scholarly journals Fish larvae off the northwestern coast of the Baja California Peninsula, Mexico

Check List ◽  
2010 ◽  
Vol 6 (2) ◽  
pp. 334 ◽  
Author(s):  
S. Patricia A. Jiménez-Rosenberg ◽  
Ricardo J. Saldierna-Martínez ◽  
Gerardo Aceves-Medina ◽  
Alejandro Hinojosa-Medina ◽  
René Funes-Rodríguez ◽  
...  
Keyword(s):  
Reproductive Behavior ◽  
Fish Assemblage ◽  
Community Dynamics ◽  
Baja California ◽  
Larval Fish ◽  
Fish Larvae ◽  
Distribution Patterns ◽  
Baja California Peninsula ◽  
Important Species ◽  
Commercially Important

The structure of the larval fish assemblage of the northwestern Pacific coast of Mexico is analyzed from zooplankton samples taken between 1998 and 2000 off northern and southern Baja California Peninsula. The 198 fish taxa identified reflected the faunal complexity reported previously for the area. Adult distribution patterns and reproductive behavior, added to the environmental seasonality and bathymetric characteristics of the coast, explained differences in the larval fish assemblage. Larvae of meso- and bathypelagics Vinciguerria lucetia, Diogenichthys laternatus, and Triphoturus mexicanus were the most abundant year round. Larvae of commercially important species, such as Engraulis mordax, Sardinops sagax, Merluccius productus, and Trachurus symmetricus, were also abundant during winter and spring, depending on the year and surveyed region. Adult distribution patterns and reproductive behavior, intra- and interannual environmental variability, and bathymetric characteristics of the coast all likely contributed to the differences in the larval fish community through space and time. For example, the abundance of temperate species in northern Baja California was relatively low when warm-water El Niño conditions prevailed in 1998 but increased during the cool-water La Niña period in 1999 and 2000. The results enhance knowledge of the community dynamics of fishes in an ecologically complex and commercially important region.

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.

The larval fish assemblage of the Nornalup-Walpole Estuary, a permanently open estuary on the southern coast of Western Australia

1994 ◽  
Vol 45 (7) ◽  
pp. 1193 ◽  
Author(s):  
FJ Neira ◽  
IC Potter
Keyword(s):  
Western Australia ◽  
Fish Assemblage ◽  
Larval Fish ◽  
Fish Larvae ◽  
Marine Species ◽  
Abundant Species ◽  
Entrance Channel ◽  
Southern Coast ◽  
Outer Basin

Fish larvae were sampled in the entrance channel and in the two basins of the permanently open Nornalup-Walpole Estuary, on the southern coast of Western Australia, in each month between October 1989 and September 1990. Sampling yielded a total of 39 068 larvae belonging to 36 species and 23 families, with the engraulidid Engraulis australis (56.7%) and the gobies Pseudogobius olorum (24.4%) and Favonigobius lateralis (15.0%) being the most abundant species. Most of the larvae were caught between November and March, with the concentrations of the most abundant species reaching peaks between January and March, when water temperatures had reached 21-24�C. In terms of number of larvae, the larval fish assemblage in the basins was dominated by species that spawn within the estuary, with the larvae of these species contributing ≥98.7% to the totals at the basin sites. Although the larvae of 26 marine species were caught in the entrance channel, these were either rare or absent in the basins, except for those of the terapontid Pelates sexlineatus, which were moderately abundant in the outer basin. The fact that the larvae of most of these marine species were at the preflexion stage, and that all but three of those species had never been previously recorded as either juveniles or adults within the system, indicates that they were passively transported from outside the estuary. The absence of larvae of most of the marine teleosts that are abundant in the basins of the Nornalup-Walpole Estuary parallels the situation in the nearby and seasonally closed Wilson Inlet.

scholarly journals Sympatric Clupeoid Fish Larvae in the Northeastern Mediterranean: Coexistence or Avoidance?

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Athanassios C. Tsikliras
Keyword(s):  
Fish Larvae ◽  
Aegean Sea ◽  
Distribution Patterns ◽  
European Anchovy ◽  
Direct Competition ◽  
Commercially Important ◽  
Northern Aegean Sea ◽  
Sardinella Aurita ◽  
Clupeoid Fish ◽  
Competition For Resources

The summer (July 2002 and 2003) larval concentrations of two commercially important clupeoid species (order: Clupeiformes), the European anchovy (Engraulis encrasicolus) and round sardinella (Sardinella aurita), were measured in Kavala Gulf (northern Aegean Sea), in order to examine their distribution patterns. Anchovy was generally most abundant, reaching 13 852 larvae 10 m−2 in 2003 and occurred in more stations compared to round sardinella. Despite the spawning of both species occurring across the entire gulf, the general spatial distribution of their larvae was different, with European anchovy larvae occupying the entire gulf and round sardinella larvae mainly concentrated at offshore stations. The reason proposed for the spatial segregation of their larvae is direct competition for resources. Yet, coexistence of the two species was observed in frontal areas with abundant food resources that prevent competition.

scholarly journals Environmental conditions influencing the larval fish assemblage during summer in the Gulf of Gabes (Tunisia: South central Mediterranean)

2015 ◽  
Vol 16 (3) ◽  
pp. 666 ◽  
Author(s):  
W. K. KOCHED ◽  
F. ALEMANY ◽  
S. BEN ISMAIL ◽  
R. BENMESSAOUD ◽  
Α. HATTOUR ◽  
...  
Keyword(s):  
Fish Assemblage ◽  
Fish Assemblages ◽  
Larval Fish ◽  
Fish Larvae ◽  
Surface Mixed Layer ◽  
Gulf Of Gabes ◽  
Predator Species ◽  
Pelagic Species ◽  
Gulf Of Gabès ◽  
South Central

An oceanographic survey was carried out during the summer of 2009, from June 25 to July 3 in the Gulf of Gabes. The study area is characterized by a wide continental shelf.A plankton sampling scheme was carried out to study the structure of the larval fish assemblages that characterizes the surface mixed layer, and to assess the influence of the environmental parameters on their spatial distribution.A total of 36 taxa were identified, 3 classified to the level of genus, 5 to family and 28 to species. The majority of identified fish larvae belonged to demersal species, mainly picarel Spicara smaris (23.76% of the total larval fish abundance), followed by red mullet Mullus barbatus (14.92%) and several species of the Sparidae family (9.15%). Small pelagic species as Sardinella Sardinella aurita and European anchovy Engraulis encrasicolus were also abundant (27.75 %) and dominated the fish larvae community in offshore stations. Five large pelagic species were found among the larvae, including bullet tuna Auxis rochei, Atlantic black skipjack Euthynnus alletteratus, albacore Thunnus alalunga, swordfish Xiphias gladius and the highly migratory Atlantic bluefin tuna Thunnus thynnus. All these apex predator species appear in 38.5% of the sampling stations and contribute about 7.9% of the total larval catches. The larval fish assemblage of the Gulf of Gabes is predominantly composed of neritic species in correspondence with the shallow depths of the study area. Canonical Correspondence Analysis (CCA) showed that larval distributions were mainly conditioned by depth. However, other factors, like hydrographic processes, play also a very important role in shaping the spatial pattern of larval fish distribution.

Seasonal abundance of fish larvae in a subtropical lagoon in the west coast of the Baja California Peninsula

2004 ◽  
Vol 61 (1) ◽  
pp. 125-135 ◽  
Author(s):  
Raymundo Avendaño-Ibarra ◽  
René Funes-Rodrı́guez ◽  
Alejandro Hinojosa-Medina ◽  
Rogelio González-Armas ◽  
Gerardo Aceves-Medina
Keyword(s):  
West Coast ◽  
Baja California ◽  
Fish Larvae ◽  
Seasonal Abundance ◽  
Baja California Peninsula ◽  
The West ◽  
Subtropical Lagoon

scholarly journals Influence of Levantine Artificial Reefs on the fish assemblage of the surrounding seabed

2009 ◽  
Vol 10 (1) ◽  
pp. 35 ◽  
Author(s):  
D. EDELIST ◽  
E. SPANIER
Keyword(s):  
Fish Assemblage ◽  
Artificial Reef ◽  
Artificial Reefs ◽  
Hard Substrate ◽  
Steady Increase ◽  
Important Species ◽  
Main Species ◽  
Commercially Important ◽  
Lessepsian Migrants ◽  
Siganus Rivulatus

Four Artificial Reef (AR) units were deployed at a 20m depth on a flat hard substrate 3 km west of Haifa, Israel and then surveyed for fish for 12 months. AR units supported 20 times the biomass of control quadrates and their enrichment impact was still significant at a radius of 13m away from units. The 13m values were also significantly higher than those of quadrates adjacent to units, suggesting the existence of a halo of relative depletion within the outer enrichment halo. The main species contributing to this pattern was the migrant herbivore Siganus rivulatus. A decrease in grazing resources is thus suggested as an explanation for creation of this halo. The most consistent AR residents were also Lessepsian migrants - Sargocentron rubrum, nocturnal predators which displayed high microhabitat fidelity and a steady increase in density. The 6 species of migrants recorded accounted for 65.3% of the commercially exploitable biomass and 25.2% of the specimens in the AR site. Other constant AR residents were the groupers Epinephelus costae and Epinephelus marginatus, which are rare and commercially important species. Site protection from fishing and storms were found to be of utmost importance, and design and deployment considerations are discussed.

Interactions of fish and pelagic coelenterates

1988 ◽  
Vol 66 (9) ◽  
pp. 1913-1927 ◽  
Author(s):  
Mary Needler Arai
Keyword(s):  
Chum Salmon ◽  
Larval Fish ◽  
Trophic Position ◽  
Stomach Contents ◽  
Caloric Content ◽  
Feeding Rates ◽  
Intermediate Hosts ◽  
Important Species ◽  
Atlantic Mackerel ◽  
Commercially Important

Coelenterates may be predators or prey of fish, act as intermediate hosts for parasites, or provide shelter. At least 42 species of fish, including such commercially important species as the spiny dogfish, chum salmon, Atlantic mackerel, and various gadoids, include pelagic coelenterates in their diets. Coelenterates may represent a substantial proportion of the fish stomach contents and preliminary data on caloric content of coelenterates is available. However, in the absence of measured digestion rates it is not possible to calculate feeding rates or assess the dietary importance of coelenterates to fish. Similarly, although many instances of coelenterates eating larval fish are known, only a few measurements of predation rates based on feeding rates and abundances of predator and prey have yet been made. Recent studies with newer sampling methods indicate that the biomass of coelenterates, particularly large scyphomedusae, has been underestimated. Hence, much quantitative work needs to be done on the interactions of coelenterates with both fish and other marine groups to evaluate their trophic position and importance in pelagic ecosystems.

Rehabilitation and Movement of a Blind California Sea Lion from the Southern Gulf of California to the Western Baja California Peninsula, Mexico

2018 ◽  
Vol 44 (3) ◽  
pp. 293-298
Author(s):  
Fernando R. Elorriaga-Verplancken ◽  
Patricia Meneses ◽  
Abraham Cárdenas-Llerenas ◽  
Wayne Phillips ◽  
Abel de la Torre ◽  
...  
Keyword(s):  
Gulf Of California ◽  
Baja California ◽  
Baja California Peninsula ◽  
Sea Lion ◽  
California Sea Lion
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