay River basin, (Mato Grosso State, Brazil), and in four of its tributaries, between November 2007 and March 2008, to evaluate the spatial and temporal distribution of fish eggs and larvae and the influence of regional and local variables on their distribution. In total, 22,067 eggs and 1,045 larvae were collected. A significant negative correlation was found between egg density and the variables of river level and flow volume. Larval density was not significantly correlated with any of the regional variables. The egg and larval densities were significantly higher at the sampling sites in the main river. The highest densities were found in environments with greater river widths, intermediate depths and lowest values of dissolved oxygen, electrical conductivity, and transparency. Anostomidae, Zungaro zungaro, Bryconamericus spp., Pimelodus spp., Pimelodidae, Auchenipteridae, and Siluriformes were the most abundant groups of larvae, and were observed at the sampling sites in the main river. The study site is an important spawning area for migratory and, non-migratory fish species, and highlight the importance of the main river to the reproductive event, by the influence of local variables transparency and river width, which in turn maybe temporally influenced by the river level.

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Spatial and temporal distribution of ichthyoplankton in the upper Uruguay river, Brazil

Brazilian Archives of Biology and Technology ◽

10.1590/s1516-89132009000400017 ◽

2009 ◽

Vol 52 (4) ◽

pp. 933-944 ◽

Cited By ~ 26

Author(s):

Samara Hermes-Silva ◽

David Reynalte-Tataje ◽

Evoy Zaniboni-Filho

Keyword(s):

Temporal Distribution ◽

Spatial And Temporal Distribution ◽

Fish Eggs ◽

Spawning Grounds ◽

Main River ◽

Eggs And Larvae ◽

Uruguay River ◽

Fish Eggs And Larvae

The distribution and abundance of fish eggs and larvae was analyzed in three sections of the Upper Uruguay river, in a stretch of 290 km. Samples were collected monthly from October, 2001 to March, 2002 during 48-h cycles at 6-h intervals between each sampling. Surface and bottom samples were collected with a 0.5-mm mesh cylindroconical net. Fishes from the Upper Uruguay river were reproductively active mainly from October to January, and this activity was more intense at the Ligeiro and Chapecó tributaries and Chapecó main river. It was observed that the tributaries are important spawning grounds and larval nursery sites, indicating the importance of preserving such environments.

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Spatial and temporal distribution of fish eggs and larvae in a subtropical coastal lagoon, Santa Catarina State, Brazil

Neotropical Ichthyology ◽

10.1590/s1679-62252009000200015 ◽

2009 ◽

Vol 7 (2) ◽

pp. 231-240 ◽

Cited By ~ 7

Author(s):

Luis C. P. Macedo-Soares ◽

Alesandra B. Birolo ◽

Andrea S. Freire

Keyword(s):

Coastal Lagoon ◽

Temporal Distribution ◽

Abundance Distribution ◽

Fish Eggs ◽

Coastal Fish ◽

The Family ◽

The Mean ◽

Eggs And Larvae ◽

Distribution Of Fish ◽

Fish Eggs And Larvae

This study investigated the variation in abundance, distribution and composition of ichthyoplankton in a lagoon in southern Brazil through the year and at different stations within the lagoon. Ibiraquera Lagoon is a shallow coastal lagoon connected to the sea by a semi-permanent sandbar. Ichthyoplankton samples were collected monthly from December 2003 to December 2004, with a 200 µm mesh net using horizontal surface hauls. A colder, drier period was detected, contrasting with warm months during which salinity varied depending on rainfall and whether the sandbar was open or closed. The mean abundance of ichthyoplankton over the study period was 459.6 ± 76.2 (SE) eggs · 100 m-3 and 63.6 ± 7.9 (SE) larvae · 100 m-3, and they were present during all months. Significantly higher abundances of eggs and larvae were observed during warm months. The community was dominated by the family Engraulidae followed by Clupeidae, Gobiidae and Mugilidae. Engraulidae and Clupeidae were present throughout the year, with greater abundances in months with higher temperatures. Some coastal fish species spawn in Ibiraquera Lagoon, mainly near to the sandbar, demonstrating that the lagoon is a spawning area for coastal stock. We recommend the establishment of environmental procedures to promote the conservation of Ibiraquera Lagoon and its ichthyoplankton community.

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Chordata: Fish eggs and larvae

10.1093/oso/9780199233267.003.0041 ◽

2017 ◽

Author(s):

Peter Munk ◽

Jørgen G. Nielsen

Keyword(s):

Life Cycle ◽

Tree Of Life ◽

Fish Eggs ◽

General Morphology ◽

Family Level ◽

Eggs And Larvae ◽

Fish Eggs And Larvae

This chapter describes the taxonomy of fish eggs and larvae. Most fish eggs and larvae are planktonic, and are commonly found in plankton net tows. Collectively these fish stages are referred to as ichthyoplankton. The chapter covers their life cycle, ecology, and general morphology. It includes a section that indicates the systematic placement of the taxon described within the tree of life, and lists the key marine representative illustrated in the chapter (usually to genus or family level). This section also provides information on the taxonomic authorities responsible for the classification adopted, recent changes which might have occurred, and lists relevant taxonomic sources.

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Numerical studies on the influence of the variations of the Kuroshio Path on the transport of fish eggs and larvae

GeoJournal ◽

10.1007/bf02626376 ◽

1988 ◽

Vol 16 (1) ◽

pp. 113-117 ◽

Cited By ~ 2

Author(s):

Takashige Sugimoto ◽

Masato Kobayashi

Keyword(s):

Fish Eggs ◽

Kuroshio Path ◽

Numerical Studies ◽

The Kuroshio ◽

Eggs And Larvae ◽

Fish Eggs And Larvae

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Determining seasonal dominant fish eggs and larvae species groups in the west of Tonkin Gulf

Tạp chí Khoa học và Công nghệ Biển ◽

10.15625/1859-3097/16404 ◽

2021 ◽

Vol 21 (2) ◽

pp. 171-181

Author(s):

Huy Pham Quoc ◽

Minh Nguyen Hoang

Keyword(s):

Dominant Species ◽

Species Group ◽

Fish Eggs ◽

Time And Space ◽

The West ◽

Dominant Fish ◽

Gulf Of Tonkin ◽

Species Groups ◽

Eggs And Larvae ◽

Fish Eggs And Larvae

From 2003 to 2016, 1,649 samples were collected, covering both the time and space of the Gulf of Tonkin. The results have identified groups of seasonal dominant fish eggs and larvae: Seven species groups in Spring, nine species groups in the Summer, six species groups in Autumn, and four dominant species groups in the Winter. The dominant index (Yi) ranges from 0.02 to 0.26 depending on the species group and each season of the year, the highest in the Goby group - Gobiidae (Yi = 0.26) achieved in the Spring, followed by Herringgroup - Clupeidae reaches Yi = 0.20 in the Summer and the Anchovy group - Engraulidae reaches Yi = 0.16 in the Summer. The highest advantage index is only Yi = 0.09 in the Winter for Unicorn cod species - Bregmaceros macclelandi. During this period, the number of taxa and dominant indexes tended to decrease from Spring to Winter slightly.

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