Biometric relation between body size and otolith size of seven commercial fish species of the south-western Atlantic

2018 ◽  
Vol 34 (5) ◽  
pp. 1176-1179 ◽  
Author(s):  
Daniel Alvares Silveira de Assis ◽  
Jonas de Andrade Santos ◽  
Leonardo Evangelista de Moraes ◽  
Alexandre Clistenes de Alcântara Santos
2017 ◽  
Vol 33 (1) ◽  
pp. 102-107 ◽  
Author(s):  
K. V. Aneesh Kumar ◽  
K. P. Deepa ◽  
M. Hashim ◽  
C. Vasu ◽  
M. Sudhakar

Author(s):  
Gustavo Luis Hirose ◽  
Vivian Fransozo ◽  
Carolina Tropea ◽  
Laura S. López-Greco ◽  
Maria Lucia Negreiros-Fransozo

Some crustaceans show variations of their reproductive biology within their geographical distribution, and knowledge about such variations is important for the comprehension of their reproductive adaptations. This study compared two populations of the fiddler crab Uca uruguayensis from two locations on the south-western Atlantic coast: Ubatuba Bay, São Paulo, Brazil and Samborombón Bay, Buenos Aires, Argentina. The population features analysed were the body size variation (carapace width = CW) and the size at the onset of sexual maturity (SOM) in order to test the hypothesis that the size at SOM, should be the same in relative terms (RSOM), independently of the latitudinal position. In the Brazilian population the CW ranged from 4.18 to 11.60 mm for males and 3.90 to 9.80 mm for females, and in the Argentinean population from 3.60 to 14.10 mm for males and 2.85 to 12.00 mm for females. In the Brazilian population the SOM was 7.1 (RSOM = 0.58) and 5.9 mm CW (RSOM = 0.57) for males and females, respectively, and in the Argentinean population it was 7.0 (RSOM = 0.42) and 6.75 mm CW (RSOM = 0.53) for males and females, respectively. This fact is probably related to a great plasticity in the life history features of Uca uruguayensis under different environmental conditions.


2004 ◽  
Vol 68 (1) ◽  
pp. 179-188 ◽  
Author(s):  
Konstantinos I. Stergiou ◽  
Dimitrios K. Moutopoulos ◽  
Georgiois Krassas

2021 ◽  
Vol 22 (2) ◽  
Author(s):  
Abdul Syukur ◽  
Agil Al Idrus Idrus ◽  
Lalu Zulkifli

Abstract. Syukur A, Al-Idrus A, Zulkifli L. 2021. Seagrass-associated fish species’ richness: evidence to support conservation along the South Coast of Lombok Island, Indonesia. Biodiversitas 22: 988-998. The concept of seagrass conservation at a global scale tends to be less appropriate with regard to the environmental conditions at the regional and local scales, and thus, there is a need for scientific studies at the regional and local scales to support conservation measures. This research aimed to describe the importance of seagrass conservation based on the species richness of seagrass-associated fish. Data were collected from seven seagrass locations using surveys and observation. Data on the fish species present were collected with the gear used by small-scale fishermen to catch fish in the seagrass area and the surrounding waters. Data analysis was descriptive; the statistical analyses performed included calculation of the Shannon-Wiener index of diversity (H '), the Simpson evenness index (E), and the Morisita species richness index (D) as well as cluster analysis. All statistical analyses were performed in IBM SPSS Statistics 25. We found 104 fish species belonging to 38 families. Leiognathidae, Apogonidae, Clupeidae, Carangidae, Channidae, Sillaginidae, and Mullidae are families with high abundance, and 16 fish species have an abundance of individuals above the average value (192 individuals) of the total number of individuals (20,352). Meanwhile, 94.37% of the fish families are the target catch of small-scale fishermen (commercial fish). The diversity of fish species associated with seagrass in the study location is evidence of the survival of seagrass provision services at the local scale for fish. Therefore, scientific evidence of the species richness of fish, species yang domina, and its importance for small-scale fisheries at each seagrass bed in the study location can be used as a source of information for increasing and improving seagrass conservation efforts at the local scale.


Author(s):  
Edward Vladimirovich Nikitin

Shallow coastal waters of the Volga river is a flooded feeding area for fish juveniles of nonmigratory fish species. There takes place annual downstream migration of fluvial anadromous fish species from spawning grounds of the Volga river to the Northern Caspian Sea. The most important factors determining the number and qualitative characteristics of fry fishes are the level of the Caspian Sea (currently having a tendency to the lowering), hydrological and thermal regimes of the Volga river. Researches were carried out in definite periods of time. In the summer-autumn period of 2012 fry fishes were presented by 19 species (13 of them were commercial species), which belonged to 9 families. The article gives data on all the commercial fish species. In the first decade of July the maximum number of fry fish was registered in the western part of the Volga outfall offshore - in box 247 (19.86 mln specimens/km2), in the eastern part - in box 142 (20.4 mln specimens/km2). The most populous were roach, red-eye, silver bream and bream; size-weight characteristics were better in the areas remoted from the Volga delta. In the third decade of July the quantitative indicators of fry fish on these areas decreased, size-weight characteristics greatly increased. In the second decade of October in the western part of the seaside there were registered increased pre-wintering concentrations of fish juveniles, their qualitative indicators increased, which is evidence to favorable feeding conditions in 2012.


2021 ◽  
Vol 166 ◽  
pp. 112172
Author(s):  
Tiphaine Mille ◽  
Amaëlle Bisch ◽  
Nathalie Caill-Milly ◽  
Pierre Cresson ◽  
Jonathan Deborde ◽  
...  

2021 ◽  
pp. 103479
Author(s):  
Guilherme H. Pereira-Filho ◽  
Vinícius R. Mendes ◽  
Chris T. Perry ◽  
Gustavo I. Shintate ◽  
Willians C. Niz ◽  
...  

1951 ◽  
Vol 5 (4) ◽  
pp. 810-811

A joint meeting of the Research Committee on Agriculture, Fish, Wildlife and Forestry and the Preparatory Fisheries Committee was held in Trinidad on July 9, 1951. The meeting, under the chairmanship of the United Kingdom representative (Frampton), discussed proposals regarding commercial trawl fishing in the Gulf of Paria and the organization of the Fisheries Conference. The committee felt that a survey of commercial trawl fishing should be undertaken at an estimated expense of $2,000. The committee also recommended that the Fisheries Conference, to be held in March 1952 for five days, should meet in Trinidad and have an agenda as follows: occurrence and distribution of commercial fish species in the Caribbean, techniques used in the Caribbean for fish capture, types of fishing craft used, marketing, storing, distribution, conserving methods, and cultivation of fish in ponds.


2011 ◽  
Vol 158 (11) ◽  
pp. 2405-2418 ◽  
Author(s):  
M. Carla de Aranzamendi ◽  
Ricardo Bastida ◽  
Cristina N. Gardenal

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