Ichthyoplankton community of the Dardanelles Strait, Turkey

2017 ◽  
Vol 46 (3) ◽  
Author(s):  
İsmail Burak Daban ◽  
Ahsen Yüksek
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Teleost Fish ◽  
Dominant Species ◽  
Fish Larvae ◽  
The Other ◽  
Fish Eggs ◽  
One Year ◽  
Eggs And Larvae ◽  
Fish Eggs And Larvae

AbstractAn ichthyoplankton survey was conducted between March 2012 and February 2013 along the Anatolian coast of the Dardanelles Strait, with the aim of describing the species composition and temporal variation of fish eggs and larvae. For this purpose, monthly samples were collected at three sites using a WP-2 plankton net equipped with 500 µm mesh during a one-year period. Biodiversity indices were calculated to understand differences in biodiversity. A total of 50 teleost fish species belonging to 25 families and 7 orders were identified. The highest species richness of fish eggs was recorded in spring, whereas the highest species richness of fish larvae – in spring and summer. On the other hand, species richness of fish eggs and larvae were at a minimum in the fall. The most dominant species recorded in the Dardanelles were

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

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.

Species Composition of Fish eggs and Larvae in the Coastal Water of Nang Island, Yeosu

2021 ◽  
Vol 33 (5) ◽  
pp. 1038-1047
Author(s):  
Seung-Yong KIM ◽  
Tae-Sik YU ◽  
Jin-Joo WOO ◽  
Seong-Hoon LEE ◽  
Kyeong-Ho HAN
Keyword(s):  
Species Composition ◽  
Coastal Water ◽  
Fish Eggs ◽  
Eggs And Larvae ◽  
Fish Eggs And Larvae

scholarly journals Ichthyoplankton distribution and abundance off southeastern and southern Brazil

2004 ◽  
Vol 47 (4) ◽  
pp. 601-612 ◽  
Author(s):  
Débora Martins de Freitas ◽  
José Henrique Muelbert
Keyword(s):  
Coastal Waters ◽  
Fish Larvae ◽  
Bottom Layer ◽  
Brazilian Coast ◽  
Fish Eggs ◽  
Near Shore ◽  
Partial Overlap ◽  
Eggs And Larvae ◽  
Distribution Of Fish ◽  
Fish Eggs And Larvae

This study describes the distribution of fish eggs and larvae along the southeastern and southern Brazilian coast. Plankton samples were collected at 85 stations using a Bongo net, and water salinity and temperature were profiled with a CTD. Results showed that fish eggs and larvae, and zooplankton biovolume were distributed in coastal waters with mean temperature of 23ºC and salinity between 33 and 34. The largest egg abundance occurred along Iguape (24º'S) with a partial overlap with zooplankton biovolume and fish larvae were most abundant near shore close to Santos (24ºS). These protected coastal waters presented a surface layer with lower salinity and higher temperatures, while the bottom layer had cooler water. Ichthyoplankton abundance was low off Cabo Frio (22º'S), while a maximum in fish eggs occurred around Cabo Santa Marta Grande (28ºS).

Variability and capture efficiency of bongo and Tucker trawl samplers in the collection of ichthyoplankton and other macrozooplankton

1997 ◽  
Vol 54 (4) ◽  
pp. 765-773 ◽  
Author(s):  
P Pepin ◽  
T H Shears
Keyword(s):  
Larval Fish ◽  
Fish Larvae ◽  
Sample Volume ◽  
Capture Efficiency ◽  
Fish Eggs ◽  
Sample Mean ◽  
Sampling Variability ◽  
Wide Range ◽  
Eggs And Larvae ◽  
Fish Eggs And Larvae

We examined the sampling variability and capture efficiency of bongo nets and a modified Tucker trawl used in the sampling of ichthyoplankton and other macrozooplankton by taking seven replicate samples at each of two stations on two separate occasions. Sample variance was highly significantly related to sample mean for all major taxonomic categories (i.e., fish eggs, fish larvae, crustaceans, and medusae-chaetognaths). Sampling variability of the bongo nets was significantly greater than that of the Tucker trawl for both fish eggs and larvae. Sampling variability of macrozooplankton was significantly greater than that of ichthyoplankton. For larval fish of 5 mm or less, bongo nets generally yielded higher estimates of abundance than the Tucker trawl and the reverse was true for lengths above 10 mm, but there was a significant influence of species-specific morphological characters. The large sample volume of the Tucker trawl relative to the bongo nets resulted in significantly higher estimates of species diversity for fish eggs and larvae but not for crustaceans or medusae. Although bongo and Tucker samplers are efficient at catching a wide range of sizes of larval fish, the latter's lower variability may make it a more effective sampler.

Chordata: Fish eggs and larvae

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.

scholarly journals Composition and diversity of anurans in the Restinga of the Conde municipality, northern coast of the state of Bahia, northeastern Brazil

2016 ◽  
Vol 16 (3) ◽  
Author(s):  
Felipe Augusto Trindade Gondim-Silva ◽  
Alessandra Rodrigues Santos Andrade ◽  
Rafael Oliveira Abreu ◽  
Jamile Santos Nascimento ◽  
Geovane Paixão Corrêa ◽  
...  
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Species Composition ◽  
Rainy Season ◽  
Dominant Species ◽  
The State ◽  
Northeastern Brazil ◽  
Freshwater Wetland ◽  
Northern Coast ◽  
Anuran Species

Abstract The Conde municipality is located in the northern coast of the state of Bahia (NC), northeastern Brazil, and is part of the Atlantic Tropical domain. The anuran fauna of the northern portion of the NC is still poorly known if compared to the southern portion. The Restinga is one of the predominant environments of the coastal plains of the NC and it is characterized essentially by presenting sandy soil covered by herbaceous and shrubby vegetation. The objective of this study was to determine the anuran species composition and diversity for the Restinga of the Conde municipality. Sampling was carried out at night by active search over four periods of five consecutive days each, two over the 'main rainy season' and two in a 'lesser rainy season', using 14 sample units (SUs) and five extra sample plots (EPs). We calculated dominance and species diversity using the Berger-Parker and Shannon-Wiener H' indices, respectively. We used accumulation curves and the Jackknife 1 estimator to estimate anuran species richness, considering only the data obtained from the SUs. We recorded 713 anuran specimens distributed within 33 species, 13 genera and five families (Bufonidae, Craugastoridae, Hylidae, Leptodactylidae and Microhylidae). The Hylidae and Leptodactylidae families had the highest species richness. Considering only the SUs (Jackknife 1 estimator in brackets), we recorded 28 species in the study area (33.9 ± 2.3), 13 in Shrubby Vegetation Zones - SVZ (20.8 ± 2.9) and 25 in Freshwater Wetland Zones - FWZ (28.9 ± 1.9). The abundance and species diversity of the FWZ (n = 638 specimens; H'= 2.4) were higher than those recorded for the SVZ (n = 52 specimens; H' = 1.9). The SVZ and FWZ showed distinct dominant species, wherein Pristimantis paulodutrai was the dominant species in SVZ and Scinax fuscomarginatus in FWZ. The Restinga of the Conde municipality stands out as the one with the highest anuran species richness already recorded considering only SVZ and FWZ. Moreover, its anuran species composition represented 55% of the anuran species known for the NC and included taxa common to three different morphoclimatic domains (Tropical Atlantic, Cerrado and Caatinga).

scholarly journals Can anthropic fires affect epigaeic and hypogaeic Cerrado ant (Hymenoptera: Formicidae) communities in the same way?

2016 ◽  
Vol 64 (1) ◽  
pp. 95 ◽  
Author(s):  
Ernesto Oliveira Canedo-Júnior ◽  
Rafael Gonçalves Cuissi ◽  
Nelson Henrique De Almeida Curi ◽  
Guilherme Ramos Demetrio ◽  
Chaim José Lasmar ◽  
...  
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Recovery Time ◽  
Fire Effects ◽  
Control Area ◽  
Control Group ◽  
Ant Communities ◽  
Fire Event ◽  
Biological Communities ◽  
One Year

Fire occurrences are a common perturbation in Cerrado ecosystems, and may differently impact the local biodiversity. Arthropods are one of the taxa affected by fires, and among them, ants are known as good bioindicators. We aimed to evaluate the effect of anthropic fires on epigaeic and hypogaeic ant communities (species richness and composition) in Cerrado areas with different post-fire event recovery periods. We conducted the study in four Cerrado areas during two weeks of 2012 dry season: one unburned and three at different post-fire times (one month, one and two years). We sampled ants with pitfall traps in epigaeic and hypogaeic microhabitats. We collected 71 ant morpho-species from 25 genera. In the epigaeic microhabitat we sampled 56 morpho-species and 42 in the hypogaeic microhabitat. The area with the shortest recovery time presented lower epigaeic ant species richness (4.3 ± 2.00) in comparison to the other areas (8.1 ± 2.68 species on one year area; 10.3 ± 2.66 species on two years area; 10.4 ± 2.31 species on control area), but recovery time did not affect hypogaeic ant species richness. Regarding ant species composition, fire did not directly affect hypogaeic ant species, which remained the same even one month after fire event. However, two years were not enough to reestablish ant species composition in both microhabitats in relation to our control group samples. Our study is the first to assess anthropic fire effects upon epigaeic and hypogaeic ants communities; highlighting the importance of evaluating different microhabitats, to more accurately detect the effects of anthropic disturbances in biological communities. We concluded that ant communities are just partially affected by fire occurrences, and epigaeic assemblages are the most affected ones in comparison to hypogaeic ants. Furthermore the study provides knowledge to aid in the creation of vegetation management programs that allow Cerrado conservation.

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