scholarly journals CHANGES IN SPECIES COMPOSITION AND ABUNDANCE OF FISH LARVAE FROM THE GULF OF TEHUANTEPEC, MEXICO

2012 ◽  
Vol 27 (2) ◽  
pp. 1
Author(s):  
O. López -Chávez ◽  
G. Aceves -Medina ◽  
R. J. Saldierna -Martínez ◽  
S. P. Jiménez -Rosenberg ◽  
J. P. Murad -Serrano ◽  
...  
Keyword(s):  
Species Composition ◽  
Gulf Of California ◽  
Larval Fish ◽  
Fish Larvae ◽  
Species Level ◽  
Unusual Condition ◽  
Gulf Of Tehuantepec ◽  
Demersal Species ◽  
High Diversity ◽  
Mesopelagic Species

The larval fish abundance and species composition of the Gulf of Tehuantepec are described based on the analysis of samples obtained from oblique zooplankton tows during summer 2007 and spring 2008. Changes in species composition and abundance between both periods were also described. A total of 145 taxa were obtained from which 73 were identified to species level, 43 to genus and 29 to family. The larval fish assemblage of the Gulf of Tehuantepec showed distinctive characteristics from other regions of the American Pacific, such as: A) a dominance of coastal-pelagic species (mainly Bregmaceros bathymaster); B) high diversity and abundance of shallow demersal species even along the oceanic stations of the study area; and C) a low proportion of mesopelagic species, an unusual condition in areas with narrow continental shelf. The diversity estimations suggest that Gulf of Tehuantepec is one of the most diverse ecosystems of the American Pacific, even as compared with other regions considered of highest diversity such as the Gulf of California. The high abundance, as well as the presence of the larval, juvenile and adult stages of B. bathymaster, suggests the importance of this region as a reproductive, nursery and recruitment for this species. Cambios en la composición de especies y abundancia de larvas de peces en el Golfo de Tehuantepec, México Se describen la composición de especies y abundancia de larvas de peces del Golfo de Tehuantepec a partir del análisis de muestras obtenidas en arrastres oblicuos de zooplancton. Así mismo, se describen los cambios en composición y abundancia entre un periodo de verano y uno de primavera. Se obtuvieron 145 taxa de los que 73 se identificaron a nivel especie, 43 a género y 29 a familia. La comunidad de larvas de peces del Golfo de Tehuantepec mostró rasgos distintivos de otras regiones similares del Pacífico Americano, tales como: A) dominancia de especies pelágico-costeras (particularmente Bregmaceros bathymaster); B) alta diversidad y abundancia de especies demersales someras aún en las estaciones mas oceánicas del área de estudio; y C) una proporción menor de especies de peces mesopelágicos, condición poco común en áreas con plataforma continental estrecha. Las estimaciones de diversidad ubican al Golfo de Tehuantepec como uno de los ecosistemas más diversos del Pacífico americano, aún comparándolo con regiones consideradas de alta diversidad a nivel mundial como es el caso del Golfo de California. La abundancia y la presencia de estadios larvales, juveniles y adultos de B. bathymaster reflejan la importancia de esta zona como área de reproducción, crianza y reclutamiento de esta especie.

scholarly journals Molecular identification of Auxis spp. larvae (Pisces: Scombridae) from the Gulf of California: Solving morphological identification limits

2018 ◽  
Vol 53 (2) ◽  
pp. 157 ◽  
Author(s):  
María J. Ochoa-Muñoz ◽  
Noé Díaz-Viloria ◽  
Laura Sánchez-Velasco ◽  
Sylvia P. A. Jiménez-Rosenberg ◽  
Ricardo Pérez-Enríquez
Keyword(s):  
Molecular Identification ◽  
Gulf Of California ◽  
Fish Larvae ◽  
Morphological Characteristics ◽  
Species Level ◽  
Morphological Identification ◽  
Larval Stages ◽  
Marine Fish Larvae ◽  
Coi Sequences ◽  
First Time

The larvae of the Auxis genus are abundant in the Gulf of California during summer; however, their identification to the species level by morphological methods is a challenge. The goal of this study was to identify A. thazard and A. rochei larvae for first time, through molecular markers using COI sequences of mtDNA, and look for distinctive morphological characteristics between species, mainly in pigmentation patterns. Larvae were obtained by zooplankton tows in 3 oceanographic cruises in the southern Gulf of California and adjacent waters. The presence of A. thazard and A. rochei larvae was genetically confirmed. The sequences of 7 larvae showed genetic divergences lower than 1% when were compared to sequences of A. thazard adults, while 15 larvae showed genetic divergences lower than 2% when where compared to sequences of A. rochei adults. Genetic divergences between both Auxis species were higher than 2%. These results suggest the spawning of both species in the Gulf of California. On the other hand, pigmentation patterns and morphometric characteristics, in all larval stages, did not permit the secure differentiation between species. Thus, the use of molecular identification by COI is recommended to identify Auxis larvae to the species level, as well as in other marine fish larvae collected in other regions of the world, that have identification troubles.

scholarly journals Ichthyoplankton Species Composition and Assemblages From the Estuary to the Hukou Section of the Changjiang River

2021 ◽  
Vol 8 ◽  
Author(s):  
Di-an Fang ◽  
Xiang-ping Xue ◽  
Dong-po Xu ◽  
Xiao-hao Wang ◽  
Ning-ze Sun ◽  
...  
Keyword(s):  
Species Composition ◽  
Water Temperature ◽  
Water Level ◽  
Fish Species ◽  
Larval Fish ◽  
Fish Larvae ◽  
Changjiang River ◽  
The Changjiang River ◽  
Level Increase ◽  
Daily Rate

Estuary river–lake (ERL) complex is critical for the development of ichthyoplankton, which plays an essential role in the breeding, nursing, and recruitment of freshwater fish species. In this study, different ERL sections were selected to investigate the ichthyoplankton assemblage from the Changjiang River estuary to its Hukou section between May 2018 and August 2020. During the study period, fish larvae of 40, 35, 54, and 46 fish species were sampled in the Rugao (RG), Nanjing (NJ) (nearby estuary), Anqing (AQ), and Hukou (HK) (connected river–lake) sections in the Changjiang River, respectively. Results on ichthyoplankton surveys revealed fluctuating assemblage patterns in the different river sections; larval fish species composition presented ecological habitat-dependent characteristics, which supported the importance of ERL complex for ichthyoplankton development. Furthermore, the density of fish larvae was negatively correlated with water transparency but positively correlated with water temperature, the daily rate of water level increase, and runoff in the limitative range. A generalized additive model analysis indicated that the hydrological factors significantly affecting larval fish abundance are water temperature, transparency, the daily rate of water level increase, and runoff (p < 0.05). These results also indicated that river estuaries and river–lake connected complexes are essential for ichthyoplankton recruitment and migration. In combination with the historical record, ichthyoplankton assemblage’s patterns in the Changjiang River lower reaches were preliminarily elucidated, although additional works are needed such as assessing effects on their survival and recruitment.

scholarly journals Fish larvae from the Gulf of California to Colima, Mexico: an update

Check List ◽  
2014 ◽  
Vol 10 (1) ◽  
pp. 106 ◽  
Author(s):  
Raymundo Avendaño-Ibarra ◽  
Gerardo Aceves-Medina ◽  
Enrique Godínez-Domínguez ◽  
Roxana De Silva-Dávila ◽  
S. Patricia A. Jiménez-Rosenberg ◽  
...  
Keyword(s):  
New Taxa ◽  
Marine Fish ◽  
Gulf Of California ◽  
Fish Larvae ◽  
Abundant Species ◽  
Species Level ◽  
Marine Fish Larvae

An updated taxonomic list of marine fish larvae from the Gulf of California to Colima, Mexico is presented. A total of 579 taxa belonging to 119 families, 256 genera, and 423 species were recorded. The list was compiled using 14 publications on fish larvae research (1974-2012), and the fish larvae identified from 315 samples collected with Bongo nets during 10 oceanographic cruises made from the Gulf of California to Bahía de Banderas, Mexico, from 2003 to 2007 (this study). The most important families in this study were the Myctophidae (28.3%), Engraulidae (25.0%), and Clupeidae (15.4%). The most abundant species were Cetengraulis mysticetus (18.2%), Benthosema panamense (13.9%), and Opisthonema libertate (12.7%). The compiled taxonomic list shows the addition of 296 new taxa to the previous list published 10 years ago, and also the need of an increase in the effort on the taxonomy of fish larvae forms not identified to species level.

scholarly journals ATLAS DE IDENTIFICACIÓN DE LARVAS DE PECES DE LA SUBDIVISIÓN ELOPOMORPHA DEL PACÍFICO MEXICANO

2013 ◽  
Vol 28 (2) ◽  
pp. 7
Author(s):  
E. A. González -Navarro ◽  
R. J. Saldierna -Martínez ◽  
G. Aceves -Medina ◽  
S. P. A. Jiménez -Rosenberg
Keyword(s):  
Gulf Of California ◽  
Baja California ◽  
Fish Larvae ◽  
Central Pacific ◽  
The West ◽  
La Paz ◽  
Mexican Pacific ◽  
Larval Fishes ◽  
Gulf Of Tehuantepec ◽  
Leptocephalus Larvae

El objetivo principal de este trabajo es presentar la composición de especies de la Subdivisión Elopomorpha, contenida en la colección científica de las larvas de peces del Pacífico Mexicano, que pertenece al Centro Interdisciplinario de Ciencias Marinas del Instituto Politécnico Nacional. Presentamos fichas descriptivas de 23 especies recolectadas con redes de arrastre de zooplancton en el Golfo de California, la Bahía de La Paz, la costa occidental de Baja California, el Pacífico Central Mexicano y el Golfo de Tehuantepec, incluyendo larvas pertenecientes a las familias Elopidae, Albulidae, Muraenidae, Ophichthyidae, Congridae y Nettastomatidae. Las descripciones proporcionan patrones morfológicos, merísticos y la pigmentación que permiten identificar las larvas leptocéfalas en nuestra colección. Identification Atlas of larval fishes of the Subdivision Elopomorpha from the Mexican Pacific The main objective of this work is to present the species composition of the Subdivision Elopomorpha, housed in the Scientific Collection of Fish larvae from the Mexican Pacific, at the Centro Interdisciplinario de Ciencias Marinas of the Instituto Politécnico Nacional. We provide descriptive cards for 23 species collected with zooplankton trawls throughout the Gulf of California, La Paz bay, the west coast of Baja California, the Mexican Central Pacific and the Gulf of Tehuantepec. Larvae belonging to the families Elopidae, Albulidae, Muraenidae, Ophichthyidae, Congridae and Nettastomatidae are included. The descriptions provide morphological, meristic and pigmentation patterns that allow to identify the leptocephalus larvae in our collection.

USING DNA BARCODE TO IMPROVE THE IDENTIFICATION OF MARINE FISH LARVAE, CASE STUDY COASTAL WATER NEAR JAKARTA AND BANDA SEA, INDONESIA

2018 ◽  
Vol 24 (1) ◽  
pp. 37 ◽  
Author(s):  
Arif Wibowo ◽  
Anthony Sisco Panggabaian ◽  
Achmad Zamroni ◽  
Asep Priatna ◽  
Helman Nur Yusuf
Keyword(s):  
Marine Fish ◽  
Dna Analysis ◽  
Larval Fish ◽  
Fish Larvae ◽  
Dna Barcode ◽  
Species Level ◽  
Marine Fish Larvae ◽  
Gene Coi ◽  
Species Specific

The sustainability of the exploitation of the Indonesian fishes depends heavily on many of fish’s basic information including both larvae distribution and dispersal. However, the identification of fish larvae and juvenile to species is very limited. In this study, we employed DNA barcoding techniques to identify marine fish larvae to a species level in Jakarta Bay and Banda Sea by comparing the querries with sequences from adult stage as reference library to contribute on biodiversity information on that particular area. The result revealed that in Jakarta Bay, the molecular marker of a 471 bp region of the mitchondrial cyctochrome c oxidase I gene (COI) has been successfully found to be species-specific, genetic distance within species (0.0 - 1.30 percent). There are total of 8 families, 5 genera and 5 species from a total 15 successful PCR that could be used to calculate the accuracy of larval fish identification in three taxonomic categories. Meanwhile in Banda Sea, for the adult specimens, after some of PCR experiment, we have successfully amplified 27 individuals, only 8 sequences available. There are a total 326 eggs and larvae which been collected from 19 stations, of the 28 successfully amplified PCR samples, 11 sequences were available for DNA analysis and at least 10 species used Banda Sea and surrounding area as their spawning ground. We prove the ability of COI barcodes to identify species level resolution from query sequences and to classify species from distinct geographical origins and determine of how the data retrieved give important information for proposing plans for conserving and managing of fisheries in the sea waters.

scholarly journals Fish larvae exploit edge vortices along their dorsal and ventral fin folds to propel themselves

2016 ◽  
Vol 13 (116) ◽  
pp. 20160068 ◽  
Author(s):  
Gen Li ◽  
Ulrike K. Müller ◽  
Johan L. van Leeuwen ◽  
Hao Liu
Keyword(s):  
Larval Fish ◽  
Fish Larvae ◽  
Fluid Dynamic ◽  
Three Dimensional ◽  
Reynolds Numbers ◽  
Bony Fish ◽  
The Body ◽  
Functional Explanation ◽  
Image Velocimetry ◽  
Median Fins

Larvae of bony fish swim in the intermediate Reynolds number ( Re ) regime, using body- and caudal-fin undulation to propel themselves. They share a median fin fold that transforms into separate median fins as they grow into juveniles. The fin fold was suggested to be an adaption for locomotion in the intermediate Reynolds regime, but its fluid-dynamic role is still enigmatic. Using three-dimensional fluid-dynamic computations, we quantified the swimming trajectory from body-shape changes during cyclic swimming of larval fish. We predicted unsteady vortices around the upper and lower edges of the fin fold, and identified similar vortices around real larvae with particle image velocimetry. We show that thrust contributions on the body peak adjacent to the upper and lower edges of the fin fold where large left–right pressure differences occur in concert with the periodical generation and shedding of edge vortices. The fin fold enhances effective flow separation and drag-based thrust. Along the body, net thrust is generated in multiple zones posterior to the centre of mass. Counterfactual simulations exploring the effect of having a fin fold across a range of Reynolds numbers show that the fin fold helps larvae achieve high swimming speeds, yet requires high power. We conclude that propulsion in larval fish partly relies on unsteady high-intensity vortices along the upper and lower edges of the fin fold, providing a functional explanation for the omnipresence of the fin fold in bony-fish larvae.

scholarly journals Osmotic induction improves batch marking of larval fish otoliths with enriched stable isotopes

2014 ◽  
Vol 71 (9) ◽  
pp. 2530-2538 ◽  
Author(s):  
Emmanuel de Braux ◽  
Fletcher Warren-Myers ◽  
Tim Dempster ◽  
Per Gunnar Fjelldal ◽  
Tom Hansen ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Salmo Salar ◽  
Larval Fish ◽  
Fish Larvae ◽  
Cost Effective ◽  
Industrial Applications ◽  
Chemical Markers ◽  
Potential Applications ◽  
Recent Method ◽  
Batch Marking

Abstract Otolith marking with enriched stable isotopes via immersion is a recent method of batch marking larval fish for a range of research and industrial applications. However, current immersion times and isotope concentrations required to successfully mark an otolith limit the utility of this technique. Osmotic induction improves incorporation and reduces immersion time for some chemical markers, but its effects on isotope incorporation into otoliths are unknown. Here, we tested the effects of osmotic induction over a range of different isotope concentrations and immersion times on relative mark success and strength for 26Mg:24Mg, 86Sr:88Sr and 137Ba:138Ba on Atlantic salmon (Salmo salar) larvae. 71% and 100% mark success were achieved after 1 h of immersion for 86Sr (75 µg L−1) and 137Ba (30 µg L−1) isotopes, respectively. Compared with conventional immersion, osmotic induction improved overall mark strength for 86Sr and 137Ba isotopes by 26–116%, although this effect was only observed after 12 h of immersion and predominately for 86Sr. The results demonstrate that osmotic induction reduces immersion times and the concentrations of isotope required to achieve successful marks. Osmotically induced isotope labels via larval immersion may prove a rapid and cost-effective way of batch marking fish larvae across a range of potential applications.

scholarly journals Feeding of the Brycon cephalus, Triportheus elongatus and Semaprochilodus insignis (osteichthyes, characiformes) larvae in Solimões/Amazonas River and floodplain areas.

2002 ◽  
Vol 32 (3) ◽  
pp. 499-499 ◽  
Author(s):  
Rosseval Galdino LEITE ◽  
Carlos A.R.M. ARAUJO-LIMA
Keyword(s):  
Food Item ◽  
Prey Size ◽  
Larval Fish ◽  
Fish Larvae ◽  
Trophic Relations ◽  
Fish Feeding ◽  
Important Species ◽  
Flooded Forests ◽  
Commercially Important

Information on larval fish feeding is essential for understanding their trophic relations, including the management in conditions totally or partially controlled by humans. An experiment was designed to evaluate the larval diets of three commercially important species. Four varzea-lakes and the adjacent river were sampled with bongo and hand nets from January 1993 to November 1995. Larval diets were evaluated by length-classes and capture sites, and were tested by two factor ANOVA. The larvae were feeding in all habitats, except in the flooded forests. The three species had different diets, which varied with their length and lake. The rotifers were the main initial food item of the three species, replaced by fish larvae in Brycon cephalus, cladocerans in Triportheus elongatus and detritus in Semaprochilodus insignis. The increase of the ingestion limit, as the larvae grew, was higher than the increase in the consumed prey size for the three species.

scholarly journals Larval Fish Community in the Northwestern Iberian Upwelling System during the Summer Period

Oceans ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 700-722
Author(s):  
Sonia Rábade Uberos ◽  
Alba Ruth Vergara Castaño ◽  
Rosario Domínguez-Petit ◽  
Fran Saborido-Rey
Keyword(s):  
Community Composition ◽  
Fish Community ◽  
Larval Fish ◽  
Life Stages ◽  
Early Life Stages ◽  
Summer Period ◽  
Specific Composition ◽  
Larval Production ◽  
High Diversity ◽  
Northwestern Iberian Peninsula

The Galician shelf (northwestern Iberian Peninsula) is a highly dynamic area with an important multi-species fisheries industry that exploits resources from several habitats, characterized by being not only highly diverse, rich, and productive but also seasonally and interannually variable. Early life stages of different species are distributed throughout the year, with fluctuating abundances and community composition. Likewise, the influence of environmental factors and processes on larval production and survival remains unknown. Sampling was carried out in July 2012, and all the larvae obtained were identified to establish the specific composition of the community in a summer upwelling scenario. The results show no zonation in the species distribution, a consequence of the mixing effects of the upwelling and eddies, with high diversity but low abundance, which render in a slight predominance of a few species. Due to the dependence of planktonic populations on upwelling events, which was not highly pronounced in 2012, we cannot conclude that this was a typical conformation of the Galician summer larval fish community, but it is a first approach to comprehend the community composition.

scholarly journals Spatial distribution and species composition of small pelagic fishes in the Gulf of California

2006 ◽  
Author(s):  
Edgar Lanz ◽  
Manuel O. Nevárez Martínez ◽  
Juana López Martínez ◽  
Juan A. Dworak
Keyword(s):  
Spatial Distribution ◽  
Species Composition ◽  
Gulf Of California ◽  
Pelagic Fishes
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