scholarly journals Three-dimensional distribution of small pelagic fish larvae (Sardinops sagax and Engraulis mordax) in a tidal-mixing front and surrounding waters (Gulf of California)

2010 ◽  
Vol 32 (9) ◽  
pp. 1241-1254 ◽  
Author(s):  
E. A. Inda-Diaz ◽  
L. Sanchez-Velasco ◽  
M. F. Lavin
Keyword(s):  
Gulf Of California ◽  
Fish Larvae ◽  
Three Dimensional ◽  
Pelagic Fish ◽  
Tidal Mixing ◽  
Small Pelagic Fish ◽  
Dimensional Distribution ◽  
Tidal Mixing Front ◽  
Sardinops Sagax ◽  
Engraulis Mordax

scholarly journals ANALYSIS OF THE VERTICAL DISTRIBUTION OF THE ABUNDANCE OF SMALL PELAGIC FISH LARVAE IN THE GULF OF CALIFORNIA USING SUBMARINE VIDEOCAMERAS

2009 ◽  
Vol 24 (2) ◽  
pp. 153
Author(s):  
G. Aceves-Medina ◽  
C. J. Robinson ◽  
R. Palomares-García ◽  
J. Gómez-Gutierrez
Keyword(s):  
Vertical Distribution ◽  
Gulf Of California ◽  
Fish Larvae ◽  
Pelagic Fish ◽  
Small Pelagic Fish ◽  
Sardinops Sagax ◽  
Etrumeus Teres ◽  
Engraulis Mordax ◽  
The Vertical Distribution

Análisis de la distribucion vertical de la abundancia de larvas de peces pelágicos menores en el Golfo de California mediante videocámaras submarinas Se utilizaron dos tipos de videocámaras submarinas para estudiar la distribución y abundancia vertical de larvas de los peces pelágicos menores Engraulis mordax, Etrumeus teres y Sardinops sagax a 1 m de resolución, en una localidad en el norte del Golfo de California con condiciones de calma y alta densidad de sardinas adultas. La mayor abundancia promedio (900 larvas m -1 min -1 ) se encontró inmediatamente arriba de la termoclina (33 m) y la picnoclina (36 m), aparentemente no asociada al máximo de clorofila detectado en superficie, ni a la mayor densidad de peces adultos (10 -20 m). Las observaciones con video permitieron determinar la distribución vertical a una resolución imposible de obtener mediante muestreos con redes; sin embargo, esta es una técnica poco útil en zonas con elevada velocidad de las corrientes.

The effects of a tidal-mixing front on the distribution of larval fish habitats in a semi-enclosed sea during winter

2014 ◽  
Vol 94 (7) ◽  
pp. 1517-1530 ◽  
Author(s):  
Emilio A. Inda-Díaz ◽  
Laura Sánchez-Velasco ◽  
Miguel F. Lavín
Keyword(s):  
Gulf Of California ◽  
Larval Fish ◽  
Three Dimensional ◽  
Wide Distribution ◽  
Tidal Mixing ◽  
Larval Abundance ◽  
North West ◽  
North East ◽  
Tidal Mixing Front ◽  
Fish Habitats

We examined the effect of a tidal-mixing front on the three-dimensional distribution of larval fish habitats (LFHs) in the Midriff Archipelago Region in the Gulf of California during winter. Zooplankton and environmental variables were sampled from 0 to 200 m in 50 m strata. Four LFHs were defined in association with the front, two on the northern side and two on the southern side. The northern LFHs were: (1) the Mainland Shelf Habitat, located from the surface to 100 m depth on the north-east mainland shelf, characterized mainly by the presence of Citharichtys fragilis; and (2) the Wide Distribution Habitat, extending from north-west to south across the front from the surface to 200 m depth, dominated by the ubiquitous Engraulis mordax. The southern LFHs were: (3) the Eddy Zone Habitat, defined nearly on an anticyclonic eddy, with the highest larval abundance and richness from the surface to 100 m depth, dominated by Leuroglossus stilbius; and (4) the Southern Gulf Habitat, associated with low temperature waters from the southern Gulf of California, dominated by southern-gulf species (e.g. Scomber japonicus and Sardinops sagax). Despite the weak stratification and low thermal contrast (~1.5°C) across the south front compared to summer (~3°C), our results demonstrate that the frontal zone may influence the formation of planktonic habitats even during generally homogeneous periods, which may also be relevant in other regions of the world.

Three-dimensional distribution of fish larvae in a cyclonic eddy in the Gulf of California during the summer

2013 ◽  
Vol 75 ◽  
pp. 39-51 ◽  
Author(s):  
L. Sánchez-Velasco ◽  
M.F. Lavín ◽  
S.P.A. Jiménez-Rosenberg ◽  
V.M. Godínez ◽  
E. Santamaría-del-Angel ◽  
...  
Keyword(s):  
Gulf Of California ◽  
Fish Larvae ◽  
Three Dimensional ◽  
Cyclonic Eddy ◽  
Dimensional Distribution ◽  
Distribution Of Fish

The box-balance model: a new tool to assess fish larval survival, applied to field data on two small pelagic fish

2020 ◽  
Vol 650 ◽  
pp. 289-308 ◽  
Author(s):  
V Raya ◽  
J Salat ◽  
A Sabatés
Keyword(s):  
Field Data ◽  
Fish Larvae ◽  
Larval Growth ◽  
Warming Trend ◽  
Mortality Rates ◽  
Larval Survival ◽  
Pelagic Fish ◽  
Balance Model ◽  
Small Pelagic Fish ◽  
Mesoscale Structures

This work develops a new method, the box-balance model (BBM), to assess the role of hydrodynamic structures in the survival of fish larvae. The BBM was applied in the northwest Mediterranean to field data, on 2 small pelagic fish species whose larvae coexist in summer: Engraulis encrasicolus, a dominant species, and Sardinella aurita, which is expanding northwards in relation to sea warming. The BBM allows one to quantify the contribution of circulation, with significant mesoscale activity, to the survival of fish larvae, clearly separating the effect of transport from biological factors. It is based on comparing the larval abundances at age found in local target areas, associated with the mesoscale structures (boxes), to those predicted by the overall mortality rate of the population in the region. The application of the BBM reveals that dispersion/retention by hydrodynamic structures favours the survival of E. encrasicolus larvae. In addition, since larval growth and mortality rates of the species are required parameters for application of the BBM, we present their estimates for S. aurita in the region for the first time. Although growth and mortality rates found for S. aurita are both higher than for E. encrasicolus, their combined effect confers a lower survival to S. aurita larvae. Thus, although the warming trend in the region would contribute to the expansion of the fast-growing species S. aurita, we can confirm that E. encrasicolus is well established, with a better adapted survival strategy.

Hydroacoustical Survey of Near-Surface Distribution, Abundance and Biomass of Small Pelagic Fish in the Gulf of California

2012 ◽  
Vol 66 (3) ◽  
pp. 311-326 ◽  
Author(s):  
José Francisco Domínguez-Contreras ◽  
Carlos J. Robinson ◽  
Jaime Gómez-Gutiérrez
Keyword(s):  
Gulf Of California ◽  
Pelagic Fish ◽  
Small Pelagic Fish ◽  
Surface Distribution ◽  
Near Surface

scholarly journals Three-dimensional distribution of larval fish assemblages in an anticyclonic eddy in a semi-enclosed sea (Gulf of California)

2012 ◽  
Vol 34 (6) ◽  
pp. 548-562 ◽  
Author(s):  
Fernando Contreras-Catala ◽  
Laura Sánchez-Velasco ◽  
Miguel F. Lavín ◽  
Victor M. Godínez
Keyword(s):  
Gulf Of California ◽  
Fish Assemblages ◽  
Larval Fish ◽  
Three Dimensional ◽  
Anticyclonic Eddy ◽  
Dimensional Distribution

scholarly journals KELIMPAHAN ZOOPLANKTON DAN BIOMASSA IKAN TERI (Stolephorus spp.) PADA BAGAN DI PERAIRAN KWATISORE TELUK CENDERAWASIH PAPUA (Abundance of Zooplankton and Biomass of Anchovy (Stolephorus spp.) of Liftnet at Kwatisore Bay, Cendrawasih Gulf, Papua)

2016 ◽  
Vol 6 (2) ◽  
pp. 143
Author(s):  
Amelian Dinisia ◽  
Enan M. Adiwilaga ◽  
. Yonvitner
Keyword(s):  
National Park ◽  
Fish Larvae ◽  
Pelagic Fish ◽  
Zooplankton Biomass ◽  
Fishing Gear ◽  
Important Food ◽  
Small Pelagic Fish ◽  
Park Area ◽  
Almost All ◽  
Euterpina Acutifrons

ABSTRACT<br /><br />Millions of organisms can be found in the Cenderawasih Gulf National Park area, especially in the waters of the Kwatisore Bay, Nabire and has been well-known to almost all over the world. Large zooplankton is an important food for migrated fish larvae and all kinds of fish including anchovies. Anchovy is the food of large and small pelagic fish groups. Groups of fish that use plankton as food were included anchovy. The main catch product of lift net at the Kwatisore bay is anchovy (Stolephorus spp.). This study aims to assess the level of availability of anchovy in relation to the abundance of zooplankton as food and to analyze the influence of anchovy fishing activities with lift net fishing gear. The results were obtained 51 species of zooplankton, which consists of 44 types holoplankton and 7 types of meroplankton. There were 17 species of zooplankton were found in the stomach of anchovy with the subgroup dominated by copepods (73.51 %). Among 17 species of zooplankton there 2 types that were found in all four sampling periods, namely Calanus sp. 2 and Euterpina acutifrons. There is a relationship between the abundance of individual zooplankton in the waters of the anchovy biomass and also between the abundance of zooplankton and biomass of anchovy.<br /><br />Keywords: abundance of zooplankton, biomass of anchovy, lift net at Kwatisore<br />-------<br /><br />ABSTRAK<br /><br />Jutaan organisme dapat ditemukan dalam kawasan Taman Nasional Teluk Cenderawasih khususnya di perairan Kwatisore, Nabire dan telah terkenal sampai hampir ke seluruh dunia. Zooplankton berukuran besar merupakan makanan penting bagi ikan-ikan yang bermigrasi dan larva semua jenis ikan termasuk didalamnya ikan teri. Ikan teri merupakan makanan dari kelompok ikan pelagis besar dan kecil. Kelompok ikan-ikan yang banyak memanfaatkan plankton dari kelompok ikan pelagis kecil diantaranya ikan teri. Hasil tangkapan utama bagan penangkap ikan pelagis kecil di perairan Kwatisore ialah jenis teri (Stolephorus sp.). Tujuan penelitian ini adalah untuk mengkaji tingkat ketersediaan ikan teri dalam kaitannya dengan kelimpahan zooplankton sebagai makanannya serta menganalisis pengaruh dari aktivitas penangkapan ikan teri dengan alat tangkap bagan. Secara keseluruhan dari seluruh stasiun dalam setiap periode sampling, diperoleh 51 jenis zooplankton yang terdiri atas 44 jenis holoplankton dan 7 jenis meroplankton. Terdapat 17 jenis zooplankton yang ditemukan dalam lambung ikan teri dengan didominasi oleh Sub-grup Copepoda (73,51%). Diantara ke-17 jenis zooplankton tersebut terdapat 2 jenis yang ditemukan pada keempat periode sampling yaitu Calanus Sp.2 dan Euterpina acutifrons. Hasil analisis regresi linier antara biomassa ikan teri hasil tangkapan bagan dan kelimpahan maupun antara biomassa ikan teri hasil tangkapan bagan dan jumlah jenis zooplankton menunjukkan adanya korelasi positif.<br /><br />Kata kunci: kelimpahan zooplankton, biomassa ikan teri, bagan di Kwatisore

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